Boise Historic Weather Records
Analyse hottest, coldest, windiest & wettest days

Boise Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	-8.38125	1.7		-1.1812500000000001	5.2
	-7.7749999999999995	1.6		-0.0437499999999999	6.5
	-6.71875	-0.9		1.4875000000000003	6
	-4.7375	3.2		1.7875	5.5
	-4.24375	0.7		2.53125	3.5
	-4.187499999999999	0.2		2.1375	5.2
	-5.168750000000001	-0.5		2.56875	3
	-4.09375	-3.6		3.2187500000000004	1.1
	-2.81875	-2.2		2.875	3.7
	-4.2250000000000005	-1.2		2.3062499999999995	5
	-4.7375	-4.6		2.475	3.6
	-4.199999999999999	-5.1		2.0375	3.3
	-4.824999999999999	-1		1.8375000000000004	6.1
	-5.475	-2.3		2.318749999999999	7.8
Jan.	-6.1125	-1.6		1.9749999999999999	0.1
	-5.106249999999999	-2.1		1.7500000000000002	1.6
	-4.906249999999999	-2.3		3.0187499999999994	4.3
	-3.2875	-1.8		4.35	-0.1
	-3.2250000000000005	-2.8		3.4375	0.5
	-3.70625	-6.4		3.1625	1.6
	-3.7124999999999995	-3.9		3.38125	-0.8
	-4.03125	-4		3.0062499999999996	-1.1
	-3.6062499999999993	-4.7		3.3124999999999996	1.4
	-3.85625	-8.4		3.50625	0.6
	-3.2937500000000006	-4.6		3.71875	2.6
	-3.69375	-5.2		4.2625	3.2
	-3.6125000000000003	-0.9		3.4375	6.8
	-3.4562500000000003	-3.1		4.175000000000001	4.3
	-3.8125	0.3		3.8312500000000007	6.1
	-4.312499999999999	-0.1		3.9375	6.3
	-3.5062499999999996	0.5		4.51875	8.4
	-2.5500000000000003	0.4		5.05625	8.9
	-3.237499999999999	1.4		4.75625	9.1
	-2.7687500000000007	0.8		4.081250000000001	8.6
	-1.825	-0.9		6.093749999999999	10.9
	-1.3875	0.9		6.0687500000000005	12.1
	-1.4812499999999997	2.6		5.64375	11.3
	-1.8562499999999997	5		5.875	12.7
	-2.14375	3.1		5.30625	12.3
	-2.03125	0.2		5.48125	7.1
	-3.3625000000000007	1.8		5.5562499999999995	7.1
	-3.3375000000000004	0.3		5.4624999999999995	6.7
	-2.5375	0.1		6.05	8.4
	-2.525	0.2		6.456250000000001	6.8
	-0.99375	0.5		6.643750000000001	10.5
Feb.	-1.1	1.6		6.71875	12.7
	-1.56875	1.4		6.299999999999999	13.2
	-2.19375	0.5		5.9624999999999995	5.3
	-2.5500000000000003	-0.9		5.9	3.8
	-2.6687499999999997	-3.8		5.3375	4.2
	-2.5125	-1.6		4.7875	6.4
	-2.8000000000000003	-5.5		5.0625	7.2
	-3.1625000000000005	1		4.76875	14.1
	-3.6750000000000003	2.2		4.7	9.8
	-2.50625	3.5		5.862500000000001	6
	-2.6	0.5		6.1625	5.4
	-3.1687499999999997	-0.1		5.925000000000001	11.2
	-2.3562500000000006	0.1		6.2375	13.2
	-2.4125000000000005	2.3		7.41875	11.6
	-0.625	6.5		8.706250000000002	11.2
	-0.48750000000000004	3.5		9.075000000000001	9.3
	-0.7624999999999998	-1		7.96875	13
	-0.55625	1.4		8	9
	-0.26249999999999996	0.2		9.51875	6.7
	0.6499999999999999	-1.3		9.78125	5.3
	-0.71875	2.6		8.731250000000001	10.2
	-0.7374999999999999	3.6		8.543750000000001	14.5
	-0.4062499999999999	3.3		8.793750000000001	7.4
	0.11250000000000004	-1		10.024999999999999	6.6
	0.7999999999999998	-2.3		11.143750000000002	9.3
	1.5124999999999997	4.8		12.275000000000002	12.8
	1.6187500000000004	6.7		11.831249999999999	13.5
	1.9250000000000003	0		11.4375	10.5
Mar.	2.6812500000000004	-2.9		11.287500000000003	6.1
	2.25625	2.7		11.331249999999999	16.1
	1.5437499999999997	5		11.0875	18.4
	1.6249999999999998	4.4		11.443749999999998	24.4
	0.7562500000000001	6.8		11.012500000000001	24.3
	1.9	9.4		11.94375	24.6
	2.8312499999999994	8.1		11.9	17.9
	2.4437500000000005	4.3		11.5625	15
	1.725	5.4		11.46875	18.2
	2.1	8.1		11.049999999999999	17.5
	2.3312500000000003	6.5		12.125	14.3
	1.88125	0.7		11.643750000000002	11.4
	2.275	1.6		12.575000000000001	17.7
	2.94375	4.1		12.762500000000001	20.7
	2.9937499999999995	7.9		12.250000000000004	21.7
	2.20625	4.3		12.381250000000001	11.1
	3.1374999999999997	4.6		13.15	11
	2.68125	7		12.893749999999999	14.2
	2.375	2		11.562499999999998	9.2
	1.5562500000000001	0.1		12.443750000000001	15.6
	3.59375	2.4		13.987499999999999	20.7
	3.206249999999999	6.6		12.006250000000001	25.4
	2.55625	6.5		12.18125	25.1
	3.71875	7		13.999999999999998	24.8
	3.60625	4.9		13.825000000000001	22.9
	2.5375	4.3		14.393749999999999	25.6
	3.9625000000000004	9		16.5375	24.6
	4.824999999999999	10		15.08125	17
	3.743750000000001	6.2		13.699999999999998	11.3
	3.0437499999999993	4.3		13.4375	12.6
	2.475	3.6		12.893749999999999	15.6
Apr.	3.0874999999999995	5.1		14.612500000000002	15.4
	3.99375	0.1		15.29375	6.8
	3.3062500000000004	-2		14.625000000000002	12.2
	3.5875	3.3		15.59375	20.8
	4.218750000000001	3.9		16.55625	26.7
	4.6000000000000005	6.4		16.2375	28.3
	5.018750000000001	8.5		17.056250000000002	29.3
	5.174999999999999	6.1		16.999999999999996	13.6
	4.825000000000001	4.5		16.9	14.8
	6.06875	2.6		16.325	11.3
	5.356249999999999	0.5		16.912499999999998	16
	5.7625	1.5		16.89375	16.3
	5.3999999999999995	1.4		17.3	17.5
	5.31875	3.1		15.687500000000002	19.6
	4.71875	7.9		16.218750000000004	22.2
	5.34375	4.4		17.38125	23.2
	4.9375	9.2		17.5875	26.5
	5.48125	12.2		19.075	28.4
	6.762499999999998	8.3		19.71875	27.9
	7.15	8.1		19.6625	27.1
	8.137500000000001	11.5		20.043750000000003	27
	7.44375	8.8		19.125	27.5
	6.96875	10.8		17.587500000000002	27.3
	6.175000000000001	9.4		18.49375	27.4
	6.68125	8.4		18.975	26.5
	6.98125	12		19.39375	31.5
	7.9750000000000005	12.8		21.15625	28.9
	8.381250000000001	12.1		21.45	35.3
	8.45625	13.5		21.5125	26
	9.331249999999999	7.3		22.025000000000002	24.7
May	9.543750000000001	7.8		21.85	22.5
	9.75	8.1		20.35	17.2
	9.38125	4.2		20.01875	15.9
	9.249999999999998	5.4		19.41875	22
	8.14375	5.7		18.91875	20.7
	8.100000000000001	7.7		19.14375	20.9
	8.4375	9.3		19.48125	25.2
	8.4875	9.9		19.1375	27.3
	7.981250000000001	11.8		19.29375	30.1
	7.94375	13.7		19.512499999999996	30.4
	8.825	14.8		21.1875	34.2
	9.35625	14.1		20.875000000000004	24.8
	9.756250000000001	9.5		21.19375	30.4
	10.1125	14.6		21.0125	32.1
	9.799999999999999	9.8		22.312500000000004	27.3
	10.175	11.6		23.100000000000005	25.2
	11.6	8.5		24.21875	24.1
	11.306249999999999	8.1		23.1375	27.3
	11.768750000000002	9.3		24.325000000000003	29.6
	12.2625	12		25.54375	33.9
	13.09375	13.8		25.487499999999997	27.3
	12.718750000000002	11.4		25.875000000000004	31.3
	12.55625	13.2		25.46875	27.4
	12.649999999999999	8.9		25.25	21.8
	12.756249999999998	10.6		25.006249999999998	29.4
	12.468750000000002	13.4		25.275	23.9
	12.512500000000001	9.6		23.1125	20
	12.062499999999998	6.2		24.606250000000003	26.8
	12.562500000000002	9.8		25.843750000000004	29.4
	12.75625	11.6		25.3375	30.1
	12.03125	12.9		24.324999999999996	30.7
Jun.	12.143749999999997	12.9		24.343749999999996	32.9
	12.268749999999997	15.7		23.856250000000003	35.4
	11.556249999999997	16.8		23.86875	30.8
	11.849999999999998	12.3		24.58125	32
	11.775	14.1		23.906250000000004	36.5
	11.156250000000002	19.3		23.487499999999997	27.4
	12.062500000000002	14.2		25.506250000000005	31.3
	13.081249999999999	12.3		27.450000000000003	32
	13.987499999999997	13.7		28.875	35.4
	14.518749999999999	15.8		28.500000000000004	36.1
	15.0375	19.2		28.34375	34
	15.46875	16.1		29.074999999999996	24
	16.243750000000002	11.7		30.118750000000002	18.5
	16.175	8.3		30.474999999999998	20.1
	15.706249999999999	11.1		29.750000000000004	23.5
	16.018749999999997	11.7		30.312499999999996	28.7
	16.6125	14.7		32.15	29.2
	17.43125	12.5		31.287500000000005	30.3
	17.018750000000004	14.1		30.2	33.1
	16.762500000000003	16.1		30.781250000000004	36.3
	16.79375	18		30.712500000000002	38.4
	17.187500000000004	21.9		31.875000000000004	34.9
	17.86875	16.3		32.381249999999994	36.8
	17.79375	19		32.03125	37.7
	17.69375	17.3		32.9125	34.8
	18.15625	16.2		32.73125	39.7
	18.15	20.7		31.531249999999993	40.5
	17.575	19.7		33.131249999999994	37.4
	18.33125	23		32.55	37.4
	17.906249999999996	24.7		32.487500000000004	32.5
Jul.	18.43125	19.9		33.2	37.1
	18.39375	19		32.9875	41.3
	18.562499999999996	23.8		32.91875	38.5
	18.700000000000003	22.2		33.21875	38.6
	18.518750000000004	18.6		32.43125	38.5
	18.3875	19.8		33.268750000000004	41
	18.737499999999997	23.7		33.28125	37.5
	18.4625	22.5		33.356249999999996	36.6
	19.175	19.8		33.69375	40.3
	19.062499999999996	19.8		32.975	39.9
	18.7125	21.7		33.6625	39.5
	18.825	17.5		33.15625	36.1
	18.81875	15.7		32.925	35.4
	18.462500000000002	15.2		33.48125	36.9
	18.70625	16.2		34.231249999999996	36.9
	19.693749999999994	19.8		34.8625	37.1
	19.968749999999993	17.4		34.45625	40
	20.074999999999996	20.2		33.70625	38.9
	20.062499999999996	16.9		33.40625	30.6
	19.33125	12.5		33.462500000000006	29.8
	19.10625	10.9		32.4875	31.9
	18.0625	13.6		32.44375	36.1
	18.54375	17.4		32.3875	38.7
	18.75625	18.2		31.799999999999994	39.1
	17.931250000000002	18		31.206250000000004	38.3
	17.825000000000003	16		32.16875	36.8
	18.237499999999997	15.9		32.106249999999996	35.6
	18.5375	14.9		31.81875	36.8
	18.112499999999997	16.7		32.2125	34.8
	18.2	17.1		32.400000000000006	32.6
	18.01875	21.7		32.3125	33
Aug.	17.48125		22.7	32.075		33
	18.1125		17.2	32.55625		35
	18.075		19.1	32.44375		33.3
	18.168750000000003		16.7	32.556250000000006		32.7
	18.15625		14.4	32.34375		32.1
	18.0625		17.3	31.606250000000003		35.5
	17.65625		20.4	30.837500000000002		40.6
	17.0625		19.1	30.54375		33.6
	16.7		16.6	29.7625		29.3
	16.487500000000004		16.2	30.743749999999995		29.8
	16.775		16.5	29.643750000000004		30.4
	16.4875		17	30.36874999999999		30.8
	16.456249999999997		17	29.49375		30.1
	16.8875		16.3	30.762500000000003		30.5
	16.418750000000003		16.8	30.625		30.8
	16.218750000000004		16.3	29.481249999999996		29.1
	15.55625		15.6	28.924999999999997		28.9
	15.549999999999999		15.5	29.256249999999998		29.4
	15.650000000000002		15.9	30.068750000000005		30
	16.0875		16	28.831249999999997		29.1
	15.143749999999999		15.1	29.3625		29.4
	15.387499999999998		15.9	28.9625		29.7
	15.518750000000002		15.7	29.4		29
	15.65625		15.1	29.8		29.1
	15.562500000000002		15	28.14375		27.5
	14.493750000000002		14.4	26.987500000000004		27.2
	14.05625		13.9	27.21875		27.2
	13.700000000000001		13.5	27.193749999999998		26.8
	13.662500000000003		13.5	26.599999999999998		26.6
	14.281249999999998		14	25.906249999999996		26.7
	13.237500000000002		14.3	26.550000000000004		27
Sep.	13.90625			26.4875
	13.03125			25.224999999999998
	12.531249999999998			25.46875
	13.262500000000001			24.55625
	11.981250000000003			23.462500000000002
	11.73125			23.625
	11.14375			23.3625
	11.4875			23.15625
	11.468750000000002			23.531249999999996
	11.868750000000002			24.400000000000002
	11.556249999999999			24.406250000000004
	11.7875			24.318749999999994
	11.537500000000001			23.95
	11.087500000000002			23.612500000000004
	11.143750000000002			22.918749999999996
	10.887500000000001			22.03125
	10.225			21.175000000000004
	9.562500000000002			21.3
	9.6625			21.10625
	8.412500000000001			18.775000000000002
	7.962500000000001			19.66875
	8.08125			19.70625
	8.518749999999999			20.45625
	8.506250000000001			20.13125
	8.1375			19.8
	8.725			19.675
	7.349999999999999			16.55625
	5.9624999999999995			16.337500000000002
	6.312499999999999			17.56875
	6.868749999999999			18.174999999999997
Oct.	7.2875			18.5
	7.35			19.325000000000003
	7.3			17.95
	6.7375			17.35625
	6.48125			17.081249999999997
	6.84375			17.65625
	6.55625			16.831249999999997
	6.6			16.675
	5.6875			14.568750000000001
	4.79375			14.5
	4.81875			13.58125
	3.2625			11.78125
	2.4			12.24375
	3.750000000000001			13.15625
	3.7687499999999994			12.593749999999998
	2.9250000000000003			12.706249999999999
	4.356249999999999			14.30625
	3.6875			13.03125
	3.7875000000000005			12.1875
	3.00625			12.13125
	3.34375			11.006250000000001
	2.8250000000000006			11.837500000000002
	3.193749999999999			12.01875
	2.337500000000001			11.031249999999998
	1.2062500000000003			10.08125
	0.8562500000000002			10.0625
	0.5312499999999999			9.075
	0.09374999999999986			8.868749999999999
	0.42500000000000016			9.34375
	1.4562499999999998			9.63125
	1.59375			9.5875
Nov.	0.74375			9.3375
	-0.12499999999999994			7.612499999999999
	-0.2812500000000001			7.81875
	-0.3937500000000001			7.875000000000001
	-0.43125000000000013			6.66875
	-1.4062499999999998			6.3875
	-0.8749999999999999			6.8187500000000005
	-0.5062500000000001			7.1812499999999995
	-0.84375			7.29375
	-1.7812499999999996			5.73125
	-1.8875			5.575
	-1.00625			6.449999999999998
	-0.8875			6.3374999999999995
	-2.1			5.075000000000001
	-3.45			3.925
	-3.7624999999999997			3.39375
	-2.3562499999999997			4.2
	-2.0125			4.1125
	-3.06875			4.000000000000001
	-2.6249999999999996			4.73125
	-2.84375			3.9625000000000004
	-2.95625			3.7625000000000006
	-2.9625000000000004			3.3937499999999994
	-3.0875			3.381249999999999
	-3.287499999999999			3.43125
	-2.99375			3.625
	-2.20625			3.7687500000000003
	-2.10625			4.7437499999999995
	-2.7124999999999995			3.63125
	-3.5625			2.9375000000000004
Dec.	-3.425			2.725
	-3.66875			2.64375
	-4.062499999999999			2.7999999999999994
	-3.8874999999999997			2.86875
	-3.45			2.7187499999999996
	-3.2125			4.0375
	-2.5000000000000004			3.7374999999999994
	-3.306249999999999			3.86875
	-3.6187500000000004			3.2187500000000004
	-4.225			2.60625
	-4.45			2.225
	-6.099999999999999			1.0625
	-5.4375			1.225
	-5.4312499999999995			0.95
	-5.8875			1.675
	-5.95			0.8875
	-8.620000000000001			-0.5466666666666664

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

41°C

Highest Temp

16 Jul. 26

-8°C

Lowest Temp

24 Jan. 26

Seasonal Breakdown

Hottest MonthJuly37.1°C

Coldest MonthJanuary-2.1°C

Wettest MonthFebruary6.04mm

Windiest MonthMay22.67km/h

Boise Climate Change InsightsSee how climate patterns are evolving over time. Temperature shifts, rainfall trends, and extreme events—all in one place.

Weather City Ranking GloballyExplore Real time of the world’s hottest & Coldest Cities based on current temperature data.

Frequently Asked Questions

1. What is the hottest month in Boise historically?

July is historically Boise's hottest month, with average maximum temperatures around 33°C. During peak heatwave events, the highest recorded temperatures have reached 41°C on 2026-07-16.

2. What is the coldest month in Boise historically?

January is Boise's coldest month, with average minimum temperatures around -4°C. The all-time record low of -23°C was recorded on 2017-01-07.

3. What is the average annual rainfall in Boise over the past 17 years?

Boise's average annual rainfall is approximately 389.4mm, based on records spanning 17 years.

4. How many rainy days does Boise experience on average per year?

Boise historically records approximately 115.1 rainy days per year. December has the highest number of rain days at an average of 15.06 days.

5. What is the all-time highest temperature ever recorded in Boise?

The all-time highest temperature recorded in Boise is 41°C on 2026-07-16.

6. What is the all-time lowest temperature ever recorded in Boise?

The all-time lowest temperature recorded in Boise is -23°C on 2017-01-07.

7. What is the windiest time of year in Boise historically?

Boise experiences its strongest winds during April. The historic gust record of 50.4 kph was recorded on 2026-05-28.

8. What is the highest and lowest humidity in Boise during a year?

Usually, Boise's humidity peaks in January at around 81.2% and drops to its lowest in July at approximately 29.1%.

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Boise Historic Weather Records
Analyse hottest, coldest, windiest & wettest days

Boise Weather Trend Graph

Yearly Summary 2026

Seasonal Breakdown

Frequently Asked Questions

Recent Blogs On Weather

World Top 10 Hottest Cities Are All in India Again - May 2026

Delhi Air Quality 2026 vs 6-Year Historical PM2.5 Data

What 17 Years of Delhi Temperature Data Reveal About May's Heatwave Escalation

World Top Hottest Cities Belong to India - April 2026

Construction Air Pollution: The Invisible Hazard Reshaping India's Urban Air

Kitchen Air Pollution: How Cooking Can Spike Your Indoor AQI

Mumbai Air Quality Comparison of 2025 Vs 2026 (Jan-Feb)

Why AQI Standards Vary Across the World - And Why Air Quality Index Matters More Than Ever

Why Winter Suffocates and Monsoon Saves Delhi Air Quality 2025?

Winter vs Summer Air: Why Air Pollution Behaves So Differently Across Seasons

Boise Historic Weather RecordsAnalyse hottest, coldest, windiest & wettest days

Boise Weather Trend Graph

Yearly Summary 2026

Seasonal Breakdown

Frequently Asked Questions

Recent Blogs On Weather

World Top 10 Hottest Cities Are All in India Again - May 2026

Delhi Air Quality 2026 vs 6-Year Historical PM2.5 Data

What 17 Years of Delhi Temperature Data Reveal About May's Heatwave Escalation

World Top Hottest Cities Belong to India - April 2026

Construction Air Pollution: The Invisible Hazard Reshaping India's Urban Air

Kitchen Air Pollution: How Cooking Can Spike Your Indoor AQI

Mumbai Air Quality Comparison of 2025 Vs 2026 (Jan-Feb)

Why AQI Standards Vary Across the World - And Why Air Quality Index Matters More Than Ever

Why Winter Suffocates and Monsoon Saves Delhi Air Quality 2025?

Winter vs Summer Air: Why Air Pollution Behaves So Differently Across Seasons

Boise Historic Weather Records
Analyse hottest, coldest, windiest & wettest days