Great Falls Historic Weather Records
Analyse hottest, coldest, windiest & wettest days

Great Falls Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	-10.656250000000002	-5.9		-2.1249999999999996	-0.8
	-8.03125	0.3		-0.19374999999999987	6.9
	-8.106250000000001	-0.2		-0.5249999999999999	5.5
	-8.59375	0.5		-0.9937499999999999	9.9
	-8.78125	-2		-2.1187500000000004	5.7
	-8.29375	-2		-1.06875	1.8
	-7.656250000000001	-3.1		-0.28749999999999987	5
	-9	-6.2		0.2312499999999998	2.8
	-8.0375	-6.7		0.3562500000000001	1
	-9.66875	-1.7		-0.5562500000000002	5.4
	-10.606250000000001	0.6		-3.2625	7
	-10.206249999999999	4		-1.075	8.6
	-7.71875	3.8		-0.23125	11.2
	-7.8375	0.4		-0.4562500000000001	12.4
Jan.	-8.59375	-3.2		0.33125000000000004	2.1
	-7.4312499999999995	-7.3		0.5624999999999998	-0.4
	-6.856249999999999	-10		0.7999999999999996	5
	-8.20625	-4.7		-0.18750000000000022	4
	-8.600000000000001	-8.6		-0.6187499999999999	10.7
	-8.243750000000002	-5		1.6125000000000005	1.8
	-5.2124999999999995	-9.5		2.5437499999999997	-4.5
	-4.8875	-14.9		1.20625	-6
	-5.35	-17.7		1.525	-11.7
	-5.2125	-17.6		2.6999999999999997	-9.2
	-4.387499999999999	-16.4		2.3874999999999997	-3.9
	-4.4	-10.2		3.0749999999999997	3.3
	-4.99375	-5.4		2.8875	5.7
	-5.08125	-5		3.7624999999999993	4.3
	-4.706250000000001	-3.1		3.5875000000000004	7
	-5.64375	-1.8		2.28125	6.1
	-7.54375	-0.4		1.5312499999999998	9.2
	-7.475	0.1		2.2124999999999995	8.8
	-8.799999999999999	-1.2		1.1562499999999998	7.3
	-10.237500000000002	0		-0.7250000000000001	8.2
	-9.931249999999999	-0.1		-1.65625	11.9
	-9.75	-0.5		-1.03125	15.5
	-10.049999999999999	-3.8		-2.925	15
	-10.725	0.9		-2.3937500000000003	15
	-12.350000000000001	4.2		-2.8937500000000003	12.6
	-12.200000000000001	-1.6		-2.4749999999999996	6.5
	-11.862500000000002	-3.8		-1.6749999999999998	5.7
	-10.8125	-6.7		-1.8562500000000004	6.6
	-8.95625	-3.7		1.1812500000000004	7.2
	-6.1625	-1.4		2.2437500000000004	7
	-7.550000000000001	-1.7		0.6562499999999997	10.3
Feb.	-7.300000000000001	1.3		0.09999999999999964	9.9
	-6.8375	-0.7		1.525	12.3
	-7.356250000000001	-7.7		0.2687500000000005	0.6
	-9.4625	-12.7		-1.06875	-8
	-8.28125	-17.5		-0.2437499999999999	-8.3
	-8.16875	-15.4		0.575	2
	-9.54375	-12.3		0.36875	0.7
	-8.356250000000001	-15.4		-0.6437500000000005	2.2
	-10.118750000000002	-5.5		-1.10625	7.3
	-9.537500000000001	-1.8		-1.4374999999999998	6.6
	-8.88125	-1.3		0.26874999999999977	5.6
	-9.962499999999999	-0.5		1.0062499999999999	7.8
	-8.10625	-0.4		1.6375000000000002	5.8
	-6.7875000000000005	-4.3		3.7124999999999995	1.9
	-6.656249999999999	-5.8		3.08125	10.5
	-7.1187499999999995	-4.1		1.7375000000000003	12.6
	-7.31875	-1.6		1.7249999999999999	13.6
	-7.125	2		2.599999999999999	11.1
	-5.956250000000002	1.2		3.9249999999999994	8.2
	-5.79375	-0.6		4.824999999999999	6.9
	-5.875000000000001	-1.3		5.9937499999999995	12.1
	-4.83125	6		5.50625	14
	-4.612500000000001	-2.4		4.6499999999999995	5.2
	-4.2250000000000005	-5.6		6.11875	2.6
	-3.80625	-4.9		7.106250000000002	5.7
	-2.19375	1		8.575	6.3
	-1.7750000000000001	-2.2		9.106249999999998	1.1
	-0.7125	-5.6		9.05625	1
Mar.	-1.325	-13.4		8.7	-0.2
	-2.1687499999999997	-3		7.762499999999998	7.4
	-2.9812500000000006	2.7		7.0125	11.3
	-2.2125	4.7		7.9875	16.9
	-1.8187499999999999	6.2		7.837499999999999	18.9
	-1.9999999999999996	7.2		7.4875	19.4
	-2.33125	3.3		8.106250000000001	13.8
	-2.06875	-1.7		7.675	12.1
	-2.5125	-0.4		7.656249999999998	15.5
	-1.9499999999999997	4.3		7.487499999999999	11.6
	-1.9937499999999997	2.1		7.724999999999998	13.7
	-1.3250000000000002	-1.7		9.36875	7.2
	-0.575	-5.2		10.200000000000001	12.6
	0.3125	0.3		11.10625	14.9
	0.43125	3.6		9.78125	14.5
	-0.25625	-3.1		9.718749999999998	6.8
	-0.5562500000000001	-4.8		9.856250000000001	8.9
	-0.64375	-4.6		9.781250000000002	16.3
	-1.4687499999999998	-0.1		8.825	8.3
	-1.55625	-0.7		9.04375	12.3
	-0.006250000000000033	0.2		11.399999999999999	18.4
	-0.43125000000000013	-2.5		10.59375	15.9
	0.36249999999999993	-1.5		10.043750000000001	16.6
	0.27499999999999997	5.8		11.91875	19.1
	0.9249999999999998	-4		10.643749999999999	14.4
	-0.76875	-2.8		10.33125	15.5
	0.7	-2.8		12.9125	23.7
	1.7374999999999998	6.2		11.60625	22.2
	-0.34999999999999987	5.4		9.187499999999998	17.9
	-0.50625	4		8.881250000000001	18
	-0.6499999999999999	7.3		9.275	17.1
Apr.	-0.33125000000000004	5.1		10.325000000000001	17.8
	-0.7124999999999999	-3.6		9.568750000000001	4.1
	-0.9375000000000001	-5.4		11.1625	7.5
	-0.06875	-0.7		11.725000000000001	18.7
	1.0499999999999998	-0.9		11.6125	24.3
	0.4500000000000002	4.9		12.387500000000001	27.2
	0.9562499999999999	7.3		13.043749999999998	28.8
	1.75	6.8		13.893750000000002	25.4
	2.2125000000000004	0.4		13.725	6.5
	2.6125	-4.9		14.893750000000002	3.5
	3.7562500000000005	-4.4		14.812499999999998	6.5
	3.4750000000000005	-5.1		14.587499999999997	3.1
	4.31875	-6.2		15.006249999999996	10.1
	3.0437499999999997	-1.6		13.306249999999999	15.5
	2.73125	-0.3		12.4625	16.5
	2.9249999999999994	0.8		14.175	21.5
	3.65	2.8		15.25625	26.6
	3.85	4.8		15.3875	22.7
	3.6874999999999996	4.8		16.18125	27.2
	4.8625	8.7		17.349999999999998	16.3
	5.24375	1		17.275	10.1
	4.9625	-3.7		16.64375	24.8
	4.7375	11.2		15.399999999999999	22.6
	3.41875	7		15.50625	24.9
	4.2562500000000005	9.8		15.825000000000003	20
	4.58125	6.7		16.60625	28.6
	4.2625	9.2		15.706249999999999	25.2
	4.893750000000001	5.8		18.087500000000002	27.5
	5.925	8.5		17.775000000000002	33.8
	5.9	7.5		18.037499999999994	20.1
May	6.55	7.8		19.093750000000004	17.4
	7.3875	6.9		19.487499999999997	13.7
	7.262500000000001	0.7		18.59375	5
	6.674999999999999	-0.5		17.375	15.9
	5.925	1.7		16.71875	15.9
	5.375	5.1		16.15	13.2
	5.281250000000001	4.1		17.28125	15.8
	6.39375	2.8		17.725	22.3
	6.475	4.7		17.356250000000003	24.2
	6.875	8.7		16.237500000000004	29
	6.737500000000001	9		18.19375	31.9
	7.1187499999999995	13.1		18.5125	33.9
	8.0375	14.9		18.487499999999997	31.1
	7.6375	13.2		17.89375	32.4
	6.85625	13.1		19.537499999999998	32.1
	7.89375	13.5		19.893749999999997	19.5
	8.162500000000001	8.4		20.987499999999997	10.9
	8.775	5.5		21.11875	11.3
	8.51875	6.7		20.731249999999996	13.5
	9.0625	7.6		21.593750000000004	20.8
	9.75625	11.1		22.912499999999998	24.5
	9.46875	7.6		22.737500000000004	27.2
	9.25	12.8		22.931250000000002	27.1
	9.618749999999999	5.4		22.662499999999998	15.5
	9.8875	4.6		22.962500000000002	25
	10.181249999999999	9.7		22.94375	22
	9.325	8.7		20.86875	16.8
	9.2375	8.1		20.48125	21.9
	9.50625	7.4		22.84375	20.1
	10.375	6.9		23.475	19.1
	9.925	4.6		22.00625	25.9
Jun.	9.45	7.4		21.581250000000004	29
	8.575	16.6		21.056250000000002	30.6
	9.137500000000001	10.5		21.3625	22.1
	9.512499999999998	9.3		21.312500000000004	19.8
	9.53125	6.8		21.425	25.7
	9.187500000000002	8.8		20.375	30.3
	8.76875	11.1		21.874999999999996	26.4
	9.662500000000001	10.6		22.375	18.9
	9.8125	5.2		24.581249999999997	25.5
	10.81875	9		25.231250000000003	27.4
	11.568750000000001	11.4		25.6625	25.4
	11.943750000000001	12.2		25.375000000000004	29.3
	11.799999999999999	10.1		26.856250000000003	21.5
	12.518749999999999	9.6		27.125	16.6
	12.618750000000002	8.9		26.462500000000002	17.8
	12.593750000000002	11.1		26.3625	21.8
	12.8375	11.8		27.875000000000004	27.2
	13.593749999999998	11.1		27.668750000000003	26.9
	13.568749999999998	12		27.387500000000003	28.6
	13.05625	10.9		26.89375	30.9
	12.843750000000002	15.9		25.556250000000002	31.8
	12.34375	8.9		27.500000000000004	27.6
	13.10625	12.5		27.41875	29.2
	13.200000000000001	11.8		28.775	34.2
	14.043749999999998	13.4		30.3625	31.5
	14.931249999999999	12.4		30.99375	33.8
	14.69375	14.8		28.3875	36.9
	14.26875	17.6		30.150000000000002	38.7
	15.262500000000001	16.8		29.224999999999998	36.4
	14.618749999999999	18.2		28.65	34.5
Jul.	14.425	14.5		28.84375	32.7
	14.275	16.3		29.98125	35.9
	14.499999999999998	18.6		29.69375	36.3
	15.25	16.9		30.10625	37.1
	15.237500000000002	18.3		29.925000000000004	33.7
	14.975	12.5		30.062500000000004	31.1
	15.062500000000002	17.6		29.71875	32.2
	14.80625	16.2		30.0875	34.2
	14.89375	17.6		31.4125	35.9
	15.35	20.2		31.150000000000002	36.4
	14.84375	16.9		30.506249999999994	39.6
	14.900000000000002	17.3		29.818750000000005	36.4
	14.968749999999998	15		28.65625	34.4
	14.693749999999998	15.6		29.212500000000002	35.5
	15.425	14.3		30.637500000000003	34.2
	15.8625	16.4		31.743749999999995	35.6
	16.44375	19		32.65625	36.6
	16.675	14.5		32.481249999999996	39.6
	16.675	18		30.275	30.5
	16.0875	10.2		30.775000000000006	22.3
	15.7875	6.6		28.3	28
	14.674999999999999	8.2		27.418750000000003	30
	14.65	10.4		29.199999999999996	29.9
	14.956249999999997	10.6		29.4125	33.9
	14.550000000000002	13.1		27.55625	32.8
	14.14375	13.2		28.35	30.1
	14.9875	11.6		29.037499999999998	32.5
	15.2	13.8		29.56875	31.4
	14.949999999999998	13.2		29.393749999999997	27.1
	15.006250000000001	13.3		29.1625	17.3
	15.212500000000002	13.6		29.56875	15.7
Aug.	14.993749999999999	10		29.73125	27.4
	14.374999999999996		14	29.075		29.5
	14.262499999999998		17.6	28.43125		29
	14.74375		14.1	28.28125		30.2
	14.08125		12.4	28.387500000000003		31
	14.262499999999998		16	27.606250000000003		29.7
	13.83125		16.8	27.59375		35.9
	14.137500000000001		20.3	27.80625		36.2
	14.468750000000002		16.1	27.056249999999995		30.2
	13.350000000000001		13.3	27.131250000000005		26.3
	12.90625		12.5	27.11875		27.1
	13.10625		13.1	27.199999999999996		28
	13.093750000000002		13.9	27.125		28.1
	13.6625		13.3	28.5875		27.7
	13.9375		13.8	27.8625		28.4
	14.2125		13.8	27.38125		26.9
	12.312499999999998		12.8	26.04375		26.6
	12.649999999999999		12.9	27.0875		27.6
	13.04375		13.1	28.337499999999995		27.9
	12.950000000000001		12.6	26.724999999999998		26.6
	12.531250000000004		12.8	24.50625		23.9
	11.36875		11.2	24.537499999999998		25.6
	11.393749999999999		11.6	25.568750000000005		25.1
	11.562500000000002		11	25.7375		25.3
	11.24375		11.3	25.2		25.3
	10.775		11.1	22.593749999999996		23.4
	10.70625		10.6	23.80625		23.5
	10.46875		10	23.99375		23
	10.25625		9.5	23.73125		22.9
	10.3		10.1	21.349999999999998		22.2
	8.731250000000001		9.6	21.099999999999998		22.8
Sep.	10.137500000000001		10.2	23.50625		23.3
	10.44375			22.3875
	8.93125			21.9
	9.60625			22.51875
	9.1375			20.093750000000004
	8.75625			20.393749999999994
	8.36875			20.606250000000003
	9.25625			20.143750000000004
	9.387500000000001			21.718750000000004
	9.28125			22.2375
	9.581249999999999			24
	10.293750000000003			23.0125
	9.143749999999999			21.06875
	7.8625			20.01875
	7.062500000000001			19.85625
	8.01875			19.275
	6.850000000000001			17.19375
	5.637499999999999			17.85
	5.437500000000001			15.90625
	4.7875			15.268749999999997
	4.475			16.4375
	5.49375			16.775000000000002
	6.074999999999999			17.606250000000003
	4.93125			17.35
	5.19375			17.275000000000002
	5.2625			18.30625
	4.6875			13.13125
	2.3499999999999996			12.06875
	2.2125			13.7625
	3.0875000000000004			14.087500000000002
Oct.	4.0249999999999995			15.118750000000004
	5.075			15.99375
	4.81875			16.9875
	3.89375			14.69375
	4.3			15.418749999999998
	5.0062500000000005			16.075
	4.35625			14.9625
	3.375			14.499999999999998
	2.2125			11.25625
	0.8125			12.043750000000001
	1.3			10.75
	-0.7874999999999999			7.856249999999999
	-1.2875			8.36875
	-1.1625000000000003			10.08125
	-0.4437500000000001			9.787500000000003
	-0.65			9.575
	1.9937500000000004			12.756250000000001
	0.32499999999999973			9.868749999999999
	0.69375			10.124999999999998
	0.8625			9.425
	0.50625			9.5
	0.5312500000000001			9.45
	-0.43125			7.818750000000001
	-1.36875			7.825000000000001
	-2.10625			7.91875
	-3.68125			6.637500000000001
	-4.768750000000001			3.8375
	-5.5			4.125
	-4.0375000000000005			5.78125
	-1.4562499999999998			7.231249999999999
	-0.6499999999999997			7.3374999999999995
Nov.	-0.8750000000000001			7.8500000000000005
	-2.825			6.19375
	-3.8812500000000005			5.012499999999999
	-3.825			5.8375
	-4.7375			4.5125
	-5.343750000000001			3
	-4.0687500000000005			5.375
	-0.9312500000000001			7.00625
	-2.6812500000000004			4.7437499999999995
	-4.437499999999999			3.5812500000000003
	-3.9312500000000004			3.31875
	-2.925			4.331250000000001
	-2.8375000000000004			5.5625
	-5.53125			4.2749999999999995
	-6.725			0.85
	-6.66875			1.50625
	-3.9437499999999996			3.5062499999999996
	-4.75			3.0125
	-5.26875			2.2687500000000003
	-5.268750000000001			2.31875
	-6.237499999999999			1.7062500000000003
	-6.2625			1.8562500000000002
	-5.83125			2.3125
	-4.649999999999999			2.6937499999999996
	-4.725			2.93125
	-5.91875			2.55625
	-5.7375			1.825
	-4.375			2.5562500000000004
	-4.45			1.81875
	-5.362499999999999			1.8312500000000003
Dec.	-6.168749999999999			1.3937500000000003
	-6.3875			1.0625
	-7.325000000000001			-0.09375
	-7.425000000000001			1.38125
	-7.54375			-0.27499999999999997
	-6.8999999999999995			0.2749999999999999
	-5.568749999999999			1.6875
	-6.325000000000001			-0.08124999999999993
	-7.918750000000001			1.1749999999999998
	-6.475			0.9187500000000002
	-8.45			-1.4624999999999997
	-9.98125			-1.949999999999999
	-8.331249999999999			-0.8187499999999996
	-7.443750000000001			-0.16875000000000043
	-9.000000000000002			-1.2687499999999996
	-9.5875			-1.9562500000000003
	-10.4			-3.9999999999999996

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

40°C

Highest Temp

25 Jul. 26

-18°C

Lowest Temp

23 Jan. 26

Seasonal Breakdown

Hottest MonthJuly33.74°C

Coldest MonthJanuary-5.13°C

Wettest MonthJune3.26mm

Windiest MonthMarch30.55km/h

Great Falls 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 Great Falls historically?

July is historically Great Falls's hottest month, with average maximum temperatures around 30°C. During peak heatwave events, the highest recorded temperatures have reached 40°C on 2024-07-24.

2. What is the coldest month in Great Falls historically?

February is Great Falls's coldest month, with average minimum temperatures around -9°C. The all-time record low of -37°C was recorded on 2021-02-12.

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

Great Falls's average annual rainfall is approximately 450.01mm, based on records spanning 17 years.

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

Great Falls historically records approximately 150.2 rainy days per year. June has the highest number of rain days at an average of 15.8 days.

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

The all-time highest temperature recorded in Great Falls is 40°C on 2024-07-24.

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

The all-time lowest temperature recorded in Great Falls is -37°C on 2021-02-12.

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

Great Falls experiences its strongest winds during November. The historic gust record of 74.5 kph was recorded on 2025-08-20.

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

Usually, Great Falls's humidity peaks in January at around 74.8% and drops to its lowest in August at approximately 40.7%.

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Yearly Summary 2026

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Great Falls Historic Weather Records
Analyse hottest, coldest, windiest & wettest days