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

Ottawa Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	-8.63125	-16.8		-2.0625	-10.7
	-12.0125	-17.4		-3.4687499999999996	-9
	-11.799999999999999	-15.4		-5.099999999999999	-12.7
	-10.93125	-15.6		-2.5125	-11.5
	-11.037500000000001	-18.8		-4.7	-11.4
	-12.099999999999998	-13.4		-4.418749999999999	-6
	-13.93125	-4.9		-5.906249999999999	-0.5
	-13.15	-3.4		-4.7437499999999995	0.7
	-11.731250000000001	-0.9		-3.7625	3.6
	-11.975	-4.1		-2.08125	1.8
	-9.56875	-7.6		-3.1	-0.3
	-11.00625	-11.2		-1.8874999999999997	-1.2
	-12.249999999999998	-4.9		-4.3625	0.2
	-14.5875	-7.7		-5.7875000000000005	1.3
Jan.	-13.924999999999999	-17.3		-6.000000000000001	-7.6
	-14.24375	-19.1		-3.5875000000000004	-10.9
	-15.075	-10.2		-5.649999999999999	0.3
	-12.96875	-12.6		-3.5187500000000003	-2.3
	-13.50625	-16.9		-4.69375	-4.2
	-15.60625	-19.6		-7.231250000000001	-10.9
	-17.218750000000004	-14		-9.10625	-5.9
	-16.4375	-7.5		-7.318749999999999	-1
	-14.043750000000003	-18.2		-5.887499999999999	-9.9
	-15.206250000000002	-24.3		-5.668749999999998	-17.2
	-13.768749999999999	-24.1		-4.61875	-14.7
	-12.693750000000001	-16.1		-5.618749999999999	-10.4
	-11.3875	-17.8		-3.0875000000000004	-8.6
	-14.056250000000002	-17		-4.2562500000000005	-8.7
	-14.937499999999998	-15.7		-6.03125	-11
	-16.706249999999997	-21.7		-6.8	-15.3
	-16.581249999999997	-20.7		-6.0687500000000005	-14.6
	-14.525	-18.2		-4.831250000000001	-7.9
	-13.81875	-16.2		-5.3500000000000005	-4.1
	-14.35	-15.4		-4.16875	-4.3
	-13.362500000000002	-10.8		-4.356249999999999	-6.8
	-15.225	-13.5		-4.4750000000000005	-8.6
	-14.874999999999998	-11.7		-4.8687499999999995	-5.7
	-13.024999999999999	-19.8		-4.20625	-7.7
	-13.631249999999998	-22.9		-4.6312500000000005	-11.4
	-13.881249999999998	-18.5		-5.3500000000000005	-9.6
	-11.743749999999999	-14.4		-4.06875	-6.2
	-13.468749999999998	-8.2		-5.706250000000001	-2.1
	-14.993749999999999	-9.6		-5.243749999999999	-3.9
	-15.0625	-15.5		-5.7875000000000005	-2.6
	-14.50625	-10.4		-5.5125	-2.3
Feb.	-12.324999999999998	-17.1		-3.3249999999999993	-3.9
	-11.400000000000002	-7.8		-2.9437499999999996	-0.6
	-13.725	-1.6		-4.981250000000001	0.2
	-13.99375	-5.7		-2.78125	-1.8
	-12.162500000000001	-9.2		-2.3375000000000004	-0.2
	-12.03125	-9.8		-2.7375000000000007	-3
	-11.543750000000003	-9.2		-0.71875	-4.1
	-9.443749999999998	-14.6		-0.925	-1.8
	-9.3625	-8.7		-0.25625	-0.4
	-9.212499999999999	-18		-1.7125	-11
	-9.662499999999998	-12.5		-1.3875	0.3
	-11.749999999999998	-11.6		-3.518749999999999	-4.8
	-10.3125	-8.9		-0.44999999999999984	1
	-10.268749999999997	-4.2		-0.8062500000000002	2.3
	-11.012500000000001	-11.6		-1.5499999999999998	-8.5
	-11.924999999999999	-16.8		-3.2625	-4.3
	-12.156249999999998	-11.4		-3.05625	1.3
	-10.762500000000001	-3.4		-2.7624999999999997	1.4
	-10.56875	-3.5		-1.7374999999999996	1.4
	-10.318750000000001	-7		-0.4812500000000003	-2.5
	-8.450000000000001	-0.7		-0.7124999999999999	7.3
	-7.731250000000001	1.1		1.1687500000000002	7
	-6.718749999999999	1.5		2.46875	7.8
	-4.7875000000000005	1.1		3.7	6.9
	-3.9	-2.3		2.8375000000000004	1
	-7.062500000000001	-4.9		0.96875	1.3
	-7.375	-6.2		1.08125	0.6
	-5.56875	-3.7		2.55625	0.3
Mar.	-4.7875	-6.7		3.3312500000000003	-1.6
	-5.906250000000002	-0.7		1.93125	8
	-6.093750000000001	-10.7		3.2187499999999996	0.4
	-6.300000000000001	-11.5		3.6874999999999996	-3.7
	-6.4875	-5.1		3.53125	2.3
	-4.475	-2.1		5.30625	0.6
	-4.093750000000001	-3		5.531250000000001	3.1
	-6.106249999999999	-0.5		2.95	1.5
	-6.3999999999999995	-3		2.68125	1.7
	-4.71875	-5.7		3.406249999999999	0.3
	-4.9	-1.6		4.362500000000001	3.3
	-4.706250000000001	-2.7		3.2125000000000004	6.3
	-5.8125	-6.4		3.8874999999999997	0.1
	-3.5375	-8.9		4.837500000000001	-2.3
	-3.2875	-4.7		4.893750000000001	6
	-2.8625000000000003	1.4		5.2	11.5
	-2.11875	0.3		6.674999999999999	5.5
	-2.4249999999999994	0.3		6.1312500000000005	3
	-3.1312499999999996	-2.1		6.8500000000000005	6.6
	-1.4625	2.5		8.399999999999999	17.6
	-2.04375	0.1		6.2	4.9
	-2.2812499999999996	0.8		5.699999999999999	8.6
	-1.2625000000000002	-1.5		6.775	3.1
	-1.03125	-4.3		7.418750000000001	-1.8
	-1.3625000000000003	-7.4		7.4875	9
	-1.66875	-0.7		8.325000000000001	21.7
	0.13750000000000007	3.4		10.349999999999998	7.7
	1.0749999999999997	0.1		9.700000000000001	7.8
	1.2062499999999998	-0.4		10.656249999999998	10.4
	2.1625	4.8		12.274999999999999	17.1
	1.6375000000000002	6.2		12.049999999999999	9.1
Apr.	0.44999999999999996	5.3		10.250000000000002	9
	1.03125	7.2		9.850000000000001	13
	1.5875	6.5		10.45	19.8
	0.9312499999999998	7.2		11.362500000000002	26
	1.9499999999999997	0.4		11.068750000000001	6.2
	1.5937499999999998	-1.7		9.999999999999998	2.8
	1.84375	-3.7		11.05	10.2
	1.8812499999999999	3.4		11.70625	19.4
	1.1124999999999996	3.1		11.6875	17.8
	1.8499999999999999	0.1		11.76875	16.5
	1.84375	1.5		12.15625	16.9
	2.58125	2.8		10.881250000000001	22.2
	2.3750000000000004	4.8		12.343750000000002	25.9
	2.975	7.8		13.71875	25.2
	3.4625	10.1		13.2125	16.9
	2.8062500000000004	5.1		12.712499999999999	7.9
	3.8562499999999997	0.5		14.224999999999996	10.6
	6.5125	2.1		15.712499999999999	9
	6.4750000000000005	0.3		14.35625	14.5
	6.437500000000001	6.6		16.35625	23.6
	5.69375	9.6		16.1625	23.7
	5.60625	7		16.462499999999995	14
	5.025	3.9		16.60625	11.2
	4.94375	2		15.774999999999997	12.3
	5.425000000000001	3.9		14.781250000000002	19.9
	5.16875	5.4		16.16875	12.1
	4.78125	2.7		15.225000000000001	12.9
	5.7	0.6		17.712500000000002	17.1
	6.3875	6.8		18.00625	9
	7.8812500000000005	6.1		18.1875	12.9
May	8.13125	7.6		18.650000000000002	19.5
	7.7437499999999995	7.2		17.60625	25.7
	7.3687499999999995	11.6		17.8375	26.2
	7.25	10.9		18.668749999999996	23.8
	7.73125	17.1		18.787499999999998	29.7
	9.174999999999999	7.3		20.087500000000002	17.3
	10.331249999999997	3.3		21.48125	16.8
	10.125	4.5		20.181250000000002	22.9
	9.243749999999999	6.9		20.33125	23.1
	9.381250000000001	10.4		20.406249999999996	13.9
	9.90625	12.5		21.3	21.4
	12.19375	11.9		22.043750000000003	32.5
	11.25	14.1		21.612499999999997	24.1
	11.51875	10.6		21.812500000000004	18.2
	12.081249999999999	9.5		21.76875	18.2
	11.825	8.7		23.637499999999996	21.5
	11.2625	8.3		21.81875	23.2
	10.981250000000001	8.4		20.487500000000004	22.4
	10.618750000000002	9.2		21.306250000000006	26.5
	10.50625	11		19.937500000000004	31.4
	10.275	14.1		20.862499999999997	30.3
	11.1625	15.6		20.143749999999997	32.3
	11.312499999999998	17.8		20.924999999999997	22.7
	11.987499999999999	14.9		21.737499999999997	19.1
	12.425	11.6		21.94375	27.8
	12.025	13		21.26875	31.8
	11.6875	18.7		21.468750000000004	27
	11.71875	19.5		21.40625	32.2
	12.768749999999999	18.7		21.8875	29.7
	12.112499999999999	15.7		20.90625	28
	11.15625	16.7		19.75	22.1
Jun.	11.037499999999998	12		22.71875	17.8
	11.918750000000001	9.8		22.775000000000002	25.3
	12.306249999999997	12.5		23.6375	26
	13.9	15.8		24.69375	23.5
	13.45	15.1		24.2	19.5
	13.53125	14		24.9125	21.5
	14.88125	14.2		25.08125	23.9
	14.868750000000004	12.9		25.293750000000003	25
	15.087499999999999	13.4		24.937500000000004	24.7
	15.65	13.4		25.012499999999996	26.6
	15.100000000000001	15.1		24.287499999999998	29.1
	14.600000000000001	16.5		24.15625	22.9
	13.94375	14.1		23.54375	28.6
	15.062500000000002	15.2		23.24375	31.2
	14.537500000000001	15		23.450000000000006	33.5
	15.056250000000002	17.4		24.89375	27.1
	15.693749999999996	20.2		25.50625	33
	15.55625	21.6		25.5625	34.1
	15.225000000000001	21.1		25.799999999999997	30.5
	15.537500000000001	19.3		26.86875	28.7
	16.44375	14.2		28.187500000000004	28
	16.993750000000002	15		27.281249999999996	31.1
	16.20625	18.2		25.99375	31.4
	15.993749999999997	18		26.306250000000006	31.3
	15.437499999999998	19.8		25.206250000000004	23.6
	16.168750000000003	16		26.381250000000005	29.3
	16.375000000000004	14.6		26.612499999999997	28.7
	16.2875	14		26.1625	31.6
	16.71875	16.5		26.487500000000004	30.4
	16.843749999999996	22.3		26.987499999999997	35.8
Jul.	16.8125	19.8		27.468749999999996	28.8
	17.099999999999998	16.7		27.381249999999998	28.6
	17.1	12.9		26.937500000000004	27.2
	16.812500000000004	16.3		26.474999999999998	24
	16.75	12.7		26.800000000000004	24.8
	16.55	13.8		27.037500000000005	29.4
	16.487499999999997	17.5		26.1125	25.4
	15.54375	14.1		25.306250000000002	19.5
	16.18125	11		26.174999999999997	26.6
	15.9	13.6		25.15	30.1
	15.8875	13.2		25.2375	30.9
	15.8625	15.5		26	29.4
	16.6375	17.8		26.499999999999996	31.5
	17.01875	19.2		26.287499999999998	22.6
	16.56875	19.5		25.2	22.1
	15.412499999999998	17.9		25.093749999999993	29.2
	15.11875	14.7		25.443749999999998	30.9
	15.6375	18.1		25.243750000000002	29.7
	15.8375	20		25.762499999999992	23.7
	16.5	17.1		26.406250000000004	24.6
	16.837500000000002	14.4		26.081250000000004	29.8
	16.0125	15.4		26.13125	31
	15.76875	17.8		25.906249999999993	31.8
	15.524999999999999	20.6		24.2125	30.9
	15.687500000000002	21.2		24.912499999999994	28.7
	15.524999999999997	18.6		26.2	27.3
	16.13125		18.2	25.431250000000006		26.8
	16.393749999999997		14.1	26.05		25.8
	16.63125		12.7	25.33125		24.3
	15.818749999999998		13	25.200000000000003		25.2
	15.331250000000002		11.9	23.9625		20
Aug.	15.46875		8.9	24.1625		23.3
	15.262500000000001		14	25.706250000000004		19.6
	15.34375		13.1	25.099999999999998		22.9
	15.643749999999999		15.6	24.637499999999996		24.5
	15.356250000000001		14.8	24.525000000000002		24.5
	14.737499999999999		14.6	25.468750000000007		25.2
	15.3625		15.6	23.99375		23.9
	15.206249999999999		15.3	23.00625		23.3
	14.456249999999999		14.8	23.4375		24.3
	14.95		15.1	25.481249999999996		25.5
	15.331249999999999		15.4	24.543750000000003		24.5
	15.375		14.6	24.275000000000002		23.9
	14.268750000000002		14.1	23.7		23.3
	14.649999999999999		14.2	23.675		23.1
	14.287500000000001		13.5	23.943750000000005		23.2
	14.2		14	23.356250000000003		23.7
	13.825000000000001		14.1	23.19375		22.6
	14.25		13.5	23.80625		23.9
	14.8625		14.5	24.262500000000003		24.1
	14.731250000000001		14.2	23.5125		24.1
	13.493750000000002		13.7	23.59375		23.4
	13.137500000000001		13	22.66875		22.9
	13.050000000000002		13	22.674999999999997		22.9
	13.593750000000002		13.1	22.724999999999998		22.3
	12.687499999999998		12.5	21.393750000000004		20.5
	11.44375		11.3	20.79375		21.2
	11.156249999999998			21.11875
	12.23125			22.056249999999995
	11.631250000000001			20.868750000000002
	11.8375			20.65
	11.981250000000001			21.337499999999995
Sep.	11.143749999999999			20.506249999999998
	10.793749999999998			19.800000000000004
	10.775			22.18125
	11.3125			21
	10.331249999999999			19.475
	10.1875			20.193749999999998
	10.8375			21.787499999999998
	11.23125			19.506249999999998
	10.793750000000001			20.06875
	10.7625			19.575
	10.681250000000002			20.212500000000002
	10.900000000000002			19.787499999999998
	10.293750000000001			20.374999999999996
	11.374999999999996			19.91875
	10.3125			19.01875
	8.91875			17.075
	9.006250000000001			16.925
	8.19375			16.81875
	8.21875			16.94375
	8.56875			17.625
	8.65			17.575
	9.3			17.225
	8.3875			17.325
	7.499999999999999			15.712499999999999
	6.88125			14.312499999999998
	6.225			15.46875
	7.143750000000001			15.981250000000001
	6.306249999999999			15.250000000000002
	6.900000000000001			14.512500000000001
	7.462500000000001			15.143749999999999
Oct.	6.65625			13.7875
	6.231250000000001			13.24375
	5.4437500000000005			11.418750000000001
	3.9187499999999997			11.49375
	4.5562499999999995			14.337499999999999
	6.0875			13.26875
	5.1375			12.1375
	5.3875			12.500000000000002
	4.79375			11.6875
	4.512500000000001			12.337499999999999
	4.0249999999999995			10.7
	4.40625			10.09375
	4.06875			10.118749999999999
	2.4999999999999996			9.5625
	2.1187500000000004			8.975000000000001
	2.03125			8.45625
	2.59375			8.56875
	2.4125			9.125
	1.7249999999999996			8.79375
	1.54375			8.200000000000001
	0.9375			7.687499999999999
	1.56875			8.84375
	2.5624999999999996			10.25
	1.4125			9.3875
	0.26875000000000004			7.09375
	0.8500000000000001			7.793749999999998
	-0.08124999999999982			7.1875
	-0.4312499999999999			6.262500000000001
	-0.08749999999999983			7.575
	-1.39375			5.262499999999999
	-1.2937500000000002			4.5249999999999995
Nov.	-1.99375			4.7437499999999995
	-1.8374999999999997			4.90625
	-1.8125000000000002			4.68125
	-3.3500000000000005			3.525
	-2.7187500000000004			3.3187500000000005
	-3.5124999999999993			3.3312500000000003
	-3.9			3.0374999999999996
	-4.1312500000000005			2.2875
	-3.5562499999999995			2.69375
	-3.1374999999999993			3.65
	-2.9499999999999997			3.3000000000000003
	-2.11875			3.1187500000000004
	-2.381249999999999			2.6
	-4.268750000000001			1.28125
	-4.35			1.125
	-4.36875			2.5437499999999993
	-3.275			1.575
	-2.9375000000000004			2.0812500000000003
	-3.5562500000000004			2.0312499999999996
	-4.1937500000000005			0.6499999999999999
	-3.3500000000000005			2.4125
	-4.6187499999999995			1.0500000000000003
	-6.90625			-2.1750000000000003
	-7.137499999999999			-1.475
	-5.08125			0.43749999999999994
	-6.31875			-0.55
	-6.50625			-0.14374999999999982
	-6.787500000000001			-0.9187500000000004
	-7.4			-0.9312499999999999
	-7.068749999999999			-1.5187500000000003
Dec.	-7.21875			-0.44374999999999987
	-8.05			-2.3937499999999994
	-9.2125			-2.4562500000000003
	-8.29375			-2.3312499999999994
	-8.9			-2.0250000000000004
	-9.793749999999998			-2.5875
	-8.13125			-2.6
	-7.268750000000001			-1.55625
	-8.475000000000001			-1.3562500000000002
	-9.01875			-3.2937499999999997
	-8.38125			-3.1125
	-9.14375			-2.3375000000000004
	-9.6875			-3.55
	-8.23125			-0.7375
	-9.3125			-2.6812499999999995
	-10.0375			-3.7812500000000004
	-8.32			-2.439999999999999

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

36°C

Highest Temp

14 Jul. 26

-24°C

Lowest Temp

24 Jan. 26

Seasonal Breakdown

Hottest MonthJuly28.66°C

Coldest MonthJanuary-14.03°C

Wettest MonthMarch14.9mm

Windiest MonthMarch21.6km/h

Ottawa 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 Ottawa historically?

July is historically Ottawa's hottest month, with average maximum temperatures around 26°C. During peak heatwave events, the highest recorded temperatures have reached 37°C on 2025-06-23.

2. What is the coldest month in Ottawa historically?

January is Ottawa's coldest month, with average minimum temperatures around -13°C. The all-time record low of -33°C was recorded on 2023-02-04.

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

Ottawa's average annual rainfall is approximately 1140.2mm, based on records spanning 17 years.

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

Ottawa historically records approximately 194.1 rainy days per year. June has the highest number of rain days at an average of 17.2 days.

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

The all-time highest temperature recorded in Ottawa is 37°C on 2025-06-23.

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

The all-time lowest temperature recorded in Ottawa is -33°C on 2023-02-04.

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

Ottawa experiences its strongest winds during April. The historic gust record of 42.8 kph was recorded on 2018-05-04.

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

Usually, Ottawa's humidity peaks in January at around 89.6% and drops to its lowest in May at approximately 75.8%.

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