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Stittsville, Ontario climate

Dfb Warm-summer humid continental

Stittsville has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 81°F, while the coldest is January averaging around 6°F at night. Around 35 inches of precipitation falls each year, peaking in June (3.9 inches) and easing off in February (1.9 inches). Snowfall is heavy (65 inches of snow per year on average).

☀️ Summers

Warm

Highs near 81°F in July.

❄️ Winters

Very cold

Lows near 6°F in January.

🌧️ Rain & snow

Moderate rainfall

About 35 in of rain a year, plus 65 in of snow.

Snow falls through the winter months

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Stittsville climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	23	26	37	52	67	76	81	78	71	56	42	29
Avg temp (°F)	15	17	28	42	56	65	70	67	60	47	35	23
Avg low (°F)	6	8	19	32	45	54	59	56	49	38	28	16
Precipitation (in)	2.5	1.9	2.2	2.9	2.7	3.9	3.7	3.6	3.3	3.1	2.9	2.6
Snowfall (in)	15.1	13.3	11.4	4.0	0.2	—	—	—	—	1.1	6.1	14.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	23	26	37	52	67	76
Avg temp (°F)	15	17	28	42	56	65
Avg low (°F)	6	8	19	32	45	54
Precipitation (in)	2.5	1.9	2.2	2.9	2.7	3.9
Snowfall (in)	15.1	13.3	11.4	4.0	0.2	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	81	78	71	56	42	29
Avg temp (°F)	70	67	60	47	35	23
Avg low (°F)	59	56	49	38	28	16
Precipitation (in)	3.7	3.6	3.3	3.1	2.9	2.6
Snowfall (in)	—	—	—	1.1	6.1	14.1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	70	64	63	65	65	63	57	57	59	70	73	73
Relative humidity (%)	91	90	82	75	74	75	73	71	72	77	82	89
Wind speed (mph)	2.3	3.0	2.2	0.9	0.2	0.2	0.2	0.2	0.2	0.2	0.3	1.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	70	64	63	65	65	63
Relative humidity (%)	91	90	82	75	74	75
Wind speed (mph)	2.3	3.0	2.2	0.9	0.2	0.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	57	59	70	73	73
Relative humidity (%)	73	71	72	77	82	89
Wind speed (mph)	0.2	0.2	0.2	0.2	0.3	1.1

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Appleton, a weather station, about 17 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →