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Sept-Îles, Quebec climate

Dfb Warm-summer humid continental

Sept-Îles has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 70°F, while the coldest is January averaging around 1°F at night. Precipitation is fairly even year-round, totalling about 39 inches.

☀️ Summers

Mild

Highs near 70°F in July.

❄️ Winters

Bitterly cold

Lows near 1°F in January.

About 174 freezing nights a year

🌧️ Rain

Moderate rainfall

About 39 in of rain a year.

Wettest in October

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

−0.2 °F vs 50 years ago

Temperature & precipitation

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

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Sept-Îles climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	17	20	30	42	54	64	70	69	61	48	36	24
Avg temp (°F)	9	12	22	35	46	56	62	61	53	42	31	18
Avg low (°F)	1	3	13	27	38	48	55	54	46	36	25	11
Precipitation (in)	2.7	2.2	2.4	3.3	2.9	3.1	3.9	3.8	3.8	4.1	3.8	3.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	17	20	30	42	54	64
Avg temp (°F)	9	12	22	35	46	56
Avg low (°F)	1	3	13	27	38	48
Precipitation (in)	2.7	2.2	2.4	3.3	2.9	3.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	70	69	61	48	36	24
Avg temp (°F)	62	61	53	42	31	18
Avg low (°F)	55	54	46	36	25	11
Precipitation (in)	3.9	3.8	3.8	4.1	3.8	3.6

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	13	11	12	11	12	12	12	12	11	13	13	14
Days with high ≥ 90°F (days)	—	—	—	—	—	0.0	0.0	—	—	—	—	—
Days with low ≤ 32°F (days)	29	26	29	23	5	0.0	0.0	—	0.4	9	23	29

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	13	11	12	11	12	12
Days with high ≥ 90°F (days)	—	—	—	—	—	0.0
Days with low ≤ 32°F (days)	29	26	29	23	5	0.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	12	12	11	13	13	14
Days with high ≥ 90°F (days)	0.0	—	—	—	—	—
Days with low ≤ 32°F (days)	0.0	—	0.4	9	23	29

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	63	61	62	64	70	69	70	67	68	74	73	66
Clear days (≤ 30% cloud)	4	4	5	6	3	3	3	3	4	2	2	4
Partly cloudy days (30–70%)	13	12	12	9	9	10	10	12	10	9	10	12
Cloudy days (≥ 70%)	14	12	14	15	18	17	18	16	16	20	18	15
Relative humidity (%)	100	99	98	91	81	81	83	84	85	87	92	98
Wind speed (mph)	2.1	2.4	2.3	1.8	1.1	0.8	0.7	0.8	0.9	1.1	1.2	1.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	63	61	62	64	70	69
Clear days (≤ 30% cloud)	4	4	5	6	3	3
Partly cloudy days (30–70%)	13	12	12	9	9	10
Cloudy days (≥ 70%)	14	12	14	15	18	17
Relative humidity (%)	100	99	98	91	81	81
Wind speed (mph)	2.1	2.4	2.3	1.8	1.1	0.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	70	67	68	74	73	66
Clear days (≤ 30% cloud)	3	3	4	2	2	4
Partly cloudy days (30–70%)	10	12	10	9	10	12
Cloudy days (≥ 70%)	18	16	16	20	18	15
Relative humidity (%)	83	84	85	87	92	98
Wind speed (mph)	0.7	0.8	0.9	1.1	1.2	1.7

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Baie-comeau, a weather station, about 164 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 →