Clair, Canada — Weather in September 2026

Monthly climate averages for Clair, Canada. Based on 10-year ERA5 reanalysis data.

Dfb Warm-Summer Continental
7.2 /10
Good

September is a good month in Clair

Climate Overview

Clair, Canada in September has mild conditions, with highs averaging 19.4°C (67°F) and noticeably cooler mornings.

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 21°C (71°F) at the start to 17°C (63°F) by month's end.

September sees fairly even rainfall, totalling about 73 mm across the month.

Expect around 9.8h of sunshine at the start of September, decreasing to 7.9h by the end.

The warmest days tend to fall around the 4th, averaging 21.7°C (71°F).

Compared to August, this month is about 4°C cooler with 3 fewer rainy days. Temperatures begin dropping heading into October.

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Monthly September Averages

Temperature
19°C / 11°C
Feels Like
19°C / 9°C
Rain
9 days · 73 mm
Sunshine
8.6h / day
Humidity
76% — Humid
Wind
15 km/h
Wind Direction
W (264°)
Gusts
37 km/h
Daylight
12.5 h
Cloud Cover
55%
Clear Sky Days
5.7
UV Index
4.6 — Moderate
Dew Point
11°C — Comfortable
Moon Phase
Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

28°C 24°C 20°C 16°C 12°C 8°C 4°C 151015202530
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 151015202530
Rainfall

Daily Sunshine

0h 3h 6h 9h 12h 151015202530
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202530
Wind Speed
Sun Position
Sunrise 07:13
Daylight 12.6h
Sunset 19:49

Compare Months

January
Poor
Temp
-6°C / -14°C
Feels Like
-10°C / -19°C
Rain
11days (83 mm) Wet
Sun
5.1h Fair
Humidity
78% Humid
UV
1.8 Low
Snow Days
16days
View Details
February
Poor
Temp
-4°C / -13°C
Feels Like
-9°C / -19°C
Rain
11days (72 mm) Wet
Sun
6.6h Fair
Humidity
75% Muggy
UV
2.7 Moderate
Snow Days
16days
View Details
March
Poor
Temp
1°C / -8°C
Feels Like
-4°C / -13°C
Rain
12days (92 mm) Wet
Sun
7.5h Good
Humidity
74% Muggy
UV
3.5 Moderate
Snow Days
15days
View Details
April
Poor
Temp
7°C / -2°C
Feels Like
4°C / -6°C
Rain
12days (92 mm) Wet
Sun
8.2h Good
Humidity
72% Muggy
UV
4.5 Moderate
Snow Days
9days
View Details
May
Fair
Temp
16°C / 6°C
Feels Like
14°C / 3°C
Rain
13days (94 mm) Wet
Sun
9.4h Good
Humidity
68% Muggy
UV
5.3 High
Snow Days
1days
View Details
June best
Excellent
Temp
22°C / 12°C
Feels Like
21°C / 11°C
Rain
14days (109 mm) Wet
Sun
10.5h Excellent
Humidity
73% Muggy
UV
5.8 High
View Details
July best
Excellent
Temp
25°C / 16°C
Feels Like
26°C / 16°C
Rain
14days (105 mm) Wet
Sun
11.4h Excellent
Humidity
76% Humid
UV
6.4 High
View Details
August best
Excellent
Temp
23°C / 15°C
Feels Like
24°C / 15°C
Rain
12days (96 mm) Wet
Sun
10.1h Excellent
Humidity
76% Humid
UV
5.5 High
View Details
September best
Good
Temp
19°C / 11°C
Feels Like
19°C / 9°C
Rain
9days (73 mm) Wet
Sun
8.6h Good
Humidity
76% Humid
UV
4.6 Moderate
View Details
October
Fair
Temp
13°C / 5°C
Feels Like
10°C / 2°C
Rain
11days (104 mm) Wet
Sun
6.3h Fair
Humidity
77% Humid
UV
2.9 Moderate
Snow Days
2days
View Details
November
Poor
Temp
4°C / -3°C
Feels Like
0°C / -7°C
Rain
12days (94 mm) Wet
Sun
5h Fair
Humidity
77% Humid
UV
1.8 Low
Snow Days
13days
View Details
December
Poor
Temp
-3°C / -11°C
Feels Like
-7°C / -16°C
Rain
11days (96 mm) Wet
Sun
4.5h Fair
Humidity
79% Humid
UV
1.4 Low
Snow Days
14days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January -6°C / -14°C -10°C / -19°C 11days (83 mm) Wet 5.1h Fair 78% Humid 1.8 Low Poor View Details
February -4°C / -13°C -9°C / -19°C 11days (72 mm) Wet 6.6h Fair 75% Muggy 2.7 Moderate Poor View Details
March 1°C / -8°C -4°C / -13°C 12days (92 mm) Wet 7.5h Good 74% Muggy 3.5 Moderate Poor View Details
April 7°C / -2°C 4°C / -6°C 12days (92 mm) Wet 8.2h Good 72% Muggy 4.5 Moderate Poor View Details
May 16°C / 6°C 14°C / 3°C 13days (94 mm) Wet 9.4h Good 68% Muggy 5.3 High Fair View Details
June best 22°C / 12°C 21°C / 11°C 14days (109 mm) Wet 10.5h Excellent 73% Muggy 5.8 High Excellent View Details
July best 25°C / 16°C 26°C / 16°C 14days (105 mm) Wet 11.4h Excellent 76% Humid 6.4 High Excellent View Details
August best 23°C / 15°C 24°C / 15°C 12days (96 mm) Wet 10.1h Excellent 76% Humid 5.5 High Excellent View Details
September best 19°C / 11°C 19°C / 9°C 9days (73 mm) Wet 8.6h Good 76% Humid 4.6 Moderate Good View Details
October 13°C / 5°C 10°C / 2°C 11days (104 mm) Wet 6.3h Fair 77% Humid 2.9 Moderate Fair View Details
November 4°C / -3°C 0°C / -7°C 12days (94 mm) Wet 5h Fair 77% Humid 1.8 Low Poor View Details
December -3°C / -11°C -7°C / -16°C 11days (96 mm) Wet 4.5h Fair 79% Humid 1.4 Low Poor View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Warm evening layerUmbrellaComfortable walking shoes

Frequently Asked Questions

September is typically good for visiting Clair, with average highs of 19°C (67°F) and around 9 rainy days. Clair, Canada in September has mild conditions, with highs averaging 19.4°C (67°F) and noticeably cooler mornings.
Clair typically sees around 9 rainy days in September with 73 mm (2.9 in) of total rainfall. An umbrella should suffice.
Nights in Clair during September are cool at around 11°C (52°F). Bring a jacket or sweater for evenings.
With highs of 19°C (67°F) and lows of 11°C (52°F) in September, we recommend: Warm evening layer, Umbrella, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, September offers some of the best weather conditions in Clair with comfortable temperatures and lower chances of rain.
The average UV index in Clair during September is 5 (moderate). Sunscreen and sunglasses are recommended during midday hours.
Clair gets approximately 13 hours of daylight per day in September, with around 9 hours of sunshine.
Snow is uncommon in Clair during September based on 10-year climate averages.

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