Coldstream, Canada — Weather in September 2026

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

Cfa Humid Subtropical
8.4 /10
Excellent

September is an excellent month in Coldstream

Climate Overview

Coldstream, Canada in September has warm conditions, with highs averaging 23.2°C (74°F). Temperatures drop noticeably between day and night.

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 28°C (82°F) at the start to 20°C (68°F) by month's end.

Rainfall is heaviest during the last third of the month, while the first third tends to be drier.

Expect around 11.3h of sunshine at the start of September, decreasing to 8.6h by the end.

The warmest days tend to fall around the 1th, averaging 28.2°C (83°F).

Compared to August, this month is about 6°C cooler with 3 more rainy days. Temperatures begin dropping heading into October.

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Monthly September Averages

Temperature
23°C / 12°C
Feels Like
22°C / 12°C
Rain
9 days · 41 mm
Sunshine
9.9h / day
Humidity
65% — Humid
Wind
9 km/h
Wind Direction
S (188°)
Gusts
32 km/h
Daylight
12.6 h
Cloud Cover
53%
Clear Sky Days
4.9
UV Index
4.7 — Moderate
Dew Point
11°C — Comfortable
Moon Phase
Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

36°C 31°C 26°C 21°C 16°C 11°C 6°C 151015202530
HighLow

Daily Precipitation

0 mm 1 mm 2 mm 3 mm 4 mm 151015202530
Rainfall

Daily Sunshine

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

Daily Wind Speed

0 3 6 9 12 15 151015202530
Wind Speed
Sun Position
Sunrise 06:34
Daylight 12.6h
Sunset 19:13

What to Expect

Daytime temperatures around 23°C (74°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

3 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
2°C / -5°C
Feels Like
-1°C / -9°C
Rain
13days (46 mm) Wet
Sun
4.7h Fair
Humidity
80% Humid
UV
1.4 Low
Snow Days
18days
View Details
February
Poor
Temp
3°C / -5°C
Feels Like
0°C / -9°C
Rain
12days (46 mm) Wet
Sun
6.3h Fair
Humidity
75% Muggy
UV
2.3 Moderate
Snow Days
17days
View Details
March
Poor
Temp
8°C / 0°C
Feels Like
5°C / -4°C
Rain
12days (48 mm) Wet
Sun
8.4h Good
Humidity
70% Muggy
UV
3.5 Moderate
Snow Days
14days
View Details
April
Fair
Temp
14°C / 3°C
Feels Like
11°C / 0°C
Rain
11days (46 mm) Wet
Sun
10.4h Excellent
Humidity
63% Muggy
UV
5.1 High
Snow Days
7days
View Details
May
Good
Temp
21°C / 8°C
Feels Like
20°C / 7°C
Rain
12days (54 mm) Wet
Sun
12h Excellent
Humidity
61% Muggy
UV
6 High
Snow Days
1days
View Details
June best
Excellent
Temp
25°C / 12°C
Feels Like
24°C / 11°C
Rain
10days (51 mm) Wet
Sun
12.7h Excellent
Humidity
57% Moderate
UV
6.4 High
View Details
July best
Excellent
Temp
30°C / 16°C
Feels Like
29°C / 16°C
Rain
7days (37 mm) Good
Sun
13.6h Excellent
Humidity
50% Moderate
UV
6.9 High
View Details
August best
Excellent
Temp
30°C / 16°C
Feels Like
29°C / 17°C
Rain
6days (29 mm) Good
Sun
12.3h Excellent
Humidity
52% Moderate
UV
6 High
View Details
September best
Excellent
Temp
23°C / 12°C
Feels Like
22°C / 12°C
Rain
9days (41 mm) Wet
Sun
9.9h Good
Humidity
65% Muggy
UV
4.7 Moderate
View Details
October
Fair
Temp
14°C / 6°C
Feels Like
12°C / 4°C
Rain
11days (62 mm) Wet
Sun
7.3h Good
Humidity
76% Humid
UV
2.8 Moderate
Snow Days
5days
View Details
November
Poor
Temp
7°C / 1°C
Feels Like
4°C / -2°C
Rain
15days (70 mm) Wet
Sun
4.8h Fair
Humidity
82% Humid
UV
1.5 Low
Snow Days
15days
View Details
December
Poor
Temp
2°C / -3°C
Feels Like
-1°C / -6°C
Rain
14days (65 mm) Wet
Sun
4.2h Fair
Humidity
77% Humid
UV
1 Low
Snow Days
20days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 2°C / -5°C -1°C / -9°C 13days (46 mm) Wet 4.7h Fair 80% Humid 1.4 Low Poor View Details
February 3°C / -5°C 0°C / -9°C 12days (46 mm) Wet 6.3h Fair 75% Muggy 2.3 Moderate Poor View Details
March 8°C / 0°C 5°C / -4°C 12days (48 mm) Wet 8.4h Good 70% Muggy 3.5 Moderate Poor View Details
April 14°C / 3°C 11°C / 0°C 11days (46 mm) Wet 10.4h Excellent 63% Muggy 5.1 High Fair View Details
May 21°C / 8°C 20°C / 7°C 12days (54 mm) Wet 12h Excellent 61% Muggy 6 High Good View Details
June best 25°C / 12°C 24°C / 11°C 10days (51 mm) Wet 12.7h Excellent 57% Moderate 6.4 High Excellent View Details
July best 30°C / 16°C 29°C / 16°C 7days (37 mm) Good 13.6h Excellent 50% Moderate 6.9 High Excellent View Details
August best 30°C / 16°C 29°C / 17°C 6days (29 mm) Good 12.3h Excellent 52% Moderate 6 High Excellent View Details
September best 23°C / 12°C 22°C / 12°C 9days (41 mm) Wet 9.9h Good 65% Muggy 4.7 Moderate Excellent View Details
October 14°C / 6°C 12°C / 4°C 11days (62 mm) Wet 7.3h Good 76% Humid 2.8 Moderate Fair View Details
November 7°C / 1°C 4°C / -2°C 15days (70 mm) Wet 4.8h Fair 82% Humid 1.5 Low Poor View Details
December 2°C / -3°C -1°C / -6°C 14days (65 mm) Wet 4.2h Fair 77% Humid 1 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.

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

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

Packing List

UmbrellaSunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

September is typically excellent for visiting Coldstream, with average highs of 23°C (74°F) and around 9 rainy days. Coldstream, Canada in September has warm conditions, with highs averaging 23.2°C (74°F). Temperatures drop noticeably be
Coldstream typically sees around 9 rainy days in September with 41 mm (1.6 in) of total rainfall. An umbrella should suffice.
Nights in Coldstream during September are cool at around 12°C (54°F). Bring a jacket or sweater for evenings.
With highs of 23°C (74°F) and lows of 12°C (54°F) in September, we recommend: Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, September offers some of the best weather conditions in Coldstream with comfortable temperatures and lower chances of rain.
The average UV index in Coldstream during September is 5 (moderate). Sunscreen and sunglasses are recommended during midday hours.
Coldstream gets approximately 13 hours of daylight per day in September, with around 10 hours of sunshine.
Snow is uncommon in Coldstream during September based on 10-year climate averages.

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