Banff, Canada — Weather in May 2027

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

Dfb Warm-Summer Continental
5 /10
Fair

May is a fair month in Banff

Climate Overview

Banff, Canada in May has mild conditions, with highs averaging 12.2°C (54°F) and noticeably cooler mornings. Rain falls on about 14 days this month.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 11°C (52°F) at the start to 16°C (60°F) by month's end.

May sees fairly even rainfall, totalling about 70 mm across the month.

Expect around 12.0h of sunshine at the start of May, increasing to 13.2h by the end.

The warmest days tend to fall around the 30th, averaging 15.9°C (61°F).

Compared to April, this month is about 6°C warmer with 2 more rainy days. Temperatures will rise further into June.

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Monthly May Averages

Temperature
12°C / 3°C
Feels Like
11°C / 0°C
Rain
14 days · 70 mm
Sunshine
12.1h / day
Humidity
73% — Humid
Wind
10 km/h
Wind Direction
WSW (247°)
Gusts
41 km/h
Daylight
15.6 h
Cloud Cover
64%
Clear Sky Days
2.7
UV Index
6.4 — High
Dew Point
3°C — Dry
Moon Phase
Waxing Gibbous · 66%
Snow Days
12 days · 29.5 cm
Frost Days
6 days

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

20°C 16°C 12°C 8°C 4°C 0°C -4°C 151015202531
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 151015202531
Rainfall

Daily Sunshine

0h 4h 8h 12h 16h 151015202531
Sunshine

Daily Wind Speed

0 4 8 12 16 20 151015202531
Wind Speed
Sun Position
Sunrise 05:53
Daylight 15.6h
Sunset 21:27

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

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

Compare Months

January
Poor
Temp
-6°C / -13°C
Feels Like
-10°C / -18°C
Rain
5days (17 mm) Good
Sun
6h Fair
Humidity
83% Humid
UV
1.5 Low
Snow Days
12days
View Details
February
Poor
Temp
-5°C / -14°C
Feels Like
-10°C / -19°C
Rain
8days (31 mm) Wet
Sun
7.4h Good
Humidity
78% Humid
UV
2.5 Moderate
Snow Days
16days
View Details
March
Poor
Temp
1°C / -8°C
Feels Like
-2°C / -12°C
Rain
11days (41 mm) Wet
Sun
9.4h Good
Humidity
75% Muggy
UV
4 Moderate
Snow Days
19days
View Details
April
Poor
Temp
6°C / -3°C
Feels Like
3°C / -7°C
Rain
12days (55 mm) Wet
Sun
10.9h Excellent
Humidity
72% Muggy
UV
5.4 High
Snow Days
19days
View Details
May
Fair
Temp
12°C / 3°C
Feels Like
11°C / 0°C
Rain
14days (70 mm) Wet
Sun
12.1h Excellent
Humidity
73% Muggy
UV
6.4 High
Snow Days
12days
View Details
June best
Wet
Temp
18°C / 7°C
Feels Like
17°C / 5°C
Rain
18days (121 mm) Wet
Sun
12.8h Excellent
Humidity
71% Muggy
UV
6.7 High
Snow Days
4days
View Details
July best
Good
Temp
23°C / 11°C
Feels Like
22°C / 10°C
Rain
16days (99 mm) Wet
Sun
13.3h Excellent
Humidity
66% Muggy
UV
6.8 High
Snow Days
1days
View Details
August best
Excellent
Temp
22°C / 11°C
Feels Like
21°C / 9°C
Rain
14days (83 mm) Wet
Sun
12h Excellent
Humidity
67% Muggy
UV
6.1 High
Snow Days
1days
View Details
September
Fair
Temp
17°C / 6°C
Feels Like
15°C / 4°C
Rain
10days (52 mm) Wet
Sun
10.2h Excellent
Humidity
72% Muggy
UV
4.7 Moderate
Snow Days
6days
View Details
October
Poor
Temp
7°C / -3°C
Feels Like
4°C / -6°C
Rain
9days (45 mm) Wet
Sun
8.2h Good
Humidity
80% Humid
UV
3.1 Moderate
Snow Days
13days
View Details
November
Poor
Temp
-1°C / -9°C
Feels Like
-5°C / -14°C
Rain
9days (38 mm) Wet
Sun
5.9h Fair
Humidity
86% Very Muggy
UV
1.7 Low
Snow Days
16days
View Details
December
Poor
Temp
-8°C / -14°C
Feels Like
-12°C / -19°C
Rain
8days (37 mm) Wet
Sun
5.1h Fair
Humidity
83% Humid
UV
1.2 Low
Snow Days
15days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January -6°C / -13°C -10°C / -18°C 5days (17 mm) Good 6h Fair 83% Humid 1.5 Low Poor View Details
February -5°C / -14°C -10°C / -19°C 8days (31 mm) Wet 7.4h Good 78% Humid 2.5 Moderate Poor View Details
March 1°C / -8°C -2°C / -12°C 11days (41 mm) Wet 9.4h Good 75% Muggy 4 Moderate Poor View Details
April 6°C / -3°C 3°C / -7°C 12days (55 mm) Wet 10.9h Excellent 72% Muggy 5.4 High Poor View Details
May 12°C / 3°C 11°C / 0°C 14days (70 mm) Wet 12.1h Excellent 73% Muggy 6.4 High Fair View Details
June best 18°C / 7°C 17°C / 5°C 18days (121 mm) Wet 12.8h Excellent 71% Muggy 6.7 High Wet View Details
July best 23°C / 11°C 22°C / 10°C 16days (99 mm) Wet 13.3h Excellent 66% Muggy 6.8 High Good View Details
August best 22°C / 11°C 21°C / 9°C 14days (83 mm) Wet 12h Excellent 67% Muggy 6.1 High Excellent View Details
September 17°C / 6°C 15°C / 4°C 10days (52 mm) Wet 10.2h Excellent 72% Muggy 4.7 Moderate Fair View Details
October 7°C / -3°C 4°C / -6°C 9days (45 mm) Wet 8.2h Good 80% Humid 3.1 Moderate Poor View Details
November -1°C / -9°C -5°C / -14°C 9days (38 mm) Wet 5.9h Fair 86% Very Muggy 1.7 Low Poor View Details
December -8°C / -14°C -12°C / -19°C 8days (37 mm) Wet 5.1h Fair 83% Humid 1.2 Low Poor View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

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

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

May is typically fair for visiting Banff, with average highs of 12°C (54°F) and around 14 rainy days. Banff, Canada in May has mild conditions, with highs averaging 12.2°C (54°F) and noticeably cooler mornings. Rain falls
Banff typically sees around 14 rainy days in May with 70 mm (2.8 in) of total rainfall. Pack a waterproof jacket.
Yes, nights in Banff during May are cold, averaging 3°C (37°F). Pack warm layers and a coat for evenings.
With highs of 12°C (54°F) and lows of 3°C (37°F) in May, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.
May is not the most favourable month weather-wise in Banff. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Banff during May is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Banff gets approximately 16 hours of daylight per day in May, with around 12 hours of sunshine.
Yes, Banff typically sees around 12 snow days in May with roughly 30 cm (12 in) of snowfall.

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