Canada

Banff in September: weather & travel advice

This month's data profile

Rain shapes the decision

Banff in September is climatically mixed. The average daily high is around 12 °C. With about 13 rainy days it is wet.

Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.

Rank among 12 monthly averages

46/100 · #3

Warmth

Dryness

Sun

Published best categories: none

Turquoise mountain lake in Banff National Park

Banff · SeptemberPhoto: Dietmar Rabich · CC BY-SA 4.0

Average high: 12 °C
Average low: 1 °C
Rainy days (est.): 13 rainy days (est.)
Sun (est.): 5 h/day
Humidity: 74 %

Climate evidence with direct month comparison

The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.

Climate averages for Banff: selected and adjacent months
Month	Avg high °C	Avg low °C	Rainy days (est.)	Precipitation mm	Sun h/day (est.)	Humidity %	Wind m/s	Score
August	17	5	13	64	6.5	71	0.3	61
September (selected)	12	1	13	57	4.7	74	0.3	46
October	4	-5	13	52	2.9	83	0.2	30

How do the previous and next months compare?

Baseline: September (46/100)

Positive and negative values show the change from the selected month.

	Score Δ	Average high Δ	Average low Δ	Rainy days Δ	Rain Δ	Sun Δ	Humidity Δ	Wind Δ
August	+15	+4.7 °C	+4.2 °C	+0.1	+6.6 mm	+1.8 h	-3 %	±0 m/s
October	-16	-8.2 °C	-5.9 °C	+0.5	-5.1 mm	-1.8 h	+8.2 %	±0 m/s

All twelve months in context

JanUnsuitable25 FebUnsuitable30 MarUnsuitable22 AprUnsuitable26 MayUnsuitable31 JunUnsuitable38 JulLimited58 AugLimited61 SepLimited46 OctUnsuitable30 NovUnsuitable21 DecUnsuitable23

Rainy days (estimated)

Sunshine hours (estimated)h/day

Average daily high°C

-9

-8

-4

-10

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Where to stay in Banff

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Useful next decisions

Banff · Month by month

Jasper · September Rovaniemi · September Aspen · September Breckenridge · September

Frequently asked questions

How warm is Banff in September?

The average daily high is around 12 °C, with an average daily low of about 1 °C.

Does it rain a lot in Banff in September?

The curated estimate is about 13 rainy days per month, not a directly measured long-term average. Total precipitation averages around 57 mm for the month. A rainy day does not mean all-day rain.

When is the best time to visit Banff?

By the climate score, August are the strongest months for Banff. September is not among them.