Glasgow Weather in September

What's the weather like in Glasgow (Montana) in September 2025?

The climate in Glasgow during September can be summarized as mild and dry.

September is in the fall / autumn in Glasgow and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 6°C (44°F) is normal.

Glasgow weather averages (imperial / metric)
Daytime temperature	21.2°C 70.2°F
Nightly temperature	6.4°C 43.5°F
Average temperature	13.8°C 56.8°F
Daily sunshine	8.4 hrs
Avg rainfall	26 mm 1 ins
Rainy days	6 days
Sea temperature	13.2°C 55.8°F
Humidity	55%
Windspeed	18.4kph 11 mph

On average September is the 5th wettest month of the year in Glasgow with around 26mm 1 inches of rain making it a dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.4 hours of sunshine per day.

September temperatures in Glasgow

Glasgow average temperature in September

September rainfall

September hourly sunshine

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Glasgow in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Glasgow weather stats

Glasgow weather statistics
Hottest month:	July	28.9°C 84°F
Driest month:	February	7mm 0.3ins
Sunniest month:	July	12.6hrs
Coldest month:	January	-7.1°C 19.2°F
Wettest month:	June	55mm 2.2ins

Map showing location of Glasgow (48.19696, -106.63671)