Weather in Glasgow in September 2025
Average weather
Average temperature in Glasgow in September
The expected average maximum temperature in September is +18°C with a maximum of +28°C and a minimum of +4°C.
The average maximum temperature goes down 12% by the end of the month, compared with the beginning of the month, from +17°C to +14°C.
Is Glasgow warm or cold in September?
Glasgow is typically mild in September.
Maximum temperatures go down compared to the previous month from +18°C to +16°C. The minimum temperature also goes down from +11°C to +9°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Glasgow:
Climate in Glasgow in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +18°C | +16°C | +13°C | ||||
| Min. temperature | ||||||
| +2°C | -2°C | -7°C | ||||
| Max. temperature | ||||||
| +28°C | +28°C | +20°C | ||||
| Rainfall | ||||||
| 109 mm | 101 mm | 133 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 80% | 82% | 84% | ||||
| Air pressure | ||||||
| 1012 HPa | 1012 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 1 | 2 | 1 | ||||
| Cloudy days | ||||||
| 8 | 9 | 8 | ||||
| Rainy days | ||||||
| 21 | 19 | 21 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +18°C in the day, the average maximum temperature lowers to +16°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 109 mm to 101 mm. Humidity rises from 80% to 82%. The average wind speed doesn’t change much during September, staying around 3 m/s. The good news is there are likely to be more sunny days in September, from 1 to 2.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Glasgow is gradually decreasing during September, going from 4 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Glasgow?
Climate Change over Years
The climate in Glasgow in September has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+11°C) and the highest in 2022 (+13°C). The driest year was 2001 with only 882 mm of rainfall, and the wettest year was 2022 with 1696 mm.
FAQ
Is September a good time to visit Glasgow?
Can you sunbathe in Glasgow in September?
Is Glasgow rainy in September?
Is it sunny in Glasgow in September?
Other cities in United Kingdom
Monthly weather in Glasgow
Source of the data
For this page, we’ve looked at the typical weather in Glasgow, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.