Monthly climate guide
Glasgow weather in September
With highs near 14°C (58°F) and lows around 8°C (47°F), September feels cool in Glasgow. Rainfall averages about 106 mm (wet) and the sky is often cloudy. Daytime highs are 2°C cooler than August and 3°C warmer than October.
What stands out in September
- Just 120 km apart, but Glasgow runs about 2°C warmer than Fort William this month.
- There's little difference between day and night (around 6°C).
- Seasonally, September counts as early autumn in Glasgow.
Avg high
14°C
58°F
Avg low
8°C
47°F
Rainfall
106 mm
wet
Humidity
90%
relative
Sky
74%
cloud · often cloudy
Glasgow weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 5°C / 40°F | 1°C / 34°F | 138 mm | 95% | 81% |
| February | 5°C / 41°F | 1°C / 34°F | 117 mm | 94% | 79% |
| March | 7°C / 44°F | 2°C / 35°F | 91 mm | 91% | 77% |
| April | 10°C / 49°F | 3°C / 37°F | 71 mm | 87% | 70% |
| May | 13°C / 55°F | 6°C / 42°F | 93 mm | 84% | 70% |
| June | 16°C / 60°F | 9°C / 47°F | 108 mm | 84% | 79% |
| July | 17°C / 63°F | 10°C / 50°F | 126 mm | 85% | 76% |
| August | 16°C / 61°F | 10°C / 50°F | 137 mm | 88% | 78% |
| September | 14°C / 58°F | 8°C / 47°F | 106 mm | 90% | 74% |
| October | 11°C / 52°F | 6°C / 43°F | 140 mm | 92% | 75% |
| November | 7°C / 45°F | 3°C / 38°F | 133 mm | 95% | 73% |
| December | 6°C / 42°F | 2°C / 36°F | 161 mm | 95% | 82% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Glasgow?
Compare the months in the chart above to find your ideal window.
Best time to visit Glasgow →Other United Kingdom cities in September
Cite or embed this data
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Glasgow weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/uk/glasgow/september
<a href="https://weathercompare.eu/weather/uk/glasgow/september">Glasgow weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/uk/glasgow" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Glasgow weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/uk/glasgow/september">Glasgow weather in September</a> – WeatherCompare</p>
Glasgow in September: quick answers
Is September a good time to visit Glasgow?
September is one of the wetter months in Glasgow, with about 106 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Glasgow in September?
Average highs are about 14°C (58°F) and average lows about 8°C (47°F), based on 10 years of daily data.
Does it rain a lot in Glasgow in September?
Glasgow typically gets around 106 mm of rain in September — wet.
Figures are long-term averages for the area around Glasgow (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.