Best Time to Visit Glasgow
No month in Glasgow combines a mild average temperature (15–28°C) with low rainfall. The driest are June to July and September, with 106–122 mm of rain.
Glasgow weather by month
The wettest month in Glasgow is October with 143 mm of rain, and the warmest is July at an average 14°C. The coolest is January at 3°C.
| Month | Average temperature | Rainfall | Verdict |
|---|---|---|---|
| January | 3°C / 37°F | 137 mm | Cold |
| February | 3°C / 37°F | 102 mm | Cold |
| March | 4°C / 39°F | 94 mm | Cold |
| April | 7°C / 44°F | 76 mm | Cool |
| May | 9°C / 49°F | 92 mm | Cool |
| June | 12°C / 54°F | 106 mm | Driest |
| July | 14°C / 57°F | 122 mm | Driest |
| August | 13°C / 56°F | 137 mm | Cool |
| September | 12°C / 53°F | 106 mm | Driest |
| October | 9°C / 47°F | 143 mm | Cool |
| November | 6°C / 42°F | 134 mm | Cool |
| December | 3°C / 38°F | 131 mm | Cold |
How we pick the best months
- Best: an average temperature of 15–28°C and low rainfall for Glasgow: under 150 mm, and no more than 143 mm, a quarter above Glasgow's median month (never set below 60 mm).
- If no month qualifies, we show the three driest months that average 10–30°C instead.
- Wet: 150 mm of rain or more. Rainy: more than 143 mm. Hot: 29°C or more on average. Cool: under 15°C. Cold: under 5°C.
Averages cover day and night, so afternoons are warmer than the figure shown. Weather is only one reason to pick a month: school holidays, festivals and prices matter too.
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Where these numbers come from
Monthly averages for January 2001 – December 2020 from the NASA POWER project, for the area around Glasgow Airport (GLA) at 55.87, -4.43. The model covers a grid about 50 km across, so a coastal or hilly spot can run a degree or two different. Retrieved 12 September 2026.
The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) Prediction of Worldwide Energy Resource (POWER) Project funded through the NASA Earth Science/Applied Science Program.