Glasgow has a temperate oceanic climate, with mild summers and cool but rarely harsh winters. Temperatures range from 3–4°C in January to 18–20°C in July, with no extreme temperature swings at any time of year. Rain is a constant presence throughout the year — Glasgow is one of Britain’s wettest cities — with approximately 1,100 mm of annual rainfall distributed fairly evenly across the seasons.
The sunniest months are May and June, when daylight extends considerably thanks to the city’s northern latitude. Wind is frequent, particularly in autumn and winter, and can make temperatures feel considerably colder than they actually are.
The hottest months of the year in Glasgow are August and July, when the monthly average temperature reaches 19 °C, while the coldest months of March, December, January and February the thermometer drops up to 1 °C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °C | 5 | 6 | 9 | 12 | 15 | 17 | 19 | 18 | 16 | 13 | 9 | 6 |
| Min °C | 1 | 1 | 2 | 3 | 6 | 9 | 11 | 11 | 9 | 7 | 3 | 2 |
In Glasgow rainiest months of the year are March, December and January during which monthly rainfall average reaches 130 mm. On the other side, driest months are May, August and April when the average rainfall is reduced to 50 mm per month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 130 | 90 | 120 | 50 | 60 | 70 | 70 | 60 | 80 | 110 | 100 | 120 |
| Days | 25 | 22 | 23 | 22 | 19 | 20 | 21 | 21 | 20 | 24 | 24 | 22 |
April, June, July, August and May are sunniest months of the year. During that months, from sunrise to sunset there are 6 total sunshine hours in Glasgow. In November, January and December sunshine hours are reduced to 1.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 1 | 3 | 3 | 5 | 6 | 5 | 5 | 5 | 4 | 3 | 2 | 1 |
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