Mixed charts — The weather in Glasgow: monthly rainfall and temperatures

The bar chart shows average monthly rainfall in Glasgow, while the line graph gives the city's typical daily high and low temperatures across the year.

Overall, Glasgow is wet all year round, but considerably more so in autumn and winter than in spring and early summer. Temperatures follow a clear seasonal curve, peaking in July and August, and the coldest months are also among the rainiest.

January is the wettest month, with 148 mm, followed closely by October (143 mm) and December (135 mm). After easing to 105 mm in February and 112 mm in March, rainfall drops sharply to 64 mm in April, the lowest figure of the year and well under half the January total. It stays below 75 mm until July, then rises in steady steps of 20 mm through August (93 mm) and September (113 mm) to a second peak in October, staying above 125 mm thereafter.

The average daily maximum climbs from 6°C in January to 19°C in July and August, then declines to 7°C in December. The minimum mirrors this pattern at a lower level, rising from 1°C in January to 11°C in midsummer and returning to 1°C in December, just above freezing. Notably, the two warmest months are not the driest: both are wetter than April.