Climate Insights for Glasgow

The climate in Glasgow is temperate. The average annual temperature is 14°C and approximately 1080mm of precipitation falls per year. Glasgow receives a notable amount of rainfall throughout the year, including during its driest month. Glasgow is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, February, December, when temperatures can drop to -4°C. Light snow can occur between January and December.

Temperatures in Glasgow vary considerably across the year, with a 35°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 26°C. The coldest month is January, when overnight lows fall to -4°C and the daily average is -1°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.

Glasgow is a moderately rainy area, receiving approximately 1080mm of precipitation annually, which averages out to around 90mm per month. The wettest month is May, averaging 156mm of rainfall. April and June also tend to see above-average precipitation. The driest month is February, with just 49mm. That's 107mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Light snowfall can occur between January and December, totalling around 37cm annually. January is the snowiest month with approximately 13cm.

Glasgow is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 19km/h in winter, 20km/h in spring, 15km/h in summer, 17km/h in autumn.

It is currently spring in Glasgow, which began on March 20, 2026. Glasgow is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 31°C, while the coldest stretch bottoms out in January near -4°C. Summer is next, beginning on June 21, 2026 — 84 days from now.

The best time to visit Glasgow is during September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 61mm per month. By contrast, July can be uncomfortably hot with highs reaching 31°C, while January is the coldest period with lows dropping to -4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Glasgow based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.