Glasgow climate — normals and trends
Glasgow (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.6 °C and it receives 1,095 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (14.4 °C on average) and the coldest is January (3.5 °C). Rainfall peaks in December.
Glasgow averages 50 frost days, 0 hot days (≥ 30 °C) and 178 rainy days per year.
Glasgow has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 69 to 31 per year over the period.
The hottest day of the period reached 29.8 °C (on 4 August 1975) and the coldest -20.1 °C (on 26 January 1945).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
GlasgowScotland
- coords
- 55.87°, -4.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.6°C
Average daily high
11.5°C
Average daily low
5.6°C
Annual rainfall
1,095mm
Sunshine / day
6.7h
Mean relative humidity
83%
Average peak wind
20.1km/h
Seasonal range
10.9°C
Frost days (< 0 °C)
50 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
178 d/yr
Annual snowfall
33.0 cm
Average feels-like high
8.7 °C
Average feels-like low
2.5 °C
Average peak gust
42.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.46 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
29.8 °C
4 August 1975
Coldest day
-20.1 °C
26 January 1945
Wettest day
60 mm
10 August 2004
Windiest day
65.9 km/h
15 January 1968
Strongest gust
144.0 km/h
28 January 2002
Hottest feels-like
32.6 °C
29 July 1948
Coldest feels-like
-24.7 °C
26 January 1945
Snowiest day
15.6 cm
25 January 1990
Sunniest day
17.0 h
19 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 6.0 °C | +0.4 °C | 57 mm | -44 mm |
| Feb | 7.5 °C | +1.3 °C | 75 mm | -8 mm |
| Mar | 11.2 °C | +2.9 °C | 48 mm | -35 mm |
| Apr | 14.5 °C | +3.7 °C | 38 mm | -34 mm |
| May | 17.3 °C | +3.3 °C | 78 mm | -3 mm |
| Jun | 17.1 °C | +0.7 °C | 98 mm | +19 mm |
| Jul | 19.2 °C | +1.6 °C | 97 mm | +10 mm |
| Aug | 19.3 °C | +1.9 °C | 76 mm | -22 mm |
| Sep | 15.7 °C | +0.5 °C | 108 mm | +11 mm |
| Oct | 12.4 °C | +0.3 °C | 120 mm | +12 mm |
| Nov | 9.4 °C | +1.0 °C | 156 mm | +56 mm |
| Dec | 8.1 °C | +1.7 °C | 147 mm | +39 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Glasgow?
Glasgow has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.6 °C and it receives 1,095 mm of precipitation per year.
What is the hottest day ever recorded in Glasgow?
The hottest day measured in Glasgow between 1940 and 2025 was 4 August 1975, reaching 29.8 °C.
What is the coldest day in Glasgow?
The coldest day measured in Glasgow between 1940 and 2025 was 26 January 1945, at -20.1 °C.
Does it snow in Glasgow?
Yes. Glasgow gets on average 33.0 cm of snow per year and has around 50 frost days.
Has the climate of Glasgow warmed?
Yes: Glasgow warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Glasgow?
The wettest day measured in Glasgow between 1940 and 2025 was 10 August 2004, with 60 mm of rain in 24 hours.
What was the windiest day in Glasgow?
The windiest day measured in Glasgow between 1940 and 2025 was 15 January 1968, with winds reaching 65.9 km/h.
What is the warmest month in Glasgow?
The warmest month in Glasgow is July (14.4 °C on average); the coldest is January (3.5 °C).
How much does it rain in Glasgow?
Glasgow receives on average 1,095 mm of precipitation per year, spread over about 178 rainy days.
Is it sunny in Glasgow?
Glasgow gets on average 6.7 hours of sunshine per day, roughly 2,446 hours per year over 1940-2025.
What is the biggest single-day snowfall in Glasgow?
The heaviest 24-hour snowfall measured in Glasgow between 1940 and 2025 was 25 January 1990, with 15.6 cm.
Are there tropical nights in Glasgow?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Glasgow.
What was the most extreme apparent temperature in Glasgow?
In Glasgow, between 1940 and 2025, the highest apparent temperature reached 32.6 °C on 29 July 1948, and the lowest was -24.7 °C on 26 January 1945.
Compare Glasgow with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Glasgow