Bangor climate — normals and trends
Bangor (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.5 °C and it receives 1,059 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 August (14.0 °C on average) and the coldest is February (5.5 °C). Rainfall peaks in October.
Bangor averages 2 frost days, 0 hot days (≥ 30 °C) and 183 rainy days per year.
Bangor has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The number of frost days there went from about 4 to 0 per year over the period.
The hottest day of the period reached 21.8 °C (on 2 July 1941) and the coldest -4.4 °C (on 1 March 1947).
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
BangorNorthern Ireland
- coords
- 54.66°, -5.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.5°C
Average daily high
10.9°C
Average daily low
8.0°C
Annual rainfall
1,059mm
Sunshine / day
7.6h
Mean relative humidity
83%
Average peak wind
28.1km/h
Seasonal range
8.5°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
183 d/yr
Annual snowfall
13.1 cm
Average feels-like high
7.6 °C
Average feels-like low
3.9 °C
Average peak gust
43.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.28 · 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
21.8 °C
2 July 1941
Coldest day
-4.4 °C
1 March 1947
Wettest day
55 mm
2 October 1981
Windiest day
74.6 km/h
8 January 2005
Strongest gust
127.8 km/h
13 January 1965
Hottest feels-like
21.9 °C
2 July 1941
Coldest feels-like
-11.1 °C
12 January 1987
Snowiest day
21.4 cm
22 March 2013
Sunniest day
16.9 h
1 July 2025
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 | 7.3 °C | +0.2 °C | 67 mm | -33 mm |
| Feb | 7.8 °C | +0.9 °C | 57 mm | -21 mm |
| Mar | 9.4 °C | +1.6 °C | 25 mm | -52 mm |
| Apr | 11.3 °C | +2.1 °C | 72 mm | +4 mm |
| May | 13.3 °C | +2.0 °C | 58 mm | -12 mm |
| Jun | 15.2 °C | +1.5 °C | 132 mm | +57 mm |
| Jul | 16.5 °C | +1.4 °C | 93 mm | +6 mm |
| Aug | 17.1 °C | +1.6 °C | 60 mm | -32 mm |
| Sep | 15.1 °C | +0.6 °C | 131 mm | +38 mm |
| Oct | 12.8 °C | +0.4 °C | 138 mm | +29 mm |
| Nov | 10.4 °C | +0.8 °C | 162 mm | +58 mm |
| Dec | 8.9 °C | +0.8 °C | 119 mm | +11 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 Bangor?
Bangor has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.5 °C and it receives 1,059 mm of precipitation per year.
What is the hottest day ever recorded in Bangor?
The hottest day measured in Bangor between 1940 and 2025 was 2 July 1941, reaching 21.8 °C.
What is the coldest day in Bangor?
The coldest day measured in Bangor between 1940 and 2025 was 1 March 1947, at -4.4 °C.
Does it snow in Bangor?
Yes. Bangor gets on average 13.1 cm of snow per year and has around 2 frost days.
Has the climate of Bangor warmed?
Yes: Bangor warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bangor?
The wettest day measured in Bangor between 1940 and 2025 was 2 October 1981, with 55 mm of rain in 24 hours.
What was the windiest day in Bangor?
The windiest day measured in Bangor between 1940 and 2025 was 8 January 2005, with winds reaching 74.6 km/h.
What is the warmest month in Bangor?
The warmest month in Bangor is August (14.0 °C on average); the coldest is February (5.5 °C).
How much does it rain in Bangor?
Bangor receives on average 1,059 mm of precipitation per year, spread over about 183 rainy days.
Is it sunny in Bangor?
Bangor gets on average 7.6 hours of sunshine per day, roughly 2,774 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bangor?
The heaviest 24-hour snowfall measured in Bangor between 1940 and 2025 was 22 March 2013, with 21.4 cm.
Are there tropical nights in Bangor?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bangor.
What was the most extreme apparent temperature in Bangor?
In Bangor, between 1940 and 2025, the highest apparent temperature reached 21.9 °C on 2 July 1941, and the lowest was -11.1 °C on 12 January 1987.
Compare Bangor with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bangor