Bangor climate — normals and trends
Bangor (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.9 °C and it receives 1,072 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 (20.0 °C on average) and the coldest is January (-7.2 °C). Rainfall peaks in November.
Bangor averages 144 frost days, 8 hot days (≥ 30 °C) and 125 rainy days per year.
Bangor has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 150 to 138 per year over the period.
The hottest day of the period reached 37.2 °C (on 24 June 2025) and the coldest -32.5 °C (on 7 February 1993).
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
BangorMaine
- coords
- 44.80°, -68.77°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.9°C
Average daily high
11.7°C
Average daily low
2.1°C
Annual rainfall
1,072mm
Sunshine / day
8.4h
Mean relative humidity
73%
Average peak wind
16.9km/h
Seasonal range
27.2°C
Frost days (< 0 °C)
144 d/yr
Hot days (≥ 30 °C)
8 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
152.7 cm
Average feels-like high
9.4 °C
Average feels-like low
-1.1 °C
Average peak gust
39.6 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
13.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.31 · 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
37.2 °C
24 June 2025
Coldest day
-32.5 °C
7 February 1993
Wettest day
126 mm
7 September 2008
Windiest day
51.3 km/h
1 January 1945
Strongest gust
135.4 km/h
16 February 2016
Hottest feels-like
41.5 °C
2 August 1975
Coldest feels-like
-38.2 °C
7 February 1993
Snowiest day
40.9 cm
30 December 1962
Sunniest day
15.0 h
30 May 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 | -2.6 °C | 0.0 °C | 41 mm | -43 mm |
| Feb | -2.0 °C | -1.0 °C | 65 mm | -11 mm |
| Mar | 5.8 °C | +2.0 °C | 115 mm | +26 mm |
| Apr | 11.0 °C | +0.5 °C | 137 mm | +47 mm |
| May | 16.9 °C | -0.4 °C | 103 mm | +16 mm |
| Jun | 23.2 °C | +1.0 °C | 65 mm | -27 mm |
| Jul | 26.8 °C | +1.5 °C | 37 mm | -48 mm |
| Aug | 26.7 °C | +2.2 °C | 49 mm | -32 mm |
| Sep | 22.1 °C | +2.1 °C | 62 mm | -26 mm |
| Oct | 15.9 °C | +2.2 °C | 82 mm | -16 mm |
| Nov | 6.8 °C | 0.0 °C | 70 mm | -34 mm |
| Dec | -1.4 °C | -1.6 °C | 88 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 warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.9 °C and it receives 1,072 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 24 June 2025, reaching 37.2 °C.
What is the coldest day in Bangor?
The coldest day measured in Bangor between 1940 and 2025 was 7 February 1993, at -32.5 °C.
Does it snow in Bangor?
Yes. Bangor gets on average 152.7 cm of snow per year and has around 144 frost days.
Has the climate of Bangor warmed?
Yes: Bangor warmed by +1.4 °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 7 September 2008, with 126 mm of rain in 24 hours.
What was the windiest day in Bangor?
The windiest day measured in Bangor between 1940 and 2025 was 1 January 1945, with winds reaching 51.3 km/h.
What is the warmest month in Bangor?
The warmest month in Bangor is July (20.0 °C on average); the coldest is January (-7.2 °C).
How much does it rain in Bangor?
Bangor receives on average 1,072 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Bangor?
Bangor gets on average 8.4 hours of sunshine per day, roughly 3,066 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 30 December 1962, with 40.9 cm.
Are there tropical nights in Bangor?
Yes: Bangor has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bangor?
In Bangor, between 1940 and 2025, the highest apparent temperature reached 41.5 °C on 2 August 1975, and the lowest was -38.2 °C on 7 February 1993.
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