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Bangor, Maine climate

Dfb Warm-summer humid continental

Bangor has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 27°C, while the coldest is January averaging around −13°C at night. Precipitation is fairly even year-round, totalling about 1059 mm. Snowfall is heavy (189 cm of snow per year on average).

☀️ Summers

Warm

Highs near 27°C in July.

About 6 days a year above 32 °C

❄️ Winters

Very cold

Lows near −13°C in January.

About 161 freezing nights a year

🌧️ Rain & snow

Wet

About 1059 mm of rain a year, plus 189 cm of snow.

Snow falls through the winter months

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+0.4 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Bangor climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	−2	0	5	12	19	24	27	26	22	15	8	1
Avg temp (°C)	−8	−6	−1	6	13	18	21	20	16	9	3	−3
Avg low (°C)	−13	−12	−6	0	6	11	15	14	9	3	−2	−8
Precipitation (mm)	81	60	82	92	85	98	80	78	96	116	98	94
Snowfall (cm)	47	44	39	9	—	—	—	—	—	2	11	37

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	−2	0	5	12	19	24
Avg temp (°C)	−8	−6	−1	6	13	18
Avg low (°C)	−13	−12	−6	0	6	11
Precipitation (mm)	81	60	82	92	85	98
Snowfall (cm)	47	44	39	9	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	27	26	22	15	8	1
Avg temp (°C)	21	20	16	9	3	−3
Avg low (°C)	15	14	9	3	−2	−8
Precipitation (mm)	80	78	96	116	98	94
Snowfall (cm)	—	—	—	2	11	37

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	11	10	11	12	12	12	11	10	9	11	11	13
Days with high ≥ 32°C (days)	—	—	—	0.0	0.3	1	2	2	0.4	—	—	—
Days with low ≤ 0°C (days)	30	27	27	16	2	—	—	—	0.7	9	21	29
Days with snowfall ≥ 2.5 cm (days)	5	5	4	1	0.0	—	—	—	—	0.1	1	4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	11	10	11	12	12	12
Days with high ≥ 32°C (days)	—	—	—	0.0	0.3	1
Days with low ≤ 0°C (days)	30	27	27	16	2	—
Days with snowfall ≥ 2.5 cm (days)	5	5	4	1	0.0	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	11	10	9	11	11	13
Days with high ≥ 32°C (days)	2	2	0.4	—	—	—
Days with low ≤ 0°C (days)	—	—	0.7	9	21	29
Days with snowfall ≥ 2.5 cm (days)	—	—	—	0.1	1	4

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	70	67	65	66	68	67	62	57	57	62	67	70
Clear days (≤ 30% cloud)	2	3	5	5	4	4	5	7	8	6	4	3
Partly cloudy days (30–70%)	12	11	11	9	10	10	13	12	10	11	10	11
Cloudy days (≥ 70%)	17	14	15	16	17	16	13	12	12	15	16	18
Relative humidity (%)	92	93	87	81	80	81	82	80	79	81	85	90
Wind speed (m/s)	0.2	0.4	0.3	0.2	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	70	67	65	66	68	67
Clear days (≤ 30% cloud)	2	3	5	5	4	4
Partly cloudy days (30–70%)	12	11	11	9	10	10
Cloudy days (≥ 70%)	17	14	15	16	17	16
Relative humidity (%)	92	93	87	81	80	81
Wind speed (m/s)	0.2	0.4	0.3	0.2	0.1	0.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	62	57	57	62	67	70
Clear days (≤ 30% cloud)	5	7	8	6	4	3
Partly cloudy days (30–70%)	13	12	10	11	10	11
Cloudy days (≥ 70%)	13	12	12	15	16	18
Relative humidity (%)	82	80	79	81	85	90
Wind speed (m/s)	0.1	0.1	0.1	0.1	0.1	0.2

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Bangor Intl AP (NOAA GHCN station USW00014606), about 4 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →