Climateby Month

Bangor, ME climate by month

NOAA 1991-2020 normals · 115 ft elevation

Summers in Bangor are warm; winters are very cold and snowy. Highs peak at 80°F in July and fall to 28°F in January. Wet days are spread through the year, from about 9 to 13 a month. Normal snowfall is about 75 in a year. The most comfortable time to visit is June and September.

Warmest month
80°F
July normal high
Coldest month
9°F
January normal low
Wet days a year
134
41.7 in of precipitation
Snow a year
74.6 in
normal snowfall

How warm is Bangor?

Normal highs range from 28°F in January to 80°F in July.

0°20°40°60°80° January: normal high 28°F (-2°C), low 9°F (-13°C) 28° 9° February: normal high 31°F (-1°C), low 11°F (-12°C) March: normal high 40°F (4°C), low 21°F (-6°C) April: normal high 53°F (12°C), low 32°F (0°C) May: normal high 66°F (19°C), low 43°F (6°C) June: normal high 75°F (24°C), low 53°F (12°C) July: normal high 80°F (27°C), low 59°F (15°C) 80° 59° August: normal high 79°F (26°C), low 57°F (14°C) September: normal high 71°F (22°C), low 49°F (9°C) October: normal high 58°F (14°C), low 38°F (3°C) November: normal high 46°F (8°C), low 29°F (-2°C) December: normal high 35°F (2°C), low 17°F (-8°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Bangor?

December has the most wet days (about 13); the year brings about 42 in of precipitation.

January: 11 wet days February: 10 wet days March: 11 wet days April: 12 wet days May: 12 wet days June: 12 wet days July: 11 wet days August: 10 wet days September: 9 wet days 9 October: 11 wet days November: 11 wet days December: 13 wet days 13 JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 74.6 in a year, most of it in January.

January: 18.6 in of snow 18.6 February: 17.5 in of snow March: 15.2 in of snow April: 3.7 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.6 in of snow November: 4.3 in of snow December: 14.7 in of snow JFMAMJJASOND

How humid is Bangor?

Muggy days peak in July, at about 4 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 1 muggy days July: 4 muggy days 4 August: 2 muggy days September: 1 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Millinocket Municipal Arpt, 59 mi N of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 8.9 hours in December to 15.5 hours in June.

January: 9.3 hours of daylight February: 10.4 hours of daylight March: 11.9 hours of daylight April: 13.5 hours of daylight May: 14.8 hours of daylight June: 15.5 hours of daylight 15.5 July: 15.2 hours of daylight August: 14.0 hours of daylight September: 12.5 hours of daylight October: 11.0 hours of daylight November: 9.6 hours of daylight December: 8.9 hours of daylight 8.9 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Bangor, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 28°F9°F 3.2 in11 18.6 in 0 9.3 h
February 31°F11°F 2.4 in10 17.5 in 0 10.4 h
March 40°F21°F 3.2 in11 15.2 in 0 11.9 h
April 53°F32°F 3.6 in12 3.7 in 0 13.5 h
May 66°F43°F 3.3 in12 0.0 in 0 14.8 h
June 75°F53°F 3.9 in12 0.0 in 1 15.5 h
July 80°F59°F 3.2 in11 0.0 in 4 15.2 h
August 79°F57°F 3.1 in10 0.0 in 2 14.0 h
September 71°F49°F 3.8 in9 0.0 in 1 12.5 h
October 58°F38°F 4.6 in11 0.6 in 0 11.0 h
November 46°F29°F 3.8 in11 4.3 in 0 9.6 h
December 35°F17°F 3.7 in13 14.7 in 0 8.9 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Bangor

By our comfort score, the best months are June and September.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 230727
Feb 260624
Mar 361717
Apr 53373
May 711480
Jun 751772
Jul 651072
Aug 711562
Sep 731860
Oct 51680
Nov 35179
Dec 240823

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Bangor

The last spring frost typically comes around May 4, and the first fall frost around Oct 4, leaving 152 frost-free days in a typical year.

Frost and freeze dates for Bangor
Typical date1 year in 10
Last spring frost (32°F)May 4after May 17
First fall frost (32°F)Oct 4before Sep 23
Last hard freeze (28°F)Apr 23after May 4
First hard freeze (28°F)Oct 17before Oct 1
Frost-free season152 daysunder 134 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Bangor Intl Airport (USW00014606), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Maine.

Hottest and coldest readings, 1991-2020

The highest reading was 99°F (July 14, 1995); the lowest was -29°F (January 22, 2005).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Bangor

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall, snow depth and frost dates: Bangor Intl Airport (USW00014606), 2.0 mi W of the city center, 148 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Millinocket Municipal Arpt (726196-14610), 59 mi N of the city center, 401 ft (286 ft higher than the city). Hourly observations, 1991-2020.
  • Not available for this location: humidity and wind by hour and cloud cover (no station close enough or similar enough in elevation).

Distances from the city center (USGS). Methodology · Report an error