Portland, Maine, United States Climate

Weather: 6.16°C/43.09°F, Wind SW at 0 km/h, 96% Humidity, 0% Chance of rain

United States
(Photo by Emma Frances Logan on Unsplash)
Contents

Portland Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Portland has a Humid continental, no dry season, warm summer climate (Classification: Dfb). The district’s yearly temperature is 9.88ºC (49.78ºF) and it is -2.76% lower than United States’s averages. Portland typically receives about 23.62 millimeters (0.93 inches) of precipitation and has 33.9 rainy days (9.29% of the time) annually.

CountryUnited States
CityMaine
Longitude-70.2568189
Latitude43.6590993
Attitude/ElevationNonem (0ft)
Local timeFriday 11:21
Annual high temperature12.31ºC (54.16ºF)
Annual low temperature5.27ºC (41.49ºF)
Average annual precip.23.62mm (0.93in)
Warmest monthJuly (26.26ºC / 79.27ºF)
Coldest MonthJanuary (-6.49ºC / 20.32ºF)
Wettest MonthDecember (29.44mm / 1.16in)
Driest MonthSeptember (13.82mm / 0.54in)
Number of days with rainfall (≥ 1.0 mm)33.9 days (9.29%)
Days with no rain331.1 days (90.71%)
Humidity73.96%

Climate Portland: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)14.0(57.2)16.0(60.8)15.0(59.0)18.0(64.4)27.0(80.6)30.0(86.0)32.0(89.6)32.0(89.6)30.0(86.0)26.0(78.8)20.0(68.0)13.0(55.4)32.0(89.6)
Average high °C (°F)-0.41(31.26)1.46(34.63)4.31(39.76)9.21(48.58)16.22(61.2)21.67(71.01)26.26(79.27)25.15(77.27)21.1(69.98)13.72(56.7)6.61(43.9)2.37(36.27)12.31(54.16)
Daily mean °C (°F)-2.55(27.41)-0.86(30.45)2.01(35.62)6.91(44.44)13.62(56.52)18.98(66.16)23.43(74.17)22.33(72.19)18.28(64.9)11.33(52.39)4.49(40.08)0.57(33.03)9.88(49.78)
Average low °C (°F)-6.49(20.32)-5.08(22.86)-2.28(27.9)2.37(36.27)8.22(46.8)13.26(55.87)17.89(64.2)16.94(62.49)13.27(55.89)7.24(45.03)0.61(33.1)-2.69(27.16)5.27(41.49)
Record low °C (°F)-22.0(-7.6)-16.0(3.2)-14.0(6.8)-4.0(24.8)2.0(35.6)7.0(44.6)12.0(53.6)11.0(51.8)6.0(42.8)-1.0(30.2)-14.0(6.8)-10.0(14.0)-22.0(-7.6)
Average precipitation mm (inches)20.66(0.81)22.46(0.88)24.6(0.97)27.42(1.08)20.35(0.8)24.46(0.96)20.17(0.79)27.68(1.09)13.82(0.54)23.86(0.94)28.55(1.12)29.44(1.16)23.62(0.93)
Average precipitation days (≥ 1.0 mm)2.363.092.733.092.913.093.03.091.823.093.182.452.82
Average relative humidity (%)75.4176.3675.3971.2472.3973.2674.474.8573.0475.0874.0372.0273.96
Mean monthly sunshine hours6.68.258.9110.3912.6913.213.6313.010.617.876.486.679.86

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Portland in recent years.

Portland

Portland Temperature by Month

July
23.43°C | 74.17°F
August
22.33°C | 72.19°F
June
18.98°C | 66.16°F
September
18.28°C | 64.9°F
May
13.62°C | 56.52°F
October
11.33°C | 52.39°F
April
6.91°C | 44.44°F
November
4.49°C | 40.08°F
March
2.01°C | 35.62°F
December
0.57°C | 33.03°F
February
-0.86°C | 30.45°F
January
-2.55°C | 27.41°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature16.0°C (60.8°F)3.61°C (38.5°F)-6.0°C (21.2°F)
Avg Temperature12.0°C (53.6°F)1.14°C (34.05°F)-9.0°C (15.8°F)
Min Temperature4.0°C (39.2°F)-3.36°C (25.95°F)-14.0°C (6.8°F)
Dew PointMaxAverageMin
Dew Point8.0°C (46.4°F)-2.93°C (26.73°F)-15.0°C (5.0°F)
PrecipitationMaxAverageMinSum
Precipitation19.2mm | 0.76in3.19mm | 0.13in0.0mm | 0in89.2mm | 3.51in
Snowdepth11.4mm | 0.45in1.16mm | 0.05in0.0mm | 0in32.4mm | 1.28in
WindMaxAverageMin
Wind23.0kmh | 14.29mph13.39kmh | 8.32mph8.0kmh | 4.97mph
Gust Wind37.0kmh | 22.99mph21.04kmh | 13.07mph13.0kmh | 8.08mph
Sea Level PressureMaxAverageMin
Sea Level Pressure19.2mb3.19mb0.0mb
Portland

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
February° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-02-011 | 33.8-3 | 26.68017 | 10.5629.91 | 10133.5 | 0.14
2018-02-02-5 | 23.0-8 | 17.67619 | 11.8129.88 | 10124.4 | 0.17
2018-02-03-9 | 15.8-15 | 5.06715 | 9.3230.3 | 10260.0 | 0.0
2018-02-042 | 35.6-2 | 28.48123 | 14.2930.12 | 10206.4 | 0.25
2018-02-051 | 33.8-4 | 24.87415 | 9.3229.8 | 10093.7 | 0.15
2018-02-06-3 | 26.6-10 | 14.0649 | 5.5930.36 | 10280.1 | 0.0
2018-02-07-2 | 28.4-6 | 21.28512 | 7.4630.3 | 102619.1 | 0.75
2018-02-08-6 | 21.2-9 | 15.87511 | 6.8430.21 | 10230.0 | 0.0
2018-02-09-5 | 23.0-10 | 14.07514 | 8.730.47 | 10320.1 | 0.0
2018-02-104 | 39.22 | 35.69414 | 8.730.24 | 10244.3 | 0.17
2018-02-112 | 35.61 | 33.89512 | 7.4630.03 | 101719.2 | 0.76
2018-02-121 | 33.8-3 | 26.67515 | 9.3230.24 | 10240.0 | 0.0
2018-02-13-5 | 23.0-10 | 14.06712 | 7.4630.74 | 10410.0 | 0.0
2018-02-142 | 35.6-3 | 26.67818 | 11.1830.21 | 10230.0 | 0.0
2018-02-154 | 39.22 | 35.69011 | 6.8429.8 | 10090.0 | 0.0
2018-02-165 | 41.02 | 35.68811 | 6.8429.65 | 10043.1 | 0.12
2018-02-17-2 | 28.4-7 | 19.47113 | 8.0830.3 | 10260.2 | 0.01
2018-02-182 | 35.6-2 | 28.47911 | 6.8430.18 | 10225.3 | 0.21
2018-02-193 | 37.4-0 | 32.08315 | 9.3230.45 | 10311.2 | 0.05
2018-02-205 | 41.04 | 39.2958 | 4.9730.24 | 10240.2 | 0.01
2018-02-2112 | 53.68 | 46.49012 | 7.4630.21 | 10230.0 | 0.0
2018-02-221 | 33.8-4 | 24.87110 | 6.2130.65 | 10382.9 | 0.11
2018-02-231 | 33.8-5 | 23.06915 | 9.3230.53 | 10341.4 | 0.06
2018-02-246 | 42.81 | 33.87914 | 8.730.09 | 10190.0 | 0.0
2018-02-252 | 35.6-1 | 30.28416 | 9.9430.21 | 102314.1 | 0.56
2018-02-264 | 39.21 | 33.88210 | 6.2130.06 | 10180.0 | 0.0
2018-02-274 | 39.2-2 | 28.47110 | 6.2130.21 | 10230.0 | 0.0
2018-02-287 | 44.61 | 33.87013 | 8.0829.94 | 10140.0 | 0.0

Portland 3 Year Historical Weather Data

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