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Portland, Maine Climate & Temperature

⛺ Portland, Maine has a humid continental climate with severe winters, no dry season, warm summers and strong seasonality (Köppen-Geiger classification: Dfb).warm summer continental climate with no dry season (Dfb)

⛳ Portland, Maine is situated in or near the cool temperate wet forest biome.

🌡️ The mean temperature is 7.4 degrees Celsius (45.3 degrees Fahrenheit). See the temperatures page for a monthly breakdown and the fixed scale graph.

🐬 Average monthly temperatures vary by 26.5 °C (47.7°F). This indicates that the continentality type is continental, subtype subcontinental.

☔ Total annual precipitation averages 1126.3 mm (44.3 inches) which is equivalent to 1126.3 Litres/m² (27.63 Gallons/ft²).

Portland, Maine Climate Graph

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In the winter time records indicate temperatures by day reach 0.5°C (32.8°F) on average falling to -9.9°C (14.2°F) overnight.

In spring time temperatures climb reaching 11.3°C (52.3°F) generally in the afternoon with overnight lows of 1.1°C (34°F).

During summer average high temperatures are 24.6°C (76.3°F) and average low temperatures are 13.2°C (55.8°F).

Come autumn/ fall temperatures decrease achieving average highs of 14.6°C (58.3°F) during the day and lows of 4°C (39.2°F) generally shortly after sunrise.

✨ The longest day of the year is 15:15 long on the 22 of June and the shortest day is 8:44 long on the 21 of December.

🌞 On average there are 2592 hours of sunshine per year. Visit the sunshine and daylight section to check monthly details including how high in the sky the sun reaches each month.

🐇Were you to burrow down through the centre of the Earth from Portland, Maine you would pop up nearest to the climate station at Albany, Western Australia, Australia where you would find a Mediterranean climate.

🌍Portland, Maine, Usa is at 43°38'N, 70°18'W, 19 m (62 ft). Check the location on the map.

Portland, Maine Climate Table

Average Max Temperature °C ( °F)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
-1 (30) 1 (33) 5 (41) 11 (52) 17 (63) 23 (73) 26 (79) 25 (77) 21 (69) 15 (59) 8 (47) 2 (35) 13 (55)
Average Temperature °C ( °F)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
-6 (21) -5 (23) 1 (33) 6 (43) 12 (53) 17 (62) 20 (69) 20 (67) 15 (59) 9 (49) 4 (39) -3 (26) 7 (45)
Average Min Temperature °C ( °F)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
-11 (11) -10 (13) -4 (24) 1 (34) 6 (43) 11 (52) 15 (58) 14 (57) 9 (49) 4 (38) -1 (30) -8 (18) 2 (36)
Average Precipitation mm (in)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
90 (4) 85 (3) 93 (4) 104 (4) 92 (4) 87 (3) 79 (3) 73 (3) 79 (3) 99 (4) 131 (5) 116 (5) 1126 (44)
Number of Wet Days (probability of rain on a day %)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
12 (39) 11 (39) 12 (39) 12 (40) 13 (42) 12 (40) 10 (32) 10 (32) 10 (33) 9 (29) 11 (37) 11 (35) 133 (36)
Average Sunlight Hours/ Day
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
4h 40' 5h 48' 6h 29' 7h 02' 8h 27' 9h 34' 10h 09' 9h 23' 7h 50' 6h 30' 4h 32' 4h 36' 7h 05'
Average Daylight Hours/ Day
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
9h 19' 10h 24' 11h 51' 13h 23' 14h 41' 15h 22' 15h 04' 13h 56' 12h 27' 10h 55' 9h 37' 8h 58' 12h 00'
Percentage of Sunny (Cloudy) Daylight Hours
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
51 (49) 57 (43) 56 (44) 53 (47) 58 (42) 63 (37) 68 (32) 68 (32) 64 (36) 61 (39) 48 (52) 52 (48) 59 (41)
Sun altitude at solar noon on the 21st day (°).
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
26.5 35.9 46.7 58.4 66.6 69.8 66.7 58.3 46.9 35.4 26.3 23 46.7


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