Amount of Sunshine Maine Gets Each Month





Number of Sunny Days

In these tables, the average numbers of Sunny Days for places in Maine are the total days each month or year when the sky is mostly clear. This includes the days when cloud covers up to 30% of the sky during daylight hours.

Partly Sunny Days have cloud covering from 40% to 70% of the sky during the daytime.

Total Days With Sun is a sum of the Sunny plus Partly Sunny days. The rest of the days are mainly overcast, with at least 80% cloud cover. All the numbers are averages, made from years of weather watching

Days with clear skies in Caribou, Maine
  Sunny Partly Sunny Total Days With Sun
January 7 7 14
February 6 6 12
March 7 7 14
April 5 7 12
May 4 9 13
June 3 10 13
July 3 13 16
August 5 11 16
September 5 9 14
October 5 8 13
November 3 6 9
December 6 7 13
Annual 59 100 159
Days with clear skies in Portland, Maine
  Sunny Partly Sunny Total Days With Sun
January 10 7 17
February 9 7 16
March 9 7 16
April 7 7 14
May 6 9 15
June 7 10 17
July 7 11 18
August 9 11 20
September 10 8 18
October 10 8 18
November 7 7 14
December 9 7 16
Annual 101 99 200

Amount of Sun

Here's another way to look at how much sunshine Portland, Maine normally gets. The % Sun numbers measure the percentage of time between sunrise and sunset that sunshine reaches the ground. Again, these amounts are averages based on decades of weather observations.

The Total Hours figures are the average number of sunny hours that Portland normally has each month or in a year. These totals are the averages calculated for 1961 to 1990.

Amount of sunshine in Portland, Maine
  % Sun Total Hours
January 56 165
February 59 173
March 56 205
April 54 214
May 54 243
June 59 259
July 63 282
August 63 268
September 62 229
October 58 196
November 48 139
December 53 141
Annual 57 2513
References

National Climatic Data Center. Comparative Climatic Data.

World Data Center for Meteorology. Climate of the World.

Back to Top