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