Amount of Sunshine Massachusetts Gets Each Month

Number of Sunny Days

In these tables, the average numbers of Sunny Days for places in Massachusetts 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 Boston, Massachusetts

	Sunny	Partly Sunny	Total Days With Sun
January	9	7	16
February	8	7	15
March	8	8	16
April	7	8	15
May	6	10	16
June	7	10	17
July	7	12	19
August	9	11	20
September	10	8	18
October	11	8	19
November	8	7	15
December	9	7	16
Annual	98	103	201

Days with clear skies in Worcester, Massachusetts

	Sunny	Partly Sunny	Total Days With Sun
January	9	8	17
February	8	7	15
March	8	8	16
April	7	9	16
May	6	10	16
June	6	11	17
July	6	12	18
August	8	11	19
September	9	9	18
October	10	8	18
November	7	8	15
December	8	8	16
Annual	90	107	197

Amount of Sun

Here's another way to look at how much sunshine Massachusetts 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 Boston, Massachusetts normally has each month or in a year. These totals are the averages calculated for 1961 to 1990.

Amount of sunshine in Boston, Massachusetts

	% Sun	Total Hours
January	53	163
February	56	168
March	57	214
April	56	227
May	58	267
June	63	287
July	65	301
August	65	277
September	63	237
October	60	206
November	50	143
December	52	142
Annual	58	2634