Climate and monthly weather forecastWellesley, MA
Climate and monthly weather forecast
Weather in January
January, like December, in Wellesley, Massachusetts, is another cold winter month, with an average temperature varying between 33.1°F (0.6°C) and 21.2°F (-6°C). January is the month when Wellesley sees the lowest average temperatures, with a high of 33.1°F (0.6°C) and a low of 21.2°F (-6°C). Weather in January »Weather in February
February, the last month of the winter in Wellesley, is also a wintry month, with an average temperature varying between 21.7°F (-5.7°C) and 36.1°F (2.3°C). The unfolding of February shows an average high-temperature of a still wintry 36.1°F (2.3°C), indicating a slight variance from January's 33.1°F (0.6°C). Weather in February »Weather in March
March, the first month of the spring in Wellesley, is a chilly month, with an average temperature fluctuating between 43.5°F (6.4°C) and 29.1°F (-1.6°C). Wellesley's transition into March brings a slight rise in the average high-temperature, moving from an icy 36.1°F (2.3°C) in February to a chilly 43.5°F (6.4°C). Weather in March »Weather in April
April is a refreshing spring month in Wellesley, Massachusetts, with an average temperature fluctuating between 39.6°F (4.2°C) and 55.9°F (13.3°C). Wellesley in April experiences an increase in the average high-temperature, moving from March's chilly 43.5°F (6.4°C) to a refreshing 55.9°F (13.3°C). Weather in April »Weather in May
May, the last month of the spring in Wellesley, is a comfortable month, with an average temperature varying between 49.1°F (9.5°C) and 67.1°F (19.5°C). Wellesley, Massachusetts, sees an increase in the average high-temperature with the arrival of May, moving from April's 55.9°F (13.3°C) to a still refreshing 67.1°F (19.5°C). Weather in May »Weather in June
June, the first month of the summer in Wellesley, is a moderately hot month, with an average temperature ranging between max 75.2°F (24°C) and min 56.5°F (13.6°C). June comes with a subtle rise, with the average high-temperature adjusting from an enjoyable 67.1°F (19.5°C) in May to a moderately hot 75.2°F (24°C). Weather in June »Weather in July
July, like June, in Wellesley, Massachusetts, is a moderately hot summer month, with an average temperature ranging between min 63.5°F (17.5°C) and max 82.4°F (28°C). The warmest time of the year is July, with temperatures averaging a high of 82.4°F (28°C) and a low of 63.5°F (17.5°C). The heat index value for July is evaluated at a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Wellesley, is another warm month, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 81°F (27.2°C). The arrival of August denotes a barely perceptible change in the average high-temperatures to a still warm 81°F (27.2°C) from July's 82.4°F (28°C). Weather in August »Weather in September
September, the first month of the autumn in Wellesley, is also an agreeable month, with temperature in the range of an average high of 73.2°F (22.9°C) and an average low of 55.8°F (13.2°C). As Wellesley enters September, the average high-temperature subtly lowers from the a moderately hot 81°F (27.2°C) of August to a pleasant 73.2°F (22.9°C). Weather in September »Weather in October
October, the same as September, in Wellesley, Massachusetts, is another mild autumn month, with an average temperature varying between 46.6°F (8.1°C) and 60.6°F (15.9°C). With October's onset, the weather shows a temperature decrease, transitioning from an agreeable 73.2°F (22.9°C) in September to a moderate 60.6°F (15.9°C). Weather in October »Weather in November
November, the last month of the autumn in Wellesley, is another chilly month, with an average temperature varying between 36°F (2.2°C) and 49.1°F (9.5°C). The onset of November introduces a moderate change in Wellesley's weather, with average high-temperatures falling from October's moderate 60.6°F (15.9°C) to a frosty 49.1°F (9.5°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Wellesley, Massachusetts, with an average temperature ranging between min 28.4°F (-2°C) and max 39°F (3.9°C). In Wellesley, the beginning of December is marked by a lowered average high-temperature, shifting from November's chilly 49.1°F (9.5°C) to a wintry 39°F (3.9°C). Weather in December »Updated: Jun 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, with its average high-temperature of 33.1°F (0.6°C) and an average low-temperature of 21.2°F (-6°C), holds the record as the coldest month.
In Wellesley, during the entire year, the rain falls for 141.8 days and collects up to 24.21" (615mm) of precipitation.
Months with snowfall are January through May, October through December.
In Wellesley, during the entire year, snow falls for 28.5 days and aggregates up to 15.91" (404mm) of snow.
The months with the lowest UV index in Wellesley are January through March, November and December, with an average maximum UV index of 2.
The most humid month is February, with an average relative humidity of 79%.
February is the month with the most snowfall. Snow falls for 7 days and accumulates 4.17" (106mm) of snow.
February has the least sunshine of the year, with an average of 4.8h of sunshine.
The month with the most rainfall is March, when the rain falls for 12.2 days and typically aggregates up to 2.4" (61mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
April is the least humid month, with an average relative humidity of 70%.
June through September are months without snowfall.
The month with the longest days in Wellesley is June, with an average of 15h and 12min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
July is the warmest month in Wellesley, exhibiting average temperatures of 82.4°F (28°C) at the peak and 63.5°F (17.5°C) at the base.
The month with the most sunshine in Wellesley is August, with an average of 10.5h of sunshine.
September is the month with the least rainfall. Rain falls for 10.4 days and accumulates 1.18" (30mm) of precipitation.
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average temperature
Wellesley, MA
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.1°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure
Wellesley, MA
- Average pressure in January:
30.01"Hg - Average pressure in February:
29.99"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Wellesley, MA
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.7mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.1mph - Average wind speed in May:
6.9mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.3mph - Average wind speed in November:
7.7mph - Average wind speed in December:
8.3mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity
Wellesley, MA
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall
Wellesley, MA
- Average rainfall in January:
1.93" - Average rainfall in February:
1.89" - Average rainfall in March:
2.4" - Average rainfall in April:
2.36" - Average rainfall in May:
1.85" - Average rainfall in June:
2.13"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.73" - Average rainfall in September:
1.18" - Average rainfall in October:
2.17" - Average rainfall in November:
2.32" - Average rainfall in December:
2.36"
The wettest month (with the highest rainfall) is March (2.4").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days
Wellesley, MA
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
12.2 days - Average rainfall days in April:
14.2 days - Average rainfall days in May:
14.7 days - Average rainfall days in June:
14.7 days
- Average rainfall days in July:
15.6 days - Average rainfall days in August:
13 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
12.7 days - Average rainfall days in November:
9.6 days - Average rainfall days in December:
9.6 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is January (7.3 days).
Average snowfall
Wellesley, MA
- Average snowfall in January:
2.68" - Average snowfall in February:
4.17" - Average snowfall in March:
3.7" - Average snowfall in April:
0.94" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Wellesley, MA
- Average snowfall days in January:
7.2 days - Average snowfall days in February:
7 days - Average snowfall days in March:
6.5 days - Average snowfall days in April:
1.1 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
5.3 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Wellesley, MA
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
5h and 6min - Average sunshine in February:
4h and 48min - Average sunshine in March:
5h and 54min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 12min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 30min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 36min - Average sunshine in December:
5h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days
Wellesley, MA
- Average sunshine days in January:
17.4 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
13.6 days - Average sunshine days in April:
13.2 days - Average sunshine days in May:
14.4 days - Average sunshine days in June:
13.5 days
- Average sunshine days in July:
13.9 days - Average sunshine days in August:
15.9 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
15.8 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
16.6 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is April (13.2 days).
Average UV index
Wellesley, MA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Wellesley, MA
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Wellesley, MA
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
