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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Jefferson, Massachusetts, with temperature in the range of an average high of 30.9°F (-0.6°C) and an average low of 18.9°F (-7.3°C). January, on average, is the coldest month, registering a high temperature of 30.9°F (-0.6°C) and a low of 18.9°F (-7.3°C). Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Jefferson, Massachusetts, with temperature in the range of an average high of 33.6°F (0.9°C) and an average low of 19.8°F (-6.8°C). Jefferson's entry into February measures an average high-temperature of a wintry 33.6°F (0.9°C), closely parallel to the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is also a wintry month in Jefferson, Massachusetts, with an average temperature ranging between max 41.9°F (5.5°C) and min 27.7°F (-2.4°C). March signals a minor shift in the average high-temperature, moving from February's 33.6°F (0.9°C) to a still cold 41.9°F (5.5°C). Weather in March »
Weather in April
April in Jefferson, Massachusetts, is a cool spring month, with an average temperature varying between 37.6°F (3.1°C) and 54.9°F (12.7°C). An increase in the average high-temperature marks April, moving from March's icy 41.9°F (5.5°C) to a fresh 54.9°F (12.7°C). Weather in April »
Weather in May
May, the last month of the spring in Jefferson, is an enjoyable month, with an average temperature ranging between max 66.9°F (19.4°C) and min 47.7°F (8.7°C). The transition to May introduces an increase in the average high-temperature, shifting from a fresh 54.9°F (12.7°C) in April to a comfortable 66.9°F (19.4°C). Weather in May »
Weather in June
June, the first month of the summer in Jefferson, is a moderately hot month, with an average temperature fluctuating between 73.9°F (23.3°C) and 55°F (12.8°C). June's onset witnesses a minor shift in the average high-temperature, moving from a comfortable 66.9°F (19.4°C) in May to a warm 73.9°F (23.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Jefferson, Massachusetts, with an average temperature ranging between max 81.1°F (27.3°C) and min 61.7°F (16.5°C). With average high and low temperatures of 81.1°F (27.3°C) and 61.7°F (16.5°C) respectively, July is Jefferson's warmest month. The heat index value during July is estimated at a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Jefferson, is also a moderately hot month, with an average temperature ranging between max 79°F (26.1°C) and min 60.4°F (15.8°C). The average high-temperature during August registers at a still warm 79°F (26.1°C), maintaining a close resemblance to the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Jefferson, Massachusetts, with an average temperature ranging between max 71.4°F (21.9°C) and min 53.6°F (12°C). September's onset brings a negligible change in high-temperatures, falling from a moderately hot 79°F (26.1°C) in August to an agreeable 71.4°F (21.9°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Jefferson, Massachusetts, with temperature in the range of an average high of 58.6°F (14.8°C) and an average low of 44.6°F (7°C). During Jefferson's transition into October, the average high-temperature lessens, moving from an agreeable 71.4°F (21.9°C) in September to a moderate 58.6°F (14.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Jefferson, Massachusetts, with an average temperature varying between 46.8°F (8.2°C) and 34.2°F (1.2°C). November indicates a shift in the average high-temperature, from October's mild 58.6°F (14.8°C) to a chilly 46.8°F (8.2°C). Weather in November »
Weather in December
December, the first month of the winter in Jefferson, is also a wintry month, with an average temperature fluctuating between 25.9°F (-3.4°C) and 36.5°F (2.5°C). With December's arrival, Jefferson's weather changes as the average high-temperature falls from a frosty 46.8°F (8.2°C) in November to a wintry 36.5°F (2.5°C). Weather in December »
Updated: Jun 22, 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
What is the coldest month?
Jefferson's coldest month, January, registers temperatures that range from a high of 30.9°F (-0.6°C) to a low of 18.9°F (-7.3°C).
How much does it rain?
Throughout the year, there are 146.1 rainfall days, and 28.94" (735mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall.
How many days does it snow?
In Jefferson, during the entire year, snow falls for 39.9 days and aggregates up to 24.45" (621mm) of snow.
What are the months with the lowest UV index?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the most humid month?
February is the most humid month in Jefferson, with an average relative humidity of 81%.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 9.7 days and accumulates 6.06" (154mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is February, with an average of 4.5h of sunshine.
When is Daylight Saving Time (DST)?
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.
What is the least humid month?
April is the least humid month, with an average relative humidity of 72%.
When it does not snow?
In Jefferson, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Jefferson, Massachusetts.
What part of the year is the hottest in Jefferson?
The warmest time of the year is July, with temperatures averaging a high of 81.1°F (27.3°C) and a low of 61.7°F (16.5°C).
What is the month with the most sunshine?
The months with the most sunshine are July and August, with an average of 10h of sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 13.1 days and typically collects 1.69" (43mm) of precipitation.
What is the wettest month?
The month with the most rainfall is December, when the rain falls for 9.1 days and typically aggregates up to 2.76" (70mm) of precipitation.
What is the month with the shortest days in Jefferson?
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Jefferson, MA
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.9°F).
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Jefferson, MA
- Average pressure in January:
30.01"Hg - Average pressure in February:
30"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:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.06"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 (29.93"Hg).
Average wind speed
Jefferson, MA
- Average wind speed in January:
9.1mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.7mph - Average wind speed in April:
8.2mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6mph - Average wind speed in October:
7.5mph - Average wind speed in November:
8.1mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
Jefferson, MA
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall
Jefferson, MA
- Average rainfall in January:
2.17" - Average rainfall in February:
2.01" - Average rainfall in March:
2.56" - Average rainfall in April:
2.64" - Average rainfall in May:
2.32" - Average rainfall in June:
2.48"
- Average rainfall in July:
2.52" - Average rainfall in August:
2.4" - Average rainfall in September:
1.69" - Average rainfall in October:
2.68" - Average rainfall in November:
2.72" - Average rainfall in December:
2.76"
The wettest month (with the highest rainfall) is December (2.76").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days
Jefferson, MA
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
15.5 days
- Average rainfall days in July:
16.2 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
13.1 days - Average rainfall days in October:
13.8 days - Average rainfall days in November:
9.3 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is May (16.3 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall
Jefferson, MA
- Average snowfall in January:
4.41" - Average snowfall in February:
6.06" - Average snowfall in March:
5.24" - Average snowfall in April:
1.73" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Jefferson, MA
- Average snowfall days in January:
8.9 days - Average snowfall days in February:
9.7 days - Average snowfall days in March:
8.5 days - Average snowfall days in April:
2.3 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:
0.5 days - Average snowfall days in November:
3.1 days - Average snowfall days in December:
6.8 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Jefferson, MA
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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:
4h and 5min - Average sunshine in February:
4h and 3min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Jefferson, MA
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
13.4 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
12.9 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
14.4 days - Average sunshine days in November:
17.8 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (12.8 days).
Average UV index
Jefferson, 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
Jefferson, MA
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility
Jefferson, MA
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
Jefferson, Massachusetts, USA
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