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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 sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is a wintry winter month in Chelsea, Massachusetts, with an average temperature ranging between min 22.6°F (-5.2°C) and max 34.2°F (1.2°C). The lowest temperatures are recorded in January, with averages reaching a high of 34.2°F (1.2°C) and a low of 22.6°F (-5.2°C). Weather in January »
Weather in February
February, the last month of the winter in Chelsea, is another cold month, with an average temperature ranging between max 36.5°F (2.5°C) and min 23.5°F (-4.7°C). As Chelsea welcomes February, the average high-temperature stabilizes at a still cold 36.5°F (2.5°C), showing little deviation from January's 34.2°F (1.2°C). Weather in February »
Weather in March
March, the first month of the spring in Chelsea, is a chilly month, with an average temperature fluctuating between 30.9°F (-0.6°C) and 43.5°F (6.4°C). With the onset of March, Chelsea experiences a subtle temperature shift, with the average high-temperature moving from a cold 36.5°F (2.5°C) in February to a chilly 43.5°F (6.4°C). Weather in March »
Weather in April
April is a fresh spring month in Chelsea, Massachusetts, with an average temperature ranging between max 55.2°F (12.9°C) and min 40.5°F (4.7°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's chilly 43.5°F (6.4°C) to a fresh 55.2°F (12.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Chelsea, Massachusetts, with an average temperature fluctuating between 66.4°F (19.1°C) and 50°F (10°C). A rise in the average high-temperature is observed during May, moving from a fresh 55.2°F (12.9°C) in April to a comfortable 66.4°F (19.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Chelsea, Massachusetts, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 74.3°F (23.5°C). June's onset brings a subtle temperature rise, moving from a comfortable 66.4°F (19.1°C) in May to a moderately hot 74.3°F (23.5°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Chelsea, Massachusetts, with an average temperature ranging between max 81.7°F (27.6°C) and min 64.9°F (18.3°C). The highest temperatures are recorded in July, with averages reaching a high of 81.7°F (27.6°C) and a low of 64.9°F (18.3°C). Throughout July, the heat index is evaluated at a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Chelsea, is also a moderately hot month, with an average temperature varying between 64°F (17.8°C) and 80.4°F (26.9°C). The commencement of August records an average high-temperature of a still moderately hot 80.4°F (26.9°C), barely varying from July's 81.7°F (27.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Chelsea, Massachusetts, with temperature in the range of an average high of 72.7°F (22.6°C) and an average low of 57.4°F (14.1°C). In Chelsea, the average high-temperature in September gently drops from a moderately hot 80.4°F (26.9°C) in August to an agreeable 72.7°F (22.6°C). Weather in September »
Weather in October
October, like September, in Chelsea, Massachusetts, is another enjoyable autumn month, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 61.5°F (16.4°C). Chelsea's weather in October involves a decrease in the average high-temperature, moving down from September's agreeable 72.7°F (22.6°C) to an enjoyable 61.5°F (16.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Chelsea, Massachusetts, with an average temperature fluctuating between 49.5°F (9.7°C) and 37.9°F (3.3°C). The onset of November brings a small change in high-temperatures, falling from an enjoyable 61.5°F (16.4°C) in October to a frosty 49.5°F (9.7°C). Weather in November »
Weather in December
December, the first month of the winter in Chelsea, is also an icy month, with temperature in the range of an average low of 29.7°F (-1.3°C) and an average high of 39.9°F (4.4°C). December brings a decrease in the average high-temperature, shifting from a chilly 49.5°F (9.7°C) in November to a cold 39.9°F (4.4°C). Weather in December »
Updated: Jun 15, 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?
Chelsea experiences its lowest temperatures in January, with an average peak of 34.2°F (1.2°C) and a low of 22.6°F (-5.2°C).
How many days does it rain?
In Chelsea, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
In Chelsea, during the entire year, snow falls for 29.8 days and aggregates up to 15.75" (400mm) of snow.
What is the month with the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What is the most humid month in Chelsea?
With an average relative humidity of 77%, February is the most humid month.
What is the snowiest month?
The month with the most snowfall in Chelsea is February, when snow falls for 7.6 days and typically aggregates up to 4.72" (120mm) of snow.
What is the month with the coldest ocean?
The month with the coldest seawater is February, with an average ocean temperature of 38.1°F (3.4°C).
What is the month with the least sunshine?
The month with the least sunshine is February, with an average of 4.6h of sunshine.
What is the rainiest month?
The months with the most rainfall are March, April and December, with an average 2.91" (74mm) of precipitation.
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 69%.
When it does not snow?
In Chelsea, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year in Chelsea, 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.
What month is the hottest?
July is the month when Chelsea's temperatures reach their peak, with averages of 81.7°F (27.6°C) and lows of 64.9°F (18.3°C).
What month is the ocean warmest?
The month with the warmest seawater is August, with an average ocean temperature of 68°F (20°C).
What month has the most sunshine in Chelsea?
August has the most sunshine of the year, with an average of 10.5h of sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 10 days and typically collects 1.26" (32mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 6min of daylight.
Average temperature
Chelsea, MA
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure
Chelsea, MA
- Average pressure in January:
30"Hg - Average pressure in February:
29.98"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:
29.94"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:
30.06"Hg - Average pressure in December:
30.03"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Chelsea, MA
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.4mph - Average wind speed in April:
8.6mph - Average wind speed in May:
7.4mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.8mph - Average wind speed in October:
8.3mph - Average wind speed in November:
8.8mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Chelsea, MA
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall
Chelsea, MA
- Average rainfall in January:
2.28" - Average rainfall in February:
2.24" - Average rainfall in March:
2.91" - Average rainfall in April:
2.91" - Average rainfall in May:
1.81" - Average rainfall in June:
2.13"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.61" - Average rainfall in September:
1.26" - Average rainfall in October:
2.56" - Average rainfall in November:
2.68" - Average rainfall in December:
2.91"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days
Chelsea, MA
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
8.2 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
13.6 days
- Average rainfall days in July:
14.7 days - Average rainfall days in August:
11.7 days - Average rainfall days in September:
10 days - Average rainfall days in October:
13.3 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
10.1 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall
Chelsea, MA
- Average snowfall in January:
2.76" - Average snowfall in February:
4.72" - Average snowfall in March:
3.86" - Average snowfall in April:
0.79" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Chelsea, MA
- Average snowfall days in January:
7.6 days - Average snowfall days in February:
7.6 days - Average snowfall days in March:
6.8 days - Average snowfall days in April:
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:
1.4 days - Average snowfall days in December:
5.2 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature
Chelsea, MA
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight / Average sunshine
Chelsea, 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:
5h and 1min - Average sunshine in February:
4h and 4min - Average sunshine in March:
5h and 4min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 3min - Average sunshine in September:
8h and 2min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
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 36min).
Average sunshine days
Chelsea, MA
- Average sunshine days in January:
17.5 days - Average sunshine days in February:
14.2 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
14.2 days - Average sunshine days in June:
14.8 days
- Average sunshine days in July:
15.3 days - Average sunshine days in August:
17 days - Average sunshine days in September:
17.7 days - Average sunshine days in October:
15.7 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index
Chelsea, 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
Chelsea, MA
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Chelsea, MA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Chelsea, Massachusetts, USA
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