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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, in Dennis, Massachusetts, is another cold winter month, with an average temperature varying between 30.4°F (-0.9°C) and 38.3°F (3.5°C). January is the month when Dennis experiences its coldest temperatures, averaging a high of 38.3°F (3.5°C) and a low of 30.4°F (-0.9°C). Weather in January »
Weather in February
February, the last month of the winter in Dennis, is also an icy month, with an average temperature ranging between min 30.7°F (-0.7°C) and max 38.8°F (3.8°C). Dennis's February reports an average high-temperature of a still icy 38.8°F (3.8°C), exhibiting a minor difference from January. Weather in February »
Weather in March
March, the first month of the spring in Dennis, is also an icy month, with an average temperature ranging between max 41.5°F (5.3°C) and min 35.2°F (1.8°C). The arrival of March marks a slight shift to an average high-temperature of a still cold 41.5°F (5.3°C) from February's 38.8°F (3.8°C). Weather in March »
Weather in April
April in Dennis, Massachusetts, is a chilly spring month, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 47.1°F (8.4°C). With the start of April, the average high-temperature marginally shifts from March's icy 41.5°F (5.3°C) to a frosty 47.1°F (8.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderate month in Dennis, Massachusetts, with temperature in the range of an average high of 55.6°F (13.1°C) and an average low of 50.9°F (10.5°C). May's onset brings a minor rise in the average high-temperature, moving from a chilly 47.1°F (8.4°C) in April to a mild 55.6°F (13.1°C). Weather in May »
Weather in June
June, the first month of the summer in Dennis, is a refreshing month, with temperature in the range of an average low of 59.4°F (15.2°C) and an average high of 64°F (17.8°C). Dennis experiences a minor temperature shift with the start of June, with average high-temperatures moving from a mild 55.6°F (13.1°C) in May to a still refreshing 64°F (17.8°C). Weather in June »
Weather in July
July is an agreeable summer month in Dennis, Massachusetts, with an average temperature fluctuating between 72.1°F (22.3°C) and 67.3°F (19.6°C). July's arrival signals a modest temperature shift, moving from an enjoyable 64°F (17.8°C) in June to a pleasant 72.1°F (22.3°C). Weather in July »
Weather in August
The last month of the summer, August, is also an agreeable month in Dennis, Massachusetts, with an average temperature fluctuating between 68.2°F (20.1°C) and 72.5°F (22.5°C). August tends to be the warmest month, with temperatures averaging a daily high of 72.5°F (22.5°C) and a low of 68.2°F (20.1°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a comfortable month in Dennis, Massachusetts, with temperature in the range of an average high of 67.5°F (19.7°C) and an average low of 62.8°F (17.1°C). Dennis signifies an average high-temperature of a comfortable 67.5°F (19.7°C) in September, closely mirroring the 72.5°F (22.5°C) of August. Weather in September »
Weather in October
October, like September, is a moderate autumn month in Dennis, Massachusetts, with an average temperature ranging between min 54.5°F (12.5°C) and max 59.7°F (15.4°C). With the onset of October, the average high-temperature subtly recedes from September's comfortable 67.5°F (19.7°C) to a still refreshing 59.7°F (15.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Dennis, Massachusetts, with an average temperature fluctuating between 44.4°F (6.9°C) and 51.1°F (10.6°C). The arrival of November suggests a slight decrease in the average high-temperature, moving from a mild 59.7°F (15.4°C) in October to a fresh 51.1°F (10.6°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Dennis, Massachusetts, with temperature in the range of an average high of 43.5°F (6.4°C) and an average low of 36.7°F (2.6°C). With the arrival of December, Dennis notices a mild change in the average high-temperature, sliding from November's fresh 51.1°F (10.6°C) to a chilly 43.5°F (6.4°C). Weather in December »
Updated: Jul 17, 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 time of year?
January, having an average high-temperature of 38.3°F (3.5°C) and an average low-temperature of 30.4°F (-0.9°C), is the coldest month.
How many days does it rain?
Throughout the year, there are 129.6 rainfall days, and 13.94" (354mm) of precipitation is accumulated.
When does it snow in Dennis?
January through April and December are months with snowfall.
When does it snow the most?
The months with the most snowfall are January and February, with an average 0.63" (16mm) of accumulated snow.
How much does it snow?
Throughout the year, there are 21.6 snowfall days, and 2.17" (55mm) of snow is accumulated.
What is the month 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.
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 most humid month?
The months with the highest humidity are May through July, with an average relative humidity of 83%.
When it does not snow?
In Dennis, Massachusetts, snow does not fall in May through November.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What are the months with the highest UV index?
The months with the highest UV index are July and August, with an average maximum UV index of 6.
What is the hottest time of year?
The warmest time of the year in Dennis is August, with temperatures averaging a high of 72.5°F (22.5°C) and a low of 68.2°F (20.1°C).
What is the driest month?
August is the month with the least rainfall. Rain falls for 11.3 days and accumulates 0.94" (24mm) of precipitation.
What month has the most sunshine?
The month with the most sunshine is August, with an average of 10.8h of sunshine.
What is the wettest month in Dennis?
October is the month with the most rainfall. Rain falls for 12 days and accumulates 1.89" (48mm) of precipitation.
What is the least humid month?
With an average relative humidity of 74%, November is the least humid month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
What is the month with the least sunshine?
December has the least sunshine of the year, with an average of 4.6h of sunshine.
Average temperature
Dennis, MA
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (38.3°F).
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure
Dennis, MA
- Average pressure in January:
30"Hg - Average pressure in February:
29.98"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.02"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:
30.05"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
Dennis, MA
- Average wind speed in January:
16.4mph - Average wind speed in February:
15.8mph - Average wind speed in March:
16mph - Average wind speed in April:
13.9mph - Average wind speed in May:
12.1mph - Average wind speed in June:
11.2mph
- Average wind speed in July:
10.5mph - Average wind speed in August:
10.4mph - Average wind speed in September:
12.4mph - Average wind speed in October:
14.2mph - Average wind speed in November:
15.5mph - Average wind speed in December:
15.8mph
The windiest month (with the highest average wind speed) is January (16.4mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity
Dennis, MA
The months with the highest relative humidity are May, June and July (83%).
The month with the lowest relative humidity is November (74%).
Average rainfall
Dennis, MA
- Average rainfall in January:
1.02" - Average rainfall in February:
0.98" - Average rainfall in March:
1.02" - Average rainfall in April:
1.26" - Average rainfall in May:
1.14" - Average rainfall in June:
1.1"
The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is August (0.94").
Average rainfall days
Dennis, MA
- Average rainfall days in January:
8.2 days - Average rainfall days in February:
8.1 days - Average rainfall days in March:
9.7 days - Average rainfall days in April:
12 days - Average rainfall days in May:
13.2 days - Average rainfall days in June:
11.5 days
- Average rainfall days in July:
12.9 days - Average rainfall days in August:
11.3 days - Average rainfall days in September:
9.4 days - Average rainfall days in October:
12 days - Average rainfall days in November:
10.3 days - Average rainfall days in December:
11 days
The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (8.1 days).
Average snowfall
Dennis, MA
The months with the highest snowfall are January and February (0.63").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days
Dennis, MA
- Average snowfall days in January:
6.6 days - Average snowfall days in February:
5.4 days - Average snowfall days in March:
3.9 days - Average snowfall days in April:
0.8 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 days - Average snowfall days in November:
0.6 days - Average snowfall days in December:
4.2 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Dennis, MA
- Average daylight in January:
9h and 4min - 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 1min - 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 12min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 4min - 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 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days
Dennis, MA
- Average sunshine days in January:
15.6 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
16 days - Average sunshine days in April:
15.7 days - Average sunshine days in May:
15.9 days - Average sunshine days in June:
16.6 days
- Average sunshine days in July:
16.7 days - Average sunshine days in August:
17.8 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
16.8 days - Average sunshine days in November:
17 days - Average sunshine days in December:
15.7 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is February (14.8 days).
Average UV index
Dennis, MA
The months with the highest UV index are 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
Dennis, MA
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Dennis, 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).
Dennis, Massachusetts, USA
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