Climate and monthly weather forecastSouth Yarmouth, MA
Climate and monthly weather forecast
Weather in January
January, like December, in South Yarmouth, Massachusetts, is an icy winter month, with an average temperature fluctuating between 38.5°F (3.6°C) and 30.6°F (-0.8°C). South Yarmouth's coldest temperatures are experienced in January, with average high temperatures of 38.5°F (3.6°C) and lows of 30.6°F (-0.8°C). Weather in January »Weather in February
February, the last month of the winter in South Yarmouth, is also an icy month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 38.8°F (3.8°C). In February, the average high-temperature registers at a still icy 38.8°F (3.8°C), nearly identical to January's 38.5°F (3.6°C). Weather in February »Weather in March
The first month of the spring, March, is also an icy month in South Yarmouth, Massachusetts, with an average temperature fluctuating between 35.6°F (2°C) and 41.4°F (5.2°C). With the onset of March, South Yarmouth's average high-temperature clocks in at a still cold 41.4°F (5.2°C), showing a minor fluctuation from the previous month. Weather in March »Weather in April
April is a chilly spring month in South Yarmouth, Massachusetts, with an average temperature varying between 42.4°F (5.8°C) and 47.1°F (8.4°C). April's arrival sees a mild rise in the average high-temperature, transitioning from March's cold 41.4°F (5.2°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 fresh month in South Yarmouth, Massachusetts, with an average temperature fluctuating between 51.3°F (10.7°C) and 55°F (12.8°C). The arrival of May signals a slight increase in the average high-temperature, moving from a chilly 47.1°F (8.4°C) in April to a fresh 55°F (12.8°C). Weather in May »Weather in June
June, the first month of the summer in South Yarmouth, is an enjoyable month, with an average temperature ranging between min 59.4°F (15.2°C) and max 63.5°F (17.5°C). June sees a marginal temperature increase, moving from a cool 55°F (12.8°C) in May to a comfortable 63.5°F (17.5°C). Weather in June »Weather in July
July is a pleasant summer month in South Yarmouth, Massachusetts, with an average temperature ranging between max 71.6°F (22°C) and min 67.6°F (19.8°C). In July, the meteorological conditions subtly change with the average high-temperature edging from a comfortable 63.5°F (17.5°C) in June to an agreeable 71.6°F (22°C). Weather in July »Weather in August
The last month of the summer, August, is also an agreeable month in South Yarmouth, Massachusetts, with an average temperature varying between 72.1°F (22.3°C) and 68.5°F (20.3°C). In South Yarmouth, the month of August registers the highest temperatures, averaging 72.1°F (22.3°C) at the peak and 68.5°F (20.3°C) at the lowest. Weather in August »Weather in September
September, the first month of the autumn in South Yarmouth, is still a refreshing month, with an average temperature fluctuating between 67.1°F (19.5°C) and 63°F (17.2°C). The advent of September signifies a minor shift to an average high-temperature of a comfortable 67.1°F (19.5°C), aligning closely with August. Weather in September »Weather in October
October, the same as September, in South Yarmouth, Massachusetts, is a moderate autumn month, with an average temperature ranging between max 59.9°F (15.5°C) and min 54.7°F (12.6°C). October's arrival subtly correlates with a reduction in the average high-temperature, down from a comfortable 67.1°F (19.5°C) in September to a still refreshing 59.9°F (15.5°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in South Yarmouth, Massachusetts, with an average temperature varying between 51.3°F (10.7°C) and 45.1°F (7.3°C). November is characterized by a mild reduction in the average high-temperature, from a refreshing 59.9°F (15.5°C) in October to a fresh 51.3°F (10.7°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in South Yarmouth, Massachusetts, with an average temperature varying between 43.7°F (6.5°C) and 36.9°F (2.7°C). Start of December brings a slight shift in the average high-temperature, dipping a bit from November's cool 51.3°F (10.7°C) to a chilly 43.7°F (6.5°C). Weather in December »Updated: Aug 10, 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 is the coldest month, with the temperature often reaching an average high of 38.5°F (3.6°C) and an average low of 30.6°F (-0.8°C).
Throughout the year, there are 129 rainfall days, and 14.21" (361mm) of precipitation is accumulated.
January through April and December are months with snowfall.
The month with the most snowfall is January, when snow falls for 6.4 days and typically aggregates up to 0.87" (22mm) of snow.
Throughout the year, there are 20.8 snowfall days, and 2.6" (66mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The months with the least sunshine are February and December, with an average of 4.6h of sunshine.
March is the month with the coldest seawater in South Yarmouth, with an average ocean temperature of 39°F (3.9°C).
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.
May through November are months without snowfall.
June and July, with an average relative humidity of 84%, are most humid months.
The month with the longest days is June, with an average of 15h and 12min of daylight.
The months with the highest UV index are July and August, with an average maximum UV index of 6.
With an average high-temperature of 72.1°F (22.3°C) and an average low-temperature of 68.5°F (20.3°C), August is the warmest month.
August is the month with the least rainfall. Rain falls for 11.2 days and accumulates 0.94" (24mm) of precipitation.
With an average ocean temperature of 67.5°F (19.7°C), August is the month with the warmest seawater in South Yarmouth.
With an average of 10.8h of sunshine, August has the most sunshine of the year.
October is the month with the most rainfall. Rain falls for 11.6 days and accumulates 1.93" (49mm) of precipitation.
November is the least humid month, with an average relative humidity of 74%.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
South Yarmouth, MA
The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (38.5°F).
The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure
South Yarmouth, 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:
29.96"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
South Yarmouth, MA
- Average wind speed in January:
16.8mph - Average wind speed in February:
16.3mph - Average wind speed in March:
16.5mph - Average wind speed in April:
14.4mph - Average wind speed in May:
12.5mph - Average wind speed in June:
11.7mph
- Average wind speed in July:
10.9mph - Average wind speed in August:
10.9mph - Average wind speed in September:
12.8mph - Average wind speed in October:
14.8mph - Average wind speed in November:
16mph - Average wind speed in December:
16.4mph
The windiest month (with the highest average wind speed) is January (16.8mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).
Average humidity
South Yarmouth, MA
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).
Average rainfall
South Yarmouth, MA
- Average rainfall in January:
1.06" - Average rainfall in February:
1.02" - Average rainfall in March:
1.06" - Average rainfall in April:
1.34" - Average rainfall in May:
1.14" - Average rainfall in June:
1.14"
- Average rainfall in July:
1.02" - Average rainfall in August:
0.94" - Average rainfall in September:
1.18" - Average rainfall in October:
1.93" - Average rainfall in November:
0.98" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is August (0.94").
Average rainfall days
South Yarmouth, MA
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
9.9 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
12.5 days - Average rainfall days in June:
11.2 days
- Average rainfall days in July:
12.3 days - Average rainfall days in August:
11.2 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
11.6 days - Average rainfall days in November:
11 days - Average rainfall days in December:
10.8 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (8.3 days).
Average snowfall
South Yarmouth, MA
The month with the highest snowfall is January (0.87").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days
South Yarmouth, MA
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
5.1 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.4 days - Average snowfall days in May:
0 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:
4.5 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature
South Yarmouth, MA
The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).
Average daylight / Average sunshine
South Yarmouth, MA
- Average daylight in January:
9h and 36min - 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 48min - 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 54min - Average daylight in December:
9h and 12min
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 48min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 48min - Average sunshine in September:
8h and 42min - Average sunshine in October:
6h and 42min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).
Average sunshine days
South Yarmouth, MA
- Average sunshine days in January:
15.4 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
16.4 days - Average sunshine days in June:
16.8 days
- Average sunshine days in July:
17.6 days - Average sunshine days in August:
18.3 days - Average sunshine days in September:
18.6 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
16.5 days - Average sunshine days in December:
15.3 days
The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (14.3 days).
Average UV index
South Yarmouth, 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
South Yarmouth, MA
The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
South Yarmouth, 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).
