South Yarmouth (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit South Yarmouth.
Climate overview of South Yarmouth
The climate in South Yarmouth, Massachusetts, United States of America, is marked by large temperature swings across the seasons, ranging from 26°C (79°F) in July to 4°C (39°F) in February.
The city has a wet climate, receiving around 1247 mm (49 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and cold winters. December is the wettest month. The sunniest month is July, with 10.0 hours of sunshine per day on average.
South Yarmouth Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in South Yarmouth - and find the best time to visit.
Monthly Temperature in South Yarmouth
In South Yarmouth, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 26°C (79°F) in July to a chilly 4°C (39°F) in February.
Nighttime temperatures range from 19°C (66°F) in July to -4°C (25°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in South Yarmouth
South Yarmouth experiences significant rain/snowfall throughout the year, averaging 1247 mm (49 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, December, sees around 139 mm (5.5 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, August, still receives a respectable 80 mm (3.1 in) of rainfall. For more details, please visit our South Yarmouth Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in South Yarmouth
In South Yarmouth, summer days are longer and more sunny, with daily sunshine hours peaking at 10.0 hours in July. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 4.9 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit South Yarmouth
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July, August and September
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: February, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in South Yarmouth
What is the best time to visit South Yarmouth?
June, July, August and September typically offer the most optimal weather in South Yarmouth. In contrast, January, February, March, November and December tend to have less optimal conditions. South Yarmouth has warm summers and cold winters.
What temperatures can I expect in South Yarmouth?
Daytime highs range from 4°C (39°F) in February to 26°C (79°F) in July. Nighttime lows range from -4°C (25°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does South Yarmouth get?
Annual rainfall is around 1247 mm (49 in). December is the wettest month with 139 mm (5.5 in), while August is the driest with 80 mm (3.1 in).
How sunny is South Yarmouth?
South Yarmouth receives around 2,605 hours of sunshine per year. July is the sunniest month with 301 hours, while January is the cloudiest with just 147 hours. Overall, South Yarmouth enjoys abundant sunshine.
South Yarmouth 3-Day Forecast
South Yarmouth on the map
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