Winthrop (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Winthrop.
Climate overview of Winthrop
Temperatures in Winthrop, Massachusetts, United States of America, vary greatly throughout the year. July is the hottest month at 28°C (82°F), while January is the coldest at 3°C (37°F).
The city receives considerable rain/snowfall, with around 1217 mm (48 in) annually. December is the wettest month. It has warm summers and cold winters. Sunshine peaks in May, when the city sees around 10.0 hours of sunshine per day.
Winthrop Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Winthrop - and find the best time to visit.
Monthly Temperature in Winthrop
The climate in Winthrop is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in July to a chilly 3°C (37°F) in the coolest month, January.
Nights vary from 19°C (66°F) in July to around -5°C (23°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Winthrop
Winthrop has a notably wet climate with abundant precipitation, recording 1217 mm (48 in) of rain/snowfall per year. Winthrop offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month December (129 mm (5.1 in)) and the driest month September (76 mm (3 in)) is not too significant. For more details, please visit our Winthrop 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 Winthrop
For those who appreciate different seasons, Winthrop serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 10.0 hours of sunshine daily, and embrace the darker days in December, offering only 4.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Winthrop
The mean water temperature over the year ranges from 4°C (39°F) in February to 20°C (68°F) in August.
Water temperature over the year
Humidity in Winthrop by Month
The relative humidity is high throughout the year in Winthrop.
The city experiences its highest humidity in August, reaching 72%. In February, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Winthrop
The average wind speed over the year ranges from 5 m/s (10 knots) to 7 m/s (14 knots). It is lower in June, July, August and September and higher in January, February, March and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Winthrop
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: August and September
- Warmest weather: July and August
- Most sunshine: May and July
- Best for swimming: August, with water temperatures around 20°C (68°F).
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Winthrop
What is the best time to visit Winthrop?
August and September typically offer the most optimal weather in Winthrop. In contrast, January, February, March and December tend to have less optimal conditions. Winthrop has warm summers and cold winters.
What temperatures can I expect in Winthrop?
Daytime highs range from 3°C (37°F) in January to 28°C (82°F) in July. Nighttime lows range from -5°C (23°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Winthrop get?
Annual rainfall is around 1217 mm (48 in). December is the wettest month with 129 mm (5.1 in), while September is the driest with 76 mm (3 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Winthrop?
Winthrop receives around 2,665 hours of sunshine per year. May is the sunniest month with 301 hours, while December is the cloudiest with just 141 hours. Overall, Winthrop enjoys abundant sunshine.
Winthrop 3-Day Forecast
Winthrop on the map
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