Hyannis (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hyannis.
Climate overview of Hyannis
Hyannis, Massachusetts, United States of America, sees big temperature differences between seasons, with July peaking at 26°C (79°F) and February dropping to 4°C (39°F).
Rain/snowfall is high, totalling around 1259 mm (50 in) per year. December is the wettest month and August the driest. The most sunshine falls in July, with an average of 10.0 hours of daily sunshine.
Hyannis Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hyannis — and find the best time to visit.
Monthly Temperature in Hyannis
Visitors to Hyannis can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 26°C (79°F) in July, the warmest time of the year, to a chilly 4°C (39°F) during cooler months like February.
At night, you can expect temperatures ranging from 19°C (66°F) in July to around -5°C (23°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hyannis
Hyannis is known for its substantial rain/snowfall, with annual precipitation reaching 1259 mm (50 in). While rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 137 mm (5.4 in) of precipitation, spread over 14 rainy days.
In contrast, the driest month August experiences a drier climate, with about 79 mm (3.1 in) of rainfall spread across 9 rainy days. For more details, please visit our Hyannis 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 Hyannis
Seasonal changes in sunshine hours are quite dramatic in Hyannis. While July receives considerable daily sunshine with up to 10.0 hours, January marks the darkest time of the year, where sunshine is scarce with only 4.9 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Hyannis
The weather does bring rainfall during this period, between 79 mm (3.1 in) and 104 mm (4.1 in). Looking for inspiration on where to travel this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
Frequently asked questions about the climate in Hyannis
What is the best time to visit Hyannis?
July and August typically offer the most optimal weather in Hyannis. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Hyannis?
Daytime highs range from 4°C (39°F) in February to 26°C (79°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 Hyannis get?
Annual rainfall is around 1259 mm (50 in). December is the wettest month with 137 mm (5.4 in), while August is the driest with 79 mm (3.1 in).
How sunny is Hyannis?
Hyannis 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, Hyannis enjoys abundant sunshine.
Hyannis 3-Day Forecast
Hyannis (MA) 3-Day Forecast
Hyannis on the map
Hyannis is highlighted — select any city to see its climate.
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