Chatham weather in August 2025

Expect 75°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Chatham in August. Check more long-term weather averages for Chatham in August before you book your next holiday to Massachusetts in 2025/2026.

  • 75°F maximum daytime temperature in August in Chatham75
    75°F max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in August in Chatham10
    10 days with some rainfall
  • 63°F minimum night-time temperature in August in Chatham63
    63°F min night temperature
  • 14 hours of daylight per day in August in Chatham14
    14 hours of daylight per day
  • No heat & humidity in August in Chatham0
    No heat & humidity
  • 3.5 inches monthly rainfall in August in Chatham3.5
    3.5 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Chatham8
    8 (Very High) UV index
  • 66°F sea temperature in August in Chatham66
    66°F sea temperature

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The August weather guide for Massachusetts (Chatham) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Chatham in August?

Daytime temperatures usually reach 75°F in Chatham in August, falling to 63°F at night.

How sunny is it in Chatham in August?

There are normally 8 hours of bright sunshine each day in Chatham in August - that's 58% of daylight hours.

How warm is the sea around Chatham in August?

The average sea temperature around Chatham in August is 66°F.

Does it rain in Chatham in August?

There are usually 10 days with some rain in Chatham in August and the average monthly rainfall is 3.5 inches.

What is the chance of a hurricane in Chatham in August?

On average less than 1 day in August in Chatham is likely to be affected by the passage of one or more tropical storms.

Chatham August sunrise & sunset times

Browse the sunrise and sunset times for Chatham in August 2025. Select a month to view Chatham sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:34 18:57
Saturday, 16th August 2025 04:50 18:38
Sunday, 31st August 2025 05:05 18:14

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