Chatham weather in July 2025

Expect daytime maximum temperatures of 25°C in Chatham, Massachusetts in July based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 64 mm of rainfall in the month.

  • 25°C maximum daytime temperature in July in Chatham25
    25°C max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in July in Chatham9
    9 days with some rainfall
  • 17°C minimum night-time temperature in July in Chatham17
    17°C min night temperature
  • 15 hours of daylight per day in July in Chatham15
    15 hours of daylight per day
  • No heat & humidity in July in Chatham0
    No heat & humidity
  • 64 mm monthly rainfall in July in Chatham64
    64 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in July in Chatham8
    8 (Very High) UV index
  • 18°C sea temperature in July in Chatham18
    18°C sea temperature

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The July 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Chatham in July?

Daytime temperatures usually reach 25°C in Chatham in July with no heat and humidity, falling to 17°C at night.

How sunny is it in Chatham in July?

There are normally 9 hours of bright sunshine each day in Chatham in July - that's 57% of daylight hours.

How warm is the sea around Chatham in July?

The average sea temperature around Chatham in July is 18°C.

Does it rain in Chatham in July?

There are usually 9 days with some rain in Chatham in July and the average monthly rainfall is 64mm.

Chatham July sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 04:09 19:18
Wednesday, 16th July 2025 04:20 19:12
Thursday, 31st July 2025 04:33 18:58

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