New Haven weather in August 2025

Expect 27°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in New Haven in August. Check more long-term weather averages for New Haven in August before you book your next holiday to Connecticut in 2025/2026.

• 27
  27°C max day temperature
• 8
  8 hours of sunshine per day
• 9
  9 days with some rainfall
• 17
  17°C min night temperature
• 14
  14 hours of daylight per day
• L
  Low heat & humidity
• 93
  93 mm of monthly rainfall
• 8
  8 (Very High) UV index
• 22
  22°C sea temperature

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The August weather guide for Connecticut (New Haven) 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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New Haven August sunrise & sunset times

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

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