Portsmouth weather in June 2026

Expect daytime maximum temperatures of 31°C in Portsmouth, Dominica in June and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 18 days with some rainfall and typically 173 mm of rainfall in the month.

  • 31°C maximum daytime temperature in June in Portsmouth31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 18 days with some rainfall in June in Portsmouth18
    18 days with some rainfall
  • 23°C minimum night-time temperature in June in Portsmouth23
    23°C min night temperature
  • 13 hours of daylight per day in June in Portsmouth13
    13 hours of daylight per day
  • High heat & humidity in June in PortsmouthH
    High heat & humidity
  • 173 mm monthly rainfall in June in Portsmouth173
    173 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Portsmouth11
    11+ (Extreme) UV index
  • 28°C sea temperature in June in Portsmouth28
    28°C sea temperature

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The June weather guide for Dominica (Portsmouth) 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 Portsmouth in June?

Daytime temperatures usually reach 31°C in Portsmouth in June with very high heat and humidity, falling to 23°C at night.

How sunny is it in Portsmouth in June?

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

How warm is the sea around Portsmouth in June?

The average sea temperature around Portsmouth in June is 28°C.

Does it rain in Portsmouth in June?

There are usually 19 days with some rain in Portsmouth in June and the average monthly rainfall is 185mm.

Portsmouth June sunrise & sunset times

Browse the sunrise and sunset times for Portsmouth in June 2026. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st June 2026 05:34 18:34
Monday, 15th June 2026 05:35 18:38
Tuesday, 30th June 2026 05:38 18:41

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