St John's weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St John's in August. Check more long-term weather averages for St John's in August before you book your next holiday to Antigua in 2025/2026.

  • 31°C maximum daytime temperature in August in St John's31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 16 days with some rainfall in August in St John's16
    16 days with some rainfall
  • 25°C minimum night-time temperature in August in St John's25
    25°C min night temperature
  • 13 hours of daylight per day in August in St John's13
    13 hours of daylight per day
  • Very high heat & humidity in August in St John'sVH
    Very High heat & humidity
  • 124 mm monthly rainfall in August in St John's124
    124 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in St John's11
    11+ (Extreme) UV index
  • 28°C sea temperature in August in St John's28
    28°C sea temperature

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The August weather guide for Antigua (St John's) 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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More about Antigua

How hot is it in St John's in August?

Daytime temperatures usually reach 31°C in St John's in August with very high heat and humidity, falling to 25°C at night.

How sunny is it in St John's in August?

There are normally 8 hours of bright sunshine each day in St John's in August - that's 64% of daylight hours.

How warm is the sea around St John's in August?

The average sea temperature around St John's in August is 28°C.

Does it rain in St John's in August?

There are usually 16 days with some rain in St John's in August and the average monthly rainfall is 124mm.

What is the chance of a hurricane in St John's in August?

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

St John's August sunrise & sunset times

Browse the sunrise and sunset times for St John's in August 2025. Select a month to view St John's sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:47 18:40
Saturday, 16th August 2025 05:51 18:32
Sunday, 31st August 2025 05:54 18:21

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