Saint John Weather in August
August in Saint John brings high temperatures, with daytime highs of 30°C (86°F) and nights around 27°C (81°F). Quite a bit of rainfall is expected, around 112 mm (4.4 in), so pack an umbrella.
Rainfall in Saint John in August
Typically, you can expect about 20 days of rain this month, with 112 mm (4.4 in) on average. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Saint John in August
Expect highs of 30°C (86°F) in Saint John in August, with nights dropping to around 27°C (81°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 27°C (81°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help.August in Saint John has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit US Virgin Islands, check out our Saint John's climate page.
Saint John Temperature in August
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Chance of Rain
65%
Precipitation
112 mm (4.4 in)
Rainy days
20 days
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Saint John typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 27°C (81°F).
Average temperatures in August
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Saint John in August
Browse day-by-day weather records for Saint John spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Saint John historical weather extremes in August
Our historical data for Saint John spans 1997 to 2025, revealing these weather extremes.
- On August 5, 1997, temperatures climbed to 37°C (99°F), marking the warmest August day on record.
- On August 22, 2014, Saint John saw its coldest August day with temperatures maxing out at 27°C (81°F).
- Nighttime temperatures dropped to 22°C (72°F) on August 4, 2001, marking the coldest August night on record.
Best Places in US Virgin Islands in August
Find out more about the weather in US Virgin Islands and which places have the best travel conditions in this month. See all of US Virgin Islands in August →
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What to Wear in Saint John in August
Warm but pleasant conditions in Saint John in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags.What To Do in Saint John in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit US Virgin Islands, check out our Saint John's climate page.
See the full Saint John climate overview or explore weather in US Virgin Islands.
