St. John's, Antigua and Barbuda Weather
St. John's hourly forecast: next 24 hours
Today's high of 83°F (28°C) is about 3°F (2°C) below the typical August high of 86°F (30°C).
Current conditions in detail
St. John's weather tomorrow (Friday, August 14)
Tomorrow in St. John's looks patchy rain nearby, with a high of 84° and an overnight low of 81°. Precipitation chance is modest at 36%. Winds top out near 24 mph, and the UV index reaches 12 (extreme).
St. John's 14-day forecast
About the weather in St. John's
Located in Antigua and Barbuda, St. John's experiences a tropical wet-and-dry climate with year-round warmth split between a rainy season and a pronounced dry season. Afternoon temperatures peak near 86°F (30°C) in August and dip to about 81°F (27°C) in February, with around 33.9 inches (862 mm) of precipitation falling across the year.
St. John's weather: quick facts
- Hottest month: August - highs near 86°F (30°C)
- Coldest month: February - highs near 81°F (27°C)
- Record high: 92°F (34°C) · Record low: 66°F (19°C) (2015–2024)
- Wettest month: September (21 rainy days) · Sunniest: April (11.7 h sun/day)
- Climate type: tropical wet-and-dry - year-round warmth split between a rainy season and a pronounced dry season
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 86°F (30°C) and overnight lows stay near 79°F (26°C). The coolest month is February, with typical highs of 81°F (27°C) and lows around 75°F (24°C). Based on 2015–2024 weather data, temperatures have reached as high as 92°F (34°C) and dropped as low as 66°F (19°C).
Rain, sun and snow
September is usually the wettest month. It brings about 4.4 inches (111 mm) of rain over 21 days, while January is the driest. April brings the most sunshine, averaging 11.7 hours of sun a day.
Season by season
March through May
March through May in St. John's is hot, with daytime highs averaging 83°F (28°C) and nights around 76°F (24°C); expect showers on roughly 47 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
June through August
June through August in St. John's runs hot, with daytime highs averaging 86°F (30°C) and nights around 79°F (26°C); expect showers on roughly 58 days across the season.
September through November
September through November in St. John's runs hot, with daytime highs averaging 85°F (29°C) and nights around 78°F (26°C); expect showers on roughly 60 days across the season.
December through February
December through February in St. John's brings hot afternoons, with daytime highs averaging 82°F (28°C) and nights around 75°F (24°C); expect showers on roughly 46 days across the season.
Average temperatures in St. John's by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 81° | 75° | 15 | 1.6 in | 10.7 h/day | 72% |
| February | 81° | 75° | 14 | 2.0 in | 10.9 h/day | 71% |
| March | 82° | 75° | 15 | 1.8 in | 11.5 h/day | 70% |
| April | 83° | 76° | 16 | 2.1 in | 11.7 h/day | 72% |
| May | 84° | 78° | 16 | 2.3 in | 11.5 h/day | 73% |
| June | 85° | 79° | 16 | 2.3 in | 11.6 h/day | 73% |
| July | 86° | 79° | 20 | 3.1 in | 11.7 h/day | 75% |
| August | 86° | 79° | 21 | 4.2 in | 11.4 h/day | 76% |
| September | 86° | 79° | 21 | 4.4 in | 11.0 h/day | 77% |
| October | 85° | 79° | 20 | 4.3 in | 10.6 h/day | 77% |
| November | 84° | 78° | 19 | 4.1 in | 10.1 h/day | 76% |
| December | 82° | 76° | 16 | 1.9 in | 10.4 h/day | 72% |