St. John's, Antigua and Barbuda Climate & Monthly Averages
The climate of 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.
Climate 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.
Monthly climate table
| 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% |
St. John's month by month
St. John's weather in January
January brings highs around 81°F (27°C), lows near 75°F (24°C), about 15 wet days - typically the driest month of the year in St. John's.
St. John's weather in February
February brings highs around 81°F (27°C), lows near 75°F (24°C), about 14 wet days - typically the coldest month of the year in St. John's.
St. John's weather in March
March brings highs around 82°F (28°C), lows near 75°F (24°C), about 15 wet days.
St. John's weather in April
April brings highs around 83°F (28°C), lows near 76°F (24°C), about 16 wet days - typically the sunniest month of the year in St. John's.
St. John's weather in May
May brings highs around 84°F (29°C), lows near 78°F (25°C), about 16 wet days.
St. John's weather in June
June brings highs around 85°F (30°C), lows near 79°F (26°C), about 16 wet days.
St. John's weather in July
July brings highs around 86°F (30°C), lows near 79°F (26°C), about 20 wet days.
St. John's weather in August
August brings highs around 86°F (30°C), lows near 79°F (26°C), about 21 wet days - typically the hottest month of the year in St. John's.
St. John's weather in September
September brings highs around 86°F (30°C), lows near 79°F (26°C), about 21 wet days - typically the wettest month of the year in St. John's.
St. John's weather in October
October brings highs around 85°F (30°C), lows near 79°F (26°C), about 20 wet days.
St. John's weather in November
November brings highs around 84°F (29°C), lows near 78°F (25°C), about 19 wet days.
St. John's weather in December
December brings highs around 82°F (28°C), lows near 76°F (25°C), about 16 wet days.
Seasons in St. John's
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.
Climate questions, answered
What is the average temperature in St. John's?
Is St. John's hot in summer?
Is St. John's cold in winter?
How many rainy days does St. John's get in a year?
Best time to visit St. John's
The best time to visit St. John's is generally January to April, when these months combine the driest skies with the most comfortable heat. Daytime temperatures in that window typically sit near 82°F (28°C).
Pack for St. John's with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - August nights average 79°F (26°C).
St. John's temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.