St. John's, Antigua and Barbuda Weather
St. John's hourly forecast: next 24 hours
Today's high of 84°F (29°C) is right in line with the typical August high of 86°F (30°C).
Current conditions in detail
St. John's weather tomorrow (Thursday, August 27)
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 19 mph, and the UV index reaches 11 (very high).
St. John's 14-day forecast
About the weather in St. John's
There is not much of a seasonal calendar in St. John's. Its warmest and coolest months differ by 3°C, against a dataset median nearer 15°C, which leaves 86°F (30°C) in August and 81°F (27°C) in February as the two ends of 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)
- Decade extremes (2015-2024): 92°F (34°C) high · 66°F (19°C) low
- Wettest month: September (21 rainy days) · Sunniest: April (11.7 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 3°C between the average warmest and coolest month · day to night: 4°C
- Months averaging 30°C or hotter: 2
- Average humidity: 74%
Temperatures through the year
Between the average August and the average February lie 3°C, a narrower spread than all but 7% of the 3496 cities in our dataset. February bottoms out at 81°F (27°C) in daylight, 75°F (24°C) after dark. At its warmest, in August, St. John's runs to 86°F (30°C) in the afternoon and back to 79°F (26°C) by dawn. Days and nights are about 4°C apart on average - narrower than almost anywhere else we cover.
Rain, sun and snow
Sunshine averages 11.1 hours a day over the year - sunnier than 97% of the 3496 cities in our dataset, peaking in April at 11.7 hours. The wettest month is September (4.4 inches (111 mm) across 21 days) and the driest January. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 92°F (34°C) and the lowest daily minimum 66°F (19°C).
Season by season
March through May
March through May brings hot afternoons here - highs near 83°F (28°C), nights near 76°F (24°C), and rain falls on around 47 of the 90 days. Daylight is generous - around 11.6 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
June through August
June through August sits firmly in the heat here - highs near 86°F (30°C), nights near 79°F (26°C), and rain falls on around 58 of the 90 days. Daylight is generous - around 11.6 hours of sun a day.
September through November
September through November in St. John's sits firmly in the heat, with daytime highs averaging 85°F (29°C) and nights around 78°F (26°C); rain falls on around 60 of the 90 days. Daylight is generous - around 10.6 hours of sun a day.
December through February
December through February in St. John's runs hot, with daytime highs averaging 82°F (28°C) and nights around 75°F (24°C); rain falls on around 46 of the 90 days. Daylight is generous - around 10.7 hours of sun a day.
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% |