St. John's, Antigua and Barbuda Climate & Monthly Averages
The climate of 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.
Climate 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).
How St. John's compares
- St. John's averages 80°F (27°C) across the year - warmer than 92% of the 3496 cities we track.
- Rain or snow reaches the ground on 211 days a year - more wet days than 92% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 81° | 75° | 15 | 1.6 in | 10.7 h/day | 11.2 h | 49% | 72% |
| February | 81° | 75° | 14 | 2.0 in | 10.9 h/day | 11.6 h | 51% | 71% |
| March | 82° | 75° | 15 | 1.8 in | 11.5 h/day | 12.0 h | 49% | 70% |
| April | 83° | 76° | 16 | 2.1 in | 11.7 h/day | 12.5 h | 53% | 72% |
| May | 84° | 78° | 16 | 2.3 in | 11.5 h/day | 12.9 h | 53% | 73% |
| June | 85° | 79° | 16 | 2.3 in | 11.6 h/day | 13.1 h | 53% | 73% |
| July | 86° | 79° | 20 | 3.1 in | 11.7 h/day | 13.1 h | 66% | 75% |
| August | 86° | 79° | 21 | 4.2 in | 11.4 h/day | 12.7 h | 69% | 76% |
| September | 86° | 79° | 21 | 4.4 in | 11.0 h/day | 12.2 h | 71% | 77% |
| October | 85° | 79° | 20 | 4.3 in | 10.6 h/day | 11.7 h | 63% | 77% |
| November | 84° | 78° | 19 | 4.1 in | 10.1 h/day | 11.3 h | 63% | 76% |
| December | 82° | 76° | 16 | 1.9 in | 10.4 h/day | 11.1 h | 53% | 72% |
St. John's month by month
Average high and low for each month, with the bar showing where it sits in St. John's's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 15 days
- Sunshine
- 10.7 h
- Daylight
- 11.2 h
February
- Rain
- 14 days
- Sunshine
- 10.9 h
- Daylight
- 11.6 h
March
- Rain
- 15 days
- Sunshine
- 11.5 h
- Daylight
- 12.0 h
April
- Rain
- 16 days
- Sunshine
- 11.7 h
- Daylight
- 12.5 h
May
- Rain
- 16 days
- Sunshine
- 11.5 h
- Daylight
- 12.9 h
June
- Rain
- 16 days
- Sunshine
- 11.6 h
- Daylight
- 13.1 h
July
- Rain
- 20 days
- Sunshine
- 11.7 h
- Daylight
- 13.1 h
August
- Rain
- 21 days
- Sunshine
- 11.4 h
- Daylight
- 12.7 h
September
- Rain
- 21 days
- Sunshine
- 11.0 h
- Daylight
- 12.2 h
October
- Rain
- 20 days
- Sunshine
- 10.6 h
- Daylight
- 11.7 h
November
- Rain
- 19 days
- Sunshine
- 10.1 h
- Daylight
- 11.3 h
December
- Rain
- 16 days
- Sunshine
- 10.4 h
- Daylight
- 11.1 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in St. John's
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.
Climate questions, answered
How much do temperatures drop at night in St. John's?
How many rainy days does St. John's get in a year?
Is St. John's cold in winter?
Does St. John's have seasons?
Best time to visit St. John's
January to April is the sweet spot for St. John's - humidity and rainfall are at their lowest, which is what actually varies here. Expect 82°F (28°C) in the afternoon and around 15 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in January.
Pack for St. John's with light clothing for the warm months and proper waterproofs rather than an umbrella - wet days are the norm here. Note the gap between afternoon and night: August pairs 86°F (30°C) with 79°F (26°C).
St. John's temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.