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Saint John’s, Antigua and Barbuda climate
Aw Tropical savanna (dry winter)
Saint John’s has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is August with an average daily high near 88°F, while the coldest is February averaging around 72°F at night. Around 39 inches of precipitation falls each year, peaking in October (5.0 inches) and easing off in March (1.3 inches).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Saint John’s climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 83 | 83 | 84 | 85 | 86 | 87 | 88 | 88 | 88 | 88 | 86 | 84 |
| Avg temp (°F) | 78 | 78 | 78 | 79 | 81 | 82 | 83 | 83 | 83 | 82 | 80 | 79 |
| Avg low (°F) | 72 | 72 | 73 | 74 | 76 | 77 | 77 | 77 | 77 | 76 | 75 | 73 |
| Precipitation (in) | 2.3 | 1.4 | 1.3 | 2.3 | 3.7 | 3.2 | 4.0 | 4.3 | 4.0 | 5.0 | 4.8 | 3.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 83 | 83 | 84 | 85 | 86 | 87 |
| Avg temp (°F) | 78 | 78 | 78 | 79 | 81 | 82 |
| Avg low (°F) | 72 | 72 | 73 | 74 | 76 | 77 |
| Precipitation (in) | 2.3 | 1.4 | 1.3 | 2.3 | 3.7 | 3.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 88 | 88 | 88 | 86 | 84 |
| Avg temp (°F) | 83 | 83 | 83 | 82 | 80 | 79 |
| Avg low (°F) | 77 | 77 | 77 | 76 | 75 | 73 |
| Precipitation (in) | 4.0 | 4.3 | 4.0 | 5.0 | 4.8 | 3.2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 36 | 38 | 39 | 43 | 53 | 52 | 46 | 43 | 52 | 49 | 46 | 41 |
| Relative humidity (%) | 76 | 75 | 75 | 76 | 78 | 78 | 78 | 79 | 79 | 79 | 78 | 77 |
| Wind speed (mph) | 14.1 | 13.8 | 12.9 | 12.6 | 12.7 | 14.0 | 14.5 | 13.1 | 11.3 | 11.0 | 12.1 | 13.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 36 | 38 | 39 | 43 | 53 | 52 |
| Relative humidity (%) | 76 | 75 | 75 | 76 | 78 | 78 |
| Wind speed (mph) | 14.1 | 13.8 | 12.9 | 12.6 | 12.7 | 14.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 46 | 43 | 52 | 49 | 46 | 41 |
| Relative humidity (%) | 78 | 79 | 79 | 79 | 78 | 77 |
| Wind speed (mph) | 14.5 | 13.1 | 11.3 | 11.0 | 12.1 | 13.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at V C Bird Intl, a weather station, about 6 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.