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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 31°C, while the coldest is February averaging around 22°C at night. Around 1001 mm of precipitation falls each year, peaking in October (127 mm) and easing off in March (33 mm).
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 (°C) | 28 | 28 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 30 | 29 |
| Avg temp (°C) | 25 | 25 | 26 | 26 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 26 |
| Avg low (°C) | 22 | 22 | 23 | 23 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 23 |
| Precipitation (mm) | 58 | 37 | 33 | 59 | 94 | 80 | 101 | 109 | 102 | 127 | 121 | 80 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 29 | 30 | 30 | 31 |
| Avg temp (°C) | 25 | 25 | 26 | 26 | 27 | 28 |
| Avg low (°C) | 22 | 22 | 23 | 23 | 24 | 25 |
| Precipitation (mm) | 58 | 37 | 33 | 59 | 94 | 80 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 30 | 29 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 27 | 26 |
| Avg low (°C) | 25 | 25 | 25 | 24 | 24 | 23 |
| Precipitation (mm) | 101 | 109 | 102 | 127 | 121 | 80 |
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 (km/h) | 22.6 | 22.2 | 20.7 | 20.2 | 20.4 | 22.5 | 23.3 | 21.1 | 18.2 | 17.6 | 19.4 | 21.7 |
| 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 (km/h) | 22.6 | 22.2 | 20.7 | 20.2 | 20.4 | 22.5 |
| 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 (km/h) | 23.3 | 21.1 | 18.2 | 17.6 | 19.4 | 21.7 |
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.