Home › Cities › US Virgin Islands › Saint Croix
Saint Croix, US Virgin Islands climate
Aw Tropical savanna (dry winter)
Saint Croix has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is August with an average daily high near 89°F, while the coldest is January averaging around 72°F at night. Precipitation totals about 35 inches a year and is strongly seasonal — November alone averages 5.3 inches while February barely receives 1.30 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 Croix climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 85 | 85 | 86 | 87 | 89 | 89 | 89 | 89 | 88 | 87 | 85 |
| Avg temp (°F) | 78 | 78 | 79 | 80 | 81 | 83 | 84 | 84 | 83 | 82 | 81 | 79 |
| Avg low (°F) | 72 | 72 | 72 | 74 | 76 | 78 | 78 | 78 | 77 | 76 | 75 | 73 |
| Precipitation (in) | 1.9 | 1.3 | 1.6 | 2.0 | 3.4 | 2.0 | 2.9 | 3.2 | 4.1 | 4.5 | 5.3 | 3.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 85 | 85 | 86 | 87 | 89 |
| Avg temp (°F) | 78 | 78 | 79 | 80 | 81 | 83 |
| Avg low (°F) | 72 | 72 | 72 | 74 | 76 | 78 |
| Precipitation (in) | 1.9 | 1.3 | 1.6 | 2.0 | 3.4 | 2.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 89 | 89 | 88 | 87 | 85 |
| Avg temp (°F) | 84 | 84 | 83 | 82 | 81 | 79 |
| Avg low (°F) | 78 | 78 | 77 | 76 | 75 | 73 |
| Precipitation (in) | 2.9 | 3.2 | 4.1 | 4.5 | 5.3 | 3.1 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 13 | 12 | 10 | 12 | 11 | 16 | 15 | 15 | 16 | 16 | 17 |
| Days with high ≥ 90°F (days) | — | 0.0 | 0.1 | 0.2 | 3 | 9 | 14 | 16 | 12 | 10 | 3 | 0.1 |
| Days with low ≤ 32°F (days) | — | — | — | — | 0.0 | 0.0 | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 13 | 12 | 10 | 12 | 11 |
| Days with high ≥ 90°F (days) | — | 0.0 | 0.1 | 0.2 | 3 | 9 |
| Days with low ≤ 32°F (days) | — | — | — | — | 0.0 | 0.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 15 | 15 | 16 | 16 | 17 |
| Days with high ≥ 90°F (days) | 14 | 16 | 12 | 10 | 3 | 0.1 |
| Days with low ≤ 32°F (days) | — | — | — | — | — | — |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 34 | 32 | 36 | 37 | 52 | 50 | 45 | 41 | 49 | 47 | 45 | 37 |
| Relative humidity (%) | 76 | 75 | 75 | 77 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 76 |
| Wind speed (mph) | 13.5 | 13.2 | 12.3 | 11.8 | 11.8 | 13.1 | 13.8 | 12.7 | 10.9 | 10.6 | 11.9 | 13.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 34 | 32 | 36 | 37 | 52 | 50 |
| Relative humidity (%) | 76 | 75 | 75 | 77 | 79 | 79 |
| Wind speed (mph) | 13.5 | 13.2 | 12.3 | 11.8 | 11.8 | 13.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 45 | 41 | 49 | 47 | 45 | 37 |
| Relative humidity (%) | 79 | 79 | 79 | 78 | 78 | 76 |
| Wind speed (mph) | 13.8 | 12.7 | 10.9 | 10.6 | 11.9 | 13.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Henry E Rohlsen AP, a weather station, about 8 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.