Last updated: March 2, 2024
The weather in Saint Croix, Virgin Islands (U.S.), during September is characterized by an average temperature of 28°C (82°F). Highs can soar to 29°C (85°F), while lows may dip to 26°C (78°F). Typically, the humidity level in Saint Croix throughout September hovers around 80%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Saint Croix averages 156 mm (6.2 inches) of rainfall, typically over the course of 20 rainy days. The month enjoys an average of 12 hours 12 minutes of daylight, with the sun shining for approximately 10 hours 38 minutes each day. Additionally, there is a 61% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Saint Croix reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 3 | 6 | 9 | 13 | 14 | 13 | 11 | 7 | 3 | 1 | 1 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | High | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 25 min | 30 min | 45 min | |||||