Last updated: March 2, 2024
The weather in Hampstead, United States, during September is characterized by an average temperature of 25°C (77°F). Highs can soar to 30°C (87°F), while lows may dip to 19°C (66°F). Typically, the humidity level in Hampstead throughout September hovers around 79%.
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Average temperature
Maximum temperature
Humidity
In September, Hampstead averages 237 mm (9.3 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 20 minutes of daylight, with the sun shining for approximately 9 hours 51 minutes each day. Additionally, there is a 57% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Hampstead reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 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 | 1 | 2 | 4 | 7 | 8 | 9 | 8 | 7 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||