Last updated: March 2, 2024
The weather in Hallettsville, United States, during September is characterized by an average temperature of 27°C (81°F). Highs can soar to 37°C (98°F), while lows may dip to 17°C (62°F). Typically, the humidity level in Hallettsville throughout September hovers around 73%.
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Average temperature
Maximum temperature
Humidity
In September, Hallettsville averages 110 mm (4.3 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 17 minutes of daylight, with the sun shining for approximately 9 hours 6 minutes each day. Additionally, there is a 53% probability of sunny days during this period.
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Chance of sun
In September, the UV Index in Hallettsville reaches a maximum of 10, 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 | 0 | 1 | 2 | 4 | 7 | 9 | 10 | 10 | 8 | 6 | 3 | 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 | ||||||