Last updated: March 2, 2024
The weather in Casco, United States, during September is characterized by an average temperature of 17°C (63°F). Highs can soar to 24°C (76°F), while lows may dip to 10°C (49°F). Typically, the humidity level in Casco throughout September hovers around 78%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Casco averages 76 mm (3.0 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 12 hours 27 minutes of daylight, with the sun shining for approximately 9 hours 14 minutes each day. Additionally, there is a 55% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Casco reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 25 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 | 3 | 4 | 6 | 7 | 7 | 6 | 5 | 3 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||