Last updated: March 2, 2024
The weather in Lake Monticello, United States, during September is characterized by an average temperature of 22°C (72°F). Highs can soar to 34°C (94°F), while lows may dip to 10°C (50°F). Typically, the humidity level in Lake Monticello throughout September hovers around 75%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Lake Monticello averages 92 mm (3.6 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 22 minutes of daylight, with the sun shining for approximately 9 hours 5 minutes each day. Additionally, there is a 59% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Lake Monticello reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 | 6 | 8 | 8 | 8 | 6 | 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 | ||||||