September Weather in Monticello

Last updated: March 2, 2024

The weather in Monticello, United States, during September is characterized by an average temperature of 18°C (65°F). Highs can soar to 33°C (91°F), while lows may dip to 3°C (39°F). Typically, the humidity level in Monticello throughout September hovers around 59%.

3°C (39°F)

Minimum temperature

18°C (65°F)

Average temperature

33°C (91°F)

Maximum temperature

59%

Humidity

Precipitation and Sunshine hours

In September, Monticello averages 26 mm (1.0 inches) of rainfall, typically over the course of 4 rainy days. The month enjoys an average of 12 hours 22 minutes of daylight, with the sun shining for approximately 10 hours 33 minutes each day. Additionally, there is a 73% probability of sunny days during this period.

26 mm (1.0 inches)

Precipitation

4 rainy days

Rainy days

10 hours 33 minutes

Sunshine hours

73%

Chance of sun

UV Index

In September, the UV Index in Monticello 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.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  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 5 7 9 10 9 8 5 3 1 1
Exposure Low Moderate High VeryHigh Moderate Low
Time to burn 45 min 30 min 25 min 15 min 30 min 45 min

Compare Monticello's Climate with Cities Worldwide