September Weather in Lake Ketchum

Last updated: March 2, 2024

The weather in Lake Ketchum, United States, during September is characterized by an average temperature of 15°C (60°F). Highs can soar to 27°C (81°F), while lows may dip to 7°C (44°F). Typically, the humidity level in Lake Ketchum throughout September hovers around 76%.

7°C (44°F)

Minimum temperature

15°C (60°F)

Average temperature

27°C (81°F)

Maximum temperature

76%

Humidity

Precipitation and Sunshine hours

In September, Lake Ketchum averages 127 mm (5.0 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 12 hours 30 minutes of daylight, with the sun shining for approximately 8 hours 47 minutes each day. Additionally, there is a 35% probability of sunny days during this period.

127 mm (5.0 inches)

Precipitation

11 rainy days

Rainy days

8 hours 47 minutes

Sunshine hours

35%

Chance of sun

UV Index

In September, the UV Index in Lake Ketchum reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 25 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 3 5 6 7 6 5 4 2 1 1
Exposure Low Moderate High Moderate Low
Time to burn 45 min 30 min 25 min 30 min 45 min

Compare Lake Ketchum's Climate with Cities Worldwide