September Weather in McChord Air Force Base

Last updated: March 2, 2024

The weather in McChord Air Force Base, United States, during September is characterized by an average temperature of 17°C (63°F). Highs can soar to 27°C (81°F), while lows may dip to 10°C (50°F). Typically, the humidity level in McChord Air Force Base throughout September hovers around 74%.

10°C (50°F)

Minimum temperature

17°C (63°F)

Average temperature

27°C (81°F)

Maximum temperature

74%

Humidity

Precipitation and Sunshine hours

In September, McChord Air Force Base averages 83 mm (3.3 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 29 minutes of daylight, with the sun shining for approximately 8 hours 37 minutes each day. Additionally, there is a 35% probability of sunny days during this period.

83 mm (3.3 inches)

Precipitation

10 rainy days

Rainy days

8 hours 37 minutes

Sunshine hours

35%

Chance of sun

UV Index

In September, the UV Index in McChord Air Force Base 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 McChord Air Force Base's Climate with Cities Worldwide