September Weather in Northwest

Last updated: March 2, 2024

The weather in Northwest, United States, during September is characterized by an average temperature of 24°C (76°F). Highs can soar to 33°C (92°F), while lows may dip to 13°C (56°F). Typically, the humidity level in Northwest throughout September hovers around 79%.

13°C (56°F)

Minimum temperature

24°C (76°F)

Average temperature

33°C (92°F)

Maximum temperature

79%

Humidity

Precipitation and Sunshine hours

In September, Northwest averages 193 mm (7.6 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 20 minutes of daylight, with the sun shining for approximately 9 hours 49 minutes each day. Additionally, there is a 53% probability of sunny days during this period.

193 mm (7.6 inches)

Precipitation

13 rainy days

Rainy days

9 hours 49 minutes

Sunshine hours

53%

Chance of sun

UV Index

In September, the UV Index in Northwest reaches a maximum of 9, 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 4 7 8 9 9 7 5 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

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