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September Weather in Wood River, United States

Last updated: June 24, 2025

In September, the average temperature in Wood River, United States is a pleasant 21°C (69°F). Expect a range from a cool 4°C (40°F) to a warm 36°C (97°F). Although you may enjoy the warmth, be prepared for 56 mm (2.2 in) of precipitation over 6 days, contributing to an average humidity of 77%.

September Temperature in Wood River

In September in Wood River, the average temperature is 21°C (69°F). Maximum temperatures can reach 36°C (97°F), while the minimum can drop as low as 4°C (40°F). This diverse range of temperatures makes Wood River an ideal destination for travelers seeking both warm days and cooler evenings.

September Weather in Wood River: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Wood River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wood River, September typically has an average temperature of 21°C (69°F), with highs reaching up to 36°C (97°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec272641506175777469524131
Data source: Temperature data for Wood River generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Wood River

In Wood River in September, the precipitation amount is 56 mm (2.2 in) spread over 6 days.

September Precipitation Trends in Wood River

The chart displays monthly precipitation patterns in Wood River, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Wood River, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec2719875215477717356822141
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Wood River

In Wood River in September humidity is 77%. With an average temperature of 21°C (69°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities both invigorating and somewhat sluggish for traveling.

September Average Humidity in Wood River

This chart illustrates the average monthly humidity levels in Wood River, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Wood River is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%81%69%71%80%83%84%84%77%72%80%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Wood River

In Wood River in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Wood River.

Maximum UV Index Levels in Wood River for September

The chart shows the monthly maximum UV Index (UVI) for Wood River in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Wood River typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101110108643
Data source: Wood River September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Wood River Compares to Other Months

Weather in Wood River varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Wood River, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Wood River, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)27 mm (1.1 inches)73%moderate
February Weather-3°C (26°F)19 mm (0.7 inches)81%moderate
March Weather5°C (41°F)87 mm (3.4 inches)69%high
April Weather10°C (50°F)52 mm (2.0 inches)71%very high
May Weather16°C (62°F)154 mm (6.1 inches)80%very high
June Weather24°C (75°F)77 mm (3.0 inches)83%extreme
July Weather25°C (78°F)71 mm (2.8 inches)84%very high
August Weather24°C (75°F)73 mm (2.9 inches)84%very high
September Weather21°C (69°F)56 mm (2.2 inches)77%very high
October Weather11°C (52°F)82 mm (3.2 inches)72%high
November Weather5°C (41°F)21 mm (0.8 inches)80%moderate
December Weather0°C (32°F)41 mm (1.6 inches)79%moderate

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