nomadseason

September Weather in Bethel, United States

Last updated: June 24, 2025

In September, the average temperature in Bethel, United States hovers around 15°C (59°F). Expect a chilly minimum of -3°C (27°F) and a pleasant maximum of 30°C (86°F). With 63 mm (2.5 in) of precipitation spread over 8 days, be prepared for some rain. The average humidity stands at a comfortable 77%, making it a month of varied yet intriguing weather!

September Temperature in Bethel

In September in Bethel, the average temperature is 15°C (59°F). Maximums can reach 30°C (86°F), while minimums can drop as low as -3°C (27°F). Pack accordingly to enjoy a varied climate during your travels!

September Weather in Bethel: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bethel, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bethel, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec172027405362676659473222
Data source: Temperature data for Bethel generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Bethel

In Bethel in September, the precipitation amount is 63 mm (2.5 in) spread over 8 days.

September Precipitation Trends in Bethel

The chart displays monthly precipitation patterns in Bethel, 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 Bethel, September typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec818570123879213510263122104109
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Bethel

In Bethel in September, humidity is 77%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it essential to stay hydrated and choose light, breathable clothing for comfortable travel.

September Average Humidity in Bethel

This chart illustrates the average monthly humidity levels in Bethel, 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 Bethel is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bethel

In Bethel in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Bethel.

Maximum UV Index Levels in Bethel for September

The chart shows the monthly maximum UV Index (UVI) for Bethel 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 Bethel typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2468910997532
Data source: Bethel 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 Bethel Compares to Other Months

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

This table compares monthly weather conditions in Bethel, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)81 mm (3.2 inches)91%low
February Weather-7°C (20°F)85 mm (3.4 inches)89%moderate
March Weather-3°C (27°F)70 mm (2.8 inches)85%high
April Weather4°C (40°F)123 mm (4.8 inches)84%very high
May Weather11°C (53°F)87 mm (3.4 inches)78%very high
June Weather17°C (63°F)91 mm (3.6 inches)72%very high
July Weather20°C (68°F)135 mm (5.3 inches)75%very high
August Weather19°C (66°F)102 mm (4.0 inches)74%very high
September Weather15°C (59°F)63 mm (2.5 inches)77%high
October Weather8°C (47°F)122 mm (4.8 inches)85%moderate
November Weather0°C (33°F)104 mm (4.1 inches)86%moderate
December Weather-6°C (22°F)109 mm (4.3 inches)85%low

Compare Bethel's Climate with Cities Worldwide