September Weather in Bethel, United States

Last updated: June 24, 2025

In September, the average temperature in Bethel, United States hovers around 24°C (75°F). However, temperatures can range from a cool 10°C (50°F) to a sweltering 36°C (96°F). Expect about 121 mm (4.8 in) of precipitation over approximately 10 days, and be prepared for a high average humidity of 79%, making it essential to stay hydrated and comfy!

September Temperature in Bethel

In September, in Bethel, the average temperature is 24°C (75°F). The maximum can reach 36°C (96°F), and the minimum can be as low as 10°C (50°F). This range makes Bethel an ideal destination for travelers seeking warm weather during the day while being prepared for cooler evenings.

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 24°C (75°F), with highs reaching up to 36°C (96°F) and lows dropping to around 10°C (50°F).

Data source: Temperature data for Bethel generated using information from the Copernicus Climate Change Service.

September Precipitation in Bethel

In Bethel in September, the precipitation amount is 121 mm (4.8 in) spread over a period of 10 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 121 mm (4.8 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Bethel

In Bethel in September, humidity is 79%. With an average temperature of 24°C (75°F), this humidity feels like a warm, tropical embrace, making traveling quite sticky and requiring ample hydration and light clothing to keep comfortable while exploring.

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 79%, offering insight into how humid the weather typically is during this month.

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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	91 mm (3.6 inches)	85%	moderate
February Weather	10°C (50°F)	90 mm (3.5 inches)	82%	high
March Weather	12°C (53°F)	69 mm (2.7 inches)	81%	very high
April Weather	17°C (63°F)	100 mm (4.0 inches)	80%	very high
May Weather	21°C (71°F)	108 mm (4.2 inches)	81%	extreme
June Weather	25°C (77°F)	129 mm (5.1 inches)	81%	very high
July Weather	27°C (81°F)	122 mm (4.8 inches)	81%	extreme
August Weather	26°C (79°F)	153 mm (6.0 inches)	80%	very high
September Weather	24°C (75°F)	121 mm (4.8 inches)	79%	very high
October Weather	19°C (67°F)	76 mm (3.0 inches)	80%	very high
November Weather	11°C (53°F)	92 mm (3.6 inches)	85%	moderate
December Weather	9°C (48°F)	99 mm (3.9 inches)	86%	moderate