September Weather in Somerset, United States

Last updated: June 24, 2025

In September, the average temperature in Somerset, United States hovers around 22°C (72°F), making it a pleasant time to visit. However, be prepared for temperature fluctuations, as minimums can drop to 8°C (47°F) while maximums can soar to 36°C (97°F). Expect some rain, with a total precipitation of 117 mm (4.6 in) over about 9 days. The average humidity is around 67%, adding a touch of moisture to the air.

September Temperature in Somerset

In September in Somerset, the average temperature is 22°C (72°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 8°C (47°F). This weather makes it an ideal time for outdoor activities and exploring the local attractions while enjoying comfortable temperatures.

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

The chart illustrates September temperature patterns in Somerset, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Somerset, September typically has an average temperature of 22°C (72°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Somerset

In Somerset in September, the total precipitation amount is 117 mm (4.6 in) spread over a period of 9 days.

September Precipitation Trends in Somerset

The chart displays monthly precipitation patterns in Somerset, 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 Somerset, September typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Somerset

In Somerset in September humidity is 67%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, creating a tropical ambiance that can be both refreshing and slightly stifling for traveling.

September Average Humidity in Somerset

This chart illustrates the average monthly humidity levels in Somerset, 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 Somerset is approximately 67%, 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 Somerset

In Somerset 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 Somerset.

Maximum UV Index Levels in Somerset for September

The chart shows the monthly maximum UV Index (UVI) for Somerset 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 Somerset typically reaches 9, which falls under the very high exposure category.

Data source: Somerset 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 Somerset Compares to Other Months

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

This table compares monthly weather conditions in Somerset, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	99 mm (3.9 inches)	88%	moderate
February Weather	7°C (44°F)	185 mm (7.3 inches)	88%	high
March Weather	10°C (51°F)	149 mm (5.9 inches)	87%	high
April Weather	14°C (58°F)	139 mm (5.5 inches)	84%	very high
May Weather	20°C (68°F)	128 mm (5.0 inches)	84%	extreme
June Weather	23°C (74°F)	142 mm (5.6 inches)	83%	extreme
July Weather	26°C (79°F)	104 mm (4.1 inches)	79%	extreme
August Weather	25°C (77°F)	120 mm (4.7 inches)	66%	very high
September Weather	22°C (72°F)	117 mm (4.6 inches)	67%	very high
October Weather	17°C (62°F)	121 mm (4.8 inches)	76%	high
November Weather	9°C (48°F)	78 mm (3.1 inches)	89%	moderate
December Weather	6°C (44°F)	139 mm (5.5 inches)	88%	moderate