September Weather in South Ashburnham, United States

Last updated: June 24, 2025

In September, the average temperature in South Ashburnham, United States is a pleasant 18°C (65°F). Expect a minimum of 2°C (37°F) and a maximum of 33°C (92°F), allowing for a variety of weather experiences. During this month, precipitation totals around 89 mm (3.5 in), falling over 8 days, and with an average humidity of 71%, it's wise to prepare for a mix of sun and showers!

September Temperature in South Ashburnham

In September in South Ashburnham, the average temperature is 18°C (65°F). The maximum can reach 33°C (92°F), while the minimum can be as low as 2°C (37°F). This makes South Ashburnham an ideal destination for travelers seeking a mix of warm days and cooler evenings, perfect for exploring outdoor activities.

September Weather in South Ashburnham: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in South Ashburnham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Ashburnham, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (37°F).

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

September Precipitation in South Ashburnham

In South Ashburnham in September, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.

September Precipitation Trends in South Ashburnham

The chart displays monthly precipitation patterns in South Ashburnham, 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 South Ashburnham, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 8 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 South Ashburnham

In South Ashburnham in September humidity is 71%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making it a bit sticky and muggy, which can be slightly uncomfortable for traveling, especially if you're engaging in outdoor activities or exploring the city on foot.

September Average Humidity in South Ashburnham

This chart illustrates the average monthly humidity levels in South Ashburnham, 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 South Ashburnham is approximately 71%, 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 South Ashburnham

In South Ashburnham 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 South Ashburnham.

Maximum UV Index Levels in South Ashburnham for September

The chart shows the monthly maximum UV Index (UVI) for South Ashburnham 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 South Ashburnham typically reaches 8, which falls under the very high exposure category.

Data source: South Ashburnham 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 South Ashburnham Compares to Other Months

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

This table compares monthly weather conditions in South Ashburnham, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	76 mm (3.0 inches)	86%	moderate
February Weather	-1°C (30°F)	90 mm (3.6 inches)	84%	moderate
March Weather	2°C (35°F)	86 mm (3.4 inches)	82%	high
April Weather	8°C (47°F)	131 mm (5.2 inches)	80%	very high
May Weather	14°C (58°F)	92 mm (3.6 inches)	72%	very high
June Weather	20°C (68°F)	89 mm (3.5 inches)	72%	very high
July Weather	23°C (73°F)	150 mm (5.9 inches)	67%	very high
August Weather	22°C (72°F)	94 mm (3.7 inches)	66%	very high
September Weather	18°C (65°F)	89 mm (3.5 inches)	71%	very high
October Weather	12°C (54°F)	136 mm (5.4 inches)	78%	high
November Weather	4°C (40°F)	102 mm (4.0 inches)	84%	moderate
December Weather	-1°C (31°F)	126 mm (5.0 inches)	81%	low