September Weather in Mattawamkeag, United States

Last updated: June 24, 2025

In Mattawamkeag, United States, the average temperature in September hovers around 15°C (60°F), providing a comfortable backdrop for outdoor activities. However, temperatures can vary significantly, with a minimum of -1°C (30°F) and a scorching maximum of 33°C (91°F). Expect some rain as well, with an average precipitation of 83 mm (3.3 in) spread over about 8 days. Coupled with an average humidity of 77%, September offers a diverse climate experience.

September Temperature in Mattawamkeag

In September in Mattawamkeag, the average temperature is 15°C (60°F), with maximums reaching 33°C (91°F) and minimums dipping as low as -1°C (30°F). This wide temperature range suggests that travelers should pack a variety of clothing to stay comfortable during their visit.

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

The chart illustrates September temperature patterns in Mattawamkeag, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mattawamkeag, September typically has an average temperature of 15°C (60°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (30°F).

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

September Precipitation in Mattawamkeag

In Mattawamkeag in September, the precipitation amount reaches 83 mm (3.3 in) over the course of 8 days.

September Precipitation Trends in Mattawamkeag

The chart displays monthly precipitation patterns in Mattawamkeag, 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 Mattawamkeag, September typically receives around 83 mm (3.3 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 Mattawamkeag

In Mattawamkeag in September, humidity is 77%. With an average temperature of 15°C (60°F), this humidity feels like you're wading through a warm, heavy blanket, making travel feel more exhausting and sticky than usual.

September Average Humidity in Mattawamkeag

This chart illustrates the average monthly humidity levels in Mattawamkeag, 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 Mattawamkeag is approximately 77%, 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 Mattawamkeag

In Mattawamkeag 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 Mattawamkeag.

Maximum UV Index Levels in Mattawamkeag for September

The chart shows the monthly maximum UV Index (UVI) for Mattawamkeag 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 Mattawamkeag typically reaches 7, which falls under the high exposure category.

Data source: Mattawamkeag 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 Mattawamkeag Compares to Other Months

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

This table compares monthly weather conditions in Mattawamkeag, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (19°F)	93 mm (3.7 inches)	88%	low
February Weather	-6°C (21°F)	85 mm (3.3 inches)	88%	moderate
March Weather	-2°C (28°F)	74 mm (2.9 inches)	85%	moderate
April Weather	5°C (42°F)	117 mm (4.6 inches)	81%	high
May Weather	12°C (53°F)	100 mm (3.9 inches)	76%	very high
June Weather	17°C (63°F)	86 mm (3.4 inches)	74%	very high
July Weather	20°C (69°F)	96 mm (3.8 inches)	74%	very high
August Weather	20°C (68°F)	80 mm (3.2 inches)	74%	very high
September Weather	15°C (60°F)	83 mm (3.3 inches)	77%	high
October Weather	9°C (49°F)	116 mm (4.6 inches)	82%	moderate
November Weather	1°C (35°F)	120 mm (4.7 inches)	85%	moderate
December Weather	-5°C (24°F)	115 mm (4.5 inches)	84%	low