September Weather in Massac, United States

Last updated: June 24, 2025

In September, the average temperature in Massac, United States hovers around 23°C (74°F), with extremes ranging from a brisk 9°C (49°F) to a sweltering 36°C (98°F). Expect a precipitation amount of 86 mm (3.4 in) over about 7 days, contributing to an average humidity of 75%. Whether you're enjoying the warmth or navigating the rain, the weather this month promises to be varied and captivating!

September Temperature in Massac

In September in Massac, the average temperature is 23°C (74°F). The maximum can reach 36°C (98°F) and the minimum can be as low as 9°C (49°F). It’s a great time to visit Massac for outdoor activities, so be prepared for a mix of warm and cooler days.

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

The chart illustrates September temperature patterns in Massac, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Massac, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (98°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Massac

In Massac in September, the total precipitation amount is 86 mm (3.4 in) over a span of 7 days.

September Precipitation Trends in Massac

The chart displays monthly precipitation patterns in Massac, 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 Massac, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 7 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 Massac

In Massac in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Massac

This chart illustrates the average monthly humidity levels in Massac, 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 Massac is approximately 75%, 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 Massac

In Massac 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 Massac.

Maximum UV Index Levels in Massac for September

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

Data source: Massac 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 Massac Compares to Other Months

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

This table compares monthly weather conditions in Massac, 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 (38°F)	106 mm (4.2 inches)	86%	moderate
February Weather	5°C (41°F)	146 mm (5.7 inches)	84%	high
March Weather	10°C (51°F)	156 mm (6.1 inches)	84%	high
April Weather	14°C (58°F)	142 mm (5.6 inches)	80%	very high
May Weather	21°C (70°F)	144 mm (5.7 inches)	82%	extreme
June Weather	25°C (77°F)	114 mm (4.5 inches)	83%	extreme
July Weather	27°C (81°F)	100 mm (3.9 inches)	79%	very high
August Weather	26°C (78°F)	95 mm (3.8 inches)	76%	very high
September Weather	23°C (74°F)	86 mm (3.4 inches)	75%	very high
October Weather	17°C (62°F)	122 mm (4.8 inches)	74%	high
November Weather	8°C (47°F)	99 mm (3.9 inches)	85%	moderate
December Weather	6°C (44°F)	103 mm (4.0 inches)	88%	moderate