September Weather in Erma, United States

Last updated: June 24, 2025

In Erma, United States, the average temperature in September hovers around 22°C (72°F), creating a pleasant atmosphere. Expect the minimum to dip to 13°C (56°F) and the maximum to rise to 29°C (85°F). During this month, you're likely to encounter about 107 mm (4.2 in) of precipitation spread over 10 days, with average humidity levels sitting at a comfortable 75%.

September Temperature in Erma

In September in Erma, the average temperature is 22°C (72°F). Maximum temperatures can reach 29°C (85°F), while minimums can dip as low as 13°C (56°F). This mild and comfortable climate makes Erma an ideal destination for travelers looking to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Erma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Erma, September typically has an average temperature of 22°C (72°F), with highs reaching up to 29°C (85°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Erma

In Erma in September, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.

September Precipitation Trends in Erma

The chart displays monthly precipitation patterns in Erma, 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 Erma, September typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 10 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 Erma

In Erma in September, humidity is 75%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet requiring travelers to stay hydrated and take breaks in shaded areas.

September Average Humidity in Erma

This chart illustrates the average monthly humidity levels in Erma, 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 Erma 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 Erma

In Erma 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 Erma.

Maximum UV Index Levels in Erma for September

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

Data source: Erma 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 Erma Compares to Other Months

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

This table compares monthly weather conditions in Erma, 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)	74 mm (2.9 inches)	84%	moderate
February Weather	5°C (40°F)	113 mm (4.4 inches)	83%	moderate
March Weather	7°C (44°F)	111 mm (4.4 inches)	83%	high
April Weather	11°C (53°F)	94 mm (3.7 inches)	81%	very high
May Weather	16°C (61°F)	125 mm (4.9 inches)	78%	very high
June Weather	22°C (71°F)	77 mm (3.0 inches)	79%	very high
July Weather	25°C (78°F)	129 mm (5.1 inches)	74%	very high
August Weather	25°C (77°F)	115 mm (4.5 inches)	72%	very high
September Weather	22°C (72°F)	107 mm (4.2 inches)	75%	very high
October Weather	18°C (64°F)	142 mm (5.6 inches)	81%	high
November Weather	10°C (51°F)	90 mm (3.5 inches)	85%	moderate
December Weather	6°C (44°F)	118 mm (4.6 inches)	84%	moderate