September Weather in Hanover, United States

Last updated: June 24, 2025

In Hanover, United States, the average temperature in September hovers around 23°C (73°F). However, you might experience a refreshing dip as low as 8°C (46°F) or a sweltering peak of 37°C (100°F). During this time, expect about 103 mm (4.1 in) of precipitation spread over approximately 11 days, with an average humidity level of 78%. This blend of warm temperatures and moisture makes for a uniquely vibrant atmosphere!

September Temperature in Hanover

In September in Hanover, the average temperature is 23°C (73°F). Maximums can reach 37°C (100°F), and minimums can be as low as 8°C (46°F). Travelers should be prepared for a comfortable climate with warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Hanover, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hanover, September typically has an average temperature of 23°C (73°F), with highs reaching up to 37°C (100°F) and lows dropping to around 8°C (46°F).

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

September Precipitation in Hanover

In Hanover in September, the precipitation amount is 103 mm (4.1 in) spread over 11 days.

September Precipitation Trends in Hanover

The chart displays monthly precipitation patterns in Hanover, 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 Hanover, September typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 11 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 Hanover

In Hanover in September, humidity is 78%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities a little challenging but still enjoyable for travelers who appreciate a tropical atmosphere.

September Average Humidity in Hanover

This chart illustrates the average monthly humidity levels in Hanover, 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 Hanover is approximately 78%, 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 Hanover

In Hanover 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 Hanover.

Maximum UV Index Levels in Hanover for September

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

Data source: Hanover 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 Hanover Compares to Other Months

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

This table compares monthly weather conditions in Hanover, 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 (40°F)	66 mm (2.6 inches)	84%	moderate
February Weather	7°C (45°F)	97 mm (3.8 inches)	83%	high
March Weather	10°C (50°F)	79 mm (3.1 inches)	82%	high
April Weather	15°C (60°F)	107 mm (4.2 inches)	81%	very high
May Weather	20°C (68°F)	105 mm (4.1 inches)	80%	very high
June Weather	24°C (76°F)	130 mm (5.1 inches)	82%	very high
July Weather	27°C (81°F)	115 mm (4.5 inches)	81%	very high
August Weather	25°C (78°F)	175 mm (6.9 inches)	81%	very high
September Weather	23°C (73°F)	103 mm (4.1 inches)	78%	very high
October Weather	18°C (64°F)	123 mm (4.9 inches)	80%	high
November Weather	10°C (50°F)	74 mm (2.9 inches)	84%	moderate
December Weather	6°C (44°F)	91 mm (3.6 inches)	84%	moderate