September Weather in Old Town, United States

Last updated: June 24, 2025

In Old Town, United States, the average temperature in September hovers around 16°C (61°F). Expect a minimum of 1°C (33°F) and a maximum of 32°C (90°F). During this month, precipitation totals approximately 76 mm (3.0 in) over 7 days, while the air maintains an average humidity of 77%.

September Temperature in Old Town

In September in Old Town, the average temperature is 16°C (61°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as 1°C (33°F). It's a great time to visit for those who enjoy mild temperatures during the day and cooler evenings.

September Weather in Old Town: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Old Town, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Old Town, September typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (90°F) and lows dropping to around 1°C (33°F).

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

September Precipitation in Old Town

In Old Town in September, the precipitation amount is 76 mm (3.0 in) over a period of 7 days.

September Precipitation Trends in Old Town

The chart displays monthly precipitation patterns in Old Town, 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 Old Town, September typically receives around 76 mm (3.0 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 Old Town

In Old Town in September humidity is 77%. With an average temperature of 16°C (61°F), this humidity feels like a slight heaviness in the air, making every step feel a touch more effortful while traveling. The dampness clings to your skin, adding a layer of discomfort, yet the mild temperature invites you to explore the surroundings, blending the challenge of the humidity with an opportunity for a refreshing adventure.

September Average Humidity in Old Town

This chart illustrates the average monthly humidity levels in Old Town, 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 Old Town 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 Old Town

In Old Town 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 Old Town.

Maximum UV Index Levels in Old Town for September

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

Data source: Old Town 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 Old Town Compares to Other Months

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

This table compares monthly weather conditions in Old Town, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	90 mm (3.6 inches)	88%	low
February Weather	-5°C (23°F)	82 mm (3.2 inches)	88%	moderate
March Weather	-1°C (30°F)	72 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	125 mm (4.9 inches)	81%	high
May Weather	12°C (54°F)	98 mm (3.9 inches)	76%	very high
June Weather	18°C (64°F)	88 mm (3.5 inches)	74%	very high
July Weather	21°C (70°F)	96 mm (3.8 inches)	74%	very high
August Weather	20°C (69°F)	78 mm (3.1 inches)	74%	very high
September Weather	16°C (61°F)	76 mm (3.0 inches)	77%	high
October Weather	10°C (50°F)	119 mm (4.7 inches)	82%	moderate
November Weather	2°C (36°F)	119 mm (4.7 inches)	85%	moderate
December Weather	-4°C (26°F)	116 mm (4.6 inches)	84%	low