September Weather in Stewartstown, United States

Last updated: June 24, 2025

In Stewartstown, United States, the average temperature in September hovers around 21°C (70°F), offering a pleasant climate. However, be prepared for fluctuations, as temperatures can dip as low as 5°C (41°F) and soar up to 33°C (92°F). Expect 120 mm (4.7 in) of precipitation spread across about 10 days, contributing to an average humidity level of 75%. Embrace the gentle warmth while staying prepared for occasional showers!

September Temperature in Stewartstown

In September in Stewartstown, the average temperature is 21°C (70°F). The maximum can reach 33°C (92°F), while the minimum can dip as low as 5°C (41°F). This climate makes Stewartstown an ideal destination for travelers looking to enjoy pleasant weather with a good range of temperatures.

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

The chart illustrates September temperature patterns in Stewartstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stewartstown, September typically has an average temperature of 21°C (70°F), with highs reaching up to 33°C (92°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Stewartstown

In Stewartstown in September, the precipitation amount is 120 mm (4.7 in) spread over a duration of 10 days.

September Precipitation Trends in Stewartstown

The chart displays monthly precipitation patterns in Stewartstown, 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 Stewartstown, September typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Stewartstown

In Stewartstown in September, humidity is 75%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that makes exploring the area feel slightly sticky, requiring travelers to stay hydrated and take occasional breaks in the shade to fully enjoy their adventures.

September Average Humidity in Stewartstown

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

In Stewartstown 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 Stewartstown.

Maximum UV Index Levels in Stewartstown for September

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

Data source: Stewartstown 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 Stewartstown Compares to Other Months

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

This table compares monthly weather conditions in Stewartstown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	60 mm (2.4 inches)	84%	moderate
February Weather	3°C (38°F)	97 mm (3.8 inches)	83%	moderate
March Weather	6°C (44°F)	99 mm (3.9 inches)	83%	high
April Weather	12°C (54°F)	101 mm (4.0 inches)	81%	very high
May Weather	18°C (64°F)	140 mm (5.5 inches)	78%	very high
June Weather	23°C (73°F)	116 mm (4.6 inches)	79%	very high
July Weather	26°C (78°F)	153 mm (6.0 inches)	74%	very high
August Weather	24°C (75°F)	150 mm (5.9 inches)	72%	very high
September Weather	21°C (70°F)	120 mm (4.7 inches)	75%	very high
October Weather	15°C (60°F)	103 mm (4.1 inches)	81%	high
November Weather	7°C (45°F)	91 mm (3.6 inches)	85%	moderate
December Weather	3°C (39°F)	95 mm (3.8 inches)	84%	moderate