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September Weather in Nittany, United States

Last updated: June 24, 2025

In Nittany, United States, the average temperature in September hovers around 18°C (65°F). However, be prepared for a chilly dip to a minimum of 2°C (36°F), while the mercury can soar to a maximum of 32°C (90°F). During this month, you can expect 125 mm (4.9 in) of precipitation spread over about 10 days, contributing to an average humidity of 67%. Enjoy the climatic diversity!

September Temperature in Nittany

In September in Nittany, the average temperature is 18°C (65°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 2°C (36°F). This wide range of temperatures makes it essential for travelers to pack both light clothing for warm days and warm layers for cooler nights.

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

The chart illustrates September temperature patterns in Nittany, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nittany, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec283138495968737265554033
Data source: Temperature data for Nittany generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Nittany

In Nittany in September, the precipitation amount is 125 mm (4.9 in) spread over a period of 10 days.

September Precipitation Trends in Nittany

The chart displays monthly precipitation patterns in Nittany, 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 Nittany, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec71104891121361071371071251208793
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Nittany

In Nittany in September humidity is 67%. With an average temperature of 18°C (65°F), this humidity feels like a mild blanket wrapping around you, making outdoor activities feel pleasantly refreshing, yet you may find yourself reaching for a drink more often to stay hydrated while exploring the sights.

September Average Humidity in Nittany

This chart illustrates the average monthly humidity levels in Nittany, 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 Nittany is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Nittany

In Nittany 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 Nittany.

Maximum UV Index Levels in Nittany for September

The chart shows the monthly maximum UV Index (UVI) for Nittany 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 Nittany typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Nittany 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 Nittany Compares to Other Months

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

This table compares monthly weather conditions in Nittany, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)71 mm (2.8 inches)89%moderate
February Weather0°C (31°F)104 mm (4.1 inches)90%moderate
March Weather3°C (38°F)89 mm (3.5 inches)89%high
April Weather9°C (49°F)112 mm (4.4 inches)88%very high
May Weather15°C (60°F)136 mm (5.4 inches)80%very high
June Weather20°C (68°F)107 mm (4.2 inches)79%very high
July Weather23°C (74°F)137 mm (5.4 inches)74%very high
August Weather22°C (72°F)107 mm (4.2 inches)64%very high
September Weather18°C (65°F)125 mm (4.9 inches)67%very high
October Weather13°C (55°F)120 mm (4.7 inches)81%high
November Weather4°C (40°F)87 mm (3.4 inches)89%moderate
December Weather1°C (34°F)93 mm (3.7 inches)88%low

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