September Weather in New Salem, United States

Last updated: June 24, 2025

In New Salem, United States, the average temperature in September hovers around 18°C (65°F), with a minimum drop to 2°C (35°F) and a maximum reach of 33°C (91°F). Expect about 85 mm (3.4 in) of precipitation spread over 8 days, contributing to an average humidity of 71%. Whether you prefer the refreshing coolness or the warmth of sunny days, September has a little something for everyone!

September Temperature in New Salem

In September in New Salem, the average temperature is 18°C (65°F). The maximum can reach 33°C (91°F), while the minimum can be as low as 2°C (35°F). Pack accordingly for a varied climate to fully enjoy your trip to New Salem.

September Weather in New Salem: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in New Salem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Salem, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec272935465768737264544031
Data source: Temperature data for New Salem 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 New Salem

In New Salem in September, the precipitation amount is 85 mm (3.4 in) over the course of 8 days.

September Precipitation Trends in New Salem

The chart displays monthly precipitation patterns in New Salem, 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 New Salem, September typically receives around 85 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7589831279078135808513398123
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in New Salem

In New Salem in September humidity is 71%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making it a bit sticky and muggy, which can be slightly uncomfortable for traveling, especially if you're engaging in outdoor activities or exploring the city on foot.

September Average Humidity in New Salem

This chart illustrates the average monthly humidity levels in New Salem, 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 New Salem is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in New Salem

In New Salem 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 New Salem.

Maximum UV Index Levels in New Salem for September

The chart shows the monthly maximum UV Index (UVI) for New Salem 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 New Salem typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
Data source: New Salem 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 New Salem Compares to Other Months

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

This table compares monthly weather conditions in New Salem, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)75 mm (3.0 inches)86%moderate
February Weather-1°C (30°F)89 mm (3.5 inches)84%moderate
March Weather2°C (35°F)83 mm (3.3 inches)82%high
April Weather8°C (46°F)126 mm (5.0 inches)80%very high
May Weather14°C (58°F)90 mm (3.6 inches)72%very high
June Weather20°C (68°F)78 mm (3.1 inches)72%very high
July Weather23°C (73°F)135 mm (5.3 inches)67%very high
August Weather22°C (72°F)80 mm (3.1 inches)66%very high
September Weather18°C (65°F)85 mm (3.4 inches)71%very high
October Weather12°C (54°F)133 mm (5.2 inches)78%high
November Weather4°C (40°F)98 mm (3.9 inches)84%moderate
December Weather-1°C (31°F)123 mm (4.8 inches)81%low

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