September Weather in Northfield, United States

Last updated: June 24, 2025

In Northfield, United States, the average temperature in September hovers around 15°C (59°F), offering a mild climate. Expect temperature fluctuations, with a minimum dipping to -5°C (23°F) and a maximum soaring up to 30°C (87°F). During this month, the region experiences an average precipitation of 79 mm (3.1 in) over 9 days, contributing to a humidity level of 78%. Whether you're enjoying the cool breezes or gearing up for occasional rain, Northfield has something to offer!

September Temperature in Northfield

In September in Northfield, the average temperature is 15°C (59°F). The maximum can reach 30°C (87°F), and the minimum can drop as low as -5°C (23°F). Be prepared for both warm days and chilly nights when traveling to Northfield during this month.

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

The chart illustrates September temperature patterns in Northfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Northfield, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec172128415463686659473223
Data source: Temperature data for Northfield 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 Northfield

In Northfield in September, the precipitation amount is 79 mm (3.1 in) spread over 9 days.

September Precipitation Trends in Northfield

The chart displays monthly precipitation patterns in Northfield, 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 Northfield, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8789841251101211401057915811792
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Northfield

In Northfield in September, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

September Average Humidity in Northfield

This chart illustrates the average monthly humidity levels in Northfield, 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 Northfield is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Northfield

In Northfield 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 Northfield.

Maximum UV Index Levels in Northfield for September

The chart shows the monthly maximum UV Index (UVI) for Northfield 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 Northfield typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Northfield 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 Northfield Compares to Other Months

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

This table compares monthly weather conditions in Northfield, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)87 mm (3.4 inches)93%low
February Weather-6°C (21°F)89 mm (3.5 inches)92%moderate
March Weather-2°C (28°F)84 mm (3.3 inches)86%moderate
April Weather5°C (41°F)125 mm (4.9 inches)85%very high
May Weather12°C (54°F)110 mm (4.3 inches)80%very high
June Weather17°C (63°F)121 mm (4.8 inches)74%very high
July Weather20°C (68°F)140 mm (5.5 inches)76%very high
August Weather19°C (66°F)104 mm (4.1 inches)75%very high
September Weather15°C (59°F)79 mm (3.1 inches)78%high
October Weather9°C (48°F)158 mm (6.2 inches)86%moderate
November Weather0°C (32°F)117 mm (4.6 inches)88%moderate
December Weather-5°C (23°F)92 mm (3.6 inches)89%low

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