September Weather in Northfield, United States

Last updated: June 24, 2025

In September, the average temperature in Northfield, United States is a delightful 22°C (72°F). Expect a cozy minimum of 13°C (56°F) and a warm maximum reaching 29°C (85°F). However, don't forget your rain gear, as 122 mm (4.8 in) of precipitation can be expected over 9 days. With an average humidity of 74%, it's the perfect time to enjoy the lush greenery this climate fosters!

September Temperature in Northfield

In September in Northfield, the average temperature is 22°C (72°F). Maximum temperatures can reach 29°C (85°F), while minimums can dip as low as 13°C (56°F). This mild and comfortable climate makes Northfield an ideal destination for travelers looking to explore and enjoy outdoor activities.

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 22°C (72°F), with highs reaching up to 29°C (85°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Northfield

In Northfield in September, the precipitation amount is 122 mm (4.8 in) over a span of 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 122 mm (4.8 inches) of precipitation spread over approximately 9 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 Northfield

In Northfield in September, humidity is 74%. With an average temperature of 22°C (72°F), this humidity feels like a warm blanket enveloping you, making it a bit uncomfortable for traveling, as every step feels heavier and the air is thick.

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 74%, 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 Northfield

In Northfield 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 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 8, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	79 mm (3.1 inches)	83%	moderate
February Weather	4°C (40°F)	117 mm (4.6 inches)	82%	moderate
March Weather	6°C (43°F)	111 mm (4.4 inches)	81%	high
April Weather	11°C (51°F)	98 mm (3.9 inches)	79%	very high
May Weather	15°C (60°F)	115 mm (4.5 inches)	74%	very high
June Weather	21°C (70°F)	69 mm (2.7 inches)	77%	very high
July Weather	25°C (77°F)	109 mm (4.3 inches)	76%	very high
August Weather	24°C (76°F)	97 mm (3.8 inches)	77%	very high
September Weather	22°C (72°F)	122 mm (4.8 inches)	74%	very high
October Weather	18°C (64°F)	152 mm (6.0 inches)	75%	high
November Weather	11°C (51°F)	94 mm (3.7 inches)	80%	moderate
December Weather	6°C (44°F)	121 mm (4.8 inches)	81%	moderate