September Weather in Northfield, United States

Last updated: June 24, 2025

In Northfield, United States, the average temperature in September hovers around 22°C (72°F), offering a pleasant climate for all. Expect a minimum temperature of 8°C (47°F) and a maximum reaching up to 36°C (97°F), showcasing the range of weather you might experience. With an average precipitation of 112 mm (4.4 in) over 8 days, and humidity levels at 69%, it’s wise to prepare for some damp days amid the warmth.

September Temperature in Northfield

In September in Northfield, the average temperature is 22°C (72°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 8°C (47°F). This weather makes it an ideal time for outdoor activities and exploring the local attractions while enjoying comfortable temperatures.

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 36°C (97°F) and lows dropping to around 8°C (47°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 total precipitation amount is 112 mm (4.4 in) spread over 8 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 112 mm (4.4 inches) of precipitation spread over approximately 8 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 69%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket, making travel feel sticky and slightly oppressive, yet also invigorating as the air is thick with the scent of blooming flora and vibrant surroundings.

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 69%, 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	2°C (35°F)	87 mm (3.4 inches)	87%	moderate
February Weather	4°C (40°F)	128 mm (5.0 inches)	85%	moderate
March Weather	9°C (48°F)	132 mm (5.2 inches)	86%	high
April Weather	13°C (56°F)	137 mm (5.4 inches)	84%	very high
May Weather	20°C (67°F)	128 mm (5.0 inches)	79%	very high
June Weather	24°C (75°F)	151 mm (5.9 inches)	82%	extreme
July Weather	26°C (79°F)	98 mm (3.9 inches)	79%	very high
August Weather	25°C (76°F)	94 mm (3.7 inches)	70%	very high
September Weather	22°C (72°F)	112 mm (4.4 inches)	69%	very high
October Weather	16°C (60°F)	98 mm (3.9 inches)	76%	high
November Weather	7°C (45°F)	88 mm (3.5 inches)	88%	moderate
December Weather	5°C (41°F)	106 mm (4.2 inches)	87%	moderate