September Weather in Walnut Grove, United States

Last updated: June 24, 2025

In Walnut Grove, United States during September, the average temperature hovers around 24°C (76°F). However, don’t be surprised by the temperature extremes; it can dip to a chilly 11°C (51°F) or soar to a scorching 36°C (97°F). Expect about 101 mm (4.0 in) of precipitation spread over 8 days, and brace yourself for an average humidity of 73%, giving you that tropical feel!

September Temperature in Walnut Grove

In September in Walnut Grove, the average temperature is 24°C (76°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 11°C (51°F). It's a great time for travelers to enjoy a mix of warm days and cooler nights while exploring all that Walnut Grove has to offer.

September Weather in Walnut Grove: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Walnut Grove, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut Grove, September typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (97°F) and lows dropping to around 11°C (51°F).

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

September Precipitation in Walnut Grove

In Walnut Grove in September, the precipitation amount is 101 mm (4.0 in) spread over 8 days.

September Precipitation Trends in Walnut Grove

The chart displays monthly precipitation patterns in Walnut Grove, 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 Walnut Grove, September typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Walnut Grove

In Walnut Grove in September humidity is 73%. With an average temperature of 24°C (76°F), this humidity feels like a warm and sticky embrace, making travel slightly uncomfortable as the air thickens around you, prompting you to seek shade and stay hydrated.

September Average Humidity in Walnut Grove

This chart illustrates the average monthly humidity levels in Walnut Grove, 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 Walnut Grove is approximately 73%, 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 Walnut Grove

In Walnut Grove in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Walnut Grove.

Maximum UV Index Levels in Walnut Grove for September

The chart shows the monthly maximum UV Index (UVI) for Walnut Grove 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 Walnut Grove typically reaches 9, which falls under the very high exposure category.

Data source: Walnut Grove 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 Walnut Grove Compares to Other Months

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

This table compares monthly weather conditions in Walnut Grove, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	122 mm (4.8 inches)	85%	moderate
February Weather	10°C (51°F)	184 mm (7.2 inches)	84%	high
March Weather	14°C (57°F)	165 mm (6.5 inches)	82%	very high
April Weather	17°C (62°F)	157 mm (6.2 inches)	82%	very high
May Weather	22°C (72°F)	105 mm (4.1 inches)	81%	extreme
June Weather	25°C (77°F)	134 mm (5.3 inches)	77%	extreme
July Weather	27°C (80°F)	114 mm (4.5 inches)	77%	extreme
August Weather	26°C (79°F)	120 mm (4.7 inches)	72%	extreme
September Weather	24°C (76°F)	101 mm (4.0 inches)	73%	very high
October Weather	19°C (66°F)	128 mm (5.0 inches)	73%	high
November Weather	11°C (52°F)	80 mm (3.1 inches)	85%	high
December Weather	9°C (48°F)	150 mm (5.9 inches)	88%	moderate