September Weather in Grant, United States

Last updated: June 24, 2025

In Grant, United States, the average temperature in September hovers around 20°C (68°F). While you can expect milder days, temperatures can dip to a chilly 2°C (35°F) at their lowest and soar as high as a scorching 39°C (102°F). Rainfall is a moderate concern, with 44 mm (1.7 in) recorded over about 5 days. The air tends to be quite humid, averaging around 70%.

September Temperature in Grant

In September in Grant, the average temperature is 20°C (68°F). Maximum temperatures can reach 39°C (102°F), while minimums can drop as low as 2°C (35°F). This range makes Grant an ideal destination for travelers seeking a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Grant, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grant, September typically has an average temperature of 20°C (68°F), with highs reaching up to 39°C (102°F) and lows dropping to around 2°C (35°F).

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

September Precipitation in Grant

In Grant in September, the precipitation amount is 44 mm (1.7 in) over the course of 5 days.

September Precipitation Trends in Grant

The chart displays monthly precipitation patterns in Grant, 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 Grant, September typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 5 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 Grant

In Grant in September, humidity is 70%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace that can make traveling a bit heavy and sticky but also invigorating, as the moisture in the air invigorates your skin and keeps you refreshed during your adventures.

September Average Humidity in Grant

This chart illustrates the average monthly humidity levels in Grant, 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 Grant is approximately 70%, 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 Grant

In Grant 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 Grant.

Maximum UV Index Levels in Grant for September

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

Data source: Grant 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 Grant Compares to Other Months

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

This table compares monthly weather conditions in Grant, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	15 mm (0.6 inches)	73%	moderate
February Weather	-2°C (29°F)	16 mm (0.6 inches)	80%	moderate
March Weather	5°C (42°F)	62 mm (2.4 inches)	64%	high
April Weather	9°C (49°F)	52 mm (2.1 inches)	64%	very high
May Weather	15°C (59°F)	113 mm (4.5 inches)	76%	very high
June Weather	23°C (73°F)	46 mm (1.8 inches)	79%	extreme
July Weather	25°C (77°F)	58 mm (2.3 inches)	77%	extreme
August Weather	23°C (74°F)	58 mm (2.3 inches)	79%	very high
September Weather	20°C (68°F)	44 mm (1.7 inches)	70%	very high
October Weather	10°C (50°F)	37 mm (1.5 inches)	64%	high
November Weather	5°C (42°F)	17 mm (0.7 inches)	75%	moderate
December Weather	1°C (34°F)	18 mm (0.7 inches)	78%	moderate