September Weather in Grandview, United States

Last updated: June 24, 2025

In September, the average temperature in Grandview, United States stands at a pleasant 20°C (68°F). However, be prepared for a possible minimum of 4°C (40°F) and a sweltering maximum of 40°C (104°F). During this month, expect 9 mm (0.4 in) of precipitation spread over 3 days, alongside an average humidity of 62%. Stay comfortable and enjoy your time!

September Temperature in Grandview

In September in Grandview, the average temperature is 20°C (68°F). The maximum can reach 40°C (104°F), while the minimum can drop as low as 4°C (40°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates September temperature patterns in Grandview, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grandview, September typically has an average temperature of 20°C (68°F), with highs reaching up to 40°C (104°F) and lows dropping to around 4°C (40°F).

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

September Precipitation in Grandview

In Grandview in September, the precipitation amount is 9 mm (0.4 in) over a span of 3 days.

September Precipitation Trends in Grandview

The chart displays monthly precipitation patterns in Grandview, 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 Grandview, September typically receives around 9 mm (0.4 inches) of precipitation spread over approximately 3 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 Grandview

In Grandview in September, humidity is 62%. With an average temperature of 20°C (68°F), this humidity feels like a warm, balmy embrace that can make outdoor activities enjoyable in the early morning and late afternoon, but can become quite stifling during the midday heat, making it advisable to stay hydrated and take breaks in shaded areas while traveling.

September Average Humidity in Grandview

This chart illustrates the average monthly humidity levels in Grandview, 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 Grandview is approximately 62%, 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 Grandview

In Grandview 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 Grandview.

Maximum UV Index Levels in Grandview for September

The chart shows the monthly maximum UV Index (UVI) for Grandview 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 Grandview typically reaches 7, which falls under the high exposure category.

Data source: Grandview 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 Grandview Compares to Other Months

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

This table compares monthly weather conditions in Grandview, 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 (34°F)	43 mm (1.7 inches)	86%	low
February Weather	2°C (36°F)	43 mm (1.7 inches)	86%	moderate
March Weather	7°C (45°F)	25 mm (1.0 inches)	87%	moderate
April Weather	12°C (54°F)	24 mm (1.0 inches)	84%	high
May Weather	18°C (65°F)	16 mm (0.6 inches)	81%	very high
June Weather	23°C (73°F)	7 mm (0.3 inches)	82%	very high
July Weather	27°C (80°F)	1 mm (0.0 inches)	79%	very high
August Weather	26°C (79°F)	5 mm (0.2 inches)	63%	very high
September Weather	20°C (68°F)	9 mm (0.4 inches)	62%	high
October Weather	12°C (53°F)	26 mm (1.0 inches)	83%	moderate
November Weather	5°C (42°F)	31 mm (1.2 inches)	89%	moderate
December Weather	1°C (35°F)	35 mm (1.4 inches)	88%	low