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September Weather in Grandview, United States

Last updated: June 24, 2025

In September, the average temperature in Grandview, United States is a pleasant 21°C (71°F). Expect a minimum drop to 7°C (44°F) and the possibility of soaring up to 35°C (95°F). With an average humidity of 73%, you might feel the warmth even more. Rainfall is likely, with 79 mm (3.1 in) expected over about 8 days.

September Temperature in Grandview

In September in Grandview, the average temperature is 21°C (71°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop as low as 7°C (44°F). This makes Grandview a great destination for travelers who enjoy a mix of warm days and cooler evenings.

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 21°C (71°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec333745546673777570594338
Data source: Temperature data for Grandview generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Grandview

In Grandview in September, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

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 79 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7910413311612513011396799696104
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grandview

In Grandview in September humidity is 73%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities a bit uncomfortable, but with proper hydration and breaks in the shade, it’s still manageable for 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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
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 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 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)79 mm (3.1 inches)88%moderate
February Weather3°C (37°F)104 mm (4.1 inches)88%moderate
March Weather7°C (45°F)133 mm (5.2 inches)87%high
April Weather12°C (54°F)116 mm (4.5 inches)85%very high
May Weather19°C (66°F)125 mm (4.9 inches)81%very high
June Weather23°C (74°F)130 mm (5.1 inches)82%very high
July Weather25°C (78°F)113 mm (4.4 inches)81%very high
August Weather24°C (75°F)96 mm (3.8 inches)73%very high
September Weather21°C (71°F)79 mm (3.1 inches)73%very high
October Weather15°C (59°F)96 mm (3.8 inches)78%high
November Weather6°C (44°F)96 mm (3.8 inches)89%moderate
December Weather4°C (39°F)104 mm (4.1 inches)87%moderate

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