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September Weather in Granger, United States

Last updated: June 24, 2025

In September, the average temperature in Granger, United States hovers around 27°C (80°F), making it a warm destination. However, temperatures can vary significantly, with lows of 11°C (51°F) and highs reaching 39°C (102°F). Visitors should also expect an average precipitation of 109 mm (4.3 in) spread over about 10 days, coupled with a comfortable humidity level of 66%.

September Temperature in Granger

In September in Granger, the average temperature is 27°C (80°F). Maximum temperatures can reach 39°C (102°F), while minimum temperatures can drop to as low as 11°C (51°F). Travelers should be prepared for warm days with occasional cool evenings.

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

The chart illustrates September temperature patterns in Granger, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Granger, September typically has an average temperature of 27°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec515263687682868680705955
Data source: Temperature data for Granger 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 Granger

In Granger in September, the precipitation amount is 109 mm (4.3 in) spread over 10 days.

September Precipitation Trends in Granger

The chart displays monthly precipitation patterns in Granger, 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 Granger, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec54657495168807699109945174
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Granger

In Granger in September, humidity is 66%. With an average temperature of 27°C (80°F), this humidity feels like a warm, sticky embrace, making travel a bit more challenging as you may find yourself perspiring more quickly while exploring, but it's also perfect for a refreshing dip in nearby waters.

September Average Humidity in Granger

This chart illustrates the average monthly humidity levels in Granger, 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 Granger is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Granger

In Granger in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Granger.

Maximum UV Index Levels in Granger for September

The chart shows the monthly maximum UV Index (UVI) for Granger 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 Granger typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121111864
Data source: Granger 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 Granger Compares to Other Months

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

This table compares monthly weather conditions in Granger, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)54 mm (2.1 inches)78%moderate
February Weather11°C (53°F)65 mm (2.6 inches)78%high
March Weather17°C (63°F)74 mm (2.9 inches)77%very high
April Weather20°C (68°F)94 mm (3.7 inches)78%extreme
May Weather25°C (76°F)168 mm (6.6 inches)82%extreme
June Weather28°C (82°F)79 mm (3.1 inches)78%extreme
July Weather30°C (86°F)76 mm (3.0 inches)69%extreme
August Weather30°C (87°F)99 mm (3.9 inches)63%extreme
September Weather27°C (80°F)109 mm (4.3 inches)66%extreme
October Weather21°C (71°F)94 mm (3.7 inches)73%very high
November Weather15°C (60°F)51 mm (2.0 inches)84%high
December Weather13°C (55°F)74 mm (2.9 inches)87%moderate

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