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September Weather in Groom, United States

Last updated: June 24, 2025

In September, the average temperature in Groom, United States hovers around 22°C (71°F). However, you might experience a range, with lows dipping to 3°C (38°F) and highs soaring to 37°C (98°F). Expect a total precipitation of 52 mm (2.0 in) over approximately 6 days, contributing to an average humidity level of 72%.

September Temperature in Groom

In September in Groom, the average temperature is 22°C (71°F), with maximums reaching 37°C (98°F) and minimums dipping as low as 3°C (38°F). This diverse temperature range makes it essential to pack both light clothing for the warm days and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Groom, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Groom, September typically has an average temperature of 22°C (71°F), with highs reaching up to 37°C (98°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec383850566676797771574841
Data source: Temperature data for Groom 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 Groom

In Groom, in September, the precipitation amount is 52 mm (2.0 in) over the course of 6 days.

September Precipitation Trends in Groom

The chart displays monthly precipitation patterns in Groom, 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 Groom, September typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec211446357948424952631421
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Groom

In Groom in September humidity is 72%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making outdoor activities enjoyable but potentially sticky, urging travelers to stay hydrated and take breaks in the shade.

September Average Humidity in Groom

This chart illustrates the average monthly humidity levels in Groom, 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 Groom is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%64%70%78%81%82%78%72%73%81%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Groom

In Groom in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Groom.

Maximum UV Index Levels in Groom for September

The chart shows the monthly maximum UV Index (UVI) for Groom 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 Groom typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111112121110754
Data source: Groom 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 Groom Compares to Other Months

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

This table compares monthly weather conditions in Groom, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)21 mm (0.8 inches)75%moderate
February Weather4°C (39°F)14 mm (0.6 inches)76%high
March Weather10°C (50°F)46 mm (1.8 inches)64%very high
April Weather14°C (57°F)35 mm (1.4 inches)70%extreme
May Weather19°C (67°F)79 mm (3.1 inches)78%extreme
June Weather24°C (76°F)48 mm (1.9 inches)81%extreme
July Weather26°C (79°F)42 mm (1.7 inches)82%extreme
August Weather25°C (78°F)49 mm (1.9 inches)78%extreme
September Weather22°C (71°F)52 mm (2.0 inches)72%very high
October Weather14°C (58°F)63 mm (2.5 inches)73%high
November Weather9°C (48°F)14 mm (0.5 inches)80%moderate
December Weather5°C (41°F)21 mm (0.8 inches)81%moderate

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