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September Weather in Calvert, United States

Last updated: June 24, 2025

In September, the average temperature in Calvert, United States hovers around 27°C (81°F), but don’t be surprised by the extremes—lows can plunge to 10°C (51°F) while highs can soar to a sweltering 40°C (104°F). Expect approximately 111 mm (4.4 in) of precipitation spread over 10 days, with an average humidity of 69% adding to the tropical feel of the month.

September Temperature in Calvert

In September in Calvert, the average temperature is 27°C (81°F), with maximums reaching up to 40°C (104°F) and minimums dipping as low as 10°C (51°F). Be prepared for both hot days and cooler nights while enjoying your travels.

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

The chart illustrates September temperature patterns in Calvert, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Calvert, September typically has an average temperature of 27°C (81°F), with highs reaching up to 40°C (104°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec515363687682868781716055
Data source: Temperature data for Calvert 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 Calvert

In Calvert in September, the precipitation amount is 111 mm (4.4 in) over a span of 10 days.

September Precipitation Trends in Calvert

The chart displays monthly precipitation patterns in Calvert, 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 Calvert, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec69838012415993631051111027094
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Calvert

In Calvert in September, humidity is 69%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket wrapped around you, making it essential to stay hydrated and take frequent breaks during your travels.

September Average Humidity in Calvert

This chart illustrates the average monthly humidity levels in Calvert, 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 Calvert is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Calvert

In Calvert 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 Calvert.

Maximum UV Index Levels in Calvert for September

The chart shows the monthly maximum UV Index (UVI) for Calvert 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 Calvert typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec578111112121110864
Data source: Calvert 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 Calvert Compares to Other Months

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

This table compares monthly weather conditions in Calvert, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)69 mm (2.7 inches)79%moderate
February Weather12°C (53°F)83 mm (3.3 inches)80%high
March Weather17°C (63°F)80 mm (3.2 inches)78%very high
April Weather20°C (68°F)124 mm (4.9 inches)79%extreme
May Weather25°C (77°F)159 mm (6.3 inches)81%extreme
June Weather28°C (83°F)93 mm (3.7 inches)77%extreme
July Weather30°C (86°F)63 mm (2.5 inches)71%extreme
August Weather30°C (87°F)105 mm (4.1 inches)67%extreme
September Weather27°C (81°F)111 mm (4.4 inches)69%very high
October Weather22°C (71°F)102 mm (4.0 inches)73%very high
November Weather15°C (60°F)70 mm (2.8 inches)82%high
December Weather13°C (55°F)94 mm (3.7 inches)87%moderate

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