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September Weather in Semmes, United States

Last updated: June 24, 2025

In Semmes, United States, the average temperature in September hovers around 26°C (79°F). Expect a comfortable range, with minimum temperatures dipping to 12°C (54°F) and maximums soaring to 37°C (99°F). During this month, anticipate about 149 mm (5.9 in) of precipitation across 14 days, contributing to an average humidity level of 80%. Stay prepared for a mix of warm days and occasional showers!

September Temperature in Semmes

In September in Semmes, the average temperature is 26°C (79°F). Maximums can reach 37°C (99°F), and minimums can be as low as 12°C (54°F). This makes Semmes an ideal destination for travelers seeking warm weather while still having the option for cooler evenings.

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

The chart illustrates September temperature patterns in Semmes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Semmes, September typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (99°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec525863677580818179725955
Data source: Temperature data for Semmes 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 Semmes

In Semmes in September, the precipitation amount is 149 mm (5.9 in) over a span of 14 days.

September Precipitation Trends in Semmes

The chart displays monthly precipitation patterns in Semmes, 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 Semmes, September typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec10110510312214923816619614912863129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Semmes

In Semmes in September humidity is 80%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket, making outdoor activities feel sticky and exhausting, potentially dampening the travel experience and necessitating frequent breaks to cool down and hydrate.

September Average Humidity in Semmes

This chart illustrates the average monthly humidity levels in Semmes, 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 Semmes is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%78%73%71%79%78%80%76%83%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Semmes

In Semmes 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 Semmes.

Maximum UV Index Levels in Semmes for September

The chart shows the monthly maximum UV Index (UVI) for Semmes 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 Semmes typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111111110864
Data source: Semmes 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 Semmes Compares to Other Months

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

This table compares monthly weather conditions in Semmes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)101 mm (4.0 inches)82%moderate
February Weather14°C (58°F)105 mm (4.1 inches)80%very high
March Weather17°C (63°F)103 mm (4.1 inches)80%very high
April Weather19°C (67°F)122 mm (4.8 inches)78%extreme
May Weather24°C (75°F)149 mm (5.9 inches)73%extreme
June Weather27°C (80°F)238 mm (9.4 inches)71%extreme
July Weather27°C (82°F)166 mm (6.6 inches)79%extreme
August Weather27°C (81°F)196 mm (7.7 inches)78%extreme
September Weather26°C (79°F)149 mm (5.9 inches)80%very high
October Weather22°C (72°F)128 mm (5.0 inches)76%very high
November Weather15°C (59°F)63 mm (2.5 inches)83%high
December Weather13°C (56°F)129 mm (5.1 inches)87%moderate

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