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September Weather in Hattiesburg, United States

Last updated: June 24, 2025

In September, the average temperature in Hattiesburg, United States hovers around 26°C (79°F). However, temperatures can dip to a cool 11°C (52°F) or soar up to a sizzling 38°C (101°F). During this month, expect about 104 mm (4.1 in) of precipitation spread over 11 days, with an average humidity level of 80%. It's a time of warm fluctuations and occasional rain, perfect for enjoying the lush landscapes!

September Temperature in Hattiesburg

In September in Hattiesburg, the average temperature is 26°C (79°F). Maximum temperatures can reach 38°C (101°F), while the minimum can drop to as low as 11°C (52°F). This makes Hattiesburg an ideal destination for travelers seeking a warm climate, but be prepared for some cooler evenings.

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

The chart illustrates September temperature patterns in Hattiesburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hattiesburg, September typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec515762667579818179715754
Data source: Temperature data for Hattiesburg 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 Hattiesburg

In Hattiesburg in September, the precipitation amount is 104 mm (4.1 in) over the course of 11 days.

September Precipitation Trends in Hattiesburg

The chart displays monthly precipitation patterns in Hattiesburg, 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 Hattiesburg, September typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec11711210213114619715017910410079133
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hattiesburg

In Hattiesburg 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 Hattiesburg

This chart illustrates the average monthly humidity levels in Hattiesburg, 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 Hattiesburg 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 Hattiesburg

In Hattiesburg 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 Hattiesburg.

Maximum UV Index Levels in Hattiesburg for September

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

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

This table compares monthly weather conditions in Hattiesburg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)117 mm (4.6 inches)82%moderate
February Weather14°C (57°F)112 mm (4.4 inches)80%very high
March Weather17°C (63°F)102 mm (4.0 inches)80%very high
April Weather19°C (67°F)131 mm (5.2 inches)78%extreme
May Weather24°C (75°F)146 mm (5.8 inches)73%extreme
June Weather26°C (80°F)197 mm (7.8 inches)71%extreme
July Weather27°C (81°F)150 mm (5.9 inches)79%extreme
August Weather27°C (81°F)179 mm (7.0 inches)78%extreme
September Weather26°C (79°F)104 mm (4.1 inches)80%very high
October Weather22°C (71°F)100 mm (3.9 inches)76%very high
November Weather14°C (58°F)79 mm (3.1 inches)83%high
December Weather12°C (54°F)133 mm (5.2 inches)87%moderate

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