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September Weather in Meridian, United States

Last updated: June 24, 2025

In Meridian, United States, the average temperature in September is a pleasant 20°C (68°F). However, temperatures can vary significantly, ranging from a cool 4°C (40°F) to a sizzling 39°C (102°F). Be prepared for some light rain, as the area typically sees around 10 mm (0.4 in) of precipitation over 2 days. With an average humidity of 48%, the climate is generally comfortable.

September Temperature in Meridian

In September in Meridian, the average temperature is 20°C (68°F). Maximums can reach 39°C (102°F) and minimums can be as low as 4°C (40°F). This wide temperature range makes it essential to pack both light clothing for the daytime heat and warmer layers for cooler evenings.

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

The chart illustrates September temperature patterns in Meridian, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Meridian, September typically has an average temperature of 20°C (68°F), with highs reaching up to 39°C (102°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec343747536272817968534335
Data source: Temperature data for Meridian 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 Meridian

In Meridian in September, the precipitation amount is 10 mm (0.4 in) over a period of 2 days.

September Precipitation Trends in Meridian

The chart displays monthly precipitation patterns in Meridian, 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 Meridian, September typically receives around 10 mm (0.4 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec4341343435192710212936
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Meridian

In Meridian in September humidity is 48%. With an average temperature of 20°C (68°F), this humidity feels like a pleasant and refreshing environment for traveling, creating an ideal atmosphere for exploring and enjoying outdoor activities.

September Average Humidity in Meridian

This chart illustrates the average monthly humidity levels in Meridian, 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 Meridian is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%85%79%71%71%66%50%48%65%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Meridian

In Meridian in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Meridian.

Maximum UV Index Levels in Meridian for September

The chart shows the monthly maximum UV Index (UVI) for Meridian 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 Meridian typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810111198642
Data source: Meridian 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 Meridian Compares to Other Months

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

This table compares monthly weather conditions in Meridian, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)43 mm (1.7 inches)88%moderate
February Weather3°C (37°F)41 mm (1.6 inches)89%moderate
March Weather8°C (47°F)34 mm (1.3 inches)85%high
April Weather12°C (54°F)34 mm (1.3 inches)79%very high
May Weather16°C (62°F)35 mm (1.4 inches)71%very high
June Weather22°C (72°F)19 mm (0.7 inches)71%extreme
July Weather27°C (82°F)1 mm (0.1 inches)66%extreme
August Weather26°C (79°F)7 mm (0.3 inches)50%very high
September Weather20°C (68°F)10 mm (0.4 inches)48%very high
October Weather12°C (53°F)21 mm (0.8 inches)65%high
November Weather6°C (43°F)29 mm (1.1 inches)84%moderate
December Weather2°C (35°F)35 mm (1.4 inches)87%low

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