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September Weather in Celina, United States

Last updated: June 24, 2025

In Celina, United States, the average temperature in September is a warm 26°C (79°F). While temperatures can dip to a cool 10°C (50°F) at night, they can also soar to a sizzling 37°C (99°F) during the day. Expect some rain with an average precipitation amount of 109 mm (4.3 in) spread over about 8 days, and don't forget the average humidity level, which hovers around 65%. Adjust your plans accordingly and enjoy your stay!

September Temperature in Celina

In September in Celina, the average temperature is 26°C (79°F), with maximums reaching up to 37°C (99°F) and minimums dropping as low as 10°C (50°F). It's advisable to pack a mix of light clothing for the daytime and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Celina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Celina, 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 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec464859647381848479675550
Data source: Temperature data for Celina 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 Celina

In Celina in September, the total precipitation amount is 109 mm (4.3 in) spread over 8 days.

September Precipitation Trends in Celina

The chart displays monthly precipitation patterns in Celina, 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 Celina, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec60971301231729754971091515666
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Celina

In Celina in September, humidity is 65%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making travel quite sticky and uncomfortable.

September Average Humidity in Celina

This chart illustrates the average monthly humidity levels in Celina, 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 Celina is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Celina

In Celina 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 Celina.

Maximum UV Index Levels in Celina for September

The chart shows the monthly maximum UV Index (UVI) for Celina 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 Celina typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Celina 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 Celina Compares to Other Months

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

This table compares monthly weather conditions in Celina, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)60 mm (2.4 inches)80%moderate
February Weather9°C (48°F)97 mm (3.8 inches)79%high
March Weather15°C (59°F)130 mm (5.1 inches)78%very high
April Weather18°C (64°F)123 mm (4.8 inches)78%very high
May Weather23°C (74°F)172 mm (6.8 inches)81%extreme
June Weather27°C (81°F)97 mm (3.8 inches)78%extreme
July Weather29°C (85°F)54 mm (2.1 inches)73%extreme
August Weather29°C (84°F)97 mm (3.8 inches)66%extreme
September Weather26°C (79°F)109 mm (4.3 inches)65%very high
October Weather19°C (67°F)151 mm (6.0 inches)72%very high
November Weather13°C (56°F)56 mm (2.2 inches)82%high
December Weather10°C (51°F)66 mm (2.6 inches)87%moderate

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