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September Weather in Fillmore, United States

Last updated: June 24, 2025

In Fillmore, United States, the average temperature in September hovers around 22°C (71°F). However, be prepared for fluctuations; temperatures can dip as low as 5°C (41°F) or soar to a scorching 41°C (106°F). On average, expect 4 mm (0.1 in) of precipitation spread across just 1 day, while the humidity remains a comfortable 48%.

September Temperature in Fillmore

In September in Fillmore the average temperature is 22°C (71°F). The maximum can reach 41°C (106°F) and the minimum can be as low as 5°C (41°F). This variation in temperature makes Fillmore a destination where travelers should be prepared for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Fillmore, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fillmore, September typically has an average temperature of 22°C (71°F), with highs reaching up to 41°C (106°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec505052586169757571645750
Data source: Temperature data for Fillmore 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 Fillmore

In Fillmore in September, the precipitation amount is 4 mm (0.1 in) over the course of 1 day.

September Precipitation Trends in Fillmore

The chart displays monthly precipitation patterns in Fillmore, 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 Fillmore, September typically receives around 4 mm (0.1 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec79717726212224102063
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fillmore

In Fillmore in September, humidity is 48%. With an average temperature of 22°C (71°F), this humidity feels like a comfortable embrace, making it pleasant for traveling, as you can enjoy outdoor activities without feeling sticky or overheated.

September Average Humidity in Fillmore

This chart illustrates the average monthly humidity levels in Fillmore, 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 Fillmore is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%76%68%58%52%46%39%48%59%72%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fillmore

In Fillmore 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 Fillmore.

Maximum UV Index Levels in Fillmore for September

The chart shows the monthly maximum UV Index (UVI) for Fillmore 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 Fillmore typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110754
Data source: Fillmore 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 Fillmore Compares to Other Months

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

This table compares monthly weather conditions in Fillmore, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)79 mm (3.1 inches)78%moderate
February Weather10°C (50°F)71 mm (2.8 inches)82%high
March Weather11°C (52°F)77 mm (3.0 inches)75%very high
April Weather15°C (59°F)26 mm (1.0 inches)68%very high
May Weather16°C (62°F)21 mm (0.8 inches)57%extreme
June Weather21°C (70°F)2 mm (0.1 inches)52%extreme
July Weather24°C (75°F)2 mm (0.1 inches)46%extreme
August Weather24°C (75°F)2 mm (0.1 inches)39%extreme
September Weather22°C (71°F)4 mm (0.1 inches)48%very high
October Weather18°C (64°F)9 mm (0.4 inches)59%high
November Weather14°C (57°F)20 mm (0.8 inches)72%moderate
December Weather10°C (50°F)63 mm (2.5 inches)76%moderate

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