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September Weather in Fremont, United States

Last updated: June 24, 2025

In September, the average temperature in Fremont, United States hovers around 19°C (66°F). Expect a mix of weather, with minimums dropping to 3°C (37°F) and maximums peaking at 32°C (90°F). During this month, anticipate around 70 mm (2.8 in) of precipitation spread over 8 days, contributing to an average humidity level of 78%. Enjoy your stay in this dynamic climate!

September Temperature in Fremont

In September in Fremont, the average temperature is 19°C (66°F). Maximum temperatures can reach 32°C (90°F), while minimum temperatures can drop to as low as 3°C (37°F). Be sure to pack a variety of clothing to accommodate both warm and cool weather during your travels.

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

The chart illustrates September temperature patterns in Fremont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fremont, September typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (90°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec272838476071747266543933
Data source: Temperature data for Fremont 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 Fremont

In Fremont in September, the total precipitation amount is 70 mm (2.8 in), spread over the course of 8 days.

September Precipitation Trends in Fremont

The chart displays monthly precipitation patterns in Fremont, 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 Fremont, September typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec72739610413911712892711208358
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fremont

In Fremont in September, humidity is 78%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making traveling quite uncomfortable unless you're well-prepared with lightweight, breathable clothing and frequent breaks to stay hydrated.

September Average Humidity in Fremont

This chart illustrates the average monthly humidity levels in Fremont, 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 Fremont is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fremont

In Fremont 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 Fremont.

Maximum UV Index Levels in Fremont for September

The chart shows the monthly maximum UV Index (UVI) for Fremont 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 Fremont typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098642
Data source: Fremont 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 Fremont Compares to Other Months

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

This table compares monthly weather conditions in Fremont, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)72 mm (2.8 inches)85%moderate
February Weather-2°C (28°F)73 mm (2.9 inches)85%moderate
March Weather3°C (38°F)96 mm (3.8 inches)86%high
April Weather9°C (48°F)103 mm (4.1 inches)87%very high
May Weather16°C (61°F)139 mm (5.5 inches)81%very high
June Weather21°C (71°F)117 mm (4.6 inches)82%very high
July Weather24°C (75°F)128 mm (5.0 inches)81%very high
August Weather22°C (72°F)92 mm (3.6 inches)79%very high
September Weather19°C (66°F)70 mm (2.8 inches)78%very high
October Weather12°C (54°F)120 mm (4.7 inches)81%high
November Weather4°C (39°F)83 mm (3.3 inches)89%moderate
December Weather0°C (33°F)58 mm (2.3 inches)86%low

Compare Fremont's Climate with Cities Worldwide