September Weather in Fremont, United States

Last updated: June 24, 2025

In September, the average temperature in Fremont, United States hovers around 24°C (76°F). Temperatures can dip to a cool 10°C (51°F) at night while peaking at a warm 35°C (96°F) during the day. Expect an average of 129 mm (5.1 in) of precipitation spread over 10 days, contributing to a rather high average humidity of 79%.

September Temperature in Fremont

In September in Fremont, the average temperature is 24°C (76°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 10°C (51°F). Therefore, it's advisable to pack layers for your travels, ensuring comfort in both warmer afternoons and cooler evenings.

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 24°C (76°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Fremont generated using information from the Copernicus Climate Change Service.

September Precipitation in Fremont

In Fremont in September, the precipitation amount is 129 mm (5.1 in) over a span of 10 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 129 mm (5.1 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Fremont

In Fremont in September, humidity is 79%. With an average temperature of 24°C (76°F), this humidity feels like a thick blanket wrapped around you, making traveling somewhat uncomfortable and sticky, as you navigate through the warmth while constantly seeking shade and hydration.

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 79%, offering insight into how humid the weather typically is during this month.

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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	90 mm (3.5 inches)	85%	moderate
February Weather	10°C (50°F)	88 mm (3.5 inches)	82%	high
March Weather	12°C (54°F)	71 mm (2.8 inches)	81%	very high
April Weather	17°C (63°F)	103 mm (4.1 inches)	80%	very high
May Weather	22°C (72°F)	113 mm (4.4 inches)	81%	extreme
June Weather	25°C (77°F)	124 mm (4.9 inches)	81%	extreme
July Weather	27°C (81°F)	117 mm (4.6 inches)	81%	extreme
August Weather	26°C (80°F)	153 mm (6.0 inches)	80%	very high
September Weather	24°C (76°F)	129 mm (5.1 inches)	79%	very high
October Weather	19°C (67°F)	65 mm (2.6 inches)	80%	very high
November Weather	12°C (53°F)	87 mm (3.4 inches)	85%	moderate
December Weather	9°C (49°F)	107 mm (4.2 inches)	86%	moderate