Last updated: June 24, 2025
In September, the average temperature in Fremont, United States hovers around 21°C (69°F). During this month, temperatures can fluctuate widely, with a minimum as low as 5°C (41°F) and a scorching maximum reaching 37°C (98°F). Expect 79 mm (3.1 in) of precipitation spread across 8 days, contributing to an average humidity of 75%.
In September in Fremont, the average temperature is 21°C (69°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 5°C (41°F). This diverse temperature range makes it essential for travelers to pack accordingly to enjoy their visit comfortably.
In Fremont in September, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.
In Fremont in September, humidity is 75%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace that can make even a short walk feel exhausting for travelers, often leading to a longing for refreshing breezes or air-conditioned retreats.
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.
UV Risk Categories
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.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 31 mm (1.2 inches) | 76% | moderate |
| February Weather | -4°C (25°F) | 28 mm (1.1 inches) | 80% | moderate |
| March Weather | 5°C (41°F) | 93 mm (3.7 inches) | 73% | high |
| April Weather | 10°C (50°F) | 56 mm (2.2 inches) | 74% | very high |
| May Weather | 17°C (62°F) | 148 mm (5.8 inches) | 78% | very high |
| June Weather | 24°C (76°F) | 112 mm (4.4 inches) | 82% | very high |
| July Weather | 25°C (78°F) | 69 mm (2.7 inches) | 83% | very high |
| August Weather | 23°C (75°F) | 100 mm (3.9 inches) | 80% | very high |
| September Weather | 21°C (69°F) | 79 mm (3.1 inches) | 75% | very high |
| October Weather | 11°C (52°F) | 99 mm (3.9 inches) | 75% | high |
| November Weather | 4°C (40°F) | 30 mm (1.2 inches) | 82% | moderate |
| December Weather | -1°C (31°F) | 42 mm (1.7 inches) | 83% | low |