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September Weather in Tracy, United States

Last updated: June 24, 2025

In Tracy, United States, the average temperature for September hovers around 18°C (65°F). Expect minimums dropping to 2°C (36°F) and maximums reaching a warm 33°C (91°F). With an average precipitation of 107 mm (4.2 in) spread over 9 days, it’s advisable to keep an umbrella handy. Plus, the average humidity level is a notable 82%, adding a touch of mugginess to the air. Enjoy the unique climate of this vibrant location!

September Temperature in Tracy

In September in Tracy, the average temperature is 18°C (65°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 2°C (36°F). This makes Tracy an ideal destination for travelers seeking a mix of comfortable days and cooler evenings.

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

The chart illustrates September temperature patterns in Tracy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tracy, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec171733435972747064483425
Data source: Temperature data for Tracy 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 Tracy

In Tracy in September, the precipitation amount is 107 mm (4.2 in), occurring over a span of 9 days.

September Precipitation Trends in Tracy

The chart displays monthly precipitation patterns in Tracy, 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 Tracy, September typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec27276583122104118128107923041
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Tracy

In Tracy in September, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

September Average Humidity in Tracy

This chart illustrates the average monthly humidity levels in Tracy, 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 Tracy is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%89%81%82%76%81%82%83%82%82%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Tracy

In Tracy 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 Tracy.

Maximum UV Index Levels in Tracy for September

The chart shows the monthly maximum UV Index (UVI) for Tracy 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 Tracy typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3558910998532
Data source: Tracy 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 Tracy Compares to Other Months

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

This table compares monthly weather conditions in Tracy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)27 mm (1.0 inches)85%moderate
February Weather-9°C (17°F)27 mm (1.1 inches)89%moderate
March Weather1°C (33°F)65 mm (2.6 inches)81%moderate
April Weather6°C (43°F)83 mm (3.3 inches)82%very high
May Weather15°C (59°F)122 mm (4.8 inches)76%very high
June Weather22°C (72°F)104 mm (4.1 inches)81%very high
July Weather23°C (74°F)118 mm (4.6 inches)82%very high
August Weather21°C (71°F)128 mm (5.1 inches)83%very high
September Weather18°C (65°F)107 mm (4.2 inches)82%very high
October Weather9°C (48°F)92 mm (3.6 inches)82%moderate
November Weather1°C (34°F)30 mm (1.2 inches)87%moderate
December Weather-4°C (25°F)41 mm (1.6 inches)84%low

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