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September Weather in Diamond Springs, United States

Last updated: June 24, 2025

In Diamond Springs, United States, the average temperature in September is a pleasant 22°C (71°F). However, it can swing from a chilly 6°C (43°F) to a sizzling 40°C (105°F). Expect a modest precipitation of 15 mm (0.6 in) over the course of just 2 days, with an average humidity level of 44%. Enjoy the variety that this month brings!

September Temperature in Diamond Springs

In September in Diamond Springs, the average temperature is 22°C (71°F), with maximums potentially reaching 40°C (105°F) and minimums dipping as low as 6°C (43°F). Be prepared for warm days and cool evenings, making it an excellent time for outdoor activities and exploration.

September Weather in Diamond Springs: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Diamond Springs, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Diamond Springs, September typically has an average temperature of 22°C (71°F), with highs reaching up to 40°C (105°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec464649556172787771615145
Data source: Temperature data for Diamond Springs 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 Diamond Springs

In Diamond Springs in September, the precipitation amount is 15 mm (0.6 in) over the course of 2 days.

September Precipitation Trends in Diamond Springs

The chart displays monthly precipitation patterns in Diamond Springs, 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 Diamond Springs, September typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec226231249115698011562128179
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Diamond Springs

In Diamond Springs in September, humidity is 44%. With an average temperature of 22°C (71°F), this humidity feels like a refreshing embrace, making it pleasant for traveling and exploring the sights without discomfort.

September Average Humidity in Diamond Springs

This chart illustrates the average monthly humidity levels in Diamond Springs, 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 Diamond Springs is approximately 44%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%83%81%74%64%44%37%44%65%84%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Diamond Springs

In Diamond Springs 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 Diamond Springs.

Maximum UV Index Levels in Diamond Springs for September

The chart shows the monthly maximum UV Index (UVI) for Diamond Springs 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 Diamond Springs typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589111111109643
Data source: Diamond Springs 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 Diamond Springs Compares to Other Months

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

This table compares monthly weather conditions in Diamond Springs, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)226 mm (8.9 inches)84%moderate
February Weather8°C (47°F)231 mm (9.1 inches)84%moderate
March Weather9°C (49°F)249 mm (9.8 inches)83%very high
April Weather13°C (56°F)115 mm (4.5 inches)81%very high
May Weather16°C (62°F)69 mm (2.7 inches)74%extreme
June Weather22°C (72°F)8 mm (0.3 inches)64%extreme
July Weather26°C (78°F)0 mm (0.0 inches)44%extreme
August Weather25°C (77°F)0 mm (0.0 inches)36%very high
September Weather22°C (71°F)15 mm (0.6 inches)44%very high
October Weather16°C (61°F)62 mm (2.4 inches)65%high
November Weather11°C (52°F)128 mm (5.0 inches)84%moderate
December Weather7°C (45°F)179 mm (7.1 inches)83%moderate

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