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September Weather in Atwater, United States

Last updated: June 24, 2025

In September, the average temperature in Atwater, United States is a warm 26°C (78°F). You may experience a range where the minimum dips to 11°C (51°F) and the maximum can soar up to a sizzling 45°C (114°F). Rain is unlikely; with 0 mm (0.0 in) of precipitation over 0 days, you can expect plenty of sunshine. Average humidity sits at a comfortable 55%, making it an ideal time to enjoy outdoor activities!

September Temperature in Atwater

In September in Atwater, the average temperature is 26°C (78°F), with maximums reaching up to 45°C (114°F) and minimums dipping as low as 11°C (51°F). Be prepared for a wide range of temperatures during your travels, so pack accordingly!

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

The chart illustrates September temperature patterns in Atwater, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atwater, September typically has an average temperature of 26°C (78°F), with highs reaching up to 45°C (114°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec505357657280868478675750
Data source: Temperature data for Atwater 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 Atwater

In Atwater in September, the precipitation amount is 0 mm (0.0 in) during 0 days.

September Precipitation Trends in Atwater

The chart displays monthly precipitation patterns in Atwater, 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 Atwater, September typically receives around 0 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec96738928231000173183
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Atwater

In Atwater in September, humidity is 55%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, as you'll likely want to carry a water bottle and take occasional breaks in the shade.

September Average Humidity in Atwater

This chart illustrates the average monthly humidity levels in Atwater, 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 Atwater is approximately 55%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Atwater

In Atwater 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 Atwater.

Maximum UV Index Levels in Atwater for September

The chart shows the monthly maximum UV Index (UVI) for Atwater 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 Atwater typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109743
Data source: Atwater 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 Atwater Compares to Other Months

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

This table compares monthly weather conditions in Atwater, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)96 mm (3.8 inches)82%moderate
February Weather12°C (53°F)73 mm (2.9 inches)84%moderate
March Weather14°C (57°F)89 mm (3.5 inches)82%very high
April Weather18°C (65°F)28 mm (1.1 inches)78%very high
May Weather22°C (72°F)23 mm (0.9 inches)71%very high
June Weather27°C (81°F)1 mm (0.0 inches)64%extreme
July Weather30°C (86°F)0 mm (0.0 inches)58%extreme
August Weather29°C (84°F)0 mm (0.0 inches)54%very high
September Weather26°C (78°F)0 mm (0.0 inches)55%very high
October Weather19°C (67°F)17 mm (0.7 inches)62%high
November Weather14°C (57°F)31 mm (1.2 inches)78%moderate
December Weather10°C (50°F)83 mm (3.3 inches)80%moderate

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