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September Weather in East Porterville, United States

Last updated: June 24, 2025

In September, the average temperature in East Porterville, United States is a pleasant 26°C (79°F). Expect temperature fluctuations, with a cool minimum of 11°C (52°F) and the heat peaking at a sweltering 42°C (108°F). Rainfall is minimal, with just 2 mm (0.1 in) expected across 0 days, and the average humidity hovers around 48%, adding to the overall comfort of the climate.

September Temperature in East Porterville

In September in East Porterville, the average temperature is 26°C (79°F). Maximums can reach 42°C (108°F), while minimums can drop to as low as 11°C (52°F). Be prepared for both warm days and cooler nights when traveling to East Porterville during this month.

September Weather in East Porterville: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in East Porterville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In East Porterville, September typically has an average temperature of 26°C (79°F), with highs reaching up to 42°C (108°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec515256626979868579675850
Data source: Temperature data for East Porterville 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 East Porterville

In East Porterville in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in East Porterville

The chart displays monthly precipitation patterns in East Porterville, 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 East Porterville, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec767810843261002113775
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in East Porterville

In East Porterville in September humidity is 48%. With average temperature 26°C (79°F), this humidity feels like a warm, pleasant embrace that enhances the tropical atmosphere, making it a perfect setting for leisurely strolls and outdoor explorations.

September Average Humidity in East Porterville

This chart illustrates the average monthly humidity levels in East Porterville, 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 East Porterville is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%76%68%58%52%46%39%48%59%72%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in East Porterville

In East Porterville 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 East Porterville.

Maximum UV Index Levels in East Porterville for September

The chart shows the monthly maximum UV Index (UVI) for East Porterville 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 East Porterville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589101111109743
Data source: East Porterville 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 East Porterville Compares to Other Months

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

This table compares monthly weather conditions in East Porterville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)76 mm (3.0 inches)78%moderate
February Weather11°C (52°F)78 mm (3.1 inches)82%moderate
March Weather13°C (56°F)108 mm (4.3 inches)75%very high
April Weather17°C (63°F)43 mm (1.7 inches)68%very high
May Weather21°C (69°F)26 mm (1.0 inches)57%very high
June Weather26°C (80°F)1 mm (0.0 inches)52%extreme
July Weather30°C (87°F)0 mm (0.0 inches)46%extreme
August Weather30°C (86°F)0 mm (0.0 inches)39%very high
September Weather26°C (79°F)2 mm (0.1 inches)48%very high
October Weather20°C (68°F)11 mm (0.4 inches)59%high
November Weather14°C (58°F)37 mm (1.5 inches)72%moderate
December Weather10°C (51°F)75 mm (2.9 inches)76%moderate

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