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September Weather in Imperial, United States

Last updated: June 24, 2025

In September, the average temperature in Imperial, United States hovers around 20°C (69°F). However, temperatures can vary significantly, with a minimum of 1°C (35°F) and a maximum soaring to 39°C (102°F). Expect 43 mm (1.7 in) of precipitation over 6 days, accompanied by an average humidity of around 70%. Be prepared for a mix of weather!

September Temperature in Imperial

In September in Imperial, the average temperature is 20°C (69°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 1°C (35°F). Be prepared for a wide range of temperatures to make the most of your travel experience.

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

The chart illustrates September temperature patterns in Imperial, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Imperial, September typically has an average temperature of 20°C (69°F), with highs reaching up to 39°C (102°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec312942495973777468504234
Data source: Temperature data for Imperial 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 Imperial

In Imperial in September, the precipitation amount is 43 mm (1.7 in) over a period of 6 days.

September Precipitation Trends in Imperial

The chart displays monthly precipitation patterns in Imperial, 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 Imperial, September typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec1516614911648656743371617
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Imperial

In Imperial in September humidity is 70%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket wrapped around you, making outdoor activities a bit challenging but also an opportunity to enjoy refreshing drinks and shaded spots while exploring the vibrant surroundings.

September Average Humidity in Imperial

This chart illustrates the average monthly humidity levels in Imperial, 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 Imperial is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%80%64%64%76%79%77%79%70%64%75%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Imperial

In Imperial 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 Imperial.

Maximum UV Index Levels in Imperial for September

The chart shows the monthly maximum UV Index (UVI) for Imperial 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 Imperial typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Imperial 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 Imperial Compares to Other Months

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

This table compares monthly weather conditions in Imperial, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)15 mm (0.6 inches)73%moderate
February Weather-1°C (30°F)16 mm (0.6 inches)80%moderate
March Weather6°C (42°F)61 mm (2.4 inches)64%high
April Weather9°C (49°F)49 mm (1.9 inches)64%very high
May Weather15°C (59°F)116 mm (4.6 inches)76%very high
June Weather23°C (73°F)48 mm (1.9 inches)79%extreme
July Weather25°C (77°F)65 mm (2.5 inches)77%extreme
August Weather23°C (74°F)67 mm (2.6 inches)79%very high
September Weather20°C (69°F)43 mm (1.7 inches)70%very high
October Weather10°C (51°F)37 mm (1.4 inches)64%high
November Weather5°C (42°F)16 mm (0.6 inches)75%moderate
December Weather1°C (34°F)17 mm (0.7 inches)78%moderate

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