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September Weather in Earth, United States

Last updated: June 24, 2025

In September, the average temperature in Earth, United States hovers around 22°C (72°F), offering a pleasant climate for outdoor activities. However, temperatures can swing from a brisk 2°C (37°F) to a warm 38°C (100°F). Expect about 41 mm (1.6 in) of precipitation spread over 6 days, contributing to an average humidity of 76%. Enjoy the variety that this month brings!

September Temperature in Earth

In September in Earth, the average temperature is 22°C (72°F). Maximums can reach 38°C (100°F), and minimums can be as low as 2°C (37°F). This diverse climate makes Earth an ideal destination for travelers seeking both warm and cool experiences.

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

The chart illustrates September temperature patterns in Earth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Earth, September typically has an average temperature of 22°C (72°F), with highs reaching up to 38°C (100°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec404253596977807872594943
Data source: Temperature data for Earth 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 Earth

In Earth in September, the precipitation amount is 41 mm (1.6 in) over the course of 6 days.

September Precipitation Trends in Earth

The chart displays monthly precipitation patterns in Earth, 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 Earth, September typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec181236214934294341671413
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Earth

In Earth in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in Earth

This chart illustrates the average monthly humidity levels in Earth, 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 Earth is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%75%61%62%69%74%75%78%76%76%80%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Earth

In Earth in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Earth.

Maximum UV Index Levels in Earth for September

The chart shows the monthly maximum UV Index (UVI) for Earth 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 Earth typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111112121110864
Data source: Earth 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 Earth Compares to Other Months

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

This table compares monthly weather conditions in Earth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)18 mm (0.7 inches)74%moderate
February Weather6°C (43°F)12 mm (0.5 inches)75%high
March Weather11°C (53°F)36 mm (1.4 inches)61%very high
April Weather15°C (59°F)21 mm (0.8 inches)61%extreme
May Weather21°C (69°F)49 mm (1.9 inches)69%extreme
June Weather25°C (78°F)34 mm (1.3 inches)74%extreme
July Weather27°C (80°F)29 mm (1.1 inches)75%extreme
August Weather26°C (78°F)43 mm (1.7 inches)78%extreme
September Weather22°C (72°F)41 mm (1.6 inches)76%very high
October Weather15°C (59°F)67 mm (2.7 inches)76%very high
November Weather10°C (50°F)14 mm (0.5 inches)80%high
December Weather6°C (43°F)13 mm (0.5 inches)77%moderate

Compare Earth's Climate with Cities Worldwide