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September Weather in Continental, United States

Last updated: June 24, 2025

The average temperature in Continental, United States during September is 20°C (69°F). Visitors can expect a minimum of 4°C (39°F) and a maximum of 34°C (93°F). With an average precipitation of 71 mm (2.8 in) over 9 days, the humidity sits at a comfortable 78%.

September Temperature in Continental

In September in Continental, the average temperature is 20°C (69°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 4°C (39°F). This variation makes it a great time for travelers to enjoy both warm days and cooler evenings, so pack accordingly!

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

The chart illustrates September temperature patterns in Continental, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Continental, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (93°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec293141506372767368574135
Data source: Temperature data for Continental 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 Continental

In Continental in September, the precipitation amount is 71 mm (2.8 in) spread over 9 days.

September Precipitation Trends in Continental

The chart displays monthly precipitation patterns in Continental, 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 Continental, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec738197971311241159371928359
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Continental

In Continental in September, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.

September Average Humidity in Continental

This chart illustrates the average monthly humidity levels in Continental, 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 Continental is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Continental

In Continental in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Continental.

Maximum UV Index Levels in Continental for September

The chart shows the monthly maximum UV Index (UVI) for Continental 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 Continental typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098642
Data source: Continental 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 Continental Compares to Other Months

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

This table compares monthly weather conditions in Continental, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)73 mm (2.9 inches)88%moderate
February Weather0°C (32°F)81 mm (3.2 inches)87%moderate
March Weather5°C (41°F)97 mm (3.8 inches)87%high
April Weather10°C (51°F)97 mm (3.8 inches)87%very high
May Weather17°C (63°F)131 mm (5.2 inches)81%very high
June Weather22°C (72°F)124 mm (4.9 inches)82%very high
July Weather24°C (76°F)115 mm (4.5 inches)81%very high
August Weather23°C (74°F)92 mm (3.6 inches)78%very high
September Weather20°C (69°F)71 mm (2.8 inches)78%very high
October Weather14°C (57°F)92 mm (3.6 inches)82%high
November Weather5°C (42°F)83 mm (3.3 inches)89%moderate
December Weather2°C (35°F)59 mm (2.3 inches)86%low

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