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September Weather in Orwell, United States

Last updated: June 24, 2025

In Orwell, United States, the average temperature in September is a pleasant 19°C (66°F). Expect temperatures to range from a cool 3°C (38°F) to a warm 33°C (92°F). During this month, precipitation averages 100 mm (3.9 in), typically spread over 10 days, and humidity hovers around a comfortable 77%.

September Temperature in Orwell

In September in Orwell, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (92°F), while minimums can dip as low as 3°C (38°F). This variety in weather makes Orwell an ideal destination for travelers seeking both warm and cool experiences.

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

The chart illustrates September temperature patterns in Orwell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Orwell, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (92°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec283138486068737166554034
Data source: Temperature data for Orwell 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 Orwell

In Orwell in September, the precipitation amount is 100 mm (3.9 in) over a span of 10 days.

September Precipitation Trends in Orwell

The chart displays monthly precipitation patterns in Orwell, 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 Orwell, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec919810812713514414210710012210199
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Orwell

In Orwell in September, humidity is 77%. With an average temperature of 19°C (66°F), this humidity feels like a heavy blanket wrapping around you, making the air feel thick and sticky, which can be quite uncomfortable for traveling.

September Average Humidity in Orwell

This chart illustrates the average monthly humidity levels in Orwell, 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 Orwell is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Orwell

In Orwell 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 Orwell.

Maximum UV Index Levels in Orwell for September

The chart shows the monthly maximum UV Index (UVI) for Orwell 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 Orwell typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Orwell 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 Orwell Compares to Other Months

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

This table compares monthly weather conditions in Orwell, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)91 mm (3.6 inches)88%moderate
February Weather-1°C (31°F)98 mm (3.9 inches)88%moderate
March Weather3°C (38°F)108 mm (4.3 inches)87%high
April Weather9°C (48°F)127 mm (5.0 inches)87%very high
May Weather16°C (60°F)135 mm (5.3 inches)81%very high
June Weather20°C (69°F)144 mm (5.7 inches)83%very high
July Weather23°C (73°F)142 mm (5.6 inches)82%very high
August Weather22°C (71°F)107 mm (4.2 inches)76%very high
September Weather19°C (66°F)100 mm (3.9 inches)77%very high
October Weather13°C (55°F)122 mm (4.8 inches)82%high
November Weather5°C (41°F)101 mm (4.0 inches)89%moderate
December Weather1°C (34°F)99 mm (3.9 inches)86%low

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