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September Weather in Shelton, United States

Last updated: June 24, 2025

In September, the average temperature in Shelton, United States hovers around 21°C (69°F), making it a pleasant time of year. Be prepared for a temperature range that can drop to a minimum of 4°C (39°F) and soar to a maximum of 36°C (97°F). During this month, expect about 52 mm (2.0 in) of precipitation over 5 days, with an average humidity level of 77%.

September Temperature in Shelton

In September in Shelton, the average temperature is 21°C (69°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 4°C (39°F). This diverse temperature range makes it essential for travelers to pack accordingly for both warm and cool conditions.

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

The chart illustrates September temperature patterns in Shelton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shelton, September typically has an average temperature of 21°C (69°F), with highs reaching up to 36°C (97°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec272641496175777469514131
Data source: Temperature data for Shelton 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 Shelton

In Shelton in September, the precipitation amount is 52 mm (2.0 in) over a span of 5 days.

September Precipitation Trends in Shelton

The chart displays monthly precipitation patterns in Shelton, 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 Shelton, September typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec2519864915370697752812141
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Shelton

In Shelton in September humidity is 77%. With an average temperature of 21°C (69°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities both invigorating and somewhat sluggish for traveling.

September Average Humidity in Shelton

This chart illustrates the average monthly humidity levels in Shelton, 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 Shelton is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%81%69%71%80%83%84%84%77%72%80%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Shelton

In Shelton 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 Shelton.

Maximum UV Index Levels in Shelton for September

The chart shows the monthly maximum UV Index (UVI) for Shelton 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 Shelton typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111108643
Data source: Shelton 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 Shelton Compares to Other Months

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

This table compares monthly weather conditions in Shelton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)25 mm (1.0 inches)73%moderate
February Weather-3°C (26°F)19 mm (0.7 inches)81%moderate
March Weather5°C (41°F)86 mm (3.4 inches)69%high
April Weather10°C (50°F)49 mm (1.9 inches)71%very high
May Weather16°C (61°F)153 mm (6.0 inches)80%very high
June Weather24°C (75°F)70 mm (2.8 inches)83%extreme
July Weather25°C (78°F)69 mm (2.7 inches)84%extreme
August Weather23°C (74°F)77 mm (3.0 inches)84%very high
September Weather21°C (69°F)52 mm (2.0 inches)77%very high
October Weather11°C (52°F)81 mm (3.2 inches)72%high
November Weather5°C (41°F)20 mm (0.8 inches)80%moderate
December Weather0°C (31°F)41 mm (1.6 inches)79%moderate

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