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September Weather in Shell Lake, United States

Last updated: June 24, 2025

In Shell Lake, United States, the average temperature in September hovers around 16°C (62°F), providing a mild yet pleasant climate. Be prepared for temperature fluctuations, as the minimum can dip to 1°C (35°F) while the mercury can soar up to a maximum of 32°C (89°F). With an average precipitation of 98 mm (3.9 in) spread over 11 days, and humidity levels reaching around 80%, it's wise to carry an umbrella and dress accordingly!

September Temperature in Shell Lake

In September in Shell Lake, the average temperature is 16°C (62°F). The maximum can reach 32°C (89°F), and the minimum can be as low as 1°C (35°F). Be prepared for a wide range of temperatures when traveling, making it essential to pack layers for comfort.

September Weather in Shell Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Shell Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shell Lake, September typically has an average temperature of 16°C (62°F), with highs reaching up to 32°C (89°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec141531415768726862463121
Data source: Temperature data for Shell Lake 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 Shell Lake

In Shell Lake in September, the total precipitation amount is 98 mm (3.9 in) over the course of 11 days.

September Precipitation Trends in Shell Lake

The chart displays monthly precipitation patterns in Shell Lake, 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 Shell Lake, September typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec253750941139510412098974359
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Shell Lake

In Shell Lake in September humidity is 80%. With an average temperature of 16°C (62°F), this humidity feels like a warm, muggy embrace, making travel slightly uncomfortable as the air hangs heavy, necessitating frequent hydration and light clothing to stay cool and refreshed.

September Average Humidity in Shell Lake

This chart illustrates the average monthly humidity levels in Shell Lake, 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 Shell Lake is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Shell Lake

In Shell Lake in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Shell Lake.

Maximum UV Index Levels in Shell Lake for September

The chart shows the monthly maximum UV Index (UVI) for Shell Lake 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 Shell Lake typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Shell Lake 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 Shell Lake Compares to Other Months

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

This table compares monthly weather conditions in Shell Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)25 mm (1.0 inches)88%low
February Weather-9°C (15°F)37 mm (1.5 inches)89%moderate
March Weather-1°C (31°F)50 mm (2.0 inches)86%moderate
April Weather5°C (42°F)94 mm (3.7 inches)85%high
May Weather14°C (57°F)113 mm (4.5 inches)79%very high
June Weather20°C (68°F)95 mm (3.7 inches)80%very high
July Weather22°C (72°F)104 mm (4.1 inches)80%very high
August Weather20°C (69°F)120 mm (4.7 inches)78%very high
September Weather16°C (62°F)98 mm (3.9 inches)80%high
October Weather8°C (47°F)97 mm (3.8 inches)84%moderate
November Weather0°C (31°F)43 mm (1.7 inches)89%moderate
December Weather-6°C (22°F)59 mm (2.3 inches)85%low

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