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September Weather in Stanley, United States

Last updated: June 24, 2025

In Stanley, United States, the average temperature in September hovers around 20°C (69°F), making it quite pleasant. However, temperatures can fluctuate between a cool 3°C (38°F) at night and a warm 34°C (94°F) during the day. Be prepared for a bit of rain, as 107 mm (4.2 in) of precipitation typically falls over about 10 days. With an average humidity of 68%, you'll feel the warmth in the air.

September Temperature in Stanley

In September in Stanley, the average temperature is 20°C (69°F). Maximum temperatures can reach 34°C (94°F), while minimum temperatures can drop as low as 3°C (38°F). Overall, this month offers a pleasant climate for travelers, making it an ideal time to explore Stanley.

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

The chart illustrates September temperature patterns in Stanley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stanley, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec343945556472777468594439
Data source: Temperature data for Stanley 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 Stanley

In Stanley in September, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.

September Precipitation Trends in Stanley

The chart displays monthly precipitation patterns in Stanley, 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 Stanley, September typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec619172111120114871311071078285
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stanley

In Stanley in September, humidity is 68%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making outdoor exploration both refreshing and slightly sticky, requiring occasional breaks in the shade to stay comfortable while traveling.

September Average Humidity in Stanley

This chart illustrates the average monthly humidity levels in Stanley, 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 Stanley is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Stanley

In Stanley 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 Stanley.

Maximum UV Index Levels in Stanley for September

The chart shows the monthly maximum UV Index (UVI) for Stanley 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 Stanley typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111010108753
Data source: Stanley 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 Stanley Compares to Other Months

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

This table compares monthly weather conditions in Stanley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)61 mm (2.4 inches)86%moderate
February Weather4°C (40°F)91 mm (3.6 inches)86%moderate
March Weather7°C (45°F)72 mm (2.8 inches)86%high
April Weather13°C (55°F)111 mm (4.4 inches)84%very high
May Weather18°C (64°F)120 mm (4.7 inches)78%extreme
June Weather22°C (72°F)114 mm (4.5 inches)79%very high
July Weather25°C (77°F)87 mm (3.4 inches)70%very high
August Weather23°C (74°F)131 mm (5.2 inches)59%very high
September Weather20°C (69°F)107 mm (4.2 inches)68%very high
October Weather15°C (59°F)107 mm (4.2 inches)80%high
November Weather7°C (44°F)82 mm (3.2 inches)86%moderate
December Weather4°C (39°F)85 mm (3.3 inches)85%moderate

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