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September Weather in White Swan, United States

Last updated: June 24, 2025

In White Swan, United States, the average temperature in September hovers around 17°C (64°F), with fluctuations ranging from a cool 3°C (37°F) to a warm 37°C (98°F). Expect 15 mm (0.6 in) of precipitation over approximately 3 days, and enjoy an average humidity level of 62% that adds a touch of freshness to the air.

September Temperature in White Swan

In September in White Swan, the average temperature is 17°C (64°F). Maximums can reach 37°C (98°F) and minimums can be as low as 3°C (37°F). This diverse temperature range makes it a great time to plan your travel adventures, so be sure to pack appropriately for both warm days and cooler nights.

September Weather in White Swan: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in White Swan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In White Swan, September typically has an average temperature of 17°C (64°F), with highs reaching up to 37°C (98°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec333341495967747363504034
Data source: Temperature data for White Swan 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 White Swan

In White Swan in September, the precipitation amount is 15 mm (0.6 in) over the course of 3 days.

September Precipitation Trends in White Swan

The chart displays monthly precipitation patterns in White Swan, 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 White Swan, September typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec889341311581415496287
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in White Swan

In White Swan in September humidity is 62%. With an average temperature of 17°C (64°F), this humidity feels like a refreshing embrace, making for pleasant travel conditions that invigorate the senses while encouraging leisurely strolls and outdoor exploration.

September Average Humidity in White Swan

This chart illustrates the average monthly humidity levels in White Swan, 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 White Swan is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%87%84%81%82%79%63%62%83%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in White Swan

In White Swan 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 White Swan.

Maximum UV Index Levels in White Swan for September

The chart shows the monthly maximum UV Index (UVI) for White Swan 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 White Swan typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101098532
Data source: White Swan 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 White Swan Compares to Other Months

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

This table compares monthly weather conditions in White Swan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)88 mm (3.5 inches)86%low
February Weather1°C (33°F)93 mm (3.6 inches)86%moderate
March Weather5°C (41°F)41 mm (1.6 inches)87%high
April Weather9°C (49°F)31 mm (1.2 inches)84%high
May Weather15°C (60°F)15 mm (0.6 inches)81%very high
June Weather20°C (67°F)8 mm (0.3 inches)82%very high
July Weather24°C (75°F)1 mm (0.0 inches)79%very high
August Weather23°C (74°F)4 mm (0.1 inches)63%very high
September Weather17°C (64°F)15 mm (0.6 inches)62%very high
October Weather10°C (50°F)49 mm (1.9 inches)83%moderate
November Weather4°C (40°F)62 mm (2.4 inches)89%moderate
December Weather1°C (34°F)87 mm (3.4 inches)88%low

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