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September Weather in Sultan, United States

Last updated: June 24, 2025

In Sultan, United States, the average temperature in September hovers around 14°C (57°F), offering a pleasant climate for exploration. Daytime highs can reach up to 30°C (87°F), while chilly nights may drop to a minimum of 3°C (37°F). Expect about 136 mm (5.4 in) of precipitation spread over 13 days, contributing to an average humidity of 62%. Make sure to pack accordingly for a variety of weather!

September Temperature in Sultan

In September in Sultan, the average temperature is 14°C (57°F). Maximum temperatures can reach 30°C (87°F), while minimum temperatures can drop to as low as 3°C (37°F). This makes Sultan an ideal destination for travelers seeking a pleasant climate with opportunities for both warm and cool adventures.

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

The chart illustrates September temperature patterns in Sultan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sultan, September typically has an average temperature of 14°C (57°F), with highs reaching up to 30°C (87°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec363439455257616256464136
Data source: Temperature data for Sultan 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 Sultan

In Sultan in September, the precipitation amount reaches 136 mm (5.4 in) over a span of 13 days.

September Precipitation Trends in Sultan

The chart displays monthly precipitation patterns in Sultan, 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 Sultan, September typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec2613032021821121024030136261301300
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sultan

In Sultan in September humidity is 62%. With an average temperature of 14°C (57°F), this humidity feels like a refreshing embrace, making it a pleasant experience for traveling as the mild climate invites you to explore without feeling too hot or sweaty.

September Average Humidity in Sultan

This chart illustrates the average monthly humidity levels in Sultan, 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 Sultan 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 Sultan

In Sultan 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 Sultan.

Maximum UV Index Levels in Sultan for September

The chart shows the monthly maximum UV Index (UVI) for Sultan 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 Sultan typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec236799997532
Data source: Sultan 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 Sultan Compares to Other Months

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

This table compares monthly weather conditions in Sultan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)261 mm (10.3 inches)86%low
February Weather1°C (34°F)303 mm (11.9 inches)86%moderate
March Weather4°C (39°F)202 mm (7.9 inches)87%high
April Weather7°C (45°F)182 mm (7.2 inches)84%high
May Weather11°C (52°F)112 mm (4.4 inches)81%very high
June Weather14°C (57°F)102 mm (4.0 inches)82%very high
July Weather16°C (62°F)40 mm (1.6 inches)79%very high
August Weather17°C (62°F)30 mm (1.2 inches)63%very high
September Weather14°C (57°F)136 mm (5.4 inches)62%high
October Weather8°C (46°F)261 mm (10.3 inches)83%moderate
November Weather5°C (41°F)301 mm (11.8 inches)89%moderate
December Weather2°C (36°F)300 mm (11.8 inches)88%low

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