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September Weather in Ninilchik, United States

Last updated: June 24, 2025

In Ninilchik, United States, the average temperature in September hovers around 11°C (51°F). Expect a minimum of 3°C (37°F) and a comfortable maximum of 16°C (62°F). This month also brings about 139 mm (5.5 in) of precipitation spread over 16 days, contributing to an average humidity of a high 90%. Be prepared for a cool and damp experience!

September Temperature in Ninilchik

In September in Ninilchik, the average temperature is 11°C (51°F), with maximums reaching 16°C (62°F) and minimums dropping as low as 3°C (37°F). Travelers should pack layers to stay comfortable while exploring the varied temperatures.

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

The chart illustrates September temperature patterns in Ninilchik, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ninilchik, September typically has an average temperature of 11°C (51°F), with highs reaching up to 16°C (62°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec262829374550555551433330
Data source: Temperature data for Ninilchik 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 Ninilchik

In Ninilchik in September, the total precipitation amount is 139 mm (5.5 in) spread over 16 days.

September Precipitation Trends in Ninilchik

The chart displays monthly precipitation patterns in Ninilchik, 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 Ninilchik, September typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec7870545196648599139165124155
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ninilchik

In Ninilchik in September, humidity is 90%. With an average temperature of 11°C (51°F), this humidity feels like a damp blanket wrapping around you, making traveling uncomfortable and sticky, as every step leaves you feeling sluggish and clinging to the air.

September Average Humidity in Ninilchik

This chart illustrates the average monthly humidity levels in Ninilchik, 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 Ninilchik is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%92%86%79%87%91%92%92%90%87%91%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ninilchik

In Ninilchik in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Ninilchik for better planning.

Maximum UV Index Levels in Ninilchik for September

The chart shows the monthly maximum UV Index (UVI) for Ninilchik 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 Ninilchik typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123466764211
Data source: Ninilchik 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 Ninilchik Compares to Other Months

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

This table compares monthly weather conditions in Ninilchik, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)78 mm (3.1 inches)92%low
February Weather-2°C (28°F)70 mm (2.8 inches)92%low
March Weather-1°C (30°F)54 mm (2.1 inches)86%moderate
April Weather3°C (37°F)51 mm (2.0 inches)79%moderate
May Weather7°C (45°F)96 mm (3.8 inches)87%high
June Weather10°C (51°F)64 mm (2.5 inches)91%high
July Weather13°C (55°F)85 mm (3.3 inches)92%high
August Weather13°C (56°F)99 mm (3.9 inches)92%high
September Weather11°C (51°F)139 mm (5.5 inches)90%moderate
October Weather6°C (44°F)164 mm (6.5 inches)87%low
November Weather0°C (33°F)124 mm (4.9 inches)91%low
December Weather-1°C (31°F)155 mm (6.1 inches)92%low

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