September Weather in Soldotna, United States

Last updated: June 24, 2025

In September, the average temperature in Soldotna, United States hovers around 11°C (52°F). However, you can experience a chill with minimums dipping to -1°C (30°F), while maximums can reach a pleasant 20°C (69°F). Expect 112 mm (4.4 in) of precipitation over 16 days, contributing to a high average humidity of 97%. Be prepared for a moist and moderately cool climate during your visit!

September Temperature in Soldotna

In September in Soldotna, the average temperature is 11°C (52°F). The maximum can reach 20°C (69°F), and the minimum can be as low as -1°C (30°F). This mild range makes it an ideal time for travelers seeking a mix of outdoor activities and comfortable exploring.

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

The chart illustrates September temperature patterns in Soldotna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Soldotna, September typically has an average temperature of 11°C (52°F), with highs reaching up to 20°C (69°F) and lows dropping to around -1°C (30°F).

Data source: Temperature data for Soldotna generated using information from the Copernicus Climate Change Service.

September Precipitation in Soldotna

In Soldotna in September, the precipitation amount is 112 mm (4.4 in) spread over 16 days.

September Precipitation Trends in Soldotna

The chart displays monthly precipitation patterns in Soldotna, 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 Soldotna, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Soldotna

In Soldotna in September humidity is 97%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapped tightly around you, making travel feel stifling and draining.

September Average Humidity in Soldotna

This chart illustrates the average monthly humidity levels in Soldotna, 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 Soldotna is approximately 97%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Soldotna

In Soldotna 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 Soldotna for better planning.

Maximum UV Index Levels in Soldotna for September

The chart shows the monthly maximum UV Index (UVI) for Soldotna 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 Soldotna typically reaches 4, which falls under the moderate exposure category.

Data source: Soldotna 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 Soldotna Compares to Other Months

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

This table compares monthly weather conditions in Soldotna, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	49 mm (1.9 inches)	95%	low
February Weather	-4°C (25°F)	51 mm (2.0 inches)	95%	low
March Weather	-2°C (28°F)	37 mm (1.5 inches)	90%	moderate
April Weather	4°C (40°F)	37 mm (1.4 inches)	82%	moderate
May Weather	10°C (50°F)	67 mm (2.6 inches)	85%	high
June Weather	13°C (56°F)	55 mm (2.2 inches)	95%	high
July Weather	16°C (60°F)	71 mm (2.8 inches)	100%	high
August Weather	15°C (59°F)	86 mm (3.4 inches)	99%	high
September Weather	11°C (52°F)	112 mm (4.4 inches)	97%	moderate
October Weather	6°C (43°F)	126 mm (5.0 inches)	93%	low
November Weather	-2°C (30°F)	89 mm (3.5 inches)	97%	low
December Weather	-3°C (28°F)	105 mm (4.1 inches)	98%	low