September Weather in Crescent City, United States

Last updated: June 24, 2025

In Crescent City, United States during September, the average temperature is a warm 27°C (81°F). Expect a minimum of 19°C (67°F) and a maximum of 35°C (95°F), making it perfect for outdoor activities. However, be prepared for some rain, with a total precipitation of 151 mm (5.9 in) spread over 17 days. The air can feel quite humid, with an average humidity level of 83%.

September Temperature in Crescent City

In September in Crescent City, the average temperature is 27°C (81°F). Maximums can reach 35°C (95°F) and minimums can be as low as 19°C (67°F). This pleasant climate makes Crescent City an ideal destination for travelers seeking warm and enjoyable weather.

September Weather in Crescent City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Crescent City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Crescent City, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 19°C (67°F).

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

September Precipitation in Crescent City

In Crescent City in September, the precipitation amount is 151 mm (5.9 in) over a span of 17 days.

September Precipitation Trends in Crescent City

The chart displays monthly precipitation patterns in Crescent City, 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 Crescent City, September typically receives around 151 mm (5.9 inches) of precipitation spread over approximately 17 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 Crescent City

In Crescent City in September humidity is 83%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making sightseeing and outdoor activities feel more exhausting and requiring frequent breaks to relax in the shade or cool off.

September Average Humidity in Crescent City

This chart illustrates the average monthly humidity levels in Crescent City, 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 Crescent City is approximately 83%, 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 Crescent City

In Crescent City in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Crescent City.

Maximum UV Index Levels in Crescent City for September

The chart shows the monthly maximum UV Index (UVI) for Crescent City 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 Crescent City typically reaches 11, which falls under the extreme exposure category.

Data source: Crescent City 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 Crescent City Compares to Other Months

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

This table compares monthly weather conditions in Crescent City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (59°F)	44 mm (1.7 inches)	83%	moderate
February Weather	18°C (64°F)	55 mm (2.2 inches)	80%	very high
March Weather	19°C (66°F)	29 mm (1.1 inches)	75%	very high
April Weather	22°C (71°F)	84 mm (3.3 inches)	70%	extreme
May Weather	25°C (76°F)	98 mm (3.8 inches)	68%	extreme
June Weather	27°C (80°F)	175 mm (6.9 inches)	75%	extreme
July Weather	27°C (81°F)	213 mm (8.4 inches)	79%	extreme
August Weather	28°C (82°F)	183 mm (7.2 inches)	81%	extreme
September Weather	27°C (81°F)	151 mm (5.9 inches)	83%	extreme
October Weather	24°C (76°F)	94 mm (3.7 inches)	81%	very high
November Weather	19°C (66°F)	63 mm (2.5 inches)	82%	high
December Weather	16°C (62°F)	67 mm (2.6 inches)	84%	moderate