September Weather in Everett, United States

Last updated: June 24, 2025

In September, the average temperature in Everett, United States hovers around 15°C (60°F). Expect a minimum of 8°C (47°F) and a maximum soaring to 30°C (86°F). Visitors should be prepared for 114 mm (4.5 in) of precipitation over 12 days, accompanied by an average humidity of 62%. Enjoy the diverse weather on your journey!

September Temperature in Everett

In September in Everett, the average temperature is 15°C (60°F). Maximums can reach 30°C (86°F), and minimums can be as low as 8°C (47°F). This range makes Everett a comfortable destination for travelers seeking mild weather and a pleasant outdoor experience.

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

The chart illustrates September temperature patterns in Everett, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Everett, September typically has an average temperature of 15°C (60°F), with highs reaching up to 30°C (86°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Everett

In Everett in September, the precipitation amount is 114 mm (4.5 in) spread over 12 days.

September Precipitation Trends in Everett

The chart displays monthly precipitation patterns in Everett, 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 Everett, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 12 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 Everett

In Everett in September, humidity is 62%. With an average temperature of 15°C (60°F), this humidity feels like a warm embrace, making it a bit muggy for traveling, yet pleasantly refreshing for leisurely strolls and outdoor exploration.

September Average Humidity in Everett

This chart illustrates the average monthly humidity levels in Everett, 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 Everett is approximately 62%, 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 Everett

In Everett 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 Everett.

Maximum UV Index Levels in Everett for September

The chart shows the monthly maximum UV Index (UVI) for Everett 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 Everett typically reaches 7, which falls under the high exposure category.

Data source: Everett 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 Everett Compares to Other Months

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

This table compares monthly weather conditions in Everett, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	219 mm (8.6 inches)	86%	low
February Weather	4°C (40°F)	209 mm (8.2 inches)	86%	moderate
March Weather	7°C (44°F)	165 mm (6.5 inches)	87%	moderate
April Weather	9°C (49°F)	138 mm (5.4 inches)	84%	high
May Weather	13°C (55°F)	87 mm (3.4 inches)	81%	very high
June Weather	15°C (60°F)	81 mm (3.2 inches)	82%	very high
July Weather	17°C (64°F)	31 mm (1.2 inches)	79%	very high
August Weather	18°C (65°F)	33 mm (1.3 inches)	63%	very high
September Weather	15°C (60°F)	114 mm (4.5 inches)	62%	high
October Weather	11°C (51°F)	196 mm (7.7 inches)	83%	moderate
November Weather	8°C (46°F)	254 mm (10.0 inches)	89%	low
December Weather	5°C (42°F)	247 mm (9.7 inches)	88%	low