September Weather in Poulsbo, United States

Last updated: June 24, 2025

In Poulsbo, United States, the average temperature in September hovers around 16°C (61°F), with the mercury dipping as low as 8°C (46°F) and soaring up to 27°C (80°F). Visitors can expect about 115 mm (4.5 in) of precipitation spread across 15 days, resulting in an average humidity of 74%. Prepare accordingly for a mix of mild temps and a touch of moisture!

September Temperature in Poulsbo

In September in Poulsbo, the average temperature is 16°C (61°F), with maximums reaching 27°C (80°F) and minimums dipping as low as 8°C (46°F). This mild climate makes Poulsbo an ideal destination for travelers looking to enjoy comfortable weather and a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Poulsbo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Poulsbo, September typically has an average temperature of 16°C (61°F), with highs reaching up to 27°C (80°F) and lows dropping to around 8°C (46°F).

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

September Precipitation in Poulsbo

In Poulsbo in September, the total precipitation amount is 115 mm (4.5 in) over a span of 15 days.

September Precipitation Trends in Poulsbo

The chart displays monthly precipitation patterns in Poulsbo, 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 Poulsbo, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 15 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Poulsbo

In Poulsbo in September humidity is 74%. With an average temperature of 16°C (61°F), this humidity feels like a damp blanket wrapping around you, making traveling quite uncomfortable as the air feels thick and muggy, potentially leading to fatigue and a longing for a cool breeze.

September Average Humidity in Poulsbo

This chart illustrates the average monthly humidity levels in Poulsbo, 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 Poulsbo is approximately 74%, 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 Poulsbo

In Poulsbo 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 Poulsbo.

Maximum UV Index Levels in Poulsbo for September

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

Data source: Poulsbo 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 Poulsbo Compares to Other Months

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

This table compares monthly weather conditions in Poulsbo, 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 (43°F)	172 mm (6.8 inches)	86%	low
February Weather	5°C (41°F)	154 mm (6.1 inches)	84%	moderate
March Weather	7°C (44°F)	129 mm (5.1 inches)	85%	moderate
April Weather	9°C (49°F)	119 mm (4.7 inches)	83%	high
May Weather	13°C (55°F)	92 mm (3.6 inches)	84%	very high
June Weather	15°C (60°F)	109 mm (4.3 inches)	84%	very high
July Weather	18°C (65°F)	52 mm (2.0 inches)	82%	very high
August Weather	19°C (66°F)	45 mm (1.8 inches)	73%	very high
September Weather	16°C (61°F)	115 mm (4.5 inches)	74%	high
October Weather	11°C (52°F)	162 mm (6.4 inches)	83%	moderate
November Weather	8°C (47°F)	185 mm (7.3 inches)	86%	moderate
December Weather	6°C (43°F)	194 mm (7.7 inches)	87%	low