Mount Vernon (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Mount Vernon.
Climate overview of Mount Vernon
Mount Vernon, Washington State, United States of America, sees big temperature differences between seasons, with August peaking at 23°C (73°F) and December dropping to 7°C (45°F).
With around 1089 mm (43 in) of annual rain/snowfall, Mount Vernon has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has a distinct dry season from July to August, with warm summers and cold winters. The wettest month is November. The most sunshine falls in July, with an average of 9.4 hours of daily sunshine.
Mount Vernon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mount Vernon - and find the best time to visit.
Monthly Temperature in Mount Vernon
Visitors to Mount Vernon can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 23°C (73°F) in August. In December, the coolest month of the year, temperatures drop to a chilly 7°C (45°F).
At night, temperatures range from around 12°C (54°F) in August to 1°C (34°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Mount Vernon
Mount Vernon is known for its substantial rain/snowfall, with annual precipitation reaching 1089 mm (43 in). Mount Vernon can be quite wet during November, receiving approximately 165 mm (6.5 in) of precipitation over 22 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 23 mm (0.9 in) of precipitation spread across 7 rainy days. For more details, please visit our Mount Vernon Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Mount Vernon
Mount Vernon can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.4 hours of sunshine daily. In contrast, the city experiences much darker days in November, with only 2.0 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Mount Vernon
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Wettest months: January, February, March, October, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from July to August, with warm summers and cold winters
Frequently asked questions about the climate in Mount Vernon
What is the best time to visit Mount Vernon?
June, July, August and September typically offer the most optimal weather in Mount Vernon. In contrast, January, February, March, November and December tend to have less optimal conditions. Mount Vernon has a distinct dry season from July to August, with warm summers and cold winters.
What temperatures can I expect in Mount Vernon?
Daytime highs range from 7°C (45°F) in December to 23°C (73°F) in August. Nighttime lows range from 1°C (34°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Mount Vernon get?
Annual rainfall is around 1089 mm (43 in). November is the wettest month with 165 mm (6.5 in), while July is the driest with 23 mm (0.9 in).
How sunny is Mount Vernon?
Mount Vernon receives around 1,887 hours of sunshine per year. July is the sunniest month with 281 hours, while November is the cloudiest with just 61 hours.
Mount Vernon 3-Day Forecast
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