Ilwaco (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ilwaco.
Climate overview of Ilwaco
Ilwaco, Washington State, United States of America, has a moderate seasonal temperature range, with August reaching 19°C (66°F) and December cooling to 9°C (48°F).
The city receives considerable rain/snowfall, with around 1937 mm (76 in) annually. November is the wettest month. It has distinct dry (July to August) and wet (October to March) seasons. Sunshine peaks in July, when the city sees around 11.0 hours of sunshine per day.
Ilwaco Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ilwaco - and find the best time to visit.
Monthly Temperature in Ilwaco
In Ilwaco, seasonal changes bring about a moderate variation in temperatures. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in August to a chilly 9°C (48°F) in the coolest month, December.
Nights vary from 12°C (54°F) in August to around 3°C (37°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ilwaco
Ilwaco is known for its substantial rain/snowfall, with annual precipitation reaching 1937 mm (76 in). The climate in Ilwaco shows significant variation throughout the year. Expect heavy rainfall in November, the wettest month, with an average of 302 mm (12 in) of precipitation over 22 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 28 mm (1.1 in) of rainfall over 9 rainy days. For more details, please visit our Ilwaco 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 Ilwaco
For those who appreciate different seasons, Ilwaco serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.0 hours of sunshine daily, and embrace the darker days in December, offering only 2.1 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Ilwaco
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July
- Warmest weather: July, August and September
- Most sunshine: July
- Fewest rainy days: July and August
- Wettest months: January, February, March, October, November and December, when rainfall is highest.
- Seasonal pattern: Distinct dry (July to August) and wet (October to March) seasons
Frequently asked questions about the climate in Ilwaco
What is the best time to visit Ilwaco?
July typically offers the most optimal weather in Ilwaco. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Ilwaco has distinct dry (July to August) and wet (October to March) seasons.
What temperatures can I expect in Ilwaco?
Daytime highs range from 9°C (48°F) in December to 19°C (66°F) in August. Nighttime lows range from 3°C (37°F) to 12°C (54°F).
How much rain does Ilwaco get?
Annual rainfall is around 1937 mm (76 in). November is the wettest month with 302 mm (12 in), while July is the driest with 28 mm (1.1 in).
How sunny is Ilwaco?
Ilwaco receives around 2,342 hours of sunshine per year. July is the sunniest month with 330 hours, while December is the cloudiest with just 62 hours. Overall, Ilwaco enjoys abundant sunshine.
Ilwaco 3-Day Forecast
Ilwaco (WA) 3-Day Forecast
Ilwaco on the map
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