Monroe (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Monroe.
Climate overview of Monroe
Temperatures in Monroe, Washington State, United States of America, vary greatly throughout the year. August is the hottest month at 25°C (77°F), while December is the coldest at 6°C (43°F).
Rain/snowfall is high, totalling around 1492 mm (59 in) per year. November is the wettest month and July the driest. The city also experiences distinct dry (July to August) and wet (November to January) seasons, with warm summers and cold winters. The sunniest month is July, with 10.4 hours of sunshine per day on average.
Monroe Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Monroe - and find the best time to visit.
Monthly Temperature in Monroe
The climate in Monroe is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 25°C (77°F) in August, the warmest time of the year, to a chilly 6°C (43°F) during cooler months like December.
At night, you can expect temperatures ranging from 12°C (54°F) in August to around 1°C (34°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Monroe
Monroe has a notably wet climate with abundant precipitation, recording 1492 mm (59 in) of rain/snowfall per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, November it receives heavy rainfall, averaging 222 mm (8.7 in) of precipitation, recorded across 22 rainy days. In contrast, the driest month July brings less rainfall, with 25 mm (1 in) over 6 rainy days. For more details, please visit our Monroe 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 Monroe
Seasonal changes in sunshine hours are quite dramatic in Monroe. While July receives considerable daily sunshine with up to 10.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Monroe by Month
The relative humidity is high throughout the year in Monroe.
The city experiences its highest humidity in December, reaching 80%. In July, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Monroe
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
- Seasonal pattern: Distinct dry (July to August) and wet (November to January) seasons, with warm summers and cold winters
Frequently asked questions about the climate in Monroe
What is the best time to visit Monroe?
June, July, August and September typically offer the most optimal weather in Monroe. In contrast, January, February, March, November and December tend to have less optimal conditions. Monroe has distinct dry (July to August) and wet (November to January) seasons, with warm summers and cold winters.
What temperatures can I expect in Monroe?
Daytime highs range from 6°C (43°F) in December to 25°C (77°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 Monroe get?
Annual rainfall is around 1492 mm (59 in). November is the wettest month with 222 mm (8.7 in), while July is the driest with 25 mm (1 in).
How sunny is Monroe?
Monroe receives around 2,171 hours of sunshine per year. July is the sunniest month with 312 hours, while December is the cloudiest with just 54 hours. Overall, Monroe enjoys abundant sunshine.
Monroe 3-Day Forecast
Monroe on the map
Monroe is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
33°C (91°F) Orlando33°C (91°F) Miami Beach32°C (90°F) Destin32°C (90°F) New York City
29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.