In Washington, the climate exhibits extreme variations throughout the year. Summers are characterized by scorching temperatures and clear skies, while winters bring very cold weather and partly cloudy conditions. The climate remains dry year-round. Temperature fluctuations range from 31°F to 101°F over the course of the year, with rare occurrences below 21°F or above 108°F.

For those seeking hot-weather activities, the optimal time to visit Washington is from mid-June to early September, as indicated by the beach/pool score.

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Average Temperature in Washington The hot season extends for 3.5 months, starting from June 1 and lasting until September 15, with an average daily high temperature surpassing 91°F. July stands out as the hottest month in Washington, boasting an average high of 101°F and a low of 75°F.

Conversely, the cold season spans 3.1 months, ranging from November 18 to February 22, with average daily high temperatures dipping below 61°F. Among these months, December emerges as the coldest in Washington, featuring an average low of 32°F and a high of 52°F.

Rainfall To capture the nuances within each month and not just their overall rainfall, we track the precipitation accumulated over a rolling 31-day period centered around each day of the year. Washington displays noticeable seasonal fluctuations in monthly rainfall.

The rainy stretch spans 9.2 months, from July 9 to April 15, with a sliding 31-day rainfall reaching at least 0.5 inches. February stands out as the wettest month in Washington, boasting an average rainfall of 1.1 inches.

Conversely, the dry spell endures for 2.8 months, from April 15 to July 9. June marks the month with the least rain in Washington, with an average rainfall of merely 0.2 inches.