The best times to visit Washington for ideal weather are

April 30th to September 30th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Washington Travel Info

Weather in Washington

Temperature

Average temperatures in Washington vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 37th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Washington, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 82.7°F (28.2°C) with temperatures rarely dropping below 61.6°F (16.4°C) at night.

Washington Temperatures (Fahrenheit)

Key
High
Average
Low

Washington Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Washington Perceived Temperature (F)

Key
High
Average
Low

Washington Perceived Temperature (C)

Key
High
Average
Low

 

Average Washington Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 36.7 28.1 20
Feb 38 28.6 19.6
Mar 51.8 39.6 29.5
Apr 63.9 50.9 39.3
May 72.9 60.6 49.3
Jun 79.4 68.2 57.6
Jul 81.7 70.4 60.2
Aug 80.6 68.4 58
Sep 75.4 62.8 52.2
Oct 64.1 52.4 42.6
Nov 53.5 42.1 32.5
Dec 43.3 34.7 27

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 2.6 -2.2 -6.7
Feb 3.3 -1.9 -6.9
Mar 11 4.2 -1.4
Apr 17.7 10.5 4.1
May 22.7 15.9 9.6
Jun 26.3 20.1 14.2
Jul 27.6 21.3 15.7
Aug 27 20.2 14.4
Sep 24.1 17.1 11.2
Oct 17.8 11.3 5.9
Nov 11.9 5.6 0.3
Dec 6.3 1.5 -2.8

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Washington are January, February, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late July with an average of 2 days of significant precipitation the week of July 23rd.

When can you find snow in Washington? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Washington.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Washington (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 10% 0 1.1
Feb 13% 0 1.4
Mar 15% 0 2.1
Apr 23% 0 2.4
May 21% 0 2.9
Jun 19% 0 2.6
Jul 19% 0 4.1
Aug 17% 0 2.6
Sep 16% 0 2.3
Oct 19% 0 2
Nov 16% 0 1.7
Dec 17% 0 2.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 10 0 2.8
Feb 13 0 3.6
Mar 15 0 5.3
Apr 23 0 6.1
May 21 0 7.4
Jun 19 0 6.6
Jul 19 0 10.4
Aug 17 0 6.6
Sep 16 0 5.8
Oct 19 0 5.1
Nov 16 0 4.3
Dec 17 0 5.8

 

Humidity and Wind

Washington has some very humid months, with other moderately humid months on the other side of the year. The least humid month is April (46.1% relative humidity), and the most humid month is August (70%).

Wind in Washington is usually calm. The windiest month is January, followed by April and February. January’s average wind speed of around 5.9 knots (6.8 MPH or 10.9 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early April where average top sustained speeds reach 15.1 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Washington.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 5.9 Light breeze 13 Significant breeze
Feb 5.6 Light breeze 12.8 Significant breeze
Mar 5.5 Light breeze 12.4 Significant breeze
Apr 5.7 Light breeze 13.7 Significant breeze
May 4 Light breeze 11.2 Significant breeze
Jun 3.6 Barely noticeable 10.3 Gentle breeze
Jul 3.1 Barely noticeable 9.5 Significant breeze
Aug 2.7 Barely noticeable 8.9 Gentle breeze
Sep 2.9 Barely noticeable 9.2 Significant breeze
Oct 4.2 Light breeze 10.8 Gentle breeze
Nov 4.8 Light breeze 11.6 Significant breeze
Dec 5.4 Light breeze 12.1 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 60.2%
Feb 58.9%
Mar 51.1%
Apr 46.1%
May 57.3%
Jun 62.4%
Jul 67.8%
Aug 70%
Sep 68.9%
Oct 63.1%
Nov 54.6%
Dec 64.8%

 

Is it Safe to Travel to Washington?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Washington, PA, US is May, followed by July and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Washington in October. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 50.9 in October means 50.9% of the tourists vs. May.

 

 

Overall Washington Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 78.5°F (25.8°C) and 40.5°F (4.7°C) with warmer temperatures in the later months. Rain is somewhat common with 5 to 7 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with 5 to 6 days of precipitation per month. June – August is the second busiest season for tourism in Washington, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 80.7°F (27.1°C) and 47.9°F (8.8°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Washington to be enjoyable for warm weather travelers. The average high during this season is between 44°F (6.7°C) and 32.8°F (0.4°C). On average, it rains or snows a fair amount: 3 to 5 times per month. These times of year are fairly slow with tourists.

 

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