The best times to visit Kennewick for ideal weather are

April 30th to July 8th

or

August 6th to October 7th

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

 

 


Other Kennewick Travel Info

Weather in Kennewick

Temperature

Average temperatures in Kennewick vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 46th 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 Kennewick, 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 96.5°F (35.8°C) with temperatures rarely dropping below 59.4°F (15.2°C) at night.

Kennewick Temperatures (Fahrenheit)

Key
High
Average
Low

Kennewick 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.

Kennewick Perceived Temperature (F)

Key
High
Average
Low

Kennewick Perceived Temperature (C)

Key
High
Average
Low

 

Average Kennewick 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

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan42.534.127.4
Feb50.738.929.9
Mar60.746.434
Apr67.752.437.8
May77.961.344.7
Jun84.968.752.6
Jul95.276.957.9
Aug92.774.356.3
Sep8364.447.8
Oct67.552.439.7
Nov51.440.531.4
Dec41.733.125.5

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan5.81.2-2.6
Feb10.43.8-1.2
Mar15.981.1
Apr19.811.33.2
May25.516.37.1
Jun29.420.411.4
Jul35.124.914.4
Aug33.723.513.5
Sep28.3188.8
Oct19.711.34.3
Nov10.84.7-0.3
Dec5.40.6-3.6

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Kennewick are July, August, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid July. For example, on the week of July 9th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early January with an average of 1 days of significant precipitation the week of January 1st.

When can you find snow in Kennewick? Weather stations report moderate or seasonal snow likely to be deepest around February, especially close to early February. The best time to ski (if at all) in Kennewick is often around around February 5th when fresh powder is deepest. 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 Kennewick.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan8%2.40.9
Feb6%2.90.5
Mar10%00.7
Apr6%00.5
May6%00.7
Jun9%00.8
Jul1%00.1
Aug2%00.2
Sep4%00.3
Oct8%00.6
Nov7%00.6
Dec9%1.61

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan86.12.3
Feb67.41.3
Mar1001.8
Apr601.3
May601.8
Jun902
Jul100.3
Aug200.5
Sep400.8
Oct801.5
Nov701.5
Dec94.12.5

 

Humidity and Wind

Kennewick has some very humid months, and dry months in the opposite season. The least humid month is July (29.3% relative humidity), and the most humid month is January (73.1%).

Wind in Kennewick is usually calm. The windiest month is April, followed by March and June. April’s average wind speed of around 7 knots (8.1 MPH or 13 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid March where average top sustained speeds reach 16.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan4.7Light breeze11.1Significant breeze
Feb5.5Light breeze12.4Significant breeze
Mar6.6Light breeze15.3Significant breeze
Apr7Gentle breeze15.2Significant breeze
May6.2Light breeze13.8Significant breeze
Jun6.4Light breeze13.9Significant breeze
Jul5.1Light breeze11.8Significant breeze
Aug4.9Light breeze12Significant breeze
Sep4.5Light breeze10.7Significant breeze
Oct4.7Light breeze11.3Significant breeze
Nov4.9Light breeze11.9Significant breeze
Dec4.8Light breeze11.4Significant breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan73.1%
Feb65.9%
Mar48.9%
Apr39.2%
May36.9%
Jun34.8%
Jul29.3%
Aug33.8%
Sep42.5%
Oct56.2%
Nov67.5%
Dec72.2%

 

Is it Safe to Travel to Kennewick?

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 Kennewick, WA, US is July, followed by August and May. 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 Kennewick in September. 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 extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 36.1 in September means 36.1% of the tourists vs. July.

 

 

Overall Kennewick Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 82.2°F (27.9°C) and 54°F (12.2°C) with warmer temperatures in the later months. Rain is rare with 2 to 3 days of significant precipitation per month. Spring is the second 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 quite warm. These months see the least precipitation with 0 to 3 days of precipitation per month. June – August is the busiest season for tourism in Kennewick, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 86.7°F (30.4°C) and 42.5°F (5.8°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 2 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 Kennewick to be enjoyable for warm weather travelers. The average high during this season is between 55°F (12.8°C) and 39.9°F (4.4°C). On average, it rains or snows a smalll amount: 2 to 3 times per month. These times of year are fairly slow with tourists.

 

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