Kennewick weather by month
Average highs run from 41°F in January to 92°F in July, and January nights average 28°F. It gets 8 inches of rain and melted snow a year and 2 inches of snow. Expect about 55 days a year at 90°F or hotter. Nights drop below freezing about 112 times a year. The most comfortable months are May to June and September.
Best time to visit Kennewick
For comfortable weather, go in May to June and September. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 41°F | 28°F | 1.0 in | 0.2 in | 4 | 0 | 21 | cold |
| February | 49°F | 28°F | 0.6 in | 0.2 in | 2 | 0 | 20 | cool |
| March | 59°F | 33°F | 0.7 in | 0.1 in | 3 | 0 | 15 | cool |
| April | 67°F | 38°F | 0.7 in | 0.0 in | 2 | 0 | 6 | mild days, chilly nights |
| May | 77°F | 46°F | 0.7 in | 0.0 in | 2 | 3 | 2 | warm |
| June | 83°F | 53°F | 0.6 in | 0.0 in | 2 | 7 | 0 | warm |
| July | 93°F | 57°F | 0.2 in | 0.0 in | 0 | 22 | 0 | hot |
| August | 91°F | 56°F | 0.3 in | 0.0 in | 1 | 19 | 0 | hot |
| September | 81°F | 48°F | 0.3 in | 0.0 in | 1 | 5 | 0 | warm |
| October | 66°F | 38°F | 0.7 in | 0.0 in | 2 | 0 | 8 | mild days, chilly nights |
| November | 50°F | 32°F | 0.9 in | 0.1 in | 2 | 0 | 17 | cool |
| December | 41°F | 27°F | 1.0 in | 1.4 in | 4 | 0 | 23 | cold |
| Year | 66°F avg | 40°F avg | 7.6 in | 2.0 in | 25 | 55 | 112 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Pasco Tri Cities Airport, WA (USW00024163), 6.4 miles from the city center; snowfall from Ice Harbor Dam, WA. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Kennewick
The shortest day is December 21, with 8h 36m of daylight; the longest is June 21, with 15h 46m. The earliest sunset comes around December 5 (4:10 pm) and the latest around June 24 (8:52 pm). The sun sets after 8 pm on 112 days a year.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:35 am | 4:37 pm | 9h 02m |
| February | 6:59 am | 5:22 pm | 10h 23m |
| March | 7:09 am | 7:02 pm | 11h 53m |
| April | 6:10 am | 7:44 pm | 13h 34m |
| May | 5:24 am | 8:22 pm | 14h 59m |
| June | 5:04 am | 8:49 pm | 15h 45m |
| July | 5:20 am | 8:44 pm | 15h 24m |
| August | 5:56 am | 8:05 pm | 14h 09m |
| September | 6:35 am | 7:07 pm | 12h 32m |
| October | 7:14 am | 6:09 pm | 10h 55m |
| November | 6:58 am | 4:23 pm | 9h 26m |
| December | 7:32 am | 4:10 pm | 8h 38m |
Calculated for 2026 at the center of Kennewick with NOAA's solar equations, in local clock time (Pacific Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Kennewick getting warmer?
The last 10 years averaged 1.6°F warmer than the 20th century. See the climate stripes for Kennewick.Frequently asked questions
What is the warmest month in Kennewick?
July is the warmest month, with an average high of 93°F and an average low of 57°F (NOAA 1991-2020 normals).
What is the coldest month in Kennewick?
December is the coldest, with average lows of 27°F and highs of 41°F.
What is the rainiest month in Kennewick?
January gets the most precipitation, 1.0 inches on average. July is the driest at 0.2 inches.
Does it snow in Kennewick?
Yes. Kennewick averages 2 inches of snow a year.
When is the best time to visit Kennewick?
For comfortable weather, May to June and September. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Kennewick?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Kennewick profile.
Compare the weather: Kennewick vs Pasco, Kennewick vs Yakima, Kennewick vs Spokane, Kennewick vs Spokane Valley.