Kennewick Climate by Month
Kennewick, Washington, United States
Hot summers and cold winters, with little rain.
Kennewick has hot summers and cold winters, with little rain. July is the warmest month, with highs around 92°F (33°C); December is the coolest at 41°F (5°C), and nights dip to 28°F (-2°C). It gets only 7.3 in (186 mm) of rain a year. July to September are almost completely dry.
- Warmest month
- 92°F(33°C)
- Average high, July
- Coldest nights
- 28°F(-2°C)
- Average low, January
- Rain per year
- 7.3 in(186 mm)
- No clear rainy season
- Humidity
- 61%
- Sunniest: July
Best and worst months in Kennewick
Best for weatherThe most comfortable weather comes in May, with highs around 76°F (24°C) and almost no rain.
Least pleasantDecember and January are the least pleasant; December is the coldest, with highs of only 41°F (5°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Kennewick weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 42°F(5°C) | 28°F(-2°C) | 1.0 in(26 mm) | 88% | 1.1 |
| FebFebruary | 48°F(9°C) | 31°F(-1°C) | 0.7 in(19 mm) | 73% | 2.2 |
| MarMarch | 59°F(15°C) | 35°F(2°C) | 0.7 in(19 mm) | 64% | 3.4 |
| AprApril | 67°F(19°C) | 41°F(5°C) | 0.4 in(11 mm) | 57% | 5.0 |
| MayMayBest | 76°F(24°C) | 49°F(9°C) | 0.6 in(14 mm) | 47% | 6.0 |
| JunJune | 82°F(28°C) | 55°F(13°C) | 0.4 in(11 mm) | 46% | 6.8 |
| JulJuly | 92°F(33°C) | 60°F(16°C) | 0.2 in(4 mm) | 39% | 7.3 |
| AugAugust | 91°F(33°C) | 58°F(14°C) | 0.2 in(5 mm) | 42% | 6.3 |
| SepSeptember | 81°F(27°C) | 50°F(10°C) | 0.2 in(6 mm) | 47% | 4.6 |
| OctOctober | 66°F(19°C) | 41°F(5°C) | 0.7 in(19 mm) | 65% | 2.7 |
| NovNovember | 51°F(10°C) | 34°F(1°C) | 0.9 in(24 mm) | 77% | 1.4 |
| DecDecember | 41°F(5°C) | 28°F(-2°C) | 1.1 in(28 mm) | 88% | 0.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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