Tri-Cities, Washington, United States climate
Average temperatures, precipitation and all-time records for Tri-Cities, Washington, United States, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is July, averaging a high of 95°F, and its coldest is January, with an average low of 29°F.
The Tri-Cities are three closely linked cities at the confluence of the Yakima, Snake, and Columbia Rivers in the U.S. state of Washington. Located in the Columbia Basin of Eastern Washington, the cities border one another, making the Tri-Cities seem like one uninterrupted mid-sized city. via Wikipedia
How today compares
Latest recorded day: 2026-07-24. Each reading placed on Tri-Cities, Washington, United States's own ±7-day seasonal distribution.
Tri-Cities average temperatures by month
Typical daily high and low, and average precipitation, for each month in Tri-Cities, Washington, United States, based on 1980–2026 records. The wettest month is January (0.00 in on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 42°F | 29°F | 0.00 in |
| February | 49°F | 32°F | 0.00 in |
| March | 60°F | 38°F | 0.00 in |
| April | 69°F | 44°F | 0.00 in |
| May | 79°F | 52°F | 0.00 in |
| June | 85°F | 57°F | 0.00 in |
| July | 95°F | 64°F | 0.00 in |
| August | 94°F | 63°F | 0.00 in |
| September | 83°F | 54°F | 0.00 in |
| October | 68°F | 45°F | 0.00 in |
| November | 52°F | 36°F | 0.00 in |
| December | 41°F | 29°F | 0.00 in |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -10°F to 115°F scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 118°F on 2021-06-30
- Coldest day on record: -13°F on 1985-11-24
Percentiles compare each day to Tri-Cities, Washington, United States's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →