Weather in Tri-Cities, Washington, United States
Historical monthly conditions · 2021–2025
Monthly averages
Average daily air-temperature lows/highs and peak wind gusts. Rain is the average monthly total.
| Month | Avg low | Avg high | Rain | Cloud cover | Avg peak gust |
|---|---|---|---|---|---|
| January | -2°C | 5°C | 34.8 mm | 72% | 24.0 km/h |
| February | -1°C | 8°C | 23.4 mm | 62% | 32.2 km/h |
| March | 4°C | 15°C | 20.1 mm | 60% | 34.9 km/h |
| April | 6°C | 20°C | 20.2 mm | 51% | 38.0 km/h |
| May | 11°C | 25°C | 14.0 mm | 47% | 38.4 km/h |
| June | 16°C | 31°C | 8.7 mm | 38% | 37.4 km/h |
| July | 19°C | 37°C | 1.2 mm | 15% | 32.1 km/h |
| August | 18°C | 34°C | 2.0 mm | 29% | 31.7 km/h |
| September | 14°C | 29°C | 7.7 mm | 35% | 29.6 km/h |
| October | 7°C | 20°C | 20.8 mm | 44% | 29.5 km/h |
| November | 2°C | 10°C | 43.7 mm | 69% | 30.7 km/h |
| December | 0°C | 6°C | 47.9 mm | 77% | 30.4 km/h |
Weather match by month
Feels like 15°C–30°C · cloud ≤60% · rain ≤0.1 mm/h · gust ≤50 km/h
Feels-like temperature accounts for humidity and wind in shade. Percentages cover 08:00–20:00 local solar time.
| Month | Match rate | |
|---|---|---|
| January | 0.0% | |
| February | 0.2% | |
| March | 2.7% | |
| April | 13.1% | |
| May | 33.5% | |
| June | 39.9% | |
| July | 39.1% | |
| August | 40.4% | |
| September | 56.3% | |
| October | 26.5% | |
| November | 0.3% | |
| December | 0.1% |
About this location and data
- Population
- 244,036
- Elevation
- 229 m
- Coordinates
- 46.25°N, 119.20°W
2021-2025 recent-weather sample (not a 30-year normal).
How the weather scores are calculatedNearby places with higher scores
Annual results for the default weather criteria: