Climate averages 1991–2020
Tri-Cities weather
in January.
A cold, fairly dry month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Tri-Cities: daytime highs average 6.0°C and nights cool to about -1.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 34 mm of rain on roughly 8 days, which makes January a fairly dry month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 04 min on an average January day.
The nearest other city in this atlas is Kennewick (6 km away). In January its highs average 5.7°C, about as warm as Tri-Cities, with 34 mm of rain.
Among the 498 cities listed in the United States, Tri-Cities ranks joint 304th of 498 for the warmest January highs and joint 67th of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Tri-Cities is 3.5°C cooler than that mean.
From January to February, average highs rise by 3.3°C to 9.3°C, and monthly rainfall falls from 34 mm to 23 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tri-Cities climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 6.0°C-1.5°C | -1.5°C | 34 | 8.1 | 9.19 h |
| February | 9.3°C-0.3°C | -0.3°C | 23 | 6.2 | 10.310 h |
| March | 14.3°C2.8°C | 2.8°C | 24 | 5.9 | 11.912 h |
| April | 19.3°C6.6°C | 6.6°C | 17 | 4.9 | 13.514 h |
| May | 25.0°C11.5°C | 11.5°C | 18 | 4.5 | 15.015 h |
| June | 28.9°C15.3°C | 15.3°C | 13 | 2.8 | 15.716 h |
| July | 34.2°C19.2°C | 19.2°C | 3.8 | 1.0 | 15.415 h |
| August | 33.2°C18.6°C | 18.6°C | 4.2 | 1.0 | 14.214 h |
| September | 27.5°C14.0°C | 14.0°C | 6.9 | 1.8 | 12.613 h |
| October | 18.9°C7.9°C | 7.9°C | 22 | 5.0 | 11.011 h |
| November | 10.7°C2.3°C | 2.3°C | 29 | 7.3 | 9.59 h |
| December | 5.6°C-1.2°C | -1.2°C | 35 | 8.4 | 8.79 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Kennewick in JanuaryUnited States · 6 kmHigh 5.7°C · Low -1.7°C · 34 mm rain
- Yakima in JanuaryUnited States · 108 kmHigh 2.7°C · Low -4.3°C · 58 mm rain
- Spokane in JanuaryUnited States · 207 kmHigh 2.2°C · Low -4.6°C · 69 mm rain
- Spokane Valley in JanuaryUnited States · 217 kmHigh 1.9°C · Low -4.9°C · 78 mm precipitation
- Auburn in JanuaryUnited States · 259 kmHigh 7.4°C · Low 1.4°C · 190 mm rain
- Kent in JanuaryUnited States · 263 kmHigh 7.7°C · Low 1.8°C · 176 mm rain
- Gresham in JanuaryUnited States · 264 kmHigh 7.5°C · Low 1.1°C · 220 mm rain
- Federal Way in JanuaryUnited States · 266 kmHigh 6.8°C · Low 1.1°C · 190 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tri-Cities) is explained once on the Tri-Cities year overview and on the Sources, method and limits page.
Kennewick lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.