NWS, American, European side by side around Tri-Cities and nearby towns.Live rain radar →
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Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
Tri-Cities, WA is at its warmest in Jul (average highs near 98°F) and coldest in Jan (lows around 28°F), with roughly 10 in of precipitation across the year. Below, compare what NWS, American, European forecast for Tri-Cities right now, and see exactly where they disagree.
Tri-Cities climate by month
average daytime high and overnight low across a typical year
Jan
40°
28°
Feb
48°
32°
Mar
56°
35°
Apr
66°
43°
May
79°
54°
Jun
87°
60°
Jul
98°
68°
Aug
93°
65°
Sep
83°
57°
Oct
67°
45°
Nov
49°
36°
Dec
43°
34°
Common questions
What's the weather in Tri-Cities today?
On this page we show what NWS, American, European each forecast for Tri-Cities today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Tri-Cities today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Tri-Cities and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Tri-Cities?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Tri-Cities forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Tri-Cities?
Jul is typically the warmest month in Tri-Cities, with average highs around 98°F.
How cold does Tri-Cities get?
The coldest month in Tri-Cities is Jan, when overnight lows average about 28°F.
How much rain does Tri-Cities get?
Tri-Cities sees roughly 10 in of precipitation a year, with Dec usually the wettest month.
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.