Tomorrow in Tri-Cities looks
overcast, with a high of 58°
and an overnight low of 37°.
Rain is unlikely (8% chance).
Winds top out near 6 mph,
and the UV index reaches 2 (low).
Tri-Cities receives about 256 mm (10.1 inches) of precipitation a year and averages 9.6 hours of sunshine per day. July is the driest month in the dataset.
What dryness changes day to day
Rain and sunshine
About 256 mm (10.1 inches) falls across 66 wet days, with 9.6 hours of sunshine on an average day.
Typical day and night
Tri-Cities averages 67°F (20°C) by day and 46°F (8°C) at night across the year.
Seasonal change
July highs reach 96°F (36°C), while January lows fall to 29°F (-2°C).
9.6 hours a day averaged over the year, peaking in July at 14.3 hours.
What is the rainiest month in Tri-Cities?
December, at 1.6 inches (41 mm) over about 10 days. July is the driest month, at less than 1 mm.
Does it snow in Tri-Cities?
Yes - about 7 days a year carry measurable snowfall, concentrated December through February.
What is the hottest month in Tri-Cities?
July, averaging 96°F (36°C) by day and 67°F (20°C) overnight. The hottest single day in our 2015-2024 record for this location reached 118°F (48°C).
What is the best time to visit Tri-Cities?
April to May and September to October is the sweet spot for Tri-Cities - temperatures sit either side of the peak heat rather than in it. Expect 74°F (23°C) in the afternoon and around 5 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in April.
Which month is coolest in Tri-Cities?
January, with highs of 42°F (5°C) and lows near 29°F (-2°C). The coldest day in the 2015-2024 record fell to -3°F (-20°C).