Tri-Cities Weather Year-Round — Best Time to Visit
Tri-Cities, United States has mild weather year-round. The best time to visit is August (score: 98/100). Annual average high: 19.4°C, total rainfall: 229mm.
When is the best time to visit Tri-Cities?
98
August is the best month to visit Tri-Cities with a travel score of 98/100 (Excellent).
Expect highs of 33.4°C, 1 rain days, and 13.2 hours of daily sunshine.
View August weather details →Travel Score by Month
50
Jan
62
Feb
74
Mar
84
Apr
91
May
96
Jun
98
Jul
98
Aug
98
Sep
82
Oct
59
Nov
48
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Tri-Cities each month?
19.4°C
Avg High
7.9°C
Avg Low
229mm
Annual Rain
How much rain does Tri-Cities get?
Tri-Cities receives 229mm of rain annually. The wettest month is typically December with 37mm, while July is the driest.
What is the weather like each month in Tri-Cities?
January
50
6°C
Low: -1°C
8 rain days
Mixed
February
62
9°C
Low: 0°C
6 rain days
Good
March
74
14°C
Low: 3°C
5 rain days
Good
April
84
19°C
Low: 7°C
4 rain days
Excellent
May
91
25°C
Low: 11°C
4 rain days
Excellent
June
96
29°C
Low: 15°C
3 rain days
Excellent
July
98
35°C
Low: 19°C
1 rain days
Excellent
August
Best time to visit98
33°C
Low: 19°C
1 rain days
Excellent
September
98
28°C
Low: 14°C
2 rain days
Excellent
October
82
19°C
Low: 8°C
5 rain days
Excellent
November
59
11°C
Low: 2°C
8 rain days
Mixed
December
48
5°C
Low: -1°C
9 rain days
Mixed
Compare Tri-Cities
Popular comparisons:
🎉Planning a Trip to United States?
Check public holidays and long weekends before you book.
What cities are near Tri-Cities?
Data based on 1994–2024 averages · Last updated: 2024-12-31