Tri-Cities, Washington, United States weather records
Record high and low temperatures for Tri-Cities, Washington, United States, by month, by season, and all-time, with the dates they occurred, across 1981–2026 of daily climate history. Its hottest day on record reached 115°F on 2021-06-29; its coldest fell to -7°F on 1990-12-29.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 66°F1995-01-31
11°F2024-01-13
|
50°F2011-01-16
-3°F1996-01-30
|
| February | 68°F2007-02-17
9°F1989-02-02
|
49°F2016-02-15
-4°F1989-02-03
|
| March | 79°F2004-03-29
29°F1989-03-02
|
53°F2003-03-13
14°F1989-03-03
|
| April | 91°F2012-04-23
43°F2022-04-11
|
61°F1981-04-30
26°F2008-04-01
|
| May | 101°F1986-05-30
51°F1996-05-03
|
72°F1986-05-30
32°F1999-05-10
|
| June | 115°F2021-06-29
55°F1995-06-06
|
81°F2021-06-29
41°F1984-06-01
|
| July | 110°F2022-07-29
66°F1999-07-02
|
78°F1998-07-27
47°F1999-07-03
|
| August | 108°F2009-08-01
64°F1999-08-30
|
77°F2021-08-03
48°F2008-08-31
|
| September | 101°F1987-09-01
51°F2019-09-29
|
71°F2003-09-04
33°F1985-09-29
|
| October | 87°F2014-10-06
37°F1991-10-28
|
61°F2022-10-02
20°F2019-10-29
|
| November | 74°F1999-11-12
11°F1985-11-28
|
60°F2006-11-06
0°F1985-11-23
|
| December | 67°F2021-12-01
4°F1990-12-29
|
50°F2004-12-10
-7°F1990-12-29
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 68°F2007-02-17
4°F1990-12-29
|
50°F2004-12-10
-7°F1990-12-29
|
| Spring (Mar–May) | 101°F1986-05-30
29°F1989-03-02
|
72°F1986-05-30
14°F1989-03-03
|
| Summer (Jun–Aug) | 115°F2021-06-29
55°F1995-06-06
|
81°F2021-06-29
41°F1984-06-01
|
| Autumn (Sep–Nov) | 101°F1987-09-01
11°F1985-11-28
|
71°F2003-09-04
0°F1985-11-23
|
All-time records
The most extreme value Tri-Cities has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.