46.270°N, 119.118°W · station PSCthr · 133 years of record
87°F
HOTTEST SEP 1 SINCE 2025
forecast high · Sep 1
7-Day Forecast
NWS NDFD forecast high temperature for Tri-Cities.
This Day in History
Every year's high on each of the next 7 forecast dates at Tri-Cities — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#42 / 125
warmest Sep 1 in 125 yrs of record
Warmest Sep 1 ever
102°F
set in 2022
Coolest Sep 1 ever
64°F
set in 1907
Forecast high 87°F — 42nd warmest Sep 1 of 125 years · record 102°F (2022) · warmest since 2025.
Ranks
#98 / 126
warmest Sep 2 in 126 yrs of record
Warmest Sep 2 ever
100°F
set in 1911
Coolest Sep 2 ever
68°F
set in 1971
Forecast high 79°F — 98th warmest Sep 2 of 126 years · record 100°F (1911) · warmest since 2025.
Ranks
#123 / 126
warmest Sep 3 in 126 yrs of record
Warmest Sep 3 ever
99°F
set in 2020
Coolest Sep 3 ever
68°F
set in 1941
Forecast high 73°F — 123rd warmest Sep 3 of 126 years · record 99°F (2020) · warmest since 2025.
Ranks
#123 / 127
warmest Sep 4 in 127 yrs of record
Warmest Sep 4 ever
100°F
set in 1911
Coolest Sep 4 ever
68°F
set in 1895
Forecast high 73°F — 123rd warmest Sep 4 of 127 years · record 100°F (1911) · warmest since 2025.
Ranks
#100 / 126
warmest Sep 5 in 126 yrs of record
Warmest Sep 5 ever
99°F
set in 1904
Coolest Sep 5 ever
57°F
set in 1911
Forecast high 77°F — 100th warmest Sep 5 of 126 years · record 99°F (1904) · warmest since 2025.
Ranks
#78 / 127
warmest Sep 6 in 127 yrs of record
Warmest Sep 6 ever
98°F
set in 1904
Coolest Sep 6 ever
67°F
set in 1911
Forecast high 80°F — 78th warmest Sep 6 of 127 years · record 98°F (1904) · warmest since 2025.
Ranks
#98 / 125
warmest Sep 7 in 125 yrs of record
Warmest Sep 7 ever
98°F
set in 1904
Coolest Sep 7 ever
64°F
set in 1897
Forecast high 77°F — 98th warmest Sep 7 of 125 years · record 98°F (1904) · warmest since 2025.
The hottest and coldest ever recorded at Tri-Cities in each calendar month, and for the whole 1894–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
74°FJan 10, 1896
-27°FJan 21, 1930
Feb
74°FFeb 25, 1986
-23°FFeb 3, 1950
Mar
87°FMar 30, 1911
-1°FMar 4, 2019
Apr
95°FApr 18, 1910
18°FApr 2, 1935
May
104°FMay 31, 1910
26°FMay 1, 1905
Jun
115°FJun 27, 2021
35°FJun 4, 1984
Jul
115°FJul 27, 1939
38°FJul 2, 1921
Aug
115°FAug 10, 1898
37°FAug 31, 1924
Sep
102°FSep 1, 2022
21°FSep 24, 1926
Oct
90°FOct 6, 2020
9°FOct 31, 2002
Nov
78°FNov 18, 1897
-8°FNov 23, 1985
Dec
71°FDec 26, 1898
-29°FDec 13, 1919
All-time
115°FAug 10, 1898
-29°FDec 13, 1919
2026 Records So Far
Records set or tied at Tri-Cities so far this year — through Aug 30.
Record Highs in 2026
0 broke
plus 1 tied — daily record highs set this year
Record Lows in 2026
0 broke
plus 0 tied — daily record lows set this year
Record Warm Nights & Cold Days
Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.
Warmest low ever
82°F
record high minimum — the night it never cooled · Jul 5, 1906
Coldest high ever
-2°F
record low maximum — the day it never warmed · Jan 12, 1909
Month
Warmest low
Coldest high
Jan
56°FJan 30, 1971
-2°FJan 12, 1909
Feb
58°FFeb 26, 1932
-1°FFeb 3, 1950
Mar
56°FMar 19, 2026
22°FMar 1, 1993
Apr
62°FApr 25, 1964
41°FApr 1, 1936
May
73°FMay 29, 1934
50°FMay 1, 1915
Jun
80°FJun 27, 1896
56°FJun 7, 1995
Jul
82°FJul 5, 1906
65°FJul 2, 1966
Aug
80°FAug 8, 1898
62°FAug 30, 1907
Sep
71°FSep 1, 1967
50°FSep 29, 2019
Oct
67°FOct 3, 1947
30°FOct 31, 1935
Nov
61°FNov 10, 1989
9°FNov 24, 1985
Dec
61°FDec 18, 1917
-2°FDec 13, 1919
All-time
82°FJul 5, 1906
-2°FJan 12, 1909
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
37 days
record run, ended Aug 24 1942
So far in 2026
59 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Tri-Cities's own 1991–2020 record. Today's normal high: 86°F · forecast is +1° vs normal.
Tri-Cities's observed daily high for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.
2026 So Far
Every day this year against Tri-Cities's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.