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Washington · THREADEX · 1894–2026

Tri-Cities, WA

46.270°N, 119.118°W · station PSCthr · 133 years of record
87°F
forecast high · Sep 1

7-Day Forecast

NWS NDFD forecast high temperature for Tri-Cities.
87°TUE9/179°WED9/273°THU9/373°FRI9/477°SAT9/580°SUN9/677°MON9/7

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.
1894: 80°F1895: 85°F1896: 76°F1897: 74°F1898: 76°F1899: 80°F1904: 86°F1905: 86°F1906: 84°F1907: 64°F1908: 88°F1910: 79°F1911: 100°F1912: 72°F1913: 80°F1914: 84°F1915: 80°F1916: 93°F1917: 82°F1918: 82°F1919: 80°F1920: 80°F1921: 77°F1922: 84°F1923: 93°F1924: 82°F1925: 82°F1926: 79°F1927: 77°F1928: 93°F1929: 81°F1930: 85°F1931: 86°F1932: 76°F1933: 81°F1934: 90°F1935: 91°F1936: 87°F1937: 75°F1938: 98°F1939: 73°F1941: 75°F1942: 90°F1943: 84°F1944: 85°F1945: 90°F1946: 86°F1947: 91°F1948: 80°F1949: 93°F1950: 95°F1951: 82°F1952: 86°F1953: 88°F1954: 85°F1955: 92°F1956: 82°F1957: 84°F1958: 88°F1959: 77°F1960: 80°F1961: 80°F1962: 90°F1963: 89°F1964: 73°F1965: 89°F1966: 82°F1967: 100°F1969: 85°F1970: 86°F1971: 67°F1972: 84°F1973: 78°F1974: 87°F1975: 76°F1976: 97°F1977: 80°F1978: 73°F1979: 83°F1980: 78°F1981: 88°F1982: 83°F1983: 89°F1984: 82°F1985: 77°F1986: 84°F1987: 98°F1988: 82°F1989: 81°F1990: 83°F1991: 95°F1992: 84°F1993: 82°F1994: 89°F1995: 89°F1996: 88°F1997: 88°F1998: 101°F1999: 74°F2000: 83°F2001: 87°F2002: 87°F2003: 91°F2004: 96°F2005: 89°F2006: 88°F2007: 83°F2008: 74°F2009: 96°F2010: 82°F2011: 81°F2012: 87°F2013: 93°F2014: 82°F2015: 84°F2016: 87°F2017: 96°F2018: 82°F2019: 94°F2020: 85°F2021: 78°F2022: 102°F2023: 82°F2024: 95°F2025: 94°F87° forecast606570758085909510010519101920193019501960197019801990200020102020
📖 Tri-Cities's full Climate Almanac →

The Numbers

Forecast high · Sep 187°F
Hottest this date since2025
This-date record102°F
This-date rank#42 of 125
Hottest at any time since2026
All-time record115°F (1898)
Odds to tie/break0.0% (daily)
Period of record1894–2026

Record Book

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.
MonthRecord HighRecord Low
Jan74°FJan 10, 1896-27°FJan 21, 1930
Feb74°FFeb 25, 1986-23°FFeb 3, 1950
Mar87°FMar 30, 1911-1°FMar 4, 2019
Apr95°FApr 18, 191018°FApr 2, 1935
May104°FMay 31, 191026°FMay 1, 1905
Jun115°FJun 27, 202135°FJun 4, 1984
Jul115°FJul 27, 193938°FJul 2, 1921
Aug115°FAug 10, 189837°FAug 31, 1924
Sep102°FSep 1, 202221°FSep 24, 1926
Oct90°FOct 6, 20209°FOct 31, 2002
Nov78°FNov 18, 1897-8°FNov 23, 1985
Dec71°FDec 26, 1898-29°FDec 13, 1919
All-time115°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
MonthWarmest lowColdest high
Jan56°FJan 30, 1971-2°FJan 12, 1909
Feb58°FFeb 26, 1932-1°FFeb 3, 1950
Mar56°FMar 19, 202622°FMar 1, 1993
Apr62°FApr 25, 196441°FApr 1, 1936
May73°FMay 29, 193450°FMay 1, 1915
Jun80°FJun 27, 189656°FJun 7, 1995
Jul82°FJul 5, 190665°FJul 2, 1966
Aug80°FAug 8, 189862°FAug 30, 1907
Sep71°FSep 1, 196750°FSep 29, 2019
Oct67°FOct 3, 194730°FOct 31, 1935
Nov61°FNov 10, 19899°FNov 24, 1985
Dec61°FDec 18, 1917-2°FDec 13, 1919
All-time82°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.
Jan: 42°FJan: 28°FFeb: 48°FFeb: 29°FMar: 59°FMar: 34°FApr: 67°FApr: 39°FMay: 76°FMay: 47°FJun: 83°FJun: 53°FJul: 92°FJul: 58°FAug: 91°FAug: 57°FSep: 81°FSep: 49°FOct: 66°FOct: 40°FNov: 50°FNov: 32°FDec: 41°FDec: 28°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise5:17 AM
Sunset6:35 PM
Solar noon11:56 AM
Daylight13h 19m · losing 22 min/wk
Local standard time (no DST), level horizon.

Location

46.27°N, 119.12°W

Nearby Stations

Pendleton, OR41 mi SEYakima, WA70 mi WLewiston, ID100 mi EPullman, WA100 mi EBaker City, OR117 mi SESpokane, WA119 mi NE

The Last 6 Weeks

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.
Tri-Cities, WA — last six weeks of daily high

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.
Tri-Cities, WA — 2026 daily high trace
Download year chart

Every Day Since 1894

Each cell is one day's high at Tri-Cities, coloured by temperature — 133 years of record, so heat waves read as warm streaks and cold snaps as blue.
Tri-Cities, WA daily high heat map 1894–2026

Days Above the Mark

How many days a year hit a given high at Tri-Cities — counted through Sep 1 each year, so you can see whether 2026 is running hot. Pick a threshold:
59 days ≥90°F so far in 2026 — tied for the 14th most in 133 years. Normal for this point: 45. Record: 70 in 1961.

Share Card

A ready-to-share summary of Tri-Cities's outlook — post it, or link this page.
Tri-Cities, WA hot share card
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