42.147°N, 121.725°W · station LMTthr · 130 years of record
72°F
HOTTEST SEP 1 SINCE 2025
forecast high · Sep 1
7-Day Forecast
NWS NDFD forecast high temperature for Klamath Falls.
This Day in History
Every year's high on each of the next 7 forecast dates at Klamath Falls — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#107 / 119
warmest Sep 1 in 119 yrs of record
Warmest Sep 1 ever
97°F
set in 1902
Coolest Sep 1 ever
58°F
set in 1912
Forecast high 72°F — 107th warmest Sep 1 of 119 years · record 97°F (1902) · warmest since 2025.
Ranks
#120 / 121
warmest Sep 2 in 121 yrs of record
Warmest Sep 2 ever
97°F
set in 1902
Coolest Sep 2 ever
52°F
set in 2000
Forecast high 57°F — 120th warmest Sep 2 of 121 years · record 97°F (1902) · warmest since 2025.
Ranks
#122 / 122
warmest Sep 3 in 122 yrs of record
Warmest Sep 3 ever
99°F
set in 1988
Coolest Sep 3 ever
48°F
set in 1912
Forecast high 57°F — 122nd warmest Sep 3 of 122 years · record 99°F (1988) · warmest since 2025.
Ranks
#118 / 122
warmest Sep 4 in 122 yrs of record
Warmest Sep 4 ever
100°F
set in 1988
Coolest Sep 4 ever
56°F
set in 1912
Forecast high 61°F — 118th warmest Sep 4 of 122 years · record 100°F (1988) · warmest since 2025.
Ranks
#108 / 122
warmest Sep 5 in 122 yrs of record
Warmest Sep 5 ever
98°F
set in 2017
Coolest Sep 5 ever
49°F
set in 2000
Forecast high 67°F — 108th warmest Sep 5 of 122 years · record 98°F (2017) · warmest since 2025.
Ranks
#107 / 122
warmest Sep 6 in 122 yrs of record
Warmest Sep 6 ever
99°F
set in 2022
Coolest Sep 6 ever
48°F
set in 1912
Forecast high 68°F — 107th warmest Sep 6 of 122 years · record 99°F (2022) · warmest since 2025.
Ranks
#107 / 121
warmest Sep 7 in 121 yrs of record
Warmest Sep 7 ever
98°F
set in 1902
Coolest Sep 7 ever
47°F
set in 1912
Forecast high 68°F — 107th warmest Sep 7 of 121 years · record 98°F (1902) · warmest since 2025.
The hottest and coldest ever recorded at Klamath Falls in each calendar month, and for the whole 1897–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
78°FJan 3, 1900
-19°FJan 5, 2017
Feb
69°FFeb 24, 1995
-14°FFeb 12, 2025
Mar
77°FMar 12, 1934
-5°FMar 1, 1917
Apr
87°FApr 27, 1987
10°FApr 16, 1963
May
98°FMay 30, 1986
17°FMay 6, 1968
Jun
103°FJun 28, 2021
23°FJun 4, 2001
Jul
103°FJul 22, 1905
22°FJul 3, 2000
Aug
104°FAug 7, 1972
28°FAug 30, 1908
Sep
103°FSep 9, 1902
20°FSep 24, 1973
Oct
92°FOct 3, 1905
8°FOct 31, 2002
Nov
74°FNov 1, 1965
-4°FNov 24, 2010
Dec
63°FDec 1, 1904
-20°FDec 8, 2013
All-time
104°FAug 7, 1972
-20°FDec 8, 2013
2026 Records So Far
Records set or tied at Klamath Falls so far this year — through Aug 28.
Record Highs in 2026
5 broke
plus 1 tied — daily record highs set this year
Monthly high record this year: Mar (77°F)
Record Lows in 2026
2 broke
plus 1 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
73°F
record high minimum — the night it never cooled · Aug 8, 1981
Coldest high ever
3°F
record low maximum — the day it never warmed · Dec 21, 1990
Month
Warmest low
Coldest high
Jan
47°FJan 21, 1981
7°FJan 3, 1912
Feb
46°FFeb 6, 1963
8°FFeb 4, 1989
Mar
49°FMar 20, 1997
25°FMar 2, 1917
Apr
52°FApr 29, 1981
32°FApr 11, 1911
May
66°FMay 29, 1986
39°FMay 8, 2022
Jun
72°FJun 23, 1992
42°FJun 1, 1898
Jul
71°FJul 21, 1994
52°FJul 5, 1909
Aug
73°FAug 8, 1981
55°FAug 15, 1976
Sep
63°FSep 2, 1950
43°FSep 29, 1971
Oct
56°FOct 3, 1917
29°FOct 30, 1935
Nov
49°FNov 4, 1958
21°FNov 26, 1985
Dec
46°FDec 21, 2014
3°FDec 21, 1990
All-time
73°FAug 8, 1981
3°FDec 21, 1990
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
34 days
record run, ended Jul 31 1906
So far in 2026
16 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Klamath Falls's own 1991–2020 record. Today's normal high: 82°F · forecast is -10° vs normal.
Klamath Falls'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 Klamath Falls's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.
Each cell is one day's high at Klamath Falls, coloured by temperature — 130 years of record, so heat waves read as warm streaks and cold snaps as blue.
Days Above the Mark
How many days a year hit a given high at Klamath Falls — counted through Sep 1 each year, so you can see whether 2026 is running hot. Pick a threshold:
16 days ≥90°F so far in 2026 — tied for the 70th most in 130 years. Normal for this point: 19. Record: 50 in 1906.
Share Card
A ready-to-share summary of Klamath Falls's outlook — post it, or link this page.