41.484°N, 120.561°W · station AATthr · 92 years of record
76°F
HOTTEST SEP 1 SINCE 2025
forecast high · Sep 1
7-Day Forecast
NWS NDFD forecast high temperature for Alturas.
This Day in History
Every year's high on each of the next 7 forecast dates at Alturas — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#76 / 89
warmest Sep 1 in 89 yrs of record
Warmest Sep 1 ever
98°F
set in 1955
Coolest Sep 1 ever
65°F
set in 2008
Forecast high 76°F — 76th warmest Sep 1 of 89 years · record 98°F (1955) · warmest since 2025.
Ranks
#87 / 90
warmest Sep 2 in 90 yrs of record
Warmest Sep 2 ever
103°F
set in 1955
Coolest Sep 2 ever
54°F
set in 1964
Forecast high 61°F — 87th warmest Sep 2 of 90 years · record 103°F (1955) · warmest since 2025.
Ranks
#90 / 89
warmest Sep 3 in 89 yrs of record
Warmest Sep 3 ever
105°F
set in 1955
Coolest Sep 3 ever
57°F
set in 1964
Forecast high 57°F — 90th warmest Sep 3 of 89 years · record 105°F (1955) · warmest since 2025.
Ranks
#88 / 90
warmest Sep 4 in 90 yrs of record
Warmest Sep 4 ever
106°F
set in 1955
Coolest Sep 4 ever
58°F
set in 2000
Forecast high 65°F — 88th warmest Sep 4 of 90 years · record 106°F (1955) · warmest since 2025.
Ranks
#85 / 90
warmest Sep 5 in 90 yrs of record
Warmest Sep 5 ever
104°F
set in 1955
Coolest Sep 5 ever
63°F
set in 1940
Forecast high 70°F — 85th warmest Sep 5 of 90 years · record 104°F (1955) · warmest since 2025.
Ranks
#78 / 89
warmest Sep 6 in 89 yrs of record
Warmest Sep 6 ever
104°F
set in 1955
Coolest Sep 6 ever
60°F
set in 2000
Forecast high 72°F — 78th warmest Sep 6 of 89 years · record 104°F (1955) · warmest since 2025.
Ranks
#85 / 91
warmest Sep 7 in 91 yrs of record
Warmest Sep 7 ever
99°F
set in 2022
Coolest Sep 7 ever
62°F
set in 1985
Forecast high 71°F — 85th warmest Sep 7 of 91 years · record 99°F (2022) · warmest since 2025.
The hottest and coldest ever recorded at Alturas in each calendar month, and for the whole 1935–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
69°FJan 21, 1961
-32°FJan 20, 1937
Feb
72°FFeb 28, 1986
-33°FFeb 5, 1989
Mar
82°FMar 30, 1966
-7°FMar 1, 1971
Apr
85°FApr 28, 1987
7°FApr 5, 1997
May
95°FMay 29, 1983
14°FMay 6, 2010
Jun
105°FJun 28, 2021
21°FJun 18, 1973
Jul
107°FJul 19, 1960
28°FJul 1, 1976
Aug
106°FAug 4, 1961
26°FAug 23, 1960
Sep
106°FSep 4, 1955
15°FSep 30, 1950
Oct
93°FOct 15, 1961
0°FOct 31, 2002
Nov
82°FNov 1, 1962
-17°FNov 12, 1985
Dec
71°FDec 4, 1939
-34°FDec 9, 1972
All-time
107°FJul 19, 1960
-34°FDec 9, 1972
2026 Records So Far
Records set or tied at Alturas so far this year — through Aug 26.
Record Highs in 2026
6 broke
plus 2 tied — daily record highs set this year
Monthly high record this year: Mar (82°F)
Record Lows in 2026
1 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
68°F
record high minimum — the night it never cooled · Jul 17, 2014
Coldest high ever
-1°F
record low maximum — the day it never warmed · Dec 22, 1990
Month
Warmest low
Coldest high
Jan
48°FJan 1, 1997
0°FJan 7, 1937
Feb
44°FFeb 4, 1963
9°FFeb 6, 1989
Mar
45°FMar 13, 2003
25°FMar 3, 1976
Apr
55°FApr 29, 1939
32°FApr 1, 1982
May
57°FMay 31, 1986
34°FMay 3, 1964
Jun
66°FJun 25, 2026
40°FJun 1, 1971
Jul
68°FJul 17, 2014
55°FJul 3, 1978
Aug
65°FAug 15, 1992
53°FAug 20, 1968
Sep
62°FSep 5, 1998
42°FSep 27, 1986
Oct
56°FOct 24, 1977
30°FOct 29, 1971
Nov
48°FNov 3, 1941
22°FNov 24, 2010
Dec
45°FDec 22, 1955
-1°FDec 22, 1990
All-time
68°FJul 17, 2014
-1°FDec 22, 1990
Hot Streaks
Current run
1 days
consecutive days with a high ≥ 90°F
Longest ever
32 days
record run, ended Aug 15 1971
So far in 2026
40 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Alturas's own 1991–2020 record. Today's normal high: 85°F · forecast is -9° vs normal.
Alturas'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 Alturas's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.