California · THREADEX · 1935–2026

Alturas, CA

41.484°N, 120.561°W · station AATthr · 92 years of record
50°F
forecast low · Jul 17

7-Day Forecast

NWS NDFD forecast low temperature for Alturas.
56°TUE7/1452°WED7/1551°THU7/1650°FRI7/1752°SAT7/1854°SUN7/19

This Day in History · Jul 17

Today ranks

#73 / 90
coldest Jul 17 in 90 yrs of record

Coldest Jul 17 ever

31°F
set in 1993

Mildest Jul 17 ever

68°F
set in 2014

Coldest Jul 17 — Year by Year

Every year's low on Jul 17 at Alturas. The forecast line shows where today lands; the ringed bar is the coldest on record.
3150681935: 46°F1937: 43°F1938: 47°F1939: 37°F1940: 42°F1941: 44°F1942: 48°F1943: 37°F1944: 45°F1945: 42°F1946: 41°F1947: 40°F1948: 45°F1949: 42°F1950: 50°F1951: 41°F1952: 49°F1953: 51°F1954: 39°F1955: 34°F1956: 41°F1957: 43°F1958: 52°F1959: 50°F1960: 43°F1961: 38°F1962: 41°F1963: 49°F1964: 41°F1965: 46°F1966: 39°F1967: 43°F1968: 40°F1969: 41°F1970: 42°F1971: 50°F1972: 50°F1973: 47°F1974: 38°F1975: 47°F1976: 52°F1977: 45°F1978: 39°F1979: 43°F1980: 46°F1981: 43°F1982: 43°F1983: 33°F1984: 55°F1985: 45°F1986: 32°F1987: 35°F1988: 44°F1989: 45°F1990: 56°F1991: 46°F1992: 49°F1993: 31°F1994: 55°F1995: 51°F1996: 50°F1997: 45°F1998: 50°F1999: 42°F2000: 47°F2001: 50°F2002: 43°F2003: 41°F2004: 41°F2005: 49°F2006: 49°F2007: 40°F2008: 49°F2009: 42°F2010: 51°F2011: 37°F2012: 46°F2013: 37°F2014: 68°F2015: 48°F2016: 46°F2017: 46°F2018: 49°F2019: 49°F2020: 46°F2021: 45°F2022: 43°F2023: 61°F2024: 53°F2025: 48°F50° forecast193519932025

The Numbers

Forecast low · Jul 1750°F
Coldest this date since2025
This-date record31°F
This-date rank#73 of 90
Coldest at any time since2026
All-time record-34°F (1972)
Odds to tie/break0.0% (daily)
Period of record1935–2026

Record Book

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.
MonthRecord HighRecord Low
Jan69°F1961-32°F1937
Feb72°F1986-33°F1989
Mar82°F1966-7°F1971
Apr85°F19877°F1997
May95°F198314°F2010
Jun105°F202121°F1973
Jul107°F196028°F1976
Aug106°F196126°F1960
Sep106°F195515°F1950
Oct93°F19610°F2002
Nov82°F1962-17°F1985
Dec71°F1939-34°F1972
All-time107°F1960-34°F1972

2026 Records So Far

Records set or tied at Alturas so far this year — through Jul 11.

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

Cold Streaks

Current run

0 days
consecutive days with a low ≤ 32°F

Longest ever

105 days
record run, ended Mar 17 2008

So far in 2026

100 days
days with a low ≤ 32°F this year

Climate Normals

Normal low & low by month, from Alturas's own 1991–2020 record. Today's normal low: 46°F · forecast is +4° vs normal.
Jan: 44°FJan: 20°FFeb: 47°FFeb: 22°FMar: 53°FMar: 25°FApr: 59°FApr: 29°FMay: 68°FMay: 36°FJun: 78°FJun: 41°FJul: 89°FJul: 46°FAug: 88°FAug: 43°FSep: 80°FSep: 36°FOct: 66°FOct: 28°FNov: 51°FNov: 24°FDec: 42°FDec: 19°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise4:40 AM
Sunset7:36 PM
Solar noon12:08 PM
Daylight14h 56m · losing 8 min/wk
Local standard time (no DST), level horizon.

Location

41.48°N, 120.56°W

Nearby Stations

Klamath Falls, OR75 mi NWMount Shasta, CA91 mi WRedding, CA112 mi SWMedford, OR134 mi WReno, NV142 mi SWinnemucca, NV148 mi E

The Last 6 Weeks

Alturas's observed daily low for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.
Alturas, CA — last six weeks of daily low

2026 So Far

Every day this year against Alturas's own record — the record low, the normal, and the full span ever seen. A shareable look at where the year stands.
Alturas, CA — 2026 daily low trace
Download year chart

Every Day Since 1935

Each cell is one day's low at Alturas, coloured by temperature — 92 years of record, so heat waves read as warm streaks and cold snaps as blue.
Alturas, CA daily low heat map 1935–2026

Days Below the Mark

How many days a year hit a given low at Alturas — counted through Jul 17 each year, so you can see whether 2026 is running cold. Pick a threshold:
100 days ≤32°F so far in 2026 — tied for the 82nd most in 92 years. Normal for this point: 112. Record: 139 in 1975.

Share Card

A ready-to-share summary of Alturas's outlook — post it, or link this page.
Alturas, CA cold share card
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