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Idaho · THREADEX · 1895–2026

Challis, ID

44.523°N, 114.216°W · station LLJthr · 132 years of record
81°F
forecast high · Sep 1

7-Day Forecast

NWS NDFD forecast high temperature for Challis.
81°TUE9/174°WED9/272°THU9/373°FRI9/478°SAT9/576°SUN9/674°MON9/7

This Day in History

Every year's high on each of the next 7 forecast dates at Challis — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.

Ranks

#54 / 107
warmest Sep 1 in 107 yrs of record

Warmest Sep 1 ever

95°F
set in 2019

Coolest Sep 1 ever

56°F
set in 1973
Forecast high 81°F — 54th warmest Sep 1 of 107 years · record 95°F (2019) · warmest since 2025.
1899: 89°F1914: 88°F1915: 78°F1916: 87°F1917: 81°F1918: 81°F1919: 79°F1920: 71°F1921: 76°F1922: 75°F1923: 82°F1924: 74°F1925: 67°F1926: 64°F1927: 83°F1928: 89°F1929: 84°F1930: 74°F1931: 80°F1932: 66°F1933: 80°F1934: 82°F1935: 78°F1936: 78°F1937: 83°F1938: 82°F1939: 79°F1940: 90°F1941: 74°F1942: 82°F1943: 78°F1944: 89°F1945: 92°F1946: 74°F1947: 88°F1948: 86°F1949: 88°F1950: 92°F1951: 71°F1952: 70°F1953: 80°F1954: 87°F1955: 90°F1956: 78°F1957: 71°F1958: 85°F1959: 72°F1961: 69°F1962: 79°F1963: 63°F1965: 80°F1966: 76°F1967: 88°F1968: 82°F1969: 87°F1970: 84°F1971: 80°F1972: 82°F1973: 56°F1974: 68°F1975: 70°F1976: 86°F1977: 64°F1978: 84°F1979: 82°F1980: 65°F1981: 84°F1982: 80°F1983: 87°F1984: 70°F1985: 62°F1986: 68°F1987: 89°F1989: 80°F1990: 85°F1991: 88°F1992: 80°F1993: 78°F1994: 82°F1995: 93°F1999: 69°F2000: 77°F2001: 88°F2002: 83°F2003: 86°F2004: 88°F2005: 82°F2006: 76°F2007: 87°F2008: 80°F2009: 80°F2010: 71°F2011: 73°F2012: 86°F2013: 87°F2014: 76°F2015: 87°F2016: 85°F2017: 89°F2018: 83°F2019: 95°F2020: 58°F2021: 81°F2022: 93°F2023: 85°F2024: 91°F2025: 88°F81° forecast5560657075808590951920193019401950197019801990200020102020
📖 Challis's full Climate Almanac →

The Numbers

Forecast high · Sep 181°F
Hottest this date since2025
This-date record95°F
This-date rank#54 of 107
Hottest at any time since2026
All-time record103°F (1961)
Odds to tie/break0.0% (daily)
Period of record1895–2026

Record Book

The hottest and coldest ever recorded at Challis in each calendar month, and for the whole 1895–2026 record — with the year each was set.
MonthRecord HighRecord Low
Jan60°FJan 1, 1898-33°FJan 25, 1949
Feb65°FFeb 26, 1950-31°FFeb 9, 1933
Mar75°FMar 19, 2026-16°FMar 1, 1922
Apr87°FApr 16, 19153°FApr 1, 1936
May96°FMay 28, 200315°FMay 5, 1915
Jun100°FJun 23, 199224°FJun 1, 1920
Jul103°FJul 26, 196431°FJul 2, 1955
Aug103°FAug 4, 196120°FAug 30, 1927
Sep99°FSep 3, 202217°FSep 24, 1926
Oct89°FOct 14, 1927-4°FOct 31, 2002
Nov75°FNov 1, 1937-17°FNov 24, 1985
Dec63°FDec 2, 2021-34°FDec 23, 1983
All-time103°FAug 4, 1961-34°FDec 23, 1983

2026 Records So Far

Records set or tied at Challis so far this year — through Aug 30.

Record Highs in 2026

4 broke
plus 4 tied — daily record highs set this year
Monthly high record this year: Mar (75°F)

Record Lows in 2026

0 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

75°F
record high minimum — the night it never cooled · Aug 9, 1928

Coldest high ever

-14°F
record low maximum — the day it never warmed · Dec 22, 1983
MonthWarmest lowColdest high
Jan40°FJan 17, 1896-11°FJan 22, 1930
Feb41°FFeb 7, 1996-6°FFeb 9, 1933
Mar46°FMar 25, 202611°FMar 1, 1960
Apr56°FApr 30, 199229°FApr 4, 1918
May58°FMay 28, 198639°FMay 6, 2010
Jun65°FJun 6, 192645°FJun 7, 1924
Jul70°FJul 23, 200658°FJul 5, 1982
Aug75°FAug 9, 192858°FAug 20, 1968
Sep61°FSep 4, 194538°FSep 25, 1934
Oct55°FOct 9, 195514°FOct 31, 2002
Nov53°FNov 7, 20064°FNov 25, 1985
Dec43°FDec 18, 1917-14°FDec 22, 1983
All-time75°FAug 9, 1928-14°FDec 22, 1983

Hot Streaks

Current run

0 days
consecutive days with a high ≥ 90°F

Longest ever

29 days
record run, ended Aug 2 2018

So far in 2026

35 days
days with a high ≥ 90°F this year

Climate Normals

Normal high & low by month, from Challis's own 1991–2020 record. Today's normal high: 81°F · forecast is +0° vs normal.
Jan: 30°FJan: 10°FFeb: 37°FFeb: 16°FMar: 50°FMar: 25°FApr: 58°FApr: 30°FMay: 67°FMay: 39°FJun: 77°FJun: 45°FJul: 88°FJul: 51°FAug: 86°FAug: 49°FSep: 75°FSep: 41°FOct: 59°FOct: 31°FNov: 42°FNov: 20°FDec: 30°FDec: 10°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise4:59 AM
Sunset6:14 PM
Solar noon11:36 AM
Daylight13h 14m · losing 21 min/wk
Local standard time (no DST), level horizon.

Location

44.52°N, 114.22°W

Nearby Stations

Stanley, ID42 mi SWMcCall, ID95 mi WBoise, ID120 mi SWJerome, ID124 mi SPocatello, ID137 mi SEBurley, ID138 mi S

The Last 6 Weeks

Challis'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.
Challis, ID — last six weeks of daily high

2026 So Far

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

Every Day Since 1895

Each cell is one day's high at Challis, coloured by temperature — 132 years of record, so heat waves read as warm streaks and cold snaps as blue.
Challis, ID daily high heat map 1895–2026

Days Above the Mark

How many days a year hit a given high at Challis — counted through Sep 1 each year, so you can see whether 2026 is running hot. Pick a threshold:
35 days ≥90°F so far in 2026 — the 11th most in 132 years. Normal for this point: 17. Record: 46 in 2021.

Share Card

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