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Alaska · THREADEX · 1943–2026

Juneau, AK

58.354°N, 134.556°W · station JNUthr · 84 years of record
46°F
forecast low · Sep 2

7-Day Forecast

NWS NDFD forecast low temperature for Juneau.
46°WED9/246°THU9/346°FRI9/448°SAT9/550°SUN9/650°MON9/750°TUE9/8

This Day in History

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

Ranks

#40 / 83
coldest Sep 2 in 83 yrs of record

Coldest Sep 2 ever

30°F
set in 1981

Mildest Sep 2 ever

54°F
set in 2021
Forecast low 46°F — 40th coldest Sep 2 of 83 years · record 30°F (1981) · coldest since 2025.
1943: 47°F1944: 46°F1945: 45°F1946: 44°F1947: 43°F1948: 47°F1949: 52°F1950: 46°F1951: 43°F1952: 48°F1953: 45°F1954: 38°F1955: 47°F1956: 45°F1957: 36°F1958: 40°F1959: 42°F1960: 43°F1961: 45°F1962: 33°F1963: 53°F1964: 44°F1965: 42°F1966: 44°F1967: 50°F1968: 45°F1969: 45°F1970: 44°F1971: 48°F1972: 49°F1973: 47°F1974: 43°F1975: 49°F1976: 44°F1977: 44°F1978: 43°F1979: 47°F1980: 48°F1981: 30°F1982: 48°F1983: 52°F1984: 44°F1985: 51°F1986: 49°F1987: 50°F1988: 44°F1989: 52°F1990: 48°F1991: 43°F1992: 48°F1993: 50°F1994: 46°F1995: 49°F1996: 49°F1997: 52°F1998: 46°F1999: 51°F2000: 40°F2001: 47°F2002: 45°F2003: 52°F2004: 42°F2005: 47°F2006: 44°F2007: 43°F2008: 48°F2009: 40°F2010: 48°F2011: 42°F2012: 49°F2013: 51°F2014: 42°F2015: 37°F2016: 41°F2017: 41°F2018: 46°F2019: 51°F2020: 52°F2021: 54°F2022: 51°F2023: 50°F2024: 49°F2025: 43°F46° forecast30354045505519501960197019801990200020102020
📖 Juneau's full Climate Almanac →

The Numbers

Forecast low · Sep 246°F
Coldest this date since2025
This-date record30°F
This-date rank#40 of 83
Coldest at any time since2026
All-time record-22°F (1968)
Odds to tie/break0.0% (daily)
Period of record1943–2026

Record Book

The hottest and coldest ever recorded at Juneau in each calendar month, and for the whole 1943–2026 record — with the year each was set.
MonthRecord HighRecord Low
Jan57°FJan 6, 1958-22°FJan 12, 1972
Feb57°FFeb 27, 1992-22°FFeb 2, 1968
Mar61°FMar 21, 1998-15°FMar 7, 1972
Apr74°FApr 26, 20036°FApr 5, 1963
May82°FMay 27, 194725°FMay 2, 1956
Jun86°FJun 13, 196931°FJun 7, 1955
Jul90°FJul 7, 197536°FJul 8, 1950
Aug85°FAug 14, 202627°FAug 25, 1948
Sep74°FSep 3, 202523°FSep 24, 1972
Oct63°FOct 1, 201811°FOct 30, 1984
Nov56°FNov 2, 1949-5°FNov 21, 1966
Dec54°FDec 12, 1944-21°FDec 31, 1949
All-time90°FJul 7, 1975-22°FFeb 2, 1968

2026 Records So Far

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

Record Highs in 2026

2 broke
plus 1 tied — daily record highs set this year
Monthly high record this year: Aug (85°F)

Record Lows in 2026

3 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

60°F
record high minimum — the night it never cooled · Jul 6, 2018

Coldest high ever

-7°F
record low maximum — the day it never warmed · Feb 1, 1968
MonthWarmest lowColdest high
Jan46°FJan 23, 2014-4°FJan 30, 1947
Feb47°FFeb 26, 1992-7°FFeb 1, 1968
Mar44°FMar 29, 20162°FMar 2, 1955
Apr50°FApr 28, 200524°FApr 6, 1954
May54°FMay 31, 198338°FMay 4, 1945
Jun59°FJun 30, 201945°FJun 3, 1972
Jul60°FJul 6, 201848°FJul 7, 1970
Aug59°FAug 24, 202247°FAug 29, 1984
Sep56°FSep 13, 197941°FSep 27, 1972
Oct54°FOct 1, 198726°FOct 29, 1984
Nov47°FNov 2, 19895°FNov 26, 1985
Dec46°FDec 23, 1999-2°FDec 8, 1948
All-time60°FJul 6, 2018-7°FFeb 1, 1968

Cold Streaks

Current run

0 days
consecutive days with a low ≤ 32°F

Longest ever

114 days
record run, ended Mar 22 1969

So far in 2026

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

Climate Normals

Normal low & low by month, from Juneau's own 1991–2020 record. Today's normal low: 47°F · forecast is -1° vs normal.
Jan: 33°FJan: 24°FFeb: 36°FFeb: 25°FMar: 39°FMar: 27°FApr: 49°FApr: 33°FMay: 58°FMay: 41°FJun: 62°FJun: 47°FJul: 64°FJul: 50°FAug: 63°FAug: 49°FSep: 56°FSep: 44°FOct: 47°FOct: 37°FNov: 38°FNov: 29°FDec: 35°FDec: 26°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise4:57 AM
Sunset6:58 PM
Solar noon11:58 AM
Daylight14h 01m · losing 35 min/wk
Local standard time (no DST), level horizon.

Location

58.35°N, 134.56°WAlaska

Nearby Stations

Yakutat, AK199 mi WAnnette, AK255 mi SEGulkana, AK456 mi WDelta Junction, AK537 mi NWAnchorage, AK570 mi WTalkeetna, AK595 mi W

The Last 6 Weeks

Juneau'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.
Juneau, AK — last six weeks of daily low

2026 So Far

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

Every Day Since 1943

Each cell is one day's low at Juneau, coloured by temperature — 84 years of record, so heat waves read as warm streaks and cold snaps as blue.
Juneau, AK daily low heat map 1943–2026

Days Below the Mark

How many days a year hit a given low at Juneau — counted through Sep 2 each year, so you can see whether 2026 is running cold. Pick a threshold:
82 days ≤32°F so far in 2026 — tied for the 51st most in 84 years. Normal for this point: 84. Record: 121 in 1967.

Share Card

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