58.354°N, 134.556°W · station JNUthr · 84 years of record
46°F
COLDEST SEP 2 SINCE 2025
forecast low · Sep 2
7-Day Forecast
NWS NDFD forecast low temperature for Juneau.
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.
Ranks
#36 / 83
coldest Sep 3 in 83 yrs of record
Coldest Sep 3 ever
36°F
set in 1964
Mildest Sep 3 ever
53°F
set in 1963
Forecast low 46°F — 36th coldest Sep 3 of 83 years · record 36°F (1964) · coldest since 2018.
Ranks
#40 / 83
coldest Sep 4 in 83 yrs of record
Coldest Sep 4 ever
35°F
set in 2002
Mildest Sep 4 ever
53°F
set in 2013
Forecast low 46°F — 40th coldest Sep 4 of 83 years · record 35°F (2002) · coldest since 2023.
Ranks
#57 / 83
coldest Sep 5 in 83 yrs of record
Coldest Sep 5 ever
35°F
set in 1979
Mildest Sep 5 ever
54°F
set in 2014
Forecast low 48°F — 57th coldest Sep 5 of 83 years · record 35°F (1979) · coldest since 2025.
Ranks
#63 / 83
coldest Sep 6 in 83 yrs of record
Coldest Sep 6 ever
33°F
set in 1947
Mildest Sep 6 ever
53°F
set in 1963
Forecast low 50°F — 63rd coldest Sep 6 of 83 years · record 33°F (1947) · coldest since 2023.
Ranks
#65 / 83
coldest Sep 7 in 83 yrs of record
Coldest Sep 7 ever
32°F
set in 1955
Mildest Sep 7 ever
56°F
set in 2013
Forecast low 50°F — 65th coldest Sep 7 of 83 years · record 32°F (1955) · coldest since 2022.
Ranks
#66 / 83
coldest Sep 8 in 83 yrs of record
Coldest Sep 8 ever
32°F
set in 1966
Mildest Sep 8 ever
55°F
set in 1995
Forecast low 50°F — 66th coldest Sep 8 of 83 years · record 32°F (1966) · coldest since 2024.
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.
Month
Record High
Record Low
Jan
57°FJan 6, 1958
-22°FJan 12, 1972
Feb
57°FFeb 27, 1992
-22°FFeb 2, 1968
Mar
61°FMar 21, 1998
-15°FMar 7, 1972
Apr
74°FApr 26, 2003
6°FApr 5, 1963
May
82°FMay 27, 1947
25°FMay 2, 1956
Jun
86°FJun 13, 1969
31°FJun 7, 1955
Jul
90°FJul 7, 1975
36°FJul 8, 1950
Aug
85°FAug 14, 2026
27°FAug 25, 1948
Sep
74°FSep 3, 2025
23°FSep 24, 1972
Oct
63°FOct 1, 2018
11°FOct 30, 1984
Nov
56°FNov 2, 1949
-5°FNov 21, 1966
Dec
54°FDec 12, 1944
-21°FDec 31, 1949
All-time
90°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
Month
Warmest low
Coldest high
Jan
46°FJan 23, 2014
-4°FJan 30, 1947
Feb
47°FFeb 26, 1992
-7°FFeb 1, 1968
Mar
44°FMar 29, 2016
2°FMar 2, 1955
Apr
50°FApr 28, 2005
24°FApr 6, 1954
May
54°FMay 31, 1983
38°FMay 4, 1945
Jun
59°FJun 30, 2019
45°FJun 3, 1972
Jul
60°FJul 6, 2018
48°FJul 7, 1970
Aug
59°FAug 24, 2022
47°FAug 29, 1984
Sep
56°FSep 13, 1979
41°FSep 27, 1972
Oct
54°FOct 1, 1987
26°FOct 29, 1984
Nov
47°FNov 2, 1989
5°FNov 26, 1985
Dec
46°FDec 23, 1999
-2°FDec 8, 1948
All-time
60°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.