46.782°N, 100.757°W · station BISthr · 153 years of record
93°F
HOTTEST SEP 4 SINCE 2023
forecast high · Sep 4
7-Day Forecast
NWS NDFD forecast high temperature for Bismarck.
This Day in History
Every year's high on each of the next 7 forecast dates at Bismarck — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#68 / 151
warmest Sep 1 in 151 yrs of record
Warmest Sep 1 ever
103°F
set in 1983
Coolest Sep 1 ever
50°F
set in 1934
Forecast high 79°F — 68th warmest Sep 1 of 151 years · record 103°F (1983) · warmest since 2025.
Ranks
#47 / 151
warmest Sep 2 in 151 yrs of record
Warmest Sep 2 ever
100°F
set in 1971
Coolest Sep 2 ever
55°F
set in 1934
Forecast high 84°F — 47th warmest Sep 2 of 151 years · record 100°F (1971) · warmest since 2023.
Ranks
#23 / 151
warmest Sep 3 in 151 yrs of record
Warmest Sep 3 ever
102°F
set in 1976
Coolest Sep 3 ever
55°F
set in 1962
Forecast high 90°F — 23rd warmest Sep 3 of 151 years · record 102°F (1976) · warmest since 2023.
Ranks
#18 / 151
warmest Sep 4 in 151 yrs of record
Warmest Sep 4 ever
100°F
set in 1948
Coolest Sep 4 ever
55°F
set in 1999
Forecast high 93°F — 18th warmest Sep 4 of 151 years · record 100°F (1948) · warmest since 2023.
Ranks
#20 / 151
warmest Sep 5 in 151 yrs of record
Warmest Sep 5 ever
104°F
set in 1978
Coolest Sep 5 ever
49°F
set in 1956
Forecast high 90°F — 20th warmest Sep 5 of 151 years · record 104°F (1978) · warmest since 2022.
Ranks
#58 / 151
warmest Sep 6 in 151 yrs of record
Warmest Sep 6 ever
103°F
set in 1978
Coolest Sep 6 ever
49°F
set in 1911
Forecast high 81°F — 58th warmest Sep 6 of 151 years · record 103°F (1978) · warmest since 2022.
Ranks
#57 / 151
warmest Sep 7 in 151 yrs of record
Warmest Sep 7 ever
105°F
set in 1931
Coolest Sep 7 ever
46°F
set in 1911
Forecast high 79°F — 57th warmest Sep 7 of 151 years · record 105°F (1931) · warmest since 2022.
The hottest and coldest ever recorded at Bismarck in each calendar month, and for the whole 1874–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
63°FJan 8, 2002
-45°FJan 13, 1916
Feb
73°FFeb 27, 2016
-45°FFeb 16, 1936
Mar
81°FMar 22, 1910
-36°FMar 15, 1897
Apr
93°FApr 21, 1980
-12°FApr 1, 1975
May
102°FMay 28, 1934
13°FMay 3, 1907
Jun
111°FJun 29, 2002
30°FJun 2, 1969
Jul
114°FJul 6, 1936
32°FJul 6, 1884
Aug
109°FAug 5, 1941
32°FAug 31, 1895
Sep
105°FSep 7, 1931
10°FSep 30, 1876
Oct
95°FOct 1, 1953
-10°FOct 26, 1919
Nov
79°FNov 7, 1999
-30°FNov 29, 1985
Dec
66°FDec 6, 1939
-43°FDec 31, 1967
All-time
114°FJul 6, 1936
-45°FJan 13, 1916
2026 Records So Far
Records set or tied at Bismarck so far this year — through Aug 30.
Record Highs in 2026
5 broke
plus 5 tied — daily record highs set this year
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
83°F
record high minimum — the night it never cooled · Jul 11, 1936
Coldest high ever
-29°F
record low maximum — the day it never warmed · Jan 4, 1884
Month
Warmest low
Coldest high
Jan
35°FJan 3, 1927
-29°FJan 4, 1884
Feb
40°FFeb 27, 1932
-26°FFeb 1, 1996
Mar
49°FMar 31, 2012
-8°FMar 2, 1888
Apr
60°FApr 25, 1891
14°FApr 2, 1954
May
77°FMay 30, 1934
31°FMay 2, 1967
Jun
75°FJun 30, 1921
45°FJun 5, 1935
Jul
83°FJul 11, 1936
55°FJul 25, 1918
Aug
77°FAug 27, 1882
52°FAug 24, 1992
Sep
75°FSep 3, 1897
35°FSep 25, 1934
Oct
64°FOct 5, 2011
13°FOct 30, 1991
Nov
48°FNov 6, 1977
-9°FNov 28, 1896
Dec
38°FDec 4, 1888
-20°FDec 22, 1884
All-time
83°FJul 11, 1936
-29°FJan 4, 1884
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
18 days
record run, ended Jul 19 1936
So far in 2026
31 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Bismarck's own 1991–2020 record. Today's normal high: 79°F · forecast is +14° vs normal.
Bismarck'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 Bismarck's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.