35.334°N, 94.365°W · station FSMthr · 145 years of record
75°F
COLDEST SEP 7 SINCE 2025
forecast low · Sep 7
7-Day Forecast
NWS NDFD forecast low temperature for Fort Smith.
This Day in History
Every year's low on each of the next 7 forecast dates at Fort Smith — toggle a day below. The forecast line shows where it lands; the ringed bar is the coldest on record.
Ranks
#139 / 144
coldest Sep 2 in 144 yrs of record
Coldest Sep 2 ever
51°F
set in 1882
Mildest Sep 2 ever
80°F
set in 1936
Forecast low 76°F — 139th coldest Sep 2 of 144 years · record 51°F (1882) · coldest since 2025.
Ranks
#142 / 144
coldest Sep 3 in 144 yrs of record
Coldest Sep 3 ever
52°F
set in 1974
Mildest Sep 3 ever
81°F
set in 1936
Forecast low 76°F — 142nd coldest Sep 3 of 144 years · record 52°F (1974) · coldest since 2025.
Ranks
#136 / 144
coldest Sep 4 in 144 yrs of record
Coldest Sep 4 ever
48°F
set in 1891
Mildest Sep 4 ever
81°F
set in 1939
Forecast low 76°F — 136th coldest Sep 4 of 144 years · record 48°F (1891) · coldest since 2025.
Ranks
#140 / 144
coldest Sep 5 in 144 yrs of record
Coldest Sep 5 ever
51°F
set in 1953
Mildest Sep 5 ever
78°F
set in 1936
Forecast low 76°F — 140th coldest Sep 5 of 144 years · record 51°F (1953) · coldest since 2025.
Ranks
#141 / 144
coldest Sep 6 in 144 yrs of record
Coldest Sep 6 ever
47°F
set in 1974
Mildest Sep 6 ever
78°F
set in 1922
Forecast low 76°F — 141st coldest Sep 6 of 144 years · record 47°F (1974) · coldest since 2025.
Ranks
#137 / 144
coldest Sep 7 in 144 yrs of record
Coldest Sep 7 ever
51°F
set in 2011
Mildest Sep 7 ever
79°F
set in 1936
Forecast low 75°F — 137th coldest Sep 7 of 144 years · record 51°F (2011) · coldest since 2025.
The hottest and coldest ever recorded at Fort Smith in each calendar month, and for the whole 1882–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
81°FJan 19, 1952
-11°FJan 12, 1918
Feb
88°FFeb 23, 2017
-15°FFeb 12, 1899
Mar
95°FMar 22, 2026
7°FMar 11, 1948
Apr
96°FApr 18, 2006
22°FApr 3, 1975
May
99°FMay 31, 1934
34°FMay 1, 1903
Jun
106°FJun 20, 1936
47°FJun 3, 1964
Jul
111°FJul 13, 1954
50°FJul 6, 1972
Aug
115°FAug 3, 2011
45°FAug 24, 1891
Sep
109°FSep 4, 1998
33°FSep 29, 1967
Oct
96°FOct 1, 1938
22°FOct 30, 1917
Nov
89°FNov 18, 2025
8°FNov 29, 1976
Dec
84°FDec 27, 2025
-5°FDec 23, 1989
All-time
115°FAug 3, 2011
-15°FFeb 12, 1899
2026 Records So Far
Records set or tied at Fort Smith so far this year — through Aug 30.
Record Highs in 2026
10 broke
plus 1 tied — daily record highs set this year
Monthly high record this year: Mar (95°F)
Record Lows in 2026
1 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
85°F
record high minimum — the night it never cooled · Aug 2, 1934
Coldest high ever
3°F
record low maximum — the day it never warmed · Jan 8, 1886
Month
Warmest low
Coldest high
Jan
67°FJan 7, 2008
3°FJan 8, 1886
Feb
68°FFeb 24, 1930
6°FFeb 7, 1895
Mar
71°FMar 19, 1907
25°FMar 11, 1948
Apr
72°FApr 5, 1888
42°FApr 4, 1886
May
76°FMay 20, 1902
49°FMay 2, 1994
Jun
84°FJun 27, 2011
58°FJun 1, 1903
Jul
83°FJul 16, 1939
68°FJul 16, 1967
Aug
85°FAug 2, 1934
68°FAug 25, 1887
Sep
82°FSep 1, 1922
57°FSep 26, 1984
Oct
75°FOct 1, 1911
37°FOct 29, 1925
Nov
70°FNov 6, 1924
29°FNov 28, 1976
Dec
70°FDec 7, 1966
8°FDec 24, 1983
All-time
85°FAug 2, 1934
3°FJan 8, 1886
Cold Streaks
Current run
0 days
consecutive days with a low ≤ 32°F
Longest ever
53 days
record run, ended Feb 10 1977
So far in 2026
32 days
days with a low ≤ 32°F this year
Climate Normals
Normal low & low by month, from Fort Smith's own 1991–2020 record. Today's normal low: 67°F · forecast is +8° vs normal.
Fort Smith'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.
2026 So Far
Every day this year against Fort Smith's own record — the record low, the normal, and the full span ever seen. A shareable look at where the year stands.