41.158°N, 104.808°W · station CYSthr · 155 years of record
87°F
HOTTEST SEP 4 SINCE 2024
forecast high · Sep 4
7-Day Forecast
NWS NDFD forecast high temperature for Cheyenne.
This Day in History
Every year's high on each of the next 7 forecast dates at Cheyenne — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#62 / 153
warmest Sep 1 in 153 yrs of record
Warmest Sep 1 ever
95°F
set in 1995
Coolest Sep 1 ever
53°F
set in 1974
Forecast high 81°F — 62nd warmest Sep 1 of 153 years · record 95°F (1995) · warmest since 2024.
Ranks
#42 / 153
warmest Sep 2 in 153 yrs of record
Warmest Sep 2 ever
95°F
set in 2019
Coolest Sep 2 ever
39°F
set in 1874
Forecast high 83°F — 42nd warmest Sep 2 of 153 years · record 95°F (2019) · warmest since 2023.
Ranks
#40 / 153
warmest Sep 3 in 153 yrs of record
Warmest Sep 3 ever
92°F
set in 2013
Coolest Sep 3 ever
49°F
set in 1874
Forecast high 84°F — 40th warmest Sep 3 of 153 years · record 92°F (2013) · warmest since 2024.
Ranks
#13 / 153
warmest Sep 4 in 153 yrs of record
Warmest Sep 4 ever
94°F
set in 2022
Coolest Sep 4 ever
51°F
set in 1968
Forecast high 87°F — 13th warmest Sep 4 of 153 years · record 94°F (2022) · warmest since 2024.
Ranks
#28 / 153
warmest Sep 5 in 153 yrs of record
Warmest Sep 5 ever
95°F
set in 2022
Coolest Sep 5 ever
48°F
set in 1885
Forecast high 85°F — 28th warmest Sep 5 of 153 years · record 95°F (2022) · warmest since 2022.
Ranks
#34 / 153
warmest Sep 6 in 153 yrs of record
Warmest Sep 6 ever
95°F
set in 2022
Coolest Sep 6 ever
36°F
set in 1929
Forecast high 84°F — 34th warmest Sep 6 of 153 years · record 95°F (2022) · warmest since 2023.
Ranks
#34 / 153
warmest Sep 7 in 153 yrs of record
Warmest Sep 7 ever
97°F
set in 2022
Coolest Sep 7 ever
38°F
set in 1929
Forecast high 84°F — 34th warmest Sep 7 of 153 years · record 97°F (2022) · warmest since 2023.
The hottest and coldest ever recorded at Cheyenne in each calendar month, and for the whole 1872–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
70°FJan 27, 2015
-38°FJan 9, 1875
Feb
71°FFeb 11, 1962
-34°FFeb 8, 1936
Mar
83°FMar 21, 2026
-21°FMar 2, 1943
Apr
84°FApr 30, 2020
-8°FApr 1, 1975
May
91°FMay 29, 2000
8°FMay 3, 1907
Jun
100°FJun 23, 1954
25°FJun 2, 1951
Jul
100°FJul 14, 1881
33°FJul 4, 1915
Aug
98°FAug 1, 2008
25°FAug 25, 1910
Sep
97°FSep 7, 2022
8°FSep 30, 1985
Oct
85°FOct 9, 1910
-5°FOct 26, 1878
Nov
75°FNov 5, 1891
-21°FNov 13, 1916
Dec
70°FDec 2, 2021
-28°FDec 9, 1919
All-time
100°FJul 14, 1881
-38°FJan 9, 1875
2026 Records So Far
Records set or tied at Cheyenne so far this year — through Aug 30.
Record Highs in 2026
10 broke
plus 2 tied — daily record highs set this year
Monthly high records this year: Mar (83°F), Aug (98°F)
Record Lows in 2026
0 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
68°F
record high minimum — the night it never cooled · Jul 31, 1960
Coldest high ever
-21°F
record low maximum — the day it never warmed · Jan 11, 1963
Month
Warmest low
Coldest high
Jan
46°FJan 19, 1920
-21°FJan 11, 1963
Feb
50°FFeb 4, 1890
-18°FFeb 3, 1989
Mar
51°FMar 16, 1908
-5°FMar 12, 1880
Apr
54°FApr 14, 2002
9°FApr 7, 1875
May
60°FMay 28, 1934
26°FMay 1, 1954
Jun
67°FJun 21, 2025
37°FJun 1, 1951
Jul
68°FJul 31, 1960
47°FJul 10, 1895
Aug
67°FAug 24, 2020
49°FAug 28, 1892
Sep
65°FSep 5, 2019
29°FSep 24, 1926
Oct
56°FOct 16, 1991
11°FOct 30, 1991
Nov
53°FNov 15, 2021
-4°FNov 27, 1919
Dec
47°FDec 12, 1921
-18°FDec 20, 1990
All-time
68°FJul 31, 1960
-21°FJan 11, 1963
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
10 days
record run, ended Jul 21 2003
So far in 2026
20 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Cheyenne's own 1991–2020 record. Today's normal high: 78°F · forecast is +9° vs normal.
Cheyenne'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 Cheyenne's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.