37.439°N, 105.862°W · station ALSthr · 121 years of record
85°F
HOTTEST SEP 3 SINCE 2023
forecast high · Sep 3
7-Day Forecast
NWS NDFD forecast high temperature for Alamosa.
This Day in History
Every year's high on each of the next 7 forecast dates at Alamosa — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#31 / 95
warmest Sep 1 in 95 yrs of record
Warmest Sep 1 ever
87°F
set in 2019
Coolest Sep 1 ever
64°F
set in 1967
Forecast high 82°F — 31st warmest Sep 1 of 95 years · record 87°F (2019) · warmest since 2024.
Ranks
#14 / 95
warmest Sep 2 in 95 yrs of record
Warmest Sep 2 ever
86°F
set in 1948
Coolest Sep 2 ever
71°F
set in 1907
Forecast high 84°F — 14th warmest Sep 2 of 95 years · record 86°F (1948) · warmest since 2023.
Ranks
#7 / 95
warmest Sep 3 in 95 yrs of record
Warmest Sep 3 ever
88°F
set in 2019
Coolest Sep 3 ever
50°F
set in 1961
Forecast high 85°F — 7th warmest Sep 3 of 95 years · record 88°F (2019) · warmest since 2023.
Ranks
#16 / 95
warmest Sep 4 in 95 yrs of record
Warmest Sep 4 ever
87°F
set in 1907
Coolest Sep 4 ever
53°F
set in 1961
Forecast high 83°F — 16th warmest Sep 4 of 95 years · record 87°F (1907) · warmest since 2024.
Ranks
#16 / 95
warmest Sep 5 in 95 yrs of record
Warmest Sep 5 ever
89°F
set in 2022
Coolest Sep 5 ever
66°F
set in 1968
Forecast high 84°F — 16th warmest Sep 5 of 95 years · record 89°F (2022) · warmest since 2024.
Ranks
#15 / 95
warmest Sep 6 in 95 yrs of record
Warmest Sep 6 ever
89°F
set in 2020
Coolest Sep 6 ever
64°F
set in 1970
Forecast high 84°F — 15th warmest Sep 6 of 95 years · record 89°F (2020) · warmest since 2023.
Ranks
#14 / 95
warmest Sep 7 in 95 yrs of record
Warmest Sep 7 ever
89°F
set in 2020
Coolest Sep 7 ever
62°F
set in 1962
Forecast high 83°F — 14th warmest Sep 7 of 95 years · record 89°F (2020) · warmest since 2023.
The hottest and coldest ever recorded at Alamosa in each calendar month, and for the whole 1906–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
63°FJan 31, 2018
-50°FJan 28, 1948
Feb
67°FFeb 3, 2025
-35°FFeb 13, 1948
Mar
83°FMar 21, 2026
-20°FMar 4, 1964
Apr
80°FApr 20, 1989
-6°FApr 8, 1973
May
90°FMay 31, 2002
11°FMay 1, 1967
Jun
95°FJun 26, 1994
23°FJun 3, 1936
Jul
96°FJul 5, 1989
28°FJul 1, 2020
Aug
93°FAug 4, 2026
29°FAug 21, 1964
Sep
89°FSep 5, 2020
15°FSep 30, 1985
Oct
81°FOct 7, 1979
-9°FOct 31, 1991
Nov
71°FNov 9, 1980
-30°FNov 27, 1952
Dec
63°FDec 30, 2017
-42°FDec 14, 1964
All-time
96°FJul 5, 1989
-50°FJan 28, 1948
2026 Records So Far
Records set or tied at Alamosa so far this year — through Aug 30.
Record Highs in 2026
25 broke
plus 14 tied — daily record highs set this year
Monthly high records this year: Mar (83°F), Aug (93°F)
Record Lows in 2026
1 broke
plus 2 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 15, 1934
Coldest high ever
0°F
record low maximum — the day it never warmed · Dec 7, 1964
Month
Warmest low
Coldest high
Jan
35°FJan 31, 1963
2°FJan 3, 1992
Feb
40°FFeb 20, 1907
5°FFeb 2, 2011
Mar
41°FMar 28, 1963
18°FMar 3, 1965
Apr
43°FApr 26, 1943
23°FApr 4, 1983
May
52°FMay 9, 1963
34°FMay 1, 2011
Jun
58°FJun 30, 2024
50°FJun 10, 1975
Jul
60°FJul 15, 1934
63°FJul 21, 1961
Aug
59°FAug 12, 1907
51°FAug 24, 1992
Sep
54°FSep 21, 2022
40°FSep 27, 1936
Oct
49°FOct 2, 2018
23°FOct 31, 1991
Nov
39°FNov 3, 1932
12°FNov 28, 1976
Dec
40°FDec 6, 1966
0°FDec 7, 1964
All-time
60°FJul 15, 1934
0°FDec 7, 1964
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
13 days
record run, ended Jul 19 2003
So far in 2026
24 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Alamosa's own 1991–2020 record. Today's normal high: 78°F · forecast is +7° vs normal.
Alamosa'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 Alamosa's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.