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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Alamo Threshold Days by Year (USC00260099)

17 fixed thresholds counted per year at Alamo (USC00260099): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alamo Thresholds

  • Alamo: nights with a minimum temperature at or below 0 C (32 F) in 30 years, most in 1928 with 181.
  • Alamo: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1952 with 162.
  • Alamo: days with a maximum temperature at or above 35 C (95 F) in 29 years, most in 1942 with 99.
  • Alamo: days with a maximum temperature at or above 40 C (104 F) in 29 years, most in 1940 with 46.
  • 17 fixed thresholds have at least one qualifying day at Alamo.
29 years with a qualifying day
Days at or above 30 C (86 F) per year at Alamo Days per year at Alamo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 162 in 1952. 0501001502001922: 1281923: 921925: 1191926: 1371927: 1231928: 1061929: 921930: 1161931: 1141932: 1341933: 1251934: 1581935: 1291936: 1431937: 1481938: 1331939: 1051940: 1201941: 1071942: 1281945: 991948: 1191949: 1301950: 1461951: 1311952: 1621953: 1351957: 1151958: 1321922192619291932193519381941194819511957
Days per year at Alamo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 162 in 1952.
Days at or above 30 C (86 F) per year at Alamo
YearDaysDecade average
1922128113.9
192392113.9
1925119113.9
1926137113.9
1927123113.9
1928106113.9
192992113.9
1930116130.5
1931114130.5
1932134130.5
1933125130.5
1934158130.5
1935129130.5
1936143130.5
1937148130.5
1938133130.5
1939105130.5
1940120117.2
1941107117.2
1942128117.2
194599117.2
1948119117.2
1949130117.2
1950146136.8
1951131136.8
1952162136.8
1953135136.8
1957115136.8
1958132136.8
First to last qualifying date each year at Alamo For each year, a bar from the first to the last day at Alamo meeting 30 C (86 F). 1922: 5 May 1922 to 3 October 19221923: 4 May 1923 to 9 September 19231925: 13 April 1925 to 24 September 19251926: 24 April 1926 to 27 October 19261927: 24 April 1927 to 22 October 19271928: 28 April 1928 to 28 October 19281929: 24 May 1929 to 13 October 19291930: 6 April 1930 to 20 September 19301931: 17 April 1931 to 28 September 19311932: 9 May 1932 to 28 October 19321933: 20 May 1933 to 5 October 19331934: 8 April 1934 to 16 October 19341935: 22 May 1935 to 8 October 19351936: 10 April 1936 to 14 October 19361937: 3 May 1937 to 29 October 19371938: 18 April 1938 to 30 September 19381939: 7 April 1939 to 21 September 19391940: 10 May 1940 to 14 November 19401941: 5 May 1941 to 17 October 19411942: 7 May 1942 to 22 October 19421945: 16 April 1945 to 19 September 19451948: 16 April 1948 to 10 October 19481949: 22 April 1949 to 15 October 19491950: 2 April 1950 to 22 October 19501951: 9 April 1951 to 11 October 19511952: 18 April 1952 to 27 October 19521953: 21 April 1953 to 9 October 19531957: 3 May 1957 to 30 September 19571958: 17 April 1958 to 21 October 195819221927193119351939194519511958JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alamo meeting 30 C (86 F).
First to last qualifying date each year at Alamo
YearFirst dateLast date
19221922-05-051922-10-03
19231923-05-041923-09-09
19251925-04-131925-09-24
19261926-04-241926-10-27
19271927-04-241927-10-22
19281928-04-281928-10-28
19291929-05-241929-10-13
19301930-04-061930-09-20
19311931-04-171931-09-28
19321932-05-091932-10-28
19331933-05-201933-10-05
19341934-04-081934-10-16
19351935-05-221935-10-08
19361936-04-101936-10-14
19371937-05-031937-10-29
19381938-04-181938-09-30
19391939-04-071939-09-21
19401940-05-101940-11-14
19411941-05-051941-10-17
19421942-05-071942-10-22
19451945-04-161945-09-19
19481948-04-161948-10-10
19491949-04-221949-10-15
19501950-04-021950-10-22
19511951-04-091951-10-11
19521952-04-181952-10-27
19531953-04-211953-10-09
19571957-05-031957-09-30
19581958-04-171958-10-21

Every Fixed Threshold

Fixed thresholds at Alamo
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days291621952132
35 C (95 F): Days2999194273
40 C (104 F): Days2946194016
45 C (113 F): Days2419402
90 F (32.2 C): Days291351952106
100 F (37.8 C): Days2966194041
110 F (43.3 C): Days111019407
0 C (32 F): Ice days (max1218193718
0 C (32 F): Frost days (min301811928153
-10 C (14 F): Days with min283919494
-20 C (-4 F): Days with min3919379
20 C (68 F): Tropical nights (min242519342
25 C (77 F): Days with min4219452
10 mm (0.39 in): Days with 10 mm or more rain281219224
25 mm (0.98 in): Days with 25 mm or more rain11319381
50 mm (1.97 in): Days with 50 mm or more rain2219321
10 cm (3.9 in): Days with 10 cm or more snowfall4319492

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.

Download the Data

  • Data for Alamo threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).