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

Alamo Rs Threshold Days by Year (USC00020098)

3 fixed thresholds counted per year at Alamo Rs (USC00020098): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alamo Rs Thresholds

  • Alamo Rs: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1916 with 23.
  • Alamo Rs: days with 25 mm (0.98 in) or more of precipitation in 15 years, most in 1916 with 8.
  • Alamo Rs: days with 50 mm (1.97 in) or more of precipitation in 4 years, most in 1916 with 1.
  • 3 fixed thresholds have at least one qualifying day at Alamo Rs.
18 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Alamo Rs Days per year at Alamo Rs with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1916. 01020301916: 231917: 101918: 121926: 161929: 81930: 131931: 171932: 161935: 211937: 71938: 91939: 101940: 181941: 221942: 141943: 151944: 181945: 10191619181929193119351938194019421944
Days per year at Alamo Rs with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1916.
Days with 10 mm (0.39 in) or more of precipitation per year at Alamo Rs
YearDaysDecade average
19162315
19171015
19181215
19261612
1929812
19301313.3
19311713.3
19321613.3
19352113.3
1937713.3
1938913.3
19391013.3
19401816.2
19412216.2
19421416.2
19431516.2
19441816.2
19451016.2
First to last qualifying date each year at Alamo Rs For each year, a bar from the first to the last day at Alamo Rs meeting 10 mm (0.39 in). 1916: 15 January 1916 to 25 December 19161917: 18 January 1917 to 9 September 19171918: 13 January 1918 to 21 December 19181926: 1 February 1926 to 13 December 19261929: 17 January 1929 to 22 September 19291930: 11 January 1930 to 28 November 19301931: 12 February 1931 to 10 December 19311932: 4 January 1932 to 14 December 19321935: 5 January 1935 to 20 December 19351937: 1 January 1937 to 12 December 19371938: 17 February 1938 to 21 December 19381939: 7 January 1939 to 28 November 19391940: 31 January 1940 to 31 December 19401941: 1 January 1941 to 12 December 19411942: 2 January 1942 to 26 December 19421943: 24 January 1943 to 27 December 19431944: 24 January 1944 to 25 December 19441945: 20 January 1945 to 23 December 1945191619261931193719401943JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alamo Rs meeting 10 mm (0.39 in).
First to last qualifying date each year at Alamo Rs
YearFirst dateLast date
19161916-01-151916-12-25
19171917-01-181917-09-09
19181918-01-131918-12-21
19261926-02-011926-12-13
19291929-01-171929-09-22
19301930-01-111930-11-28
19311931-02-121931-12-10
19321932-01-041932-12-14
19351935-01-051935-12-20
19371937-01-011937-12-12
19381938-02-171938-12-21
19391939-01-071939-11-28
19401940-01-311940-12-31
19411941-01-011941-12-12
19421942-01-021942-12-26
19431943-01-241943-12-27
19441944-01-241944-12-25
19451945-01-201945-12-23

Every Fixed Threshold

Fixed thresholds at Alamo Rs
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1823191610
25 mm (0.98 in): Days with 25 mm or more rain15819161
50 mm (1.97 in): Days with 50 mm or more rain4119161

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.

Download the Data

  • Data for Alamo Rs 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).