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San Antonio Kelly AFB Weather Records (USW00012909)

Record envelope, standing records and threshold days for San Antonio Kelly AFB (USW00012909), Texas, United States, with 78 years of record.

Key Facts for San Antonio Kelly AFB

  • San Antonio Kelly AFB (USW00012909) is a weather station in Texas, United States at 29.38 latitude and -98.58 longitude, 208 m (682 ft) above sea level.
  • The station reports from 1949 to 2026, 78 years of record.
  • 1,464 records set at San Antonio Kelly AFB still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • San Antonio Kelly AFB set a daily record high minimum temperature of 26.7 C (80.1 F) on 30 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Texas, United States, 29.38 latitude, -98.58 longitude.
  • Elevation: 208 m (682 ft).
  • Period of record: 1949 to 2026, 78 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

40 days at or beyond a record
Daily record high and record low at San Antonio Kelly AFB, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Antonio Kelly AFB. The lines show the 2026 daily maximum and minimum. 40 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Antonio Kelly AFB. The lines show the 2026 daily maximum and minimum. 40 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at San Antonio Kelly AFB, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan32.8 C (91.0 F)-15.6 C (3.9 F)32.8 C (91.0 F)-6.7 C (19.9 F)
Feb36.7 C (98.1 F)-12.8 C (9.0 F)36.7 C (98.1 F)-2.2 C (28.0 F)
Mar37.8 C (100.0 F)-3.8 C (25.2 F)37.2 C (99.0 F)1.7 C (35.1 F)
Apr38.3 C (100.9 F)0.6 C (33.1 F)35.0 C (95.0 F)9.4 C (48.9 F)
May40.0 C (104.0 F)7.8 C (46.0 F)33.9 C (93.0 F)11.1 C (52.0 F)
Jun41.1 C (106.0 F)12.8 C (55.0 F)36.7 C (98.1 F)21.7 C (71.1 F)
Jul42.2 C (108.0 F)17.8 C (64.0 F)38.3 C (100.9 F)22.8 C (73.0 F)
Aug42.8 C (109.0 F)15.6 C (60.1 F)41.1 C (106.0 F)21.7 C (71.1 F)
Sep40.6 C (105.1 F)8.9 C (48.0 F)38.3 C (100.9 F)22.2 C (72.0 F)
Oct36.7 C (98.1 F)0.6 C (33.1 F)32.8 C (91.0 F)15.0 C (59.0 F)
Nov33.9 C (93.0 F)-5.0 C (23.0 F)n/an/a
Dec32.8 C (91.0 F)-8.8 C (16.2 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Antonio Kelly AFB by the year they were set 1,464 records at San Antonio Kelly AFB still stand. 2025 holds the most, with 88. 02550751001949: 461950: 581951: 571952: 421953: 601954: 471955: 411956: 271957: 361958: 251959: 441960: 581961: 771962: 441963: 321964: 351965: 411966: 211967: 551968: 361969: 321970: 512018: 232019: 432020: 422021: 402022: 652023: 782024: 782025: 882026: 4219491953195719611965196920202024
1,464 records at San Antonio Kelly AFB still stand. 2025 holds the most, with 88.
Standing records at San Antonio Kelly AFB by the year they were set
Year setStanding records
194946
195058
195157
195242
195360
195447
195541
195627
195736
195825
195944
196058
196177
196244
196332
196435
196541
196621
196755
196836
196932
197051
201823
201943
202042
202140
202265
202378
202478
202588
202642

Wettest Day of Each Month

Sep: 161.3 mm (6.4 in)
Record daily precipitation for each month at San Antonio Kelly AFB The wettest day on record for each calendar month at San Antonio Kelly AFB. The most was 161.3 mm (6.4 in) on 21 September 1967. 050100150200 Jan: 88.6 mm (3.5 in), 18 January 1968 Jan Feb: 61.2 mm (2.4 in), 22 February 1949 Feb Mar: 84.8 mm (3.3 in), 18 March 1964 Mar Apr: 87.1 mm (3.4 in), 24 April 1949 Apr May: 118.6 mm (4.7 in), 14 May 1970 May Jun: 83.1 mm (3.3 in), 24 June 1960 Jun Jul: 72.1 mm (2.8 in), 22 July 1961 Jul Aug: 88.4 mm (3.5 in), 20 August 1956 Aug Sep: 161.3 mm (6.4 in), 21 September 1967 Sep Oct: 104.9 mm (4.1 in), 24 October 1963 Oct Nov: 108.7 mm (4.3 in), 4 November 1964 Nov Dec: 58.4 mm (2.3 in), 2 December 1965 Dec
The wettest day on record for each calendar month at San Antonio Kelly AFB. The most was 161.3 mm (6.4 in) on 21 September 1967.
Record daily precipitation for each month at San Antonio Kelly AFB
MonthRecord daily precipitation (mm)Date
Jan88.6 mm (3.5 in)18 January 1968
Feb61.2 mm (2.4 in)22 February 1949
Mar84.8 mm (3.3 in)18 March 1964
Apr87.1 mm (3.4 in)24 April 1949
May118.6 mm (4.7 in)14 May 1970
Jun83.1 mm (3.3 in)24 June 1960
Jul72.1 mm (2.8 in)22 July 1961
Aug88.4 mm (3.5 in)20 August 1956
Sep161.3 mm (6.4 in)21 September 1967
Oct104.9 mm (4.1 in)24 October 1963
Nov108.7 mm (4.3 in)4 November 1964
Dec58.4 mm (2.3 in)2 December 1965

Period of Record Coverage

1949 to 2026
Days with data per year at San Antonio Kelly AFB 31 years of record at San Antonio Kelly AFB, 1949 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 2018, 2026. 1949: 363 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 365 of 366 days1953: 364 of 365 days1954: 365 of 365 days1955: 364 of 365 days1956: 365 of 366 days1957: 363 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 363 of 365 days1967: 364 of 365 days1968: 335 of 366 days1969: 363 of 365 days1970: 363 of 365 days2018: 199 of 365 days2019: 351 of 365 days2020: 357 of 366 days2021: 359 of 365 days2022: 363 of 365 days2023: 364 of 365 days2024: 366 of 366 days2025: 360 of 365 days2026: 282 of 365 days1950195519601965197020202025
31 years of record at San Antonio Kelly AFB, 1949 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 2018, 2026.
Days with data per year at San Antonio Kelly AFB
YearDays with dataShare of yearComplete
194936399%Yes
1950365100%Yes
1951365100%Yes
1952365100%Yes
1953364100%Yes
1954365100%Yes
1955364100%Yes
1956365100%Yes
195736399%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
196636399%Yes
1967364100%Yes
196833592%Yes
196936399%Yes
197036399%Yes
201819955%No
201935196%Yes
202035798%Yes
202135998%Yes
202236399%Yes
2023364100%Yes
2024366100%Yes
202536099%Yes
202628277%No

Latest Records

20
Latest records at San Antonio Kelly AFB
DateStationRecordValueBeat old record byOld record stoodSignificance
30 September 2026San Antonio Kelly AFB, USdaily high min (Provisional)26.7 C (80.1 F)0.6 C (1.1 F)7 years10 of 100 (Routine)
29 September 2026San Antonio Kelly AFB, USdaily high max (Provisional)37.2 C (99.0 F)0.5 C (0.9 F)7 years10 of 100 (Routine)
21 September 2026San Antonio Kelly AFB, USdaily high max (Tie, Provisional)36.7 C (98.1 F)tie3 years1 of 100 (Routine)
17 September 2026San Antonio Kelly AFB, USdaily high min (Tie, Provisional)25.0 C (77.0 F)tie56 years5 of 100 (Routine)
17 September 2026San Antonio Kelly AFB, USdaily high max (Tie, Provisional)36.1 C (97.0 F)tie4 years2 of 100 (Routine)
16 September 2026San Antonio Kelly AFB, USdaily high min (Provisional)25.6 C (78.1 F)1.2 C (2.2 F)56 years26 of 100 (Routine)
16 September 2026San Antonio Kelly AFB, USdaily high max (Tie, Provisional)37.2 C (99.0 F)tie76 years7 of 100 (Routine)
15 September 2026San Antonio Kelly AFB, USdaily high max (Provisional)38.3 C (100.9 F)1.6 C (2.9 F)76 years33 of 100 (Routine)
15 September 2026San Antonio Kelly AFB, USdaily high min (Provisional)26.7 C (80.1 F)0.6 C (1.1 F)76 years30 of 100 (Routine)
14 September 2026San Antonio Kelly AFB, USdaily high max (Provisional)38.3 C (100.9 F)0.5 C (0.9 F)76 years30 of 100 (Routine)
14 September 2026San Antonio Kelly AFB, USdaily high min (Tie, Provisional)26.1 C (79.0 F)tie76 years7 of 100 (Routine)
13 September 2026San Antonio Kelly AFB, USdaily high max (Provisional)38.3 C (100.9 F)1.1 C (2.0 F)76 years32 of 100 (Routine)
13 September 2026San Antonio Kelly AFB, USdaily high min (Provisional)26.7 C (80.1 F)0.6 C (1.1 F)3 years8 of 100 (Routine)
12 September 2026San Antonio Kelly AFB, USdaily high max (Provisional)38.3 C (100.9 F)2.2 C (4.0 F)76 years36 of 100 (Notable)
12 September 2026San Antonio Kelly AFB, USdaily high min (Tie, Provisional)26.1 C (79.0 F)tie76 years7 of 100 (Routine)
11 September 2026San Antonio Kelly AFB, USdaily high min (Provisional)25.6 C (78.1 F)0.6 C (1.1 F)75 years30 of 100 (Routine)
11 September 2026San Antonio Kelly AFB, USdaily high max (Provisional)38.3 C (100.9 F)1.6 C (2.9 F)3 years11 of 100 (Routine)
9 September 2026San Antonio Kelly AFB, USdaily high min (Provisional)26.1 C (79.0 F)0.5 C (0.9 F)75 years30 of 100 (Routine)
8 September 2026San Antonio Kelly AFB, USdaily high min (Provisional)26.1 C (79.0 F)1.1 C (2.0 F)75 years32 of 100 (Routine)
5 September 2026San Antonio Kelly AFB, USdaily high min (Tie, Provisional)26.1 C (79.0 F)tie3 years1 of 100 (Routine)

Climate Trend

28 complete years, 1949 to 2025
Annual mean temperature at San Antonio Kelly AFB as warming stripes, 1949 to 2025 One stripe for each of 28 complete years at San Antonio Kelly AFB, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 21.2 C (70.1 F); red stripes are warmer. The coolest year was 1960, at 19.6 C (67.2 F), and the warmest was 2024, at 23.4 C (74.1 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1949: 21.2 C, +0.1 C from the station mean1950: 22.0 C, +0.8 C from the station mean1951: 21.7 C, +0.5 C from the station mean1952: 21.2 C, 0.0 C from the station mean1953: 22.0 C, +0.8 C from the station mean1954: 22.6 C, +1.4 C from the station mean1955: 21.9 C, +0.7 C from the station mean1956: 21.8 C, +0.6 C from the station mean1957: 21.0 C, -0.1 C from the station mean1958: 20.3 C, -0.9 C from the station mean1959: 20.0 C, -1.2 C from the station mean1960: 19.6 C, -1.6 C from the station mean1961: 19.6 C, -1.6 C from the station mean1962: 20.9 C, -0.3 C from the station mean1963: 20.6 C, -0.5 C from the station mean1964: 20.2 C, -1.0 C from the station mean1965: 20.0 C, -1.2 C from the station mean1966: 20.1 C, -1.1 C from the station mean1967: 21.0 C, -0.2 C from the station mean1969: 20.3 C, -0.9 C from the station mean1970: 20.1 C, -1.1 C from the station mean2019: 21.4 C, +0.2 C from the station mean2020: 22.0 C, +0.8 C from the station mean2021: 21.2 C, 0.0 C from the station mean2022: 21.5 C, +0.4 C from the station mean2023: 22.4 C, +1.2 C from the station mean2024: 23.4 C, +2.2 C from the station mean2025: 23.1 C, +1.9 C from the station mean19491960197019801990200020102020
One stripe for each of 28 complete years at San Antonio Kelly AFB, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 21.2 C (70.1 F); red stripes are warmer. The coolest year was 1960, at 19.6 C (67.2 F), and the warmest was 2024, at 23.4 C (74.1 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at San Antonio Kelly AFB as warming stripes, 1949 to 2025
YearAnnual mean temperatureDifference from the station mean
194921.2 C+0.06 C
195022.0 C+0.82 C
195121.7 C+0.53 C
195221.2 C-0.01 C
195322.0 C+0.81 C
195422.6 C+1.43 C
195521.9 C+0.71 C
195621.8 C+0.63 C
195721.0 C-0.14 C
195820.3 C-0.89 C
195920.0 C-1.19 C
196019.6 C-1.60 C
196119.6 C-1.57 C
196220.9 C-0.31 C
196320.6 C-0.54 C
196420.2 C-0.98 C
196520.0 C-1.22 C
196620.1 C-1.10 C
196721.0 C-0.20 C
196920.3 C-0.91 C
197020.1 C-1.07 C
201921.4 C+0.18 C
202022.0 C+0.84 C
202121.2 C+0.04 C
202221.5 C+0.36 C
202322.4 C+1.18 C
202423.4 C+2.21 C
202523.1 C+1.94 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1949 to 2026
Yearly extremes at San Antonio Kelly AFB: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.8 C (109.0 F)202439.4 C (102.9 F)31
Coldest night (TNn)-15.6 C (3.9 F)1949-5.6 C (21.9 F)31
Wettest day (Rx1day)161.3 mm (6.4 in)196765.5 mm (2.6 in)31
Wettest five days (Rx5day)237.0 mm (9.3 in)1967100.5 mm (4.0 in)31
Longest dry spell (CDD)73 days195442 days31

Hottest day (TXx)

Hottest day (TXx) at San Antonio Kelly AFB by year The hottest day of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 42.8 C (109.0 F) in 2024, marked on the chart; the median year is 39.4 C (102.9 F). 36384042441960198020002020Record: 42.8 C (109.0 F) in 2024
The hottest day of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 42.8 C (109.0 F) in 2024, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at San Antonio Kelly AFB by year
YearHottest day (TXx)
194937.8 C (100.0 F)
195038.9 C (102.0 F)
195140.0 C (104.0 F)
195239.4 C (102.9 F)
195341.1 C (106.0 F)
195442.2 C (108.0 F)
195538.9 C (102.0 F)
195638.9 C (102.0 F)
195739.4 C (102.9 F)
195838.3 C (100.9 F)
195937.8 C (100.0 F)
196040.0 C (104.0 F)
196136.7 C (98.1 F)
196241.1 C (106.0 F)
196338.3 C (100.9 F)
196441.1 C (106.0 F)
196537.2 C (99.0 F)
196637.8 C (100.0 F)
196739.4 C (102.9 F)
196837.2 C (99.0 F)
196940.0 C (104.0 F)
197040.0 C (104.0 F)
201841.1 C (106.0 F)
201939.4 C (102.9 F)
202042.2 C (108.0 F)
202137.8 C (100.0 F)
202241.7 C (107.1 F)
202341.1 C (106.0 F)
202442.8 C (109.0 F)
202540.6 C (105.1 F)
202641.1 C (106.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Antonio Kelly AFB by year The coldest night of the year at San Antonio Kelly AFB, 1949 to 2026. The record is -15.6 C (3.9 F) in 1949, marked on the chart; the median year is -5.6 C (21.9 F). -20-15-10-501960198020002020Record: -15.6 C (3.9 F) in 1949
The coldest night of the year at San Antonio Kelly AFB, 1949 to 2026. The record is -15.6 C (3.9 F) in 1949, marked on the chart; the median year is -5.6 C (21.9 F).
Coldest night (TNn) at San Antonio Kelly AFB by year
YearColdest night (TNn)
1949-15.6 C (3.9 F)
1950-8.3 C (17.1 F)
1951-12.8 C (9.0 F)
1952-1.7 C (28.9 F)
1953-4.4 C (24.1 F)
1954-1.1 C (30.0 F)
1955-3.3 C (26.1 F)
1956-3.3 C (26.1 F)
1957-4.4 C (24.1 F)
1958-3.9 C (25.0 F)
1959-6.1 C (21.0 F)
1960-5.6 C (21.9 F)
1961-3.9 C (25.0 F)
1962-12.2 C (10.0 F)
1963-8.9 C (16.0 F)
1964-10.0 C (14.0 F)
1965-3.9 C (25.0 F)
1966-7.2 C (19.0 F)
1967-5.0 C (23.0 F)
1968-3.9 C (25.0 F)
1969-5.6 C (21.9 F)
1970-8.9 C (16.0 F)
2018-4.3 C (24.3 F)
2019-4.3 C (24.3 F)
2020-3.2 C (26.2 F)
2021-12.1 C (10.2 F)
2022-8.8 C (16.2 F)
2023-1.0 C (30.2 F)
2024-8.2 C (17.2 F)
2025-7.2 C (19.0 F)
2026-6.7 C (19.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Antonio Kelly AFB by year The wettest day of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 161.3 mm (6.4 in) in 1967, marked on the chart; the median year is 65.5 mm (2.6 in). 0501001502001960198020002020Record: 161.3 mm (6.4 in) in 1967
The wettest day of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 161.3 mm (6.4 in) in 1967, marked on the chart; the median year is 65.5 mm (2.6 in).
Wettest day (Rx1day) at San Antonio Kelly AFB by year
YearWettest day (Rx1day)
194987.1 mm (3.4 in)
195044.5 mm (1.8 in)
195160.5 mm (2.4 in)
195262.5 mm (2.5 in)
195339.6 mm (1.6 in)
195426.4 mm (1.0 in)
195552.1 mm (2.1 in)
195688.4 mm (3.5 in)
195790.9 mm (3.6 in)
195859.9 mm (2.4 in)
1959103.4 mm (4.1 in)
196083.1 mm (3.3 in)
196172.1 mm (2.8 in)
196240.9 mm (1.6 in)
1963104.9 mm (4.1 in)
1964108.7 mm (4.3 in)
196590.2 mm (3.6 in)
196644.7 mm (1.8 in)
1967161.3 mm (6.4 in)
196888.6 mm (3.5 in)
196967.6 mm (2.7 in)
1970118.6 mm (4.7 in)
201869.1 mm (2.7 in)
201955.1 mm (2.2 in)
202046.7 mm (1.8 in)
202160.5 mm (2.4 in)
202251.3 mm (2.0 in)
202365.5 mm (2.6 in)
202442.7 mm (1.7 in)
202547.2 mm (1.9 in)
202665.5 mm (2.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Antonio Kelly AFB by year The wettest five days of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 237.0 mm (9.3 in) in 1967, marked on the chart; the median year is 100.5 mm (4.0 in). 01002003001960198020002020Record: 237.0 mm (9.3 in) in 1967
The wettest five days of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 237.0 mm (9.3 in) in 1967, marked on the chart; the median year is 100.5 mm (4.0 in).
Wettest five days (Rx5day) at San Antonio Kelly AFB by year
YearWettest five days (Rx5day)
1949155.3 mm (6.1 in)
195055.3 mm (2.2 in)
195171.4 mm (2.8 in)
195294.2 mm (3.7 in)
1953113.0 mm (4.4 in)
195433.8 mm (1.3 in)
195590.6 mm (3.6 in)
195688.4 mm (3.5 in)
1957216.1 mm (8.5 in)
1958100.5 mm (4.0 in)
1959118.6 mm (4.7 in)
1960115.8 mm (4.6 in)
196191.4 mm (3.6 in)
196281.8 mm (3.2 in)
1963144.4 mm (5.7 in)
1964111.0 mm (4.4 in)
1965126.8 mm (5.0 in)
196652.1 mm (2.1 in)
1967237.0 mm (9.3 in)
1968197.0 mm (7.8 in)
1969169.4 mm (6.7 in)
1970125.5 mm (4.9 in)
2018112.5 mm (4.4 in)
201963.0 mm (2.5 in)
202070.3 mm (2.8 in)
2021127.5 mm (5.0 in)
202262.3 mm (2.5 in)
202389.1 mm (3.5 in)
2024108.7 mm (4.3 in)
202540.1 mm (1.6 in)
202669.3 mm (2.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Antonio Kelly AFB by year The longest dry spell of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 73 days in 1954, marked on the chart; the median year is 42 days. 0204060801960198020002020Record: 73 days in 1954
The longest dry spell of the year at San Antonio Kelly AFB, 1949 to 2026. The record is 73 days in 1954, marked on the chart; the median year is 42 days.
Longest dry spell (CDD) at San Antonio Kelly AFB by year
YearLongest dry spell (CDD)
194929 days
195047 days
195141 days
195252 days
195345 days
195473 days
195531 days
195642 days
195773 days
195844 days
195931 days
196031 days
196140 days
196244 days
196344 days
196422 days
196540 days
196644 days
196745 days
196819 days
196960 days
197056 days
201833 days
201972 days
202036 days
202131 days
202246 days
202329 days
202450 days
20257 days
20267 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

26 years with a frost

Across 26 years with a frost, the median last spring frost at San Antonio Kelly AFB falls on 26 February and the median first autumn frost on 3 December, which leaves a median of 282 days between them.

Fitted over all years, the growing season changes by +0.3 days per decade at this station.

Frost dates and growing season at San Antonio Kelly AFB
MeasureMedian, all yearsEarliest periodRecent period (1949 to 2025)Recent against earliestFitted trend
Last spring frost26 Februaryn/a26 Februaryn/a+0.2 days per decade
First autumn frost3 Decembern/a3 Decembern/a+0.4 days per decade
Growing days282 daysn/a282 daysn/a+0.3 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

  • Data for San Antonio Kelly AFB standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Antonio Kelly AFB 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).