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Port O'Connor Weather Records (USC00417186)

Record envelope, standing records and threshold days for Port O'Connor (USC00417186), Texas, United States, with 66 years of record.

Key Facts for Port O'Connor

  • Port O'Connor (USC00417186) is a weather station in Texas, United States at 28.43 latitude and -96.43 longitude, 2 m (5 ft) above sea level.
  • The station reports from 1948 to 2013, 66 years of record.
  • 1,464 records set at Port O'Connor still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Port O'Connor set a daily record precipitation of 98.8 mm (3.9 in) on 30 September 2012.

About the Station

  • Location: Texas, United States, 28.43 latitude, -96.43 longitude.
  • Elevation: 2 m (5 ft).
  • Period of record: 1948 to 2013, 66 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Port O'Connor, with 2026 drawn through them The band shows the record high and record low for each calendar day at Port O'Connor. The lines show the 2026 daily maximum and minimum. 0 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 Port O'Connor. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Port O'Connor, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan29.4 C (84.9 F)-8.9 C (16.0 F)n/an/a
Feb30.0 C (86.0 F)-8.9 C (16.0 F)n/an/a
Mar31.7 C (89.1 F)-9.4 C (15.1 F)n/an/a
Apr33.3 C (91.9 F)3.3 C (37.9 F)n/an/a
May36.1 C (97.0 F)10.0 C (50.0 F)n/an/a
Jun38.9 C (102.0 F)15.0 C (59.0 F)n/an/a
Jul38.9 C (102.0 F)16.1 C (61.0 F)n/an/a
Aug38.9 C (102.0 F)12.8 C (55.0 F)n/an/a
Sep42.8 C (109.0 F)11.1 C (52.0 F)n/an/a
Oct41.7 C (107.1 F)2.8 C (37.0 F)n/an/a
Nov33.9 C (93.0 F)-1.7 C (28.9 F)n/an/a
Dec31.7 C (89.1 F)-12.2 C (10.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Port O'Connor by the year they were set 1,464 records at Port O'Connor still stand. 2008 holds the most, with 54. 02040601948: 161949: 281950: 421951: 341952: 181953: 181954: 151955: 301956: 171957: 251958: 181959: 261960: 211961: 181962: 151963: 301964: 141965: 221966: 201967: 201968: 151969: 331970: 411971: 391972: 441973: 461974: 491975: 291976: 231977: 111978: 261979: 241980: 201981: 171982: 191983: 281984: 161985: 231986: 21987: 211988: 191989: 431990: 71993: 51994: 71995: 241996: 321997: 161998: 191999: 132000: 112001: 332002: 292005: 232006: 322007: 382008: 542009: 122010: 142011: 362012: 24194819551962196919761983199019992008
1,464 records at Port O'Connor still stand. 2008 holds the most, with 54.
Standing records at Port O'Connor by the year they were set
Year setStanding records
194816
194928
195042
195134
195218
195318
195415
195530
195617
195725
195818
195926
196021
196118
196215
196330
196414
196522
196620
196720
196815
196933
197041
197139
197244
197346
197449
197529
197623
197711
197826
197924
198020
198117
198219
198328
198416
198523
19862
198721
198819
198943
19907
19935
19947
199524
199632
199716
199819
199913
200011
200133
200229
200523
200632
200738
200854
200912
201014
201136
201224

All-Time Record Progression

6 new records
When Port O'Connor set new all-time records 6 all-time records were set at Port O'Connor between 25 December 1983 and 14 September 2008. Each dot is a new record. Record low minimum temperatureRecord high maximum temperature25 December 1983: Record low minimum temperature -10.0 C (14.0 F)23 December 1989: Record low minimum temperature -12.2 C (10.0 F)30 August 2005: Record high maximum temperature 38.3 C (100.9 F)24 September 2005: Record high maximum temperature 38.9 C (102.0 F)13 September 2008: Record high maximum temperature 42.2 C (108.0 F)14 September 2008: Record high maximum temperature 42.8 C (109.0 F)19851990199520002005
6 all-time records were set at Port O'Connor between 25 December 1983 and 14 September 2008. Each dot is a new record.
When Port O'Connor set new all-time records
DateKindDetail
1983-12-25Record low minimum temperatureRecord low minimum temperature -10.0 C (14.0 F)
1989-12-23Record low minimum temperatureRecord low minimum temperature -12.2 C (10.0 F)
2005-08-30Record high maximum temperatureRecord high maximum temperature 38.3 C (100.9 F)
2005-09-24Record high maximum temperatureRecord high maximum temperature 38.9 C (102.0 F)
2008-09-13Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)
2008-09-14Record high maximum temperatureRecord high maximum temperature 42.8 C (109.0 F)

Wettest Day of Each Month

Jul: 317.5 mm (12.5 in)
Record daily precipitation for each month at Port O'Connor The wettest day on record for each calendar month at Port O'Connor. The most was 317.5 mm (12.5 in) on 10 July 1976. 0100200300400 Jan: 101.6 mm (4.0 in), 30 January 2007 Jan Feb: 101.1 mm (4.0 in), 26 February 1982 Feb Mar: 79.0 mm (3.1 in), 21 March 1979 Mar Apr: 196.9 mm (7.8 in), 16 April 1957 Apr May: 123.7 mm (4.9 in), 22 May 1977 May Jun: 113.0 mm (4.4 in), 10 June 1961 Jun Jul: 317.5 mm (12.5 in), 10 July 1976 Jul Aug: 207.0 mm (8.1 in), 31 August 1996 Aug Sep: 175.8 mm (6.9 in), 19 September 1979 Sep Oct: 309.9 mm (12.2 in), 20 October 1984 Oct Nov: 89.2 mm (3.5 in), 9 November 1963 Nov Dec: 165.1 mm (6.5 in), 20 December 2006 Dec
The wettest day on record for each calendar month at Port O'Connor. The most was 317.5 mm (12.5 in) on 10 July 1976.
Record daily precipitation for each month at Port O'Connor
MonthRecord daily precipitation (mm)Date
Jan101.6 mm (4.0 in)30 January 2007
Feb101.1 mm (4.0 in)26 February 1982
Mar79.0 mm (3.1 in)21 March 1979
Apr196.9 mm (7.8 in)16 April 1957
May123.7 mm (4.9 in)22 May 1977
Jun113.0 mm (4.4 in)10 June 1961
Jul317.5 mm (12.5 in)10 July 1976
Aug207.0 mm (8.1 in)31 August 1996
Sep175.8 mm (6.9 in)19 September 1979
Oct309.9 mm (12.2 in)20 October 1984
Nov89.2 mm (3.5 in)9 November 1963
Dec165.1 mm (6.5 in)20 December 2006

Period of Record Coverage

1948 to 2013
Days with data per year at Port O'Connor 62 years of record at Port O'Connor, 1948 to 2013. 25 years have data for under 90 percent of days and are left out of rankings: 1948, 1961, 1963, 1966, 1967, 1976, 1985, 1986 and others. 1948: 267 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 364 of 365 days1952: 366 of 366 days1953: 364 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 362 of 365 days1958: 365 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 304 of 365 days1962: 364 of 365 days1963: 268 of 365 days1964: 365 of 366 days1965: 345 of 365 days1966: 260 of 365 days1967: 211 of 365 days1968: 364 of 366 days1969: 365 of 365 days1970: 364 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 364 of 365 days1974: 362 of 365 days1975: 351 of 365 days1976: 244 of 366 days1977: 365 of 365 days1978: 364 of 365 days1979: 364 of 365 days1980: 363 of 366 days1981: 365 of 365 days1982: 363 of 365 days1983: 363 of 365 days1984: 365 of 366 days1985: 243 of 365 days1986: 27 of 365 days1987: 247 of 365 days1988: 225 of 366 days1989: 292 of 365 days1990: 85 of 365 days1993: 54 of 365 days1994: 220 of 365 days1995: 353 of 365 days1996: 318 of 366 days1997: 335 of 365 days1998: 335 of 365 days1999: 213 of 365 days2000: 191 of 366 days2001: 314 of 365 days2002: 176 of 365 days2005: 326 of 365 days2006: 352 of 365 days2007: 257 of 365 days2008: 329 of 366 days2009: 354 of 365 days2010: 284 of 365 days2011: 349 of 365 days2012: 250 of 366 days2013: 1 of 365 days1950196019701980199020002010
62 years of record at Port O'Connor, 1948 to 2013. 25 years have data for under 90 percent of days and are left out of rankings: 1948, 1961, 1963, 1966, 1967, 1976, 1985, 1986 and others.
Days with data per year at Port O'Connor
YearDays with dataShare of yearComplete
194826773%No
1949365100%Yes
1950365100%Yes
1951364100%Yes
1952366100%Yes
1953364100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
195736299%Yes
1958365100%Yes
1959364100%Yes
1960366100%Yes
196130483%No
1962364100%Yes
196326873%No
1964365100%Yes
196534595%Yes
196626071%No
196721158%No
196836499%Yes
1969365100%Yes
1970364100%Yes
1971365100%Yes
1972365100%Yes
1973364100%Yes
197436299%Yes
197535196%Yes
197624467%No
1977365100%Yes
1978364100%Yes
1979364100%Yes
198036399%Yes
1981365100%Yes
198236399%Yes
198336399%Yes
1984365100%Yes
198524367%No
1986277%No
198724768%No
198822561%No
198929280%No
19908523%No
19935415%No
199422060%No
199535397%Yes
199631887%No
199733592%Yes
199833592%Yes
199921358%No
200019152%No
200131486%No
200217648%No
200532689%No
200635296%Yes
200725770%No
200832990%No
200935497%Yes
201028478%No
201134996%Yes
201225068%No
201310%No

Latest Records

20
Latest records at Port O'Connor
DateStationRecordValueBeat old record byOld record stoodSignificance
30 September 2012Port O'Connor, USdaily rain98.8 mm (3.9 in)61.5 mm (2.4 in)7 years31 of 100 (Routine)
29 September 2012Port O'Connor, USdaily rain50.8 mm (2.0 in)2.5 mm (0.10 in)27 years14 of 100 (Routine)
15 September 2012Port O'Connor, USdaily rain48.3 mm (1.9 in)8.4 mm (0.33 in)40 years21 of 100 (Routine)
3 September 2012Port O'Connor, USdaily high max38.9 C (102.0 F)0.6 C (1.1 F)4 years9 of 100 (Routine)
2 September 2012Port O'Connor, USdaily high max38.3 C (100.9 F)0.5 C (0.9 F)4 years9 of 100 (Routine)
1 September 2012Port O'Connor, USdaily high max38.3 C (100.9 F)0.5 C (0.9 F)4 years9 of 100 (Routine)
31 August 2012Port O'Connor, USdaily high max38.3 C (100.9 F)0.5 C (0.9 F)58 years26 of 100 (Routine)
29 August 2012Port O'Connor, USdaily high max36.7 C (98.1 F)0.6 C (1.1 F)7 years11 of 100 (Routine)
3 August 2012Port O'Connor, USdaily high min (Tie)28.3 C (82.9 F)tie42 years4 of 100 (Routine)
2 July 2012Port O'Connor, USdaily rain101.6 mm (4.0 in)48.3 mm (1.9 in)6 years21 of 100 (Routine)
1 July 2012Port O'Connor, USdaily rain34.8 mm (1.4 in)6.6 mm (0.26 in)25 years14 of 100 (Routine)
1 July 2012Port O'Connor, USmonthly high max (Tie)38.9 C (102.0 F)tie5 years4 of 100 (Routine)
30 June 2012Port O'Connor, USmonthly high max38.9 C (102.0 F)0.6 C (1.1 F)4 years20 of 100 (Routine)
28 June 2012Port O'Connor, USmonthly high max (Tie)38.3 C (100.9 F)tie4 years4 of 100 (Routine)
26 June 2012Port O'Connor, USdaily high max37.2 C (99.0 F)1.1 C (2.0 F)28 years20 of 100 (Routine)
24 June 2012Port O'Connor, USdaily high max35.0 C (95.0 F)1.1 C (2.0 F)38 years23 of 100 (Routine)
11 June 2012Port O'Connor, USdaily high min (Tie)27.8 C (82.0 F)tie2 years1 of 100 (Routine)
9 June 2012Port O'Connor, USdaily low max26.7 C (80.1 F)0.5 C (0.9 F)15 years13 of 100 (Routine)
11 May 2012Port O'Connor, USdaily low max22.8 C (73.0 F)2.2 C (4.0 F)31 years25 of 100 (Routine)
23 April 2012Port O'Connor, USdaily high max32.2 C (90.0 F)2.2 C (4.0 F)1 year14 of 100 (Routine)

Climate Trend

34 complete years, 1949 to 2011
Annual mean temperature at Port O'Connor as warming stripes, 1949 to 2011 One stripe for each of 34 complete years at Port O'Connor, 1949 to 2011. Blue stripes are years cooler than the station's own mean of 21.5 C (70.8 F); red stripes are warmer. The coolest year was 1979, at 20.5 C (68.9 F), and the warmest was 2006, at 22.7 C (72.9 F). The strongest colour marks a difference of 1.2 C (2.2 F). 1949: 21.5 C, 0.0 C from the station mean1950: 22.3 C, +0.8 C from the station mean1951: 21.3 C, -0.2 C from the station mean1952: 21.0 C, -0.6 C from the station mean1953: 21.5 C, -0.1 C from the station mean1954: 22.0 C, +0.5 C from the station mean1955: 21.6 C, +0.1 C from the station mean1956: 21.8 C, +0.3 C from the station mean1957: 21.6 C, +0.1 C from the station mean1958: 21.1 C, -0.4 C from the station mean1959: 20.8 C, -0.7 C from the station mean1960: 20.9 C, -0.7 C from the station mean1962: 21.4 C, -0.2 C from the station mean1964: 21.3 C, -0.3 C from the station mean1968: 20.6 C, -1.0 C from the station mean1969: 21.3 C, -0.2 C from the station mean1970: 21.1 C, -0.5 C from the station mean1971: 22.5 C, +1.0 C from the station mean1973: 22.0 C, +0.4 C from the station mean1974: 22.1 C, +0.5 C from the station mean1975: 21.5 C, -0.1 C from the station mean1977: 21.6 C, +0.1 C from the station mean1978: 20.8 C, -0.7 C from the station mean1979: 20.5 C, -1.0 C from the station mean1980: 21.3 C, -0.2 C from the station mean1981: 21.9 C, +0.3 C from the station mean1982: 21.7 C, +0.1 C from the station mean1983: 21.0 C, -0.5 C from the station mean1984: 21.8 C, +0.3 C from the station mean1995: 21.9 C, +0.4 C from the station mean1997: 21.5 C, 0.0 C from the station mean2006: 22.7 C, +1.2 C from the station mean2009: 21.9 C, +0.4 C from the station mean2011: 22.3 C, +0.8 C from the station mean1949196019701980199020002010
One stripe for each of 34 complete years at Port O'Connor, 1949 to 2011. Blue stripes are years cooler than the station's own mean of 21.5 C (70.8 F); red stripes are warmer. The coolest year was 1979, at 20.5 C (68.9 F), and the warmest was 2006, at 22.7 C (72.9 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Port O'Connor as warming stripes, 1949 to 2011
YearAnnual mean temperatureDifference from the station mean
194921.5 C-0.03 C
195022.3 C+0.79 C
195121.3 C-0.21 C
195221.0 C-0.56 C
195321.5 C-0.06 C
195422.0 C+0.49 C
195521.6 C+0.07 C
195621.8 C+0.28 C
195721.6 C+0.09 C
195821.1 C-0.40 C
195920.8 C-0.74 C
196020.9 C-0.65 C
196221.4 C-0.17 C
196421.3 C-0.28 C
196820.6 C-0.95 C
196921.3 C-0.21 C
197021.1 C-0.45 C
197122.5 C+0.97 C
197322.0 C+0.45 C
197422.1 C+0.53 C
197521.5 C-0.08 C
197721.6 C+0.11 C
197820.8 C-0.71 C
197920.5 C-1.02 C
198021.3 C-0.21 C
198121.9 C+0.34 C
198221.7 C+0.14 C
198321.0 C-0.53 C
198421.8 C+0.30 C
199521.9 C+0.39 C
199721.5 C+0.01 C
200622.7 C+1.19 C
200921.9 C+0.36 C
201122.3 C+0.81 C

The fitted trend in annual mean temperature here over 1949 to 2011 is 0.10 C (0.00 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.19 F (-0.01 to 0.38) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Port O'Connor
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.10 C (0.00 to 0.21) per decade0.19 F (-0.01 to 0.38) per decade1949 to 201134Not clearly different from zero
Mean daily maximum0.1 C (0.0 to 0.3) per decade0.3 F (0.0 to 0.5) per decade1949 to 201134Not clearly different from zero
Mean daily minimum0.1 C (-0.1 to 0.2) per decade0.1 F (-0.1 to 0.3) per decade1949 to 201134Not clearly different from zero

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

1948 to 2013
Yearly extremes at Port O'Connor: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.8 C (109.0 F)200835.3 C (95.5 F)62
Coldest night (TNn)-12.2 C (10.0 F)1989-2.8 C (27.0 F)62
Wettest day (Rx1day)317.5 mm (12.5 in)197688.4 mm (3.5 in)63
Wettest five days (Rx5day)667.3 mm (26.3 in)2006134.8 mm (5.3 in)62
Longest dry spell (CDD)175 days199633 days63

Hottest day (TXx)

Hottest day (TXx) at Port O'Connor by year The hottest day of the year at Port O'Connor, 1948 to 2013. The record is 42.8 C (109.0 F) in 2008, marked on the chart; the median year is 35.3 C (95.5 F). 20304050196019802000Record: 42.8 C (109.0 F) in 2008
The hottest day of the year at Port O'Connor, 1948 to 2013. The record is 42.8 C (109.0 F) in 2008, marked on the chart; the median year is 35.3 C (95.5 F).
Hottest day (TXx) at Port O'Connor by year
YearHottest day (TXx)
194834.4 C (93.9 F)
194935.0 C (95.0 F)
195034.4 C (93.9 F)
195135.6 C (96.1 F)
195234.4 C (93.9 F)
195335.0 C (95.0 F)
195437.8 C (100.0 F)
195534.4 C (93.9 F)
195635.0 C (95.0 F)
195734.4 C (93.9 F)
195835.0 C (95.0 F)
195933.9 C (93.0 F)
196036.1 C (97.0 F)
196133.3 C (91.9 F)
196236.1 C (97.0 F)
196336.7 C (98.1 F)
196435.6 C (96.1 F)
196537.2 C (99.0 F)
196635.6 C (96.1 F)
196735.6 C (96.1 F)
196833.9 C (93.0 F)
196934.4 C (93.9 F)
197034.4 C (93.9 F)
197136.7 C (98.1 F)
197235.0 C (95.0 F)
197336.1 C (97.0 F)
197436.1 C (97.0 F)
197534.4 C (93.9 F)
197636.1 C (97.0 F)
197735.6 C (96.1 F)
197835.0 C (95.0 F)
197933.9 C (93.0 F)
198035.0 C (95.0 F)
198135.0 C (95.0 F)
198235.0 C (95.0 F)
198335.6 C (96.1 F)
198436.1 C (97.0 F)
198536.1 C (97.0 F)
198625.0 C (77.0 F)
198733.9 C (93.0 F)
198834.4 C (93.9 F)
198935.6 C (96.1 F)
199030.0 C (86.0 F)
199336.1 C (97.0 F)
199432.2 C (90.0 F)
199535.6 C (96.1 F)
199632.2 C (90.0 F)
199733.9 C (93.0 F)
199836.7 C (98.1 F)
199933.3 C (91.9 F)
200036.1 C (97.0 F)
200137.2 C (99.0 F)
200234.4 C (93.9 F)
2003n/a
200538.9 C (102.0 F)
200638.9 C (102.0 F)
200738.9 C (102.0 F)
200842.8 C (109.0 F)
200936.1 C (97.0 F)
201036.1 C (97.0 F)
201140.0 C (104.0 F)
201238.9 C (102.0 F)
201321.1 C (70.0 F)

Coldest night (TNn)

Coldest night (TNn) at Port O'Connor by year The coldest night of the year at Port O'Connor, 1948 to 2013. The record is -12.2 C (10.0 F) in 1989, marked on the chart; the median year is -2.8 C (27.0 F). -20-10010196019802000Record: -12.2 C (10.0 F) in 1989
The coldest night of the year at Port O'Connor, 1948 to 2013. The record is -12.2 C (10.0 F) in 1989, marked on the chart; the median year is -2.8 C (27.0 F).
Coldest night (TNn) at Port O'Connor by year
YearColdest night (TNn)
19481.7 C (35.1 F)
1949-8.9 C (16.0 F)
1950-6.7 C (19.9 F)
1951-8.3 C (17.1 F)
19521.1 C (34.0 F)
1953-2.2 C (28.0 F)
1954-3.9 C (25.0 F)
1955-1.7 C (28.9 F)
19560.0 C (32.0 F)
1957-3.3 C (26.1 F)
1958-1.1 C (30.0 F)
1959-4.4 C (24.1 F)
1960-2.8 C (27.0 F)
1961-0.6 C (30.9 F)
1962-7.2 C (19.0 F)
1963-7.2 C (19.0 F)
1964-2.8 C (27.0 F)
1965-1.7 C (28.9 F)
1966-5.0 C (23.0 F)
19670.0 C (32.0 F)
1968-3.9 C (25.0 F)
1969-4.4 C (24.1 F)
1970-3.9 C (25.0 F)
1971-2.8 C (27.0 F)
1972-3.9 C (25.0 F)
1973-5.6 C (21.9 F)
19740.0 C (32.0 F)
1975-5.6 C (21.9 F)
1976-5.6 C (21.9 F)
1977-4.4 C (24.1 F)
1978-3.9 C (25.0 F)
1979-6.7 C (19.9 F)
1980-4.4 C (24.1 F)
1981-4.4 C (24.1 F)
1982-8.3 C (17.1 F)
1983-10.0 C (14.0 F)
1984-4.4 C (24.1 F)
1985-5.6 C (21.9 F)
19862.2 C (36.0 F)
19871.7 C (35.1 F)
1988-1.1 C (30.0 F)
1989-12.2 C (10.0 F)
19905.0 C (41.0 F)
19931.7 C (35.1 F)
1994-1.1 C (30.0 F)
19951.1 C (34.0 F)
1996-4.4 C (24.1 F)
19970.0 C (32.0 F)
19981.1 C (34.0 F)
19992.2 C (36.0 F)
2000-1.1 C (30.0 F)
2001-1.7 C (28.9 F)
2002-9.4 C (15.1 F)
2003n/a
20050.6 C (33.1 F)
20061.1 C (34.0 F)
20070.6 C (33.1 F)
20080.6 C (33.1 F)
2009-0.6 C (30.9 F)
2010-2.8 C (27.0 F)
2011-5.6 C (21.9 F)
20123.3 C (37.9 F)
20138.9 C (48.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Port O'Connor by year The wettest day of the year at Port O'Connor, 1948 to 2013. The record is 317.5 mm (12.5 in) in 1976, marked on the chart; the median year is 88.4 mm (3.5 in). 0100200300400196019802000Record: 317.5 mm (12.5 in) in 1976
The wettest day of the year at Port O'Connor, 1948 to 2013. The record is 317.5 mm (12.5 in) in 1976, marked on the chart; the median year is 88.4 mm (3.5 in).
Wettest day (Rx1day) at Port O'Connor by year
YearWettest day (Rx1day)
1948134.1 mm (5.3 in)
1949141.0 mm (5.6 in)
195064.8 mm (2.6 in)
1951110.7 mm (4.4 in)
1952127.0 mm (5.0 in)
1953131.1 mm (5.2 in)
195476.5 mm (3.0 in)
195564.0 mm (2.5 in)
195688.4 mm (3.5 in)
1957196.9 mm (7.8 in)
195862.5 mm (2.5 in)
1959177.0 mm (7.0 in)
1960110.2 mm (4.3 in)
1961113.0 mm (4.4 in)
196278.7 mm (3.1 in)
196389.2 mm (3.5 in)
1964171.2 mm (6.7 in)
196560.2 mm (2.4 in)
1966120.7 mm (4.8 in)
1967128.3 mm (5.1 in)
196863.0 mm (2.5 in)
196973.7 mm (2.9 in)
197087.6 mm (3.4 in)
1971119.4 mm (4.7 in)
1972110.7 mm (4.4 in)
197394.0 mm (3.7 in)
1974102.9 mm (4.1 in)
1975112.3 mm (4.4 in)
1976317.5 mm (12.5 in)
1977123.7 mm (4.9 in)
197888.9 mm (3.5 in)
1979175.8 mm (6.9 in)
198052.3 mm (2.1 in)
1981120.9 mm (4.8 in)
1982101.1 mm (4.0 in)
198379.2 mm (3.1 in)
1984309.9 mm (12.2 in)
198550.8 mm (2.0 in)
198635.6 mm (1.4 in)
198784.3 mm (3.3 in)
198837.6 mm (1.5 in)
198963.5 mm (2.5 in)
199027.9 mm (1.1 in)
199348.3 mm (1.9 in)
199450.8 mm (2.0 in)
199563.5 mm (2.5 in)
1996207.0 mm (8.1 in)
199763.5 mm (2.5 in)
199882.6 mm (3.3 in)
199961.0 mm (2.4 in)
20000.0 mm (0.00 in)
2001102.9 mm (4.1 in)
20020.0 mm (0.00 in)
20030.0 mm (0.00 in)
200571.1 mm (2.8 in)
2006175.3 mm (6.9 in)
2007243.8 mm (9.6 in)
200880.3 mm (3.2 in)
2009114.3 mm (4.5 in)
201056.1 mm (2.2 in)
201151.6 mm (2.0 in)
2012101.6 mm (4.0 in)
20130.0 mm (0.00 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Port O'Connor by year The wettest five days of the year at Port O'Connor, 1948 to 2013. The record is 667.3 mm (26.3 in) in 2006, marked on the chart; the median year is 134.8 mm (5.3 in). 0200400600800196019802000Record: 667.3 mm (26.3 in) in 2006
The wettest five days of the year at Port O'Connor, 1948 to 2013. The record is 667.3 mm (26.3 in) in 2006, marked on the chart; the median year is 134.8 mm (5.3 in).
Wettest five days (Rx5day) at Port O'Connor by year
YearWettest five days (Rx5day)
1948167.9 mm (6.6 in)
1949278.2 mm (11.0 in)
195081.7 mm (3.2 in)
1951206.2 mm (8.1 in)
1952258.4 mm (10.2 in)
1953233.5 mm (9.2 in)
1954146.4 mm (5.8 in)
1955140.3 mm (5.5 in)
195699.6 mm (3.9 in)
1957284.3 mm (11.2 in)
1958153.4 mm (6.0 in)
1959194.5 mm (7.7 in)
1960209.1 mm (8.2 in)
1961222.0 mm (8.7 in)
1962100.1 mm (3.9 in)
1963107.7 mm (4.2 in)
1964185.4 mm (7.3 in)
1965114.3 mm (4.5 in)
1966175.2 mm (6.9 in)
1967224.8 mm (8.9 in)
1968149.9 mm (5.9 in)
1969103.9 mm (4.1 in)
197090.5 mm (3.6 in)
1971193.2 mm (7.6 in)
1972203.9 mm (8.0 in)
1973135.9 mm (5.4 in)
1974106.2 mm (4.2 in)
1975187.5 mm (7.4 in)
1976432.1 mm (17.0 in)
1977126.2 mm (5.0 in)
1978133.6 mm (5.3 in)
1979380.0 mm (15.0 in)
198098.8 mm (3.9 in)
1981159.3 mm (6.3 in)
1982128.3 mm (5.1 in)
1983263.9 mm (10.4 in)
1984350.8 mm (13.8 in)
1985101.6 mm (4.0 in)
198653.4 mm (2.1 in)
1987119.1 mm (4.7 in)
198837.6 mm (1.5 in)
1989114.3 mm (4.5 in)
199058.4 mm (2.3 in)
199351.5 mm (2.0 in)
1994119.4 mm (4.7 in)
199566.0 mm (2.6 in)
199635.6 mm (1.4 in)
199778.7 mm (3.1 in)
199885.1 mm (3.4 in)
199961.0 mm (2.4 in)
20000.0 mm (0.00 in)
2001108.5 mm (4.3 in)
20020.0 mm (0.00 in)
20030.0 mm (0.00 in)
2005106.7 mm (4.2 in)
2006667.3 mm (26.3 in)
2007308.6 mm (12.1 in)
2008172.9 mm (6.8 in)
2009153.2 mm (6.0 in)
2010170.6 mm (6.7 in)
201199.1 mm (3.9 in)
2012182.6 mm (7.2 in)
2013n/a

Longest dry spell (CDD)

Longest dry spell (CDD) at Port O'Connor by year The longest dry spell of the year at Port O'Connor, 1948 to 2013. The record is 175 days in 1996, marked on the chart; the median year is 33 days. 050100150200196019802000Record: 175 days in 1996
The longest dry spell of the year at Port O'Connor, 1948 to 2013. The record is 175 days in 1996, marked on the chart; the median year is 33 days.
Longest dry spell (CDD) at Port O'Connor by year
YearLongest dry spell (CDD)
194840 days
194922 days
195033 days
195128 days
195248 days
195340 days
195437 days
195528 days
195645 days
195721 days
195833 days
195926 days
196033 days
196126 days
196253 days
196339 days
196436 days
196532 days
196623 days
196719 days
196827 days
196973 days
197021 days
197132 days
197231 days
197324 days
197424 days
197525 days
197630 days
197728 days
197826 days
197931 days
198044 days
198129 days
198227 days
198346 days
198448 days
198554 days
19868 days
198748 days
198842 days
198961 days
199030 days
199313 days
199431 days
199594 days
1996175 days
199750 days
1998151 days
1999153 days
2000123 days
200135 days
200259 days
200392 days
200529 days
200623 days
200724 days
200835 days
200987 days
201035 days
201143 days
201218 days
20131 day

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.

Rainfall Return Levels

39 years, 1949 to 2011

A day with at least 95.7 mm (3.8 in) of rain is expected about once in 2 years. A day with at least 300.5 mm (11.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Port O'Connor: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years95.7 mm (3.8 in)
5 years136.8 mm (5.4 in)
10 years168.7 mm (6.6 in)
25 years215.6 mm (8.5 in)
50 years255.6 mm (10.1 in)Longer than the 39 years of record
100 years300.5 mm (11.8 in)Longer than the 39 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 39 years of values from 1949 to 2011.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 309.9 mm (12.2 in) in 1984; 196.9 mm (7.8 in) in 1957; 177.0 mm (7.0 in) in 1959.

Download the Data

  • Data for Port O'Connor standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Port O'Connor 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 (2025-12-31).