Built 2026-10-16 (16 October 2026)

Hool Weather Records (MXN00004012)

Record envelope, standing records and threshold days for Hool (MXN00004012), Mexico, with 50 years of record.

Key Facts for Hool

  • Hool (MXN00004012) is a weather station in Mexico at 19.50 latitude and -90.40 longitude, 25 m (82 ft) above sea level.
  • The station reports from 1962 to 2011, 50 years of record.
  • 1,464 records set at Hool still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Hool tied a daily record low maximum temperature of 26.7 C (80.1 F) on 27 November 2011.

About the Station

  • Location: Mexico, 19.50 latitude, -90.40 longitude.
  • Elevation: 25 m (82 ft).
  • Period of record: 1962 to 2011, 50 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Hool, with 2026 drawn through them The band shows the record high and record low for each calendar day at Hool. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Hool. 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 Hool, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan38.9 C (102.0 F)5.6 C (42.1 F)n/an/a
Feb39.4 C (102.9 F)5.6 C (42.1 F)n/an/a
Mar41.7 C (107.1 F)6.7 C (44.1 F)n/an/a
Apr43.9 C (111.0 F)8.9 C (48.0 F)n/an/a
May45.6 C (114.1 F)8.9 C (48.0 F)n/an/a
Jun41.7 C (107.1 F)10.6 C (51.1 F)n/an/a
Jul40.0 C (104.0 F)11.1 C (52.0 F)n/an/a
Aug40.0 C (104.0 F)10.0 C (50.0 F)n/an/a
Sep40.0 C (104.0 F)11.7 C (53.1 F)n/an/a
Oct39.4 C (102.9 F)10.0 C (50.0 F)n/an/a
Nov40.0 C (104.0 F)6.7 C (44.1 F)n/an/a
Dec39.4 C (102.9 F)5.6 C (42.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Hool by the year they were set 1,464 records at Hool still stand. 1982 holds the most, with 132. 0501001501962: 321963: 341964: 691965: 1141966: 631967: 141968: 141969: 171970: 331971: 331972: 151973: 391974: 591975: 211976: 201977: 311978: 301979: 131980: 311981: 461982: 1321983: 201984: 181985: 51986: 201987: 231988: 201989: 181990: 141991: 151992: 141993: 301994: 221995: 301996: 101997: 281998: 261999: 582000: 182001: 162002: 202003: 222004: 172005: 182006: 202007: 42008: 242009: 172010: 492011: 81962196719721977198219871992199720022007
1,464 records at Hool still stand. 1982 holds the most, with 132.
Standing records at Hool by the year they were set
Year setStanding records
196232
196334
196469
1965114
196663
196714
196814
196917
197033
197133
197215
197339
197459
197521
197620
197731
197830
197913
198031
198146
1982132
198320
198418
19855
198620
198723
198820
198918
199014
199115
199214
199330
199422
199530
199610
199728
199826
199958
200018
200116
200220
200322
200417
200518
200620
20074
200824
200917
201049
20118

All-Time Record Progression

3 new records
When Hool set new all-time records 3 all-time records were set at Hool between 22 December 1999 and 22 September 2002. Each dot is a new record. Record low maximum temperatureRecord high maximum temperatureRecord daily precipitation22 December 1999: Record low maximum temperature 18.9 C (66.0 F)3 May 2002: Record high maximum temperature 45.6 C (114.1 F)22 September 2002: Record daily precipitation 184.9 mm (7.3 in)2000
3 all-time records were set at Hool between 22 December 1999 and 22 September 2002. Each dot is a new record.
When Hool set new all-time records
DateKindDetail
1999-12-22Record low maximum temperatureRecord low maximum temperature 18.9 C (66.0 F)
2002-05-03Record high maximum temperatureRecord high maximum temperature 45.6 C (114.1 F)
2002-09-22Record daily precipitationRecord daily precipitation 184.9 mm (7.3 in)

Wettest Day of Each Month

Sep: 184.9 mm (7.3 in)
Record daily precipitation for each month at Hool The wettest day on record for each calendar month at Hool. The most was 184.9 mm (7.3 in) on 22 September 2002. 050100150200 Jan: 67.3 mm (2.6 in), 27 January 1967 Jan Feb: 105.4 mm (4.1 in), 9 February 2002 Feb Mar: 40.4 mm (1.6 in), 15 March 1978 Mar Apr: 80.8 mm (3.2 in), 23 April 1966 Apr May: 130.3 mm (5.1 in), 25 May 1988 May Jun: 115.3 mm (4.5 in), 27 June 2011 Jun Jul: 103.4 mm (4.1 in), 7 July 1983 Jul Aug: 140.5 mm (5.5 in), 3 August 2000 Aug Sep: 184.9 mm (7.3 in), 22 September 2002 Sep Oct: 156.5 mm (6.2 in), 1 October 1992 Oct Nov: 135.1 mm (5.3 in), 19 November 1984 Nov Dec: 134.4 mm (5.3 in), 2 December 1991 Dec
The wettest day on record for each calendar month at Hool. The most was 184.9 mm (7.3 in) on 22 September 2002.
Record daily precipitation for each month at Hool
MonthRecord daily precipitation (mm)Date
Jan67.3 mm (2.6 in)27 January 1967
Feb105.4 mm (4.1 in)9 February 2002
Mar40.4 mm (1.6 in)15 March 1978
Apr80.8 mm (3.2 in)23 April 1966
May130.3 mm (5.1 in)25 May 1988
Jun115.3 mm (4.5 in)27 June 2011
Jul103.4 mm (4.1 in)7 July 1983
Aug140.5 mm (5.5 in)3 August 2000
Sep184.9 mm (7.3 in)22 September 2002
Oct156.5 mm (6.2 in)1 October 1992
Nov135.1 mm (5.3 in)19 November 1984
Dec134.4 mm (5.3 in)2 December 1991

Period of Record Coverage

1962 to 2011
Days with data per year at Hool 50 years of record at Hool, 1962 to 2011. 7 years have data for under 90 percent of days and are left out of rankings: 1962, 1978, 1979, 1981, 1983, 1994, 1995. 1962: 214 of 365 days1963: 347 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 364 of 365 days1968: 366 of 366 days1969: 362 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 336 of 366 days1973: 335 of 365 days1974: 365 of 365 days1975: 334 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 303 of 365 days1979: 243 of 365 days1980: 336 of 366 days1981: 243 of 365 days1982: 334 of 365 days1983: 285 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 364 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 362 of 365 days1990: 365 of 365 days1991: 363 of 365 days1992: 361 of 366 days1993: 358 of 365 days1994: 243 of 365 days1995: 306 of 365 days1996: 365 of 366 days1997: 331 of 365 days1998: 363 of 365 days1999: 364 of 365 days2000: 362 of 366 days2001: 364 of 365 days2002: 364 of 365 days2003: 364 of 365 days2004: 366 of 366 days2005: 364 of 365 days2006: 365 of 365 days2007: 364 of 365 days2008: 363 of 366 days2009: 361 of 365 days2010: 331 of 365 days2011: 334 of 365 days19701980199020002010
50 years of record at Hool, 1962 to 2011. 7 years have data for under 90 percent of days and are left out of rankings: 1962, 1978, 1979, 1981, 1983, 1994, 1995.
Days with data per year at Hool
YearDays with dataShare of yearComplete
196221459%No
196334795%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967364100%Yes
1968366100%Yes
196936299%Yes
1970365100%Yes
1971365100%Yes
197233692%Yes
197333592%Yes
1974365100%Yes
197533492%Yes
1976366100%Yes
1977365100%Yes
197830383%No
197924367%No
198033692%Yes
198124367%No
198233492%Yes
198328578%No
1984366100%Yes
1985365100%Yes
1986364100%Yes
1987365100%Yes
1988366100%Yes
198936299%Yes
1990365100%Yes
199136399%Yes
199236199%Yes
199335898%Yes
199424367%No
199530684%No
1996365100%Yes
199733191%Yes
199836399%Yes
1999364100%Yes
200036299%Yes
2001364100%Yes
2002364100%Yes
2003364100%Yes
2004366100%Yes
2005364100%Yes
2006365100%Yes
2007364100%Yes
200836399%Yes
200936199%Yes
201033191%Yes
201133492%Yes

Latest Records

20
Latest records at Hool
DateStationRecordValueBeat old record byOld record stoodSignificance
27 November 2011Hool, MXdaily low max (Tie)26.7 C (80.1 F)tie20 years2 of 100 (Routine)
26 November 2011Hool, MXdaily rain8.4 mm (0.33 in)2.0 mm (0.08 in)38 years17 of 100 (Routine)
17 November 2011Hool, MXdaily rain15.5 mm (0.6 in)15.0 mm (0.6 in)33 years20 of 100 (Routine)
15 November 2011Hool, MXdaily low max (Tie)26.7 C (80.1 F)tie48 years4 of 100 (Routine)
1 November 2011Hool, MXdaily low max (Tie)23.9 C (75.0 F)tie12 years2 of 100 (Routine)
15 October 2011Hool, MXmonthly high min (Tie)25.0 C (77.0 F)tie46 years7 of 100 (Routine)
6 October 2011Hool, MXdaily low min (Tie)13.9 C (57.0 F)tie34 years3 of 100 (Routine)
6 October 2011Hool, MXdaily low max (Tie)26.7 C (80.1 F)tie5 years1 of 100 (Routine)
24 September 2011Hool, MXdaily rain80.3 mm (3.2 in)0.5 mm (0.02 in)8 years7 of 100 (Routine)
19 September 2011Hool, MXdaily low max27.8 C (82.0 F)0.5 C (0.9 F)17 years12 of 100 (Routine)
12 September 2011Hool, MXdaily low max (Tie)30.0 C (86.0 F)tie18 years2 of 100 (Routine)
11 September 2011Hool, MXdaily rain85.3 mm (3.4 in)54.8 mm (2.2 in)38 years42 of 100 (Notable)
22 August 2011Hool, MXdaily high min25.0 C (77.0 F)0.6 C (1.1 F)29 years15 of 100 (Routine)
6 August 2011Hool, MXdaily low max (Tie)27.8 C (82.0 F)tie9 years1 of 100 (Routine)
30 July 2011Hool, MXdaily low max (Tie)30.0 C (86.0 F)tie26 years3 of 100 (Routine)
29 July 2011Hool, MXdaily low min (Tie)17.2 C (63.0 F)tie12 years2 of 100 (Routine)
22 July 2011Hool, MXdaily low max27.8 C (82.0 F)2.8 C (5.0 F)48 years31 of 100 (Routine)
18 July 2011Hool, MXdaily low max28.9 C (84.0 F)1.1 C (2.0 F)16 years13 of 100 (Routine)
6 July 2011Hool, MXdaily rain54.9 mm (2.2 in)15.0 mm (0.6 in)45 years27 of 100 (Routine)
5 July 2011Hool, MXdaily low max28.9 C (84.0 F)1.1 C (2.0 F)36 years19 of 100 (Routine)

Climate Trend

34 complete years, 1964 to 2009
Annual mean temperature at Hool as warming stripes, 1964 to 2009 One stripe for each of 34 complete years at Hool, 1964 to 2009. Blue stripes are years cooler than the station's own mean of 26.0 C (78.7 F); red stripes are warmer. The coolest year was 1974, at 23.9 C (75.0 F), and the warmest was 1965, at 27.9 C (82.3 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1964: 27.9 C, +2.0 C from the station mean1965: 27.9 C, +2.0 C from the station mean1966: 26.9 C, +0.9 C from the station mean1967: 25.8 C, -0.2 C from the station mean1968: 25.5 C, -0.5 C from the station mean1969: 26.1 C, +0.1 C from the station mean1970: 26.0 C, +0.1 C from the station mean1971: 27.1 C, +1.1 C from the station mean1974: 23.9 C, -2.0 C from the station mean1976: 24.8 C, -1.2 C from the station mean1977: 25.5 C, -0.5 C from the station mean1984: 25.9 C, -0.1 C from the station mean1985: 26.5 C, +0.5 C from the station mean1986: 26.6 C, +0.6 C from the station mean1987: 26.1 C, +0.1 C from the station mean1988: 25.8 C, -0.2 C from the station mean1989: 25.8 C, -0.1 C from the station mean1990: 26.2 C, +0.2 C from the station mean1991: 25.8 C, -0.1 C from the station mean1992: 24.9 C, -1.0 C from the station mean1993: 25.1 C, -0.9 C from the station mean1996: 25.0 C, -1.0 C from the station mean1998: 26.1 C, +0.1 C from the station mean1999: 25.8 C, -0.1 C from the station mean2000: 25.1 C, -0.9 C from the station mean2001: 25.4 C, -0.5 C from the station mean2002: 26.3 C, +0.4 C from the station mean2003: 26.3 C, +0.3 C from the station mean2004: 26.5 C, +0.6 C from the station mean2005: 26.2 C, +0.2 C from the station mean2006: 25.7 C, -0.2 C from the station mean2007: 26.6 C, +0.7 C from the station mean2008: 26.2 C, +0.2 C from the station mean2009: 25.2 C, -0.7 C from the station mean196419701975198019851990199520002005
One stripe for each of 34 complete years at Hool, 1964 to 2009. Blue stripes are years cooler than the station's own mean of 26.0 C (78.7 F); red stripes are warmer. The coolest year was 1974, at 23.9 C (75.0 F), and the warmest was 1965, at 27.9 C (82.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Hool as warming stripes, 1964 to 2009
YearAnnual mean temperatureDifference from the station mean
196427.9 C+1.96 C
196527.9 C+1.99 C
196626.9 C+0.92 C
196725.8 C-0.20 C
196825.5 C-0.46 C
196926.1 C+0.13 C
197026.0 C+0.09 C
197127.1 C+1.10 C
197423.9 C-2.04 C
197624.8 C-1.15 C
197725.5 C-0.46 C
198425.9 C-0.07 C
198526.5 C+0.52 C
198626.6 C+0.62 C
198726.1 C+0.14 C
198825.8 C-0.15 C
198925.8 C-0.12 C
199026.2 C+0.21 C
199125.8 C-0.13 C
199224.9 C-1.03 C
199325.1 C-0.86 C
199625.0 C-1.00 C
199826.1 C+0.13 C
199925.8 C-0.14 C
200025.1 C-0.88 C
200125.4 C-0.53 C
200226.3 C+0.38 C
200326.3 C+0.32 C
200426.5 C+0.58 C
200526.2 C+0.23 C
200625.7 C-0.24 C
200726.6 C+0.66 C
200826.2 C+0.23 C
200925.2 C-0.73 C

The fitted trend in annual mean temperature here over 1964 to 2009 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.6 to 0.1) 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 Hool
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.1 C (-0.3 to 0.1) per decade-0.2 F (-0.6 to 0.1) per decade1964 to 200934Not clearly different from zero
Mean daily maximum0.01 C (-0.18 to 0.20) per decade0.01 F (-0.33 to 0.36) per decade1964 to 200934Not clearly different from zero
Mean daily minimum-0.26 C (-0.55 to 0.02) per decade-0.48 F (-0.98 to 0.03) per decade1964 to 200934Not 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

1962 to 2011
Yearly extremes at Hool: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.6 C (114.1 F)200241.1 C (106.0 F)50
Coldest night (TNn)5.6 C (42.1 F)19808.9 C (48.0 F)50
Wettest day (Rx1day)184.9 mm (7.3 in)200282.8 mm (3.3 in)50
Wettest five days (Rx5day)529.9 mm (20.9 in)2002162.3 mm (6.4 in)50
Longest dry spell (CDD)128 days197664 days50

Hottest day (TXx)

Hottest day (TXx) at Hool by year The hottest day of the year at Hool, 1962 to 2011. The record is 45.6 C (114.1 F) in 2002, marked on the chart; the median year is 41.1 C (106.0 F). 3537.54042.54547.519701980199020002010Record: 45.6 C (114.1 F) in 2002
The hottest day of the year at Hool, 1962 to 2011. The record is 45.6 C (114.1 F) in 2002, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Hool by year
YearHottest day (TXx)
196238.9 C (102.0 F)
196342.2 C (108.0 F)
196443.9 C (111.0 F)
196540.0 C (104.0 F)
196638.9 C (102.0 F)
196740.6 C (105.1 F)
196840.6 C (105.1 F)
196941.7 C (107.1 F)
197041.7 C (107.1 F)
197142.2 C (108.0 F)
197241.1 C (106.0 F)
197339.4 C (102.9 F)
197437.2 C (99.0 F)
197538.9 C (102.0 F)
197639.4 C (102.9 F)
197739.4 C (102.9 F)
197839.4 C (102.9 F)
197940.0 C (104.0 F)
198041.1 C (106.0 F)
198141.1 C (106.0 F)
198240.0 C (104.0 F)
198341.7 C (107.1 F)
198442.2 C (108.0 F)
198539.4 C (102.9 F)
198640.6 C (105.1 F)
198742.2 C (108.0 F)
198842.2 C (108.0 F)
198941.1 C (106.0 F)
199041.1 C (106.0 F)
199141.7 C (107.1 F)
199240.0 C (104.0 F)
199337.2 C (99.0 F)
199437.2 C (99.0 F)
199538.3 C (100.9 F)
199637.2 C (99.0 F)
199737.2 C (99.0 F)
199841.7 C (107.1 F)
199943.9 C (111.0 F)
200042.2 C (108.0 F)
200140.6 C (105.1 F)
200245.6 C (114.1 F)
200342.2 C (108.0 F)
200443.3 C (109.9 F)
200543.9 C (111.0 F)
200642.2 C (108.0 F)
200741.7 C (107.1 F)
200845.0 C (113.0 F)
200941.7 C (107.1 F)
201040.6 C (105.1 F)
201140.6 C (105.1 F)

Coldest night (TNn)

Coldest night (TNn) at Hool by year The coldest night of the year at Hool, 1962 to 2011. The record is 5.6 C (42.1 F) in 1980, marked on the chart; the median year is 8.9 C (48.0 F). 468101219701980199020002010Record: 5.6 C (42.1 F) in 1980
The coldest night of the year at Hool, 1962 to 2011. The record is 5.6 C (42.1 F) in 1980, marked on the chart; the median year is 8.9 C (48.0 F).
Coldest night (TNn) at Hool by year
YearColdest night (TNn)
196210.6 C (51.1 F)
19637.8 C (46.0 F)
196410.6 C (51.1 F)
196511.7 C (53.1 F)
196610.6 C (51.1 F)
196710.6 C (51.1 F)
196810.0 C (50.0 F)
196910.0 C (50.0 F)
197010.0 C (50.0 F)
19716.7 C (44.1 F)
19726.7 C (44.1 F)
19738.9 C (48.0 F)
19748.9 C (48.0 F)
197510.0 C (50.0 F)
197610.0 C (50.0 F)
19779.4 C (48.9 F)
197810.0 C (50.0 F)
19798.9 C (48.0 F)
19805.6 C (42.1 F)
198110.0 C (50.0 F)
19828.9 C (48.0 F)
19838.9 C (48.0 F)
19848.9 C (48.0 F)
19857.8 C (46.0 F)
19868.3 C (46.9 F)
19878.9 C (48.0 F)
19887.2 C (45.0 F)
19897.2 C (45.0 F)
19908.3 C (46.9 F)
19918.9 C (48.0 F)
19928.9 C (48.0 F)
199311.7 C (53.1 F)
19946.7 C (44.1 F)
199510.0 C (50.0 F)
19969.4 C (48.9 F)
19977.2 C (45.0 F)
19988.9 C (48.0 F)
19995.6 C (42.1 F)
20005.6 C (42.1 F)
20015.6 C (42.1 F)
20029.4 C (48.9 F)
20037.2 C (45.0 F)
20048.9 C (48.0 F)
20058.9 C (48.0 F)
20066.7 C (44.1 F)
200710.6 C (51.1 F)
20088.9 C (48.0 F)
20096.7 C (44.1 F)
20105.6 C (42.1 F)
20118.9 C (48.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Hool by year The wettest day of the year at Hool, 1962 to 2011. The record is 184.9 mm (7.3 in) in 2002, marked on the chart; the median year is 82.8 mm (3.3 in). 05010015020019701980199020002010Record: 184.9 mm (7.3 in) in 2002
The wettest day of the year at Hool, 1962 to 2011. The record is 184.9 mm (7.3 in) in 2002, marked on the chart; the median year is 82.8 mm (3.3 in).
Wettest day (Rx1day) at Hool by year
YearWettest day (Rx1day)
196253.8 mm (2.1 in)
196387.9 mm (3.5 in)
196479.8 mm (3.1 in)
196579.8 mm (3.1 in)
196693.0 mm (3.7 in)
196770.9 mm (2.8 in)
196864.8 mm (2.6 in)
196994.0 mm (3.7 in)
197075.4 mm (3.0 in)
197189.9 mm (3.5 in)
197260.5 mm (2.4 in)
197340.6 mm (1.6 in)
197469.3 mm (2.7 in)
197570.6 mm (2.8 in)
197662.2 mm (2.4 in)
197794.2 mm (3.7 in)
197879.8 mm (3.1 in)
197940.6 mm (1.6 in)
1980102.1 mm (4.0 in)
198120.6 mm (0.8 in)
198286.4 mm (3.4 in)
1983103.4 mm (4.1 in)
1984135.1 mm (5.3 in)
1985112.0 mm (4.4 in)
198657.4 mm (2.3 in)
198770.4 mm (2.8 in)
1988180.3 mm (7.1 in)
198986.4 mm (3.4 in)
199070.4 mm (2.8 in)
1991134.4 mm (5.3 in)
1992156.5 mm (6.2 in)
199360.5 mm (2.4 in)
199441.4 mm (1.6 in)
1995110.0 mm (4.3 in)
199665.3 mm (2.6 in)
199762.5 mm (2.5 in)
1998120.4 mm (4.7 in)
199980.3 mm (3.2 in)
2000140.5 mm (5.5 in)
200175.4 mm (3.0 in)
2002184.9 mm (7.3 in)
2003105.4 mm (4.1 in)
2004122.4 mm (4.8 in)
200588.4 mm (3.5 in)
2006104.4 mm (4.1 in)
200790.4 mm (3.6 in)
200880.3 mm (3.2 in)
200985.3 mm (3.4 in)
201075.4 mm (3.0 in)
2011115.3 mm (4.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Hool by year The wettest five days of the year at Hool, 1962 to 2011. The record is 529.9 mm (20.9 in) in 2002, marked on the chart; the median year is 162.3 mm (6.4 in). 020040060019701980199020002010Record: 529.9 mm (20.9 in) in 2002
The wettest five days of the year at Hool, 1962 to 2011. The record is 529.9 mm (20.9 in) in 2002, marked on the chart; the median year is 162.3 mm (6.4 in).
Wettest five days (Rx5day) at Hool by year
YearWettest five days (Rx5day)
1962107.6 mm (4.2 in)
1963195.6 mm (7.7 in)
1964115.1 mm (4.5 in)
1965114.6 mm (4.5 in)
1966233.5 mm (9.2 in)
1967120.7 mm (4.8 in)
1968141.5 mm (5.6 in)
1969150.5 mm (5.9 in)
1970111.0 mm (4.4 in)
1971224.5 mm (8.8 in)
1972221.9 mm (8.7 in)
1973146.6 mm (5.8 in)
1974264.1 mm (10.4 in)
1975172.8 mm (6.8 in)
1976172.5 mm (6.8 in)
1977298.4 mm (11.7 in)
1978190.8 mm (7.5 in)
197960.7 mm (2.4 in)
1980161.8 mm (6.4 in)
198131.3 mm (1.2 in)
1982162.7 mm (6.4 in)
1983138.2 mm (5.4 in)
1984188.5 mm (7.4 in)
1985214.7 mm (8.5 in)
1986105.5 mm (4.2 in)
1987141.4 mm (5.6 in)
1988215.9 mm (8.5 in)
1989150.9 mm (5.9 in)
1990111.5 mm (4.4 in)
1991141.0 mm (5.6 in)
1992200.0 mm (7.9 in)
1993214.3 mm (8.4 in)
1994102.3 mm (4.0 in)
1995367.6 mm (14.5 in)
1996154.5 mm (6.1 in)
1997115.6 mm (4.6 in)
1998164.8 mm (6.5 in)
1999181.4 mm (7.1 in)
2000200.5 mm (7.9 in)
2001109.0 mm (4.3 in)
2002529.9 mm (20.9 in)
2003120.4 mm (4.7 in)
2004154.1 mm (6.1 in)
2005165.3 mm (6.5 in)
2006169.9 mm (6.7 in)
2007102.3 mm (4.0 in)
2008141.0 mm (5.6 in)
2009211.1 mm (8.3 in)
2010216.0 mm (8.5 in)
2011246.2 mm (9.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Hool by year The longest dry spell of the year at Hool, 1962 to 2011. The record is 128 days in 1976, marked on the chart; the median year is 64 days. 25507510012515019701980199020002010Record: 128 days in 1976
The longest dry spell of the year at Hool, 1962 to 2011. The record is 128 days in 1976, marked on the chart; the median year is 64 days.
Longest dry spell (CDD) at Hool by year
YearLongest dry spell (CDD)
196261 days
196380 days
196435 days
196586 days
196636 days
196739 days
1968123 days
196990 days
1970127 days
197197 days
197252 days
197385 days
197464 days
1975124 days
1976128 days
197758 days
197847 days
1979128 days
198095 days
198150 days
198255 days
198357 days
198441 days
198565 days
198684 days
198738 days
198863 days
198934 days
199033 days
199161 days
199255 days
199360 days
199439 days
199530 days
199685 days
199771 days
1998120 days
199995 days
200071 days
200144 days
200274 days
200373 days
200458 days
200584 days
200658 days
200742 days
200871 days
200996 days
201036 days
201178 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.

Rainfall Return Levels

43 years, 1963 to 2011

A day with at least 84.9 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 209.3 mm (8.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Hool: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years84.9 mm (3.3 in)
5 years113.5 mm (4.5 in)
10 years134.1 mm (5.3 in)
25 years162.5 mm (6.4 in)
50 years185.2 mm (7.3 in)Longer than the 43 years of record
100 years209.3 mm (8.2 in)Longer than the 43 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, 43 years of values from 1963 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: 184.9 mm (7.3 in) in 2002; 180.3 mm (7.1 in) in 1988; 156.5 mm (6.2 in) in 1992.

Download the Data

  • Data for Hool standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Hool 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).