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Bolonchen Weather Records (MXN00004001)

Record envelope, standing records and threshold days for Bolonchen (MXN00004001), Mexico, with 59 years of record.

Key Facts for Bolonchen

  • Bolonchen (MXN00004001) is a weather station in Mexico at 20.00 latitude and -89.73 longitude, 120 m (393 ft) above sea level.
  • The station reports from 1953 to 2011, 59 years of record.
  • 1,464 records set at Bolonchen still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Bolonchen set a daily record precipitation of 46.5 mm (1.8 in) on 27 December 2011.

About the Station

  • Location: Mexico, 20.00 latitude, -89.73 longitude.
  • Elevation: 120 m (393 ft).
  • Period of record: 1953 to 2011, 59 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 Bolonchen, with 2026 drawn through them The band shows the record high and record low for each calendar day at Bolonchen. 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 Bolonchen. 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 Bolonchen, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan39.4 C (102.9 F)5.0 C (41.0 F)n/an/a
Feb38.9 C (102.0 F)5.0 C (41.0 F)n/an/a
Mar41.7 C (107.1 F)5.6 C (42.1 F)n/an/a
Apr42.8 C (109.0 F)10.0 C (50.0 F)n/an/a
May43.9 C (111.0 F)14.4 C (57.9 F)n/an/a
Jun40.0 C (104.0 F)15.6 C (60.1 F)n/an/a
Jul40.0 C (104.0 F)13.9 C (57.0 F)n/an/a
Aug38.9 C (102.0 F)18.9 C (66.0 F)n/an/a
Sep38.9 C (102.0 F)15.0 C (59.0 F)n/an/a
Oct37.2 C (99.0 F)10.6 C (51.1 F)n/an/a
Nov38.9 C (102.0 F)7.8 C (46.0 F)n/an/a
Dec36.7 C (98.1 F)5.0 C (41.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Bolonchen by the year they were set 1,464 records at Bolonchen still stand. 1953 holds the most, with 94. 02550751001953: 941954: 271955: 271956: 161957: 251958: 341959: 291960: 371961: 431962: 371963: 311964: 321965: 261966: 271967: 331968: 371969: 281970: 281971: 271972: 201973: 311974: 201975: 401976: 181977: 251978: 141979: 121980: 261981: 111982: 551983: 251984: 411985: 141986: 211987: 281988: 231989: 171990: 151991: 371992: 171993: 141994: 131995: 161996: 111997: 121998: 221999: 82000: 72001: 202002: 102003: 172004: 132005: 162006: 352007: 92008: 172009: 232010: 412011: 121953195919651971197719831989199520012007
1,464 records at Bolonchen still stand. 1953 holds the most, with 94.
Standing records at Bolonchen by the year they were set
Year setStanding records
195394
195427
195527
195616
195725
195834
195929
196037
196143
196237
196331
196432
196526
196627
196733
196837
196928
197028
197127
197220
197331
197420
197540
197618
197725
197814
197912
198026
198111
198255
198325
198441
198514
198621
198728
198823
198917
199015
199137
199217
199314
199413
199516
199611
199712
199822
19998
20007
200120
200210
200317
200413
200516
200635
20079
200817
200923
201041
201112

All-Time Record Progression

2 new records
When Bolonchen set new all-time records 2 all-time records were set at Bolonchen between 5 January 1984 and 27 January 1988. Each dot is a new record. Record low maximum temperature5 January 1984: Record low maximum temperature 16.7 C (62.1 F)27 January 1988: Record low maximum temperature 15.6 C (60.1 F)1985
2 all-time records were set at Bolonchen between 5 January 1984 and 27 January 1988. Each dot is a new record.
When Bolonchen set new all-time records
DateKindDetail
1984-01-05Record low maximum temperatureRecord low maximum temperature 16.7 C (62.1 F)
1988-01-27Record low maximum temperatureRecord low maximum temperature 15.6 C (60.1 F)

Wettest Day of Each Month

May: 210.3 mm (8.3 in)
Record daily precipitation for each month at Bolonchen The wettest day on record for each calendar month at Bolonchen. The most was 210.3 mm (8.3 in) on 15 May 1973. 0100200300 Jan: 110.0 mm (4.3 in), 11 January 2011 Jan Feb: 72.9 mm (2.9 in), 9 February 2008 Feb Mar: 51.8 mm (2.0 in), 28 March 1957 Mar Apr: 89.9 mm (3.5 in), 10 April 1959 Apr May: 210.3 mm (8.3 in), 15 May 1973 May Jun: 117.9 mm (4.6 in), 2 June 1994 Jun Jul: 79.8 mm (3.1 in), 17 July 1953 Jul Aug: 85.9 mm (3.4 in), 10 August 1998 Aug Sep: 184.9 mm (7.3 in), 23 September 2002 Sep Oct: 85.9 mm (3.4 in), 8 October 1976 Oct Nov: 81.8 mm (3.2 in), 20 November 1976 Nov Dec: 84.8 mm (3.3 in), 14 December 2006 Dec
The wettest day on record for each calendar month at Bolonchen. The most was 210.3 mm (8.3 in) on 15 May 1973.
Record daily precipitation for each month at Bolonchen
MonthRecord daily precipitation (mm)Date
Jan110.0 mm (4.3 in)11 January 2011
Feb72.9 mm (2.9 in)9 February 2008
Mar51.8 mm (2.0 in)28 March 1957
Apr89.9 mm (3.5 in)10 April 1959
May210.3 mm (8.3 in)15 May 1973
Jun117.9 mm (4.6 in)2 June 1994
Jul79.8 mm (3.1 in)17 July 1953
Aug85.9 mm (3.4 in)10 August 1998
Sep184.9 mm (7.3 in)23 September 2002
Oct85.9 mm (3.4 in)8 October 1976
Nov81.8 mm (3.2 in)20 November 1976
Dec84.8 mm (3.3 in)14 December 2006

Period of Record Coverage

1953 to 2011
Days with data per year at Bolonchen 59 years of record at Bolonchen, 1953 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1978, 1985, 1990, 1993, 1995. 1953: 365 of 365 days1954: 337 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 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: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 214 of 365 days1979: 334 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 303 of 365 days1986: 364 of 365 days1987: 365 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 319 of 365 days1991: 334 of 365 days1992: 366 of 366 days1993: 304 of 365 days1994: 365 of 365 days1995: 276 of 365 days1996: 336 of 366 days1997: 334 of 365 days1998: 335 of 365 days1999: 334 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 364 of 365 days2004: 365 of 366 days2005: 362 of 365 days2006: 362 of 365 days2007: 353 of 365 days2008: 361 of 366 days2009: 347 of 365 days2010: 363 of 365 days2011: 363 of 365 days196019701980199020002010
59 years of record at Bolonchen, 1953 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1978, 1985, 1990, 1993, 1995.
Days with data per year at Bolonchen
YearDays with dataShare of yearComplete
1953365100%Yes
195433792%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
197821459%No
197933492%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
198530383%No
1986364100%Yes
1987365100%Yes
1988365100%Yes
1989365100%Yes
199031987%No
199133492%Yes
1992366100%Yes
199330483%No
1994365100%Yes
199527676%No
199633692%Yes
199733492%Yes
199833592%Yes
199933492%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003364100%Yes
2004365100%Yes
200536299%Yes
200636299%Yes
200735397%Yes
200836199%Yes
200934795%Yes
201036399%Yes
201136399%Yes

Latest Records

20
Latest records at Bolonchen
DateStationRecordValueBeat old record byOld record stoodSignificance
27 December 2011Bolonchen, MXdaily rain46.5 mm (1.8 in)24.7 mm (1.0 in)20 years29 of 100 (Routine)
23 December 2011Bolonchen, MXdaily rain42.9 mm (1.7 in)39.1 mm (1.5 in)44 years46 of 100 (Notable)
11 December 2011Bolonchen, MXdaily low max21.7 C (71.1 F)1.1 C (2.0 F)44 years21 of 100 (Routine)
17 November 2011Bolonchen, MXdaily rain13.0 mm (0.5 in)2.1 mm (0.08 in)21 years12 of 100 (Routine)
16 November 2011Bolonchen, MXdaily high max (Tie)33.9 C (93.0 F)tie52 years5 of 100 (Routine)
21 October 2011Bolonchen, MXmonthly low max (Tie)22.8 C (73.0 F)tie16 years4 of 100 (Routine)
20 October 2011Bolonchen, MXdaily low max25.6 C (78.1 F)1.6 C (2.9 F)5 years13 of 100 (Routine)
19 October 2011Bolonchen, MXdaily low max25.0 C (77.0 F)0.6 C (1.1 F)13 years11 of 100 (Routine)
13 October 2011Bolonchen, MXdaily low max (Tie)25.0 C (77.0 F)tie33 years3 of 100 (Routine)
5 September 2011Bolonchen, MXdaily rain43.7 mm (1.7 in)15.8 mm (0.6 in)41 years25 of 100 (Routine)
24 August 2011Bolonchen, MXdaily rain62.0 mm (2.4 in)11.2 mm (0.4 in)13 years18 of 100 (Routine)
22 August 2011Bolonchen, MXdaily high min24.4 C (75.9 F)0.5 C (0.9 F)24 years16 of 100 (Routine)
12 August 2011Bolonchen, MXdaily high min (Tie)23.9 C (75.0 F)tie44 years4 of 100 (Routine)
11 August 2011Bolonchen, MXdaily high min (Tie)23.9 C (75.0 F)tie30 years3 of 100 (Routine)
10 August 2011Bolonchen, MXdaily high min (Tie)23.9 C (75.0 F)tie0 years1 of 100 (Routine)
7 August 2011Bolonchen, MXdaily high min (Tie)23.9 C (75.0 F)tie41 years4 of 100 (Routine)
30 July 2011Bolonchen, MXdaily rain56.4 mm (2.2 in)24.9 mm (1.0 in)26 years34 of 100 (Routine)
21 July 2011Bolonchen, MXdaily high min (Tie)22.8 C (73.0 F)tie45 years4 of 100 (Routine)
7 July 2011Bolonchen, MXdaily rain73.9 mm (2.9 in)28.9 mm (1.1 in)33 years39 of 100 (Notable)
1 July 2011Bolonchen, MXdaily high min (Tie)23.9 C (75.0 F)tie28 years3 of 100 (Routine)

Climate Trend

46 complete years, 1953 to 2011
Annual mean temperature at Bolonchen as warming stripes, 1953 to 2011 One stripe for each of 46 complete years at Bolonchen, 1953 to 2011. Blue stripes are years cooler than the station's own mean of 26.2 C (79.1 F); red stripes are warmer. The coolest year was 1984, at 25.1 C (77.1 F), and the warmest was 1975, at 26.9 C (80.4 F). The strongest colour marks a difference of 1.2 C (2.2 F). 1953: 25.9 C, -0.3 C from the station mean1955: 26.4 C, +0.2 C from the station mean1956: 25.9 C, -0.3 C from the station mean1957: 26.4 C, +0.2 C from the station mean1958: 26.4 C, +0.3 C from the station mean1959: 26.4 C, +0.2 C from the station mean1960: 26.6 C, +0.4 C from the station mean1961: 26.6 C, +0.4 C from the station mean1962: 26.6 C, +0.4 C from the station mean1963: 26.2 C, +0.1 C from the station mean1964: 26.5 C, +0.3 C from the station mean1965: 26.1 C, -0.1 C from the station mean1966: 25.6 C, -0.6 C from the station mean1967: 26.1 C, -0.1 C from the station mean1968: 25.8 C, -0.4 C from the station mean1969: 26.3 C, +0.1 C from the station mean1970: 26.2 C, 0.0 C from the station mean1971: 26.6 C, +0.4 C from the station mean1972: 26.5 C, +0.3 C from the station mean1973: 26.1 C, 0.0 C from the station mean1974: 25.7 C, -0.5 C from the station mean1975: 26.9 C, +0.7 C from the station mean1976: 25.8 C, -0.4 C from the station mean1977: 25.8 C, -0.4 C from the station mean1980: 26.0 C, -0.2 C from the station mean1981: 25.6 C, -0.6 C from the station mean1983: 26.0 C, -0.2 C from the station mean1984: 25.1 C, -1.1 C from the station mean1986: 26.5 C, +0.3 C from the station mean1987: 26.1 C, -0.1 C from the station mean1988: 26.0 C, -0.2 C from the station mean1989: 26.1 C, 0.0 C from the station mean1992: 25.7 C, -0.5 C from the station mean1994: 26.5 C, +0.3 C from the station mean2000: 26.4 C, +0.2 C from the station mean2001: 26.5 C, +0.3 C from the station mean2002: 26.3 C, +0.1 C from the station mean2003: 26.4 C, +0.2 C from the station mean2004: 26.3 C, +0.1 C from the station mean2005: 26.2 C, 0.0 C from the station mean2006: 25.8 C, -0.4 C from the station mean2007: 26.4 C, +0.3 C from the station mean2008: 26.0 C, -0.2 C from the station mean2009: 26.8 C, +0.6 C from the station mean2010: 26.1 C, -0.1 C from the station mean2011: 26.5 C, +0.3 C from the station mean195319601965197019751980198519901995200020052010
One stripe for each of 46 complete years at Bolonchen, 1953 to 2011. Blue stripes are years cooler than the station's own mean of 26.2 C (79.1 F); red stripes are warmer. The coolest year was 1984, at 25.1 C (77.1 F), and the warmest was 1975, at 26.9 C (80.4 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Bolonchen as warming stripes, 1953 to 2011
YearAnnual mean temperatureDifference from the station mean
195325.9 C-0.30 C
195526.4 C+0.24 C
195625.9 C-0.30 C
195726.4 C+0.20 C
195826.4 C+0.26 C
195926.4 C+0.24 C
196026.6 C+0.37 C
196126.6 C+0.40 C
196226.6 C+0.45 C
196326.2 C+0.06 C
196426.5 C+0.34 C
196526.1 C-0.13 C
196625.6 C-0.59 C
196726.1 C-0.07 C
196825.8 C-0.38 C
196926.3 C+0.10 C
197026.2 C+0.01 C
197126.6 C+0.43 C
197226.5 C+0.27 C
197326.1 C-0.04 C
197425.7 C-0.46 C
197526.9 C+0.73 C
197625.8 C-0.42 C
197725.8 C-0.37 C
198026.0 C-0.19 C
198125.6 C-0.62 C
198326.0 C-0.23 C
198425.1 C-1.10 C
198626.5 C+0.28 C
198726.1 C-0.13 C
198826.0 C-0.18 C
198926.1 C-0.04 C
199225.7 C-0.52 C
199426.5 C+0.34 C
200026.4 C+0.17 C
200126.5 C+0.28 C
200226.3 C+0.14 C
200326.4 C+0.23 C
200426.3 C+0.11 C
200526.2 C-0.03 C
200625.8 C-0.35 C
200726.4 C+0.26 C
200826.0 C-0.19 C
200926.8 C+0.61 C
201026.1 C-0.11 C
201126.5 C+0.32 C

The fitted trend in annual mean temperature here over 1953 to 2011 is 0.00 C (-0.06 to 0.06) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.11 to 0.11) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Bolonchen
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.00 C (-0.06 to 0.06) per decade0.00 F (-0.11 to 0.11) per decade1953 to 201146Not clearly different from zero
Mean daily maximum-0.12 C (-0.23 to -0.01) per decade-0.21 F (-0.41 to -0.01) per decade1953 to 201146Fall
Mean daily minimum0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.3) per decade1953 to 201146Rise

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

1953 to 2011
Yearly extremes at Bolonchen: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)196440.0 C (104.0 F)59
Coldest night (TNn)5.0 C (41.0 F)19638.3 C (46.9 F)59
Wettest day (Rx1day)210.3 mm (8.3 in)197371.9 mm (2.8 in)59
Wettest five days (Rx5day)627.6 mm (24.7 in)2002111.7 mm (4.4 in)59
Longest dry spell (CDD)115 days197148 days59

Hottest day (TXx)

Hottest day (TXx) at Bolonchen by year The hottest day of the year at Bolonchen, 1953 to 2011. The record is 43.9 C (111.0 F) in 1964, marked on the chart; the median year is 40.0 C (104.0 F). 3638404244196019701980199020002010Record: 43.9 C (111.0 F) in 1964
The hottest day of the year at Bolonchen, 1953 to 2011. The record is 43.9 C (111.0 F) in 1964, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Bolonchen by year
YearHottest day (TXx)
195342.2 C (108.0 F)
195438.9 C (102.0 F)
195540.0 C (104.0 F)
195638.9 C (102.0 F)
195741.7 C (107.1 F)
195841.7 C (107.1 F)
195938.3 C (100.9 F)
196038.9 C (102.0 F)
196138.9 C (102.0 F)
196240.0 C (104.0 F)
196340.0 C (104.0 F)
196443.9 C (111.0 F)
196540.0 C (104.0 F)
196638.3 C (100.9 F)
196740.6 C (105.1 F)
196840.6 C (105.1 F)
196940.0 C (104.0 F)
197040.6 C (105.1 F)
197141.7 C (107.1 F)
197240.0 C (104.0 F)
197340.6 C (105.1 F)
197438.9 C (102.0 F)
197542.2 C (108.0 F)
197637.8 C (100.0 F)
197738.9 C (102.0 F)
197838.9 C (102.0 F)
197940.0 C (104.0 F)
198040.6 C (105.1 F)
198140.0 C (104.0 F)
198240.6 C (105.1 F)
198339.4 C (102.9 F)
198440.6 C (105.1 F)
198538.9 C (102.0 F)
198640.6 C (105.1 F)
198740.6 C (105.1 F)
198840.6 C (105.1 F)
198937.8 C (100.0 F)
199038.9 C (102.0 F)
199140.6 C (105.1 F)
199238.9 C (102.0 F)
199337.8 C (100.0 F)
199437.8 C (100.0 F)
199540.0 C (104.0 F)
199637.8 C (100.0 F)
199738.9 C (102.0 F)
199840.0 C (104.0 F)
199940.0 C (104.0 F)
200040.0 C (104.0 F)
200140.0 C (104.0 F)
200240.0 C (104.0 F)
200340.0 C (104.0 F)
200438.3 C (100.9 F)
200540.0 C (104.0 F)
200641.7 C (107.1 F)
200740.0 C (104.0 F)
200840.0 C (104.0 F)
200940.6 C (105.1 F)
201041.1 C (106.0 F)
201140.6 C (105.1 F)

Coldest night (TNn)

Coldest night (TNn) at Bolonchen by year The coldest night of the year at Bolonchen, 1953 to 2011. The record is 5.0 C (41.0 F) in 1963, marked on the chart; the median year is 8.3 C (46.9 F). 468101214196019701980199020002010Record: 5.0 C (41.0 F) in 1963
The coldest night of the year at Bolonchen, 1953 to 2011. The record is 5.0 C (41.0 F) in 1963, marked on the chart; the median year is 8.3 C (46.9 F).
Coldest night (TNn) at Bolonchen by year
YearColdest night (TNn)
19537.8 C (46.0 F)
19547.2 C (45.0 F)
19558.9 C (48.0 F)
19566.7 C (44.1 F)
195710.0 C (50.0 F)
19588.9 C (48.0 F)
19598.3 C (46.9 F)
19607.8 C (46.0 F)
19618.9 C (48.0 F)
19627.8 C (46.0 F)
19635.0 C (41.0 F)
19647.8 C (46.0 F)
19655.6 C (42.1 F)
19667.8 C (46.0 F)
196710.0 C (50.0 F)
19685.6 C (42.1 F)
196910.0 C (50.0 F)
19708.9 C (48.0 F)
19715.0 C (41.0 F)
19727.8 C (46.0 F)
19736.7 C (44.1 F)
19747.8 C (46.0 F)
19757.8 C (46.0 F)
19767.8 C (46.0 F)
19775.0 C (41.0 F)
19785.0 C (41.0 F)
19797.8 C (46.0 F)
19805.6 C (42.1 F)
19815.0 C (41.0 F)
19825.6 C (42.1 F)
19839.4 C (48.9 F)
19848.9 C (48.0 F)
19858.9 C (48.0 F)
19866.1 C (43.0 F)
19878.9 C (48.0 F)
198810.0 C (50.0 F)
19898.9 C (48.0 F)
19908.9 C (48.0 F)
19918.9 C (48.0 F)
199210.6 C (51.1 F)
19938.3 C (46.9 F)
199410.0 C (50.0 F)
199510.0 C (50.0 F)
199610.0 C (50.0 F)
199712.8 C (55.0 F)
19989.4 C (48.9 F)
199910.0 C (50.0 F)
20008.3 C (46.9 F)
20018.9 C (48.0 F)
20027.2 C (45.0 F)
20038.9 C (48.0 F)
200410.0 C (50.0 F)
200510.0 C (50.0 F)
20066.1 C (43.0 F)
20077.8 C (46.0 F)
200810.6 C (51.1 F)
20097.8 C (46.0 F)
20106.7 C (44.1 F)
201110.6 C (51.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Bolonchen by year The wettest day of the year at Bolonchen, 1953 to 2011. The record is 210.3 mm (8.3 in) in 1973, marked on the chart; the median year is 71.9 mm (2.8 in). 050100150200250196019701980199020002010Record: 210.3 mm (8.3 in) in 1973
The wettest day of the year at Bolonchen, 1953 to 2011. The record is 210.3 mm (8.3 in) in 1973, marked on the chart; the median year is 71.9 mm (2.8 in).
Wettest day (Rx1day) at Bolonchen by year
YearWettest day (Rx1day)
195379.8 mm (3.1 in)
195475.2 mm (3.0 in)
195568.1 mm (2.7 in)
195657.9 mm (2.3 in)
195784.8 mm (3.3 in)
195845.5 mm (1.8 in)
195989.9 mm (3.5 in)
196057.9 mm (2.3 in)
196150.3 mm (2.0 in)
196219.8 mm (0.8 in)
196319.8 mm (0.8 in)
196419.8 mm (0.8 in)
196521.8 mm (0.9 in)
196619.8 mm (0.8 in)
196779.8 mm (3.1 in)
196869.9 mm (2.8 in)
196966.8 mm (2.6 in)
197074.9 mm (2.9 in)
197152.8 mm (2.1 in)
197279.8 mm (3.1 in)
1973210.3 mm (8.3 in)
1974159.8 mm (6.3 in)
197542.9 mm (1.7 in)
197685.9 mm (3.4 in)
197751.8 mm (2.0 in)
197871.9 mm (2.8 in)
197978.0 mm (3.1 in)
1980103.4 mm (4.1 in)
198177.5 mm (3.1 in)
198289.2 mm (3.5 in)
198385.1 mm (3.4 in)
198442.2 mm (1.7 in)
198564.8 mm (2.6 in)
198666.8 mm (2.6 in)
198789.9 mm (3.5 in)
1988169.9 mm (6.7 in)
198972.9 mm (2.9 in)
199061.0 mm (2.4 in)
199173.9 mm (2.9 in)
199254.9 mm (2.2 in)
199359.9 mm (2.4 in)
1994117.9 mm (4.6 in)
199548.8 mm (1.9 in)
199665.3 mm (2.6 in)
1997108.0 mm (4.3 in)
199885.9 mm (3.4 in)
199951.8 mm (2.0 in)
200045.5 mm (1.8 in)
200166.8 mm (2.6 in)
2002184.9 mm (7.3 in)
200386.9 mm (3.4 in)
200489.9 mm (3.5 in)
200589.9 mm (3.5 in)
200684.8 mm (3.3 in)
200759.9 mm (2.4 in)
200881.3 mm (3.2 in)
200961.0 mm (2.4 in)
201068.8 mm (2.7 in)
2011110.0 mm (4.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Bolonchen by year The wettest five days of the year at Bolonchen, 1953 to 2011. The record is 627.6 mm (24.7 in) in 2002, marked on the chart; the median year is 111.7 mm (4.4 in). 0200400600800196019701980199020002010Record: 627.6 mm (24.7 in) in 2002
The wettest five days of the year at Bolonchen, 1953 to 2011. The record is 627.6 mm (24.7 in) in 2002, marked on the chart; the median year is 111.7 mm (4.4 in).
Wettest five days (Rx5day) at Bolonchen by year
YearWettest five days (Rx5day)
1953140.9 mm (5.5 in)
1954110.8 mm (4.4 in)
1955166.7 mm (6.6 in)
1956102.7 mm (4.0 in)
1957141.8 mm (5.6 in)
1958111.7 mm (4.4 in)
1959158.0 mm (6.2 in)
196083.0 mm (3.3 in)
1961104.6 mm (4.1 in)
196241.4 mm (1.6 in)
196371.6 mm (2.8 in)
196472.4 mm (2.9 in)
196563.3 mm (2.5 in)
196662.5 mm (2.5 in)
1967134.4 mm (5.3 in)
1968100.9 mm (4.0 in)
1969131.0 mm (5.2 in)
1970139.0 mm (5.5 in)
197195.7 mm (3.8 in)
1972124.0 mm (4.9 in)
1973220.0 mm (8.7 in)
1974263.5 mm (10.4 in)
1975107.5 mm (4.2 in)
1976114.6 mm (4.5 in)
1977157.0 mm (6.2 in)
197895.6 mm (3.8 in)
1979132.5 mm (5.2 in)
1980168.3 mm (6.6 in)
1981128.1 mm (5.0 in)
1982149.6 mm (5.9 in)
1983164.8 mm (6.5 in)
1984144.1 mm (5.7 in)
1985100.4 mm (4.0 in)
198683.9 mm (3.3 in)
1987136.1 mm (5.4 in)
1988220.7 mm (8.7 in)
1989126.7 mm (5.0 in)
199061.0 mm (2.4 in)
1991104.7 mm (4.1 in)
199297.8 mm (3.9 in)
1993109.7 mm (4.3 in)
1994254.4 mm (10.0 in)
199593.7 mm (3.7 in)
199682.1 mm (3.2 in)
1997125.3 mm (4.9 in)
1998101.9 mm (4.0 in)
1999108.9 mm (4.3 in)
200085.4 mm (3.4 in)
2001114.8 mm (4.5 in)
2002627.6 mm (24.7 in)
200389.2 mm (3.5 in)
200492.4 mm (3.6 in)
2005146.0 mm (5.7 in)
2006147.9 mm (5.8 in)
200789.4 mm (3.5 in)
2008111.3 mm (4.4 in)
2009111.1 mm (4.4 in)
2010168.8 mm (6.6 in)
2011118.7 mm (4.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Bolonchen by year The longest dry spell of the year at Bolonchen, 1953 to 2011. The record is 115 days in 1971, marked on the chart; the median year is 48 days. 0255075100125196019701980199020002010Record: 115 days in 1971
The longest dry spell of the year at Bolonchen, 1953 to 2011. The record is 115 days in 1971, marked on the chart; the median year is 48 days.
Longest dry spell (CDD) at Bolonchen by year
YearLongest dry spell (CDD)
195382 days
195435 days
195545 days
195642 days
195723 days
195832 days
195932 days
196072 days
196139 days
196253 days
196361 days
196452 days
196546 days
196625 days
196740 days
196846 days
196972 days
197084 days
1971115 days
197240 days
197376 days
197440 days
197572 days
197658 days
197739 days
197819 days
197937 days
198043 days
198160 days
198226 days
198349 days
198445 days
198527 days
1986115 days
198761 days
198852 days
198943 days
199021 days
199163 days
199262 days
199328 days
199450 days
199550 days
199652 days
199737 days
199843 days
199990 days
200071 days
200157 days
200250 days
200373 days
200446 days
200555 days
200636 days
200733 days
200845 days
200964 days
201052 days
201148 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

54 years, 1953 to 2011

A day with at least 70.7 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 191.3 mm (7.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Bolonchen: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years70.7 mm (2.8 in)
5 years102.3 mm (4.0 in)
10 years123.5 mm (4.9 in)
25 years150.6 mm (5.9 in)
50 years170.9 mm (6.7 in)
100 years191.3 mm (7.5 in)Longer than the 54 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, 54 years of values from 1953 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: 210.3 mm (8.3 in) in 1973; 184.9 mm (7.3 in) in 2002; 169.9 mm (6.7 in) in 1988.

Download the Data

  • Data for Bolonchen standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Bolonchen 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). Records are computed by this site and are not official.

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