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Amealco Weather Records (MXN00022001)

Record envelope, standing records and threshold days for Amealco (MXN00022001), Mexico, with 68 years of record.

Key Facts for Amealco

  • Amealco (MXN00022001) is a weather station in Mexico at 20.18 latitude and -100.13 longitude, 2,629 m (8,625 ft) above sea level.
  • The station reports from 1944 to 2011, 68 years of record.
  • 1,464 records set at Amealco still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Amealco tied a daily record low minimum temperature of 1.7 C (35.1 F) on 29 October 2011.

About the Station

  • Location: Mexico, 20.18 latitude, -100.13 longitude.
  • Elevation: 2,629 m (8,625 ft).
  • Period of record: 1944 to 2011, 68 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 Amealco, with 2026 drawn through them The band shows the record high and record low for each calendar day at Amealco. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Amealco. 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 Amealco, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan30.0 C (86.0 F)-9.4 C (15.1 F)n/an/a
Feb32.8 C (91.0 F)-5.0 C (23.0 F)n/an/a
Mar36.7 C (98.1 F)-4.4 C (24.1 F)n/an/a
Apr32.8 C (91.0 F)-0.6 C (30.9 F)n/an/a
May37.8 C (100.0 F)0.0 C (32.0 F)n/an/a
Jun35.6 C (96.1 F)1.7 C (35.1 F)n/an/a
Jul30.6 C (87.1 F)1.7 C (35.1 F)n/an/a
Aug35.6 C (96.1 F)0.6 C (33.1 F)n/an/a
Sep31.7 C (89.1 F)0.0 C (32.0 F)n/an/a
Oct35.0 C (95.0 F)-8.3 C (17.1 F)n/an/a
Nov33.9 C (93.0 F)-6.1 C (21.0 F)n/an/a
Dec32.8 C (91.0 F)-4.4 C (24.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Amealco by the year they were set 1,464 records at Amealco still stand. 1982 holds the most, with 100. 02550751001944: 321945: 841946: 181947: 61948: 281949: 241950: 241951: 311952: 471953: 331954: 281955: 171956: 311957: 181958: 211959: 281960: 401961: 181962: 521963: 181964: 131965: 231966: 351967: 181968: 361969: 151970: 121971: 101972: 571973: 301974: 71975: 221976: 151977: 71978: 61979: 111980: 211981: 21982: 1001983: 901984: 91985: 151986: 561988: 101989: 371990: 231991: 181998: 261999: 152000: 592001: 92002: 62004: 32005: 32006: 22007: 172008: 92009: 182011: 11944195019561962196819741980198619992006
1,464 records at Amealco still stand. 1982 holds the most, with 100.
Standing records at Amealco by the year they were set
Year setStanding records
194432
194584
194618
19476
194828
194924
195024
195131
195247
195333
195428
195517
195631
195718
195821
195928
196040
196118
196252
196318
196413
196523
196635
196718
196836
196915
197012
197110
197257
197330
19747
197522
197615
19777
19786
197911
198021
19812
1982100
198390
19849
198515
198656
198810
198937
199023
199118
199826
199915
200059
20019
20026
20043
20053
20062
200717
20089
200918
20111

All-Time Record Progression

1 new records
When Amealco set new all-time records 1 all-time records were set at Amealco between 25 November 2000 and 25 November 2000. Each dot is a new record. Record high minimum temperature25 November 2000: Record high minimum temperature 19.4 C (66.9 F)2000
1 all-time records were set at Amealco between 25 November 2000 and 25 November 2000. Each dot is a new record.
When Amealco set new all-time records
DateKindDetail
2000-11-25Record high minimum temperatureRecord high minimum temperature 19.4 C (66.9 F)

Wettest Day of Each Month

Sep: 95.8 mm (3.8 in)
Record daily precipitation for each month at Amealco The wettest day on record for each calendar month at Amealco. The most was 95.8 mm (3.8 in) on 22 September 1965. 0255075100 Jan: 43.9 mm (1.7 in), 25 January 1980 Jan Feb: 77.0 mm (3.0 in), 3 February 2010 Feb Mar: 21.8 mm (0.9 in), 9 March 1966 Mar Apr: 62.0 mm (2.4 in), 29 April 1966 Apr May: 47.8 mm (1.9 in), 28 May 2006 May Jun: 66.8 mm (2.6 in), 11 June 1975 Jun Jul: 84.1 mm (3.3 in), 17 July 1983 Jul Aug: 74.4 mm (2.9 in), 28 August 2007 Aug Sep: 95.8 mm (3.8 in), 22 September 1965 Sep Oct: 62.0 mm (2.4 in), 6 October 2005 Oct Nov: 26.9 mm (1.1 in), 29 November 2007 Nov Dec: 36.8 mm (1.4 in), 1 December 1967 Dec
The wettest day on record for each calendar month at Amealco. The most was 95.8 mm (3.8 in) on 22 September 1965.
Record daily precipitation for each month at Amealco
MonthRecord daily precipitation (mm)Date
Jan43.9 mm (1.7 in)25 January 1980
Feb77.0 mm (3.0 in)3 February 2010
Mar21.8 mm (0.9 in)9 March 1966
Apr62.0 mm (2.4 in)29 April 1966
May47.8 mm (1.9 in)28 May 2006
Jun66.8 mm (2.6 in)11 June 1975
Jul84.1 mm (3.3 in)17 July 1983
Aug74.4 mm (2.9 in)28 August 2007
Sep95.8 mm (3.8 in)22 September 1965
Oct62.0 mm (2.4 in)6 October 2005
Nov26.9 mm (1.1 in)29 November 2007
Dec36.8 mm (1.4 in)1 December 1967

Period of Record Coverage

1944 to 2011
Days with data per year at Amealco 62 years of record at Amealco, 1944 to 2011. 20 years have data for under 90 percent of days and are left out of rankings: 1944, 1973, 1974, 1975, 1977, 1979, 1980, 1981 and others. 1944: 302 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 363 of 365 days1948: 362 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 362 of 365 days1952: 365 of 366 days1953: 361 of 365 days1954: 365 of 365 days1955: 363 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: 364 of 365 days1964: 365 of 366 days1965: 364 of 365 days1966: 365 of 365 days1967: 364 of 365 days1968: 358 of 366 days1969: 364 of 365 days1970: 363 of 365 days1971: 363 of 365 days1972: 365 of 366 days1973: 276 of 365 days1974: 304 of 365 days1975: 274 of 365 days1976: 365 of 366 days1977: 272 of 365 days1978: 361 of 365 days1979: 303 of 365 days1980: 244 of 366 days1981: 151 of 365 days1982: 324 of 365 days1983: 273 of 365 days1984: 153 of 366 days1985: 212 of 365 days1986: 364 of 365 days1988: 184 of 366 days1989: 334 of 365 days1990: 334 of 365 days1991: 90 of 365 days1997: 1 of 365 days1998: 130 of 365 days1999: 181 of 365 days2000: 331 of 366 days2001: 315 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 334 of 365 days2006: 274 of 365 days2007: 365 of 365 days2008: 336 of 366 days2009: 365 of 365 days2010: 335 of 365 days2011: 274 of 365 days1950196019701980199020002010
62 years of record at Amealco, 1944 to 2011. 20 years have data for under 90 percent of days and are left out of rankings: 1944, 1973, 1974, 1975, 1977, 1979, 1980, 1981 and others.
Days with data per year at Amealco
YearDays with dataShare of yearComplete
194430283%No
1945365100%Yes
1946365100%Yes
194736399%Yes
194836299%Yes
1949365100%Yes
1950365100%Yes
195136299%Yes
1952365100%Yes
195336199%Yes
1954365100%Yes
195536399%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963364100%Yes
1964365100%Yes
1965364100%Yes
1966365100%Yes
1967364100%Yes
196835898%Yes
1969364100%Yes
197036399%Yes
197136399%Yes
1972365100%Yes
197327676%No
197430483%No
197527475%No
1976365100%Yes
197727275%No
197836199%Yes
197930383%No
198024467%No
198115141%No
198232489%No
198327375%No
198415342%No
198521258%No
1986364100%Yes
198818450%No
198933492%Yes
199033492%Yes
19919025%No
199710%No
199813036%No
199918150%No
200033190%Yes
200131586%No
2002365100%Yes
2003365100%Yes
2004366100%Yes
200533492%Yes
200627475%No
2007365100%Yes
200833692%Yes
2009365100%Yes
201033592%Yes
201127475%No

Latest Records

20
Latest records at Amealco
DateStationRecordValueBeat old record byOld record stoodSignificance
29 October 2011Amealco, MXdaily low min (Tie)1.7 C (35.1 F)tie65 years6 of 100 (Routine)
31 August 2011Amealco, MXdaily rain36.8 mm (1.4 in)7.8 mm (0.31 in)52 years28 of 100 (Routine)
2 July 2011Amealco, MXdaily high max (Tie)26.7 C (80.1 F)tie58 years5 of 100 (Routine)
30 June 2011Amealco, MXdaily rain38.9 mm (1.5 in)0.5 mm (0.02 in)21 years12 of 100 (Routine)
29 January 2011Amealco, MXdaily high max26.7 C (80.1 F)1.1 C (2.0 F)56 years26 of 100 (Routine)
27 October 2010Amealco, MXdaily high max (Tie)26.7 C (80.1 F)tie59 years5 of 100 (Routine)
6 August 2010Amealco, MXdaily rain47.0 mm (1.9 in)7.1 mm (0.28 in)39 years24 of 100 (Routine)
4 August 2010Amealco, MXdaily high max (Tie)25.6 C (78.1 F)tie60 years6 of 100 (Routine)
23 July 2010Amealco, MXdaily rain (Tie)30.0 mm (1.2 in)tie5 years1 of 100 (Routine)
17 February 2010Amealco, MXdaily rain30.0 mm (1.2 in)19.1 mm (0.8 in)19 years43 of 100 (Notable)
3 February 2010Amealco, MXmonthly rain77.0 mm (3.0 in)12.2 mm (0.5 in)0 years36 of 100 (Notable)
2 February 2010Amealco, MXmonthly rain64.8 mm (2.6 in)34.3 mm (1.4 in)18 years61 of 100 (Major)
1 February 2010Amealco, MXdaily rain20.8 mm (0.8 in)16.0 mm (0.6 in)12 years20 of 100 (Routine)
7 January 2010Amealco, MXdaily rain18.8 mm (0.7 in)8.9 mm (0.35 in)44 years20 of 100 (Routine)
2 January 2010Amealco, MXdaily rain7.4 mm (0.29 in)2.1 mm (0.08 in)46 years20 of 100 (Routine)
30 October 2009Amealco, MXdaily high min13.9 C (57.0 F)3.3 C (5.9 F)55 years33 of 100 (Routine)
29 October 2009Amealco, MXdaily high min12.8 C (55.0 F)2.2 C (4.0 F)55 years29 of 100 (Routine)
27 October 2009Amealco, MXdaily high min12.8 C (55.0 F)2.2 C (4.0 F)20 years19 of 100 (Routine)
26 October 2009Amealco, MXdaily high min12.8 C (55.0 F)1.1 C (2.0 F)20 years15 of 100 (Routine)
25 October 2009Amealco, MXdaily high min11.7 C (53.1 F)1.7 C (3.1 F)23 years17 of 100 (Routine)

Climate Trend

36 complete years, 1945 to 2009
Annual mean temperature at Amealco as warming stripes, 1945 to 2009 One stripe for each of 36 complete years at Amealco, 1945 to 2009. Blue stripes are years cooler than the station's own mean of 14.9 C (58.8 F); red stripes are warmer. The coolest year was 1966, at 13.1 C (55.5 F), and the warmest was 1962, at 16.9 C (62.4 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1945: 14.5 C, -0.4 C from the station mean1946: 14.8 C, -0.1 C from the station mean1947: 15.0 C, +0.1 C from the station mean1948: 14.6 C, -0.3 C from the station mean1949: 14.3 C, -0.6 C from the station mean1950: 14.2 C, -0.7 C from the station mean1951: 14.6 C, -0.3 C from the station mean1952: 15.5 C, +0.7 C from the station mean1953: 16.0 C, +1.1 C from the station mean1954: 15.8 C, +0.9 C from the station mean1955: 15.2 C, +0.3 C from the station mean1956: 15.0 C, +0.1 C from the station mean1957: 15.8 C, +0.9 C from the station mean1958: 15.3 C, +0.4 C from the station mean1959: 16.0 C, +1.1 C from the station mean1960: 16.2 C, +1.3 C from the station mean1961: 15.5 C, +0.6 C from the station mean1962: 16.9 C, +2.0 C from the station mean1963: 14.5 C, -0.4 C from the station mean1964: 14.7 C, -0.2 C from the station mean1965: 13.6 C, -1.3 C from the station mean1966: 13.1 C, -1.8 C from the station mean1967: 13.2 C, -1.7 C from the station mean1968: 13.3 C, -1.6 C from the station mean1969: 13.9 C, -1.0 C from the station mean1970: 13.8 C, -1.1 C from the station mean1971: 13.8 C, -1.1 C from the station mean1972: 15.5 C, +0.6 C from the station mean1976: 14.4 C, -0.5 C from the station mean1978: 15.3 C, +0.4 C from the station mean1986: 16.0 C, +1.1 C from the station mean2002: 14.1 C, -0.8 C from the station mean2003: 14.5 C, -0.4 C from the station mean2004: 14.0 C, -0.9 C from the station mean2007: 16.6 C, +1.7 C from the station mean2009: 16.3 C, +1.4 C from the station mean1945195019601970198019902000
One stripe for each of 36 complete years at Amealco, 1945 to 2009. Blue stripes are years cooler than the station's own mean of 14.9 C (58.8 F); red stripes are warmer. The coolest year was 1966, at 13.1 C (55.5 F), and the warmest was 1962, at 16.9 C (62.4 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Amealco as warming stripes, 1945 to 2009
YearAnnual mean temperatureDifference from the station mean
194514.5 C-0.37 C
194614.8 C-0.05 C
194715.0 C+0.07 C
194814.6 C-0.25 C
194914.3 C-0.57 C
195014.2 C-0.69 C
195114.6 C-0.33 C
195215.5 C+0.66 C
195316.0 C+1.11 C
195415.8 C+0.90 C
195515.2 C+0.35 C
195615.0 C+0.13 C
195715.8 C+0.87 C
195815.3 C+0.41 C
195916.0 C+1.15 C
196016.2 C+1.30 C
196115.5 C+0.61 C
196216.9 C+2.03 C
196314.5 C-0.41 C
196414.7 C-0.18 C
196513.6 C-1.26 C
196613.1 C-1.81 C
196713.2 C-1.72 C
196813.3 C-1.58 C
196913.9 C-0.97 C
197013.8 C-1.08 C
197113.8 C-1.06 C
197215.5 C+0.59 C
197614.4 C-0.50 C
197815.3 C+0.45 C
198616.0 C+1.15 C
200214.1 C-0.81 C
200314.5 C-0.41 C
200414.0 C-0.89 C
200716.6 C+1.75 C
200916.3 C+1.44 C

The fitted trend in annual mean temperature here over 1945 to 2009 is 0.02 C (-0.17 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.30 to 0.39) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Amealco
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.02 C (-0.17 to 0.21) per decade0.04 F (-0.30 to 0.39) per decade1945 to 200936Not clearly different from zero
Mean daily maximum-0.1 C (-0.3 to 0.1) per decade-0.2 F (-0.6 to 0.2) per decade1945 to 200936Not clearly different from zero
Mean daily minimum0.2 C (-0.1 to 0.4) per decade0.3 F (-0.1 to 0.7) per decade1945 to 200936Not 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

1944 to 2011
Yearly extremes at Amealco: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.8 C (100.0 F)196830.6 C (87.1 F)62
Coldest night (TNn)-9.4 C (15.1 F)1956-0.6 C (30.9 F)61
Wettest day (Rx1day)95.8 mm (3.8 in)196542.2 mm (1.7 in)62
Wettest five days (Rx5day)191.9 mm (7.6 in)196598.6 mm (3.9 in)62
Longest dry spell (CDD)114 days195850 days62

Hottest day (TXx)

Hottest day (TXx) at Amealco by year The hottest day of the year at Amealco, 1944 to 2011. The record is 37.8 C (100.0 F) in 1968, marked on the chart; the median year is 30.6 C (87.1 F). 10203040196019802000Record: 37.8 C (100.0 F) in 1968
The hottest day of the year at Amealco, 1944 to 2011. The record is 37.8 C (100.0 F) in 1968, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at Amealco by year
YearHottest day (TXx)
194431.1 C (88.0 F)
194530.6 C (87.1 F)
194631.7 C (89.1 F)
194730.6 C (87.1 F)
194834.4 C (93.9 F)
194928.9 C (84.0 F)
195035.6 C (96.1 F)
195131.7 C (89.1 F)
195230.6 C (87.1 F)
195330.6 C (87.1 F)
195430.0 C (86.0 F)
195532.8 C (91.0 F)
195631.7 C (89.1 F)
195730.0 C (86.0 F)
195830.6 C (87.1 F)
195930.6 C (87.1 F)
196031.7 C (89.1 F)
196131.7 C (89.1 F)
196232.8 C (91.0 F)
196328.9 C (84.0 F)
196430.6 C (87.1 F)
196530.0 C (86.0 F)
196628.9 C (84.0 F)
196730.6 C (87.1 F)
196837.8 C (100.0 F)
196931.7 C (89.1 F)
197032.8 C (91.0 F)
197131.7 C (89.1 F)
197235.0 C (95.0 F)
197335.0 C (95.0 F)
197428.9 C (84.0 F)
197531.7 C (89.1 F)
197628.9 C (84.0 F)
197731.7 C (89.1 F)
197830.6 C (87.1 F)
197930.0 C (86.0 F)
198028.9 C (84.0 F)
198128.9 C (84.0 F)
198230.6 C (87.1 F)
198337.8 C (100.0 F)
198430.0 C (86.0 F)
198532.8 C (91.0 F)
198630.6 C (87.1 F)
198828.9 C (84.0 F)
198930.0 C (86.0 F)
199030.0 C (86.0 F)
199136.7 C (98.1 F)
199713.9 C (57.0 F)
199825.0 C (77.0 F)
199928.9 C (84.0 F)
200030.0 C (86.0 F)
200130.6 C (87.1 F)
200230.0 C (86.0 F)
200330.0 C (86.0 F)
200428.9 C (84.0 F)
200530.0 C (86.0 F)
200630.6 C (87.1 F)
200730.0 C (86.0 F)
200832.8 C (91.0 F)
200930.6 C (87.1 F)
201030.0 C (86.0 F)
201131.7 C (89.1 F)

Coldest night (TNn)

Coldest night (TNn) at Amealco by year The coldest night of the year at Amealco, 1944 to 2011. The record is -9.4 C (15.1 F) in 1956, marked on the chart; the median year is -0.6 C (30.9 F). -10-505196019802000Record: -9.4 C (15.1 F) in 1956
The coldest night of the year at Amealco, 1944 to 2011. The record is -9.4 C (15.1 F) in 1956, marked on the chart; the median year is -0.6 C (30.9 F).
Coldest night (TNn) at Amealco by year
YearColdest night (TNn)
1944-8.3 C (17.1 F)
1945-6.1 C (21.0 F)
1946-0.6 C (30.9 F)
1947-0.6 C (30.9 F)
1948-0.6 C (30.9 F)
1949-0.6 C (30.9 F)
1950-0.6 C (30.9 F)
1951-0.6 C (30.9 F)
1952-0.6 C (30.9 F)
19530.0 C (32.0 F)
19540.0 C (32.0 F)
1955-3.3 C (26.1 F)
1956-9.4 C (15.1 F)
1957-3.3 C (26.1 F)
1958-3.3 C (26.1 F)
19590.0 C (32.0 F)
1960-4.4 C (24.1 F)
1961-2.2 C (28.0 F)
1962-0.6 C (30.9 F)
1963-3.3 C (26.1 F)
1964-1.1 C (30.0 F)
19650.0 C (32.0 F)
1966-3.3 C (26.1 F)
1967-1.1 C (30.0 F)
1968-5.0 C (23.0 F)
19690.6 C (33.1 F)
1970-1.1 C (30.0 F)
1971-0.6 C (30.9 F)
1972-2.2 C (28.0 F)
1973-0.6 C (30.9 F)
19741.7 C (35.1 F)
1975-0.6 C (30.9 F)
1976-4.4 C (24.1 F)
19770.0 C (32.0 F)
1978-4.4 C (24.1 F)
19790.0 C (32.0 F)
1980-0.6 C (30.9 F)
19810.0 C (32.0 F)
19820.0 C (32.0 F)
19830.0 C (32.0 F)
19842.8 C (37.0 F)
19850.6 C (33.1 F)
1986-1.1 C (30.0 F)
19883.9 C (39.0 F)
19891.7 C (35.1 F)
19902.8 C (37.0 F)
19911.7 C (35.1 F)
1997n/a
1998-1.1 C (30.0 F)
1999-4.4 C (24.1 F)
20000.0 C (32.0 F)
20011.7 C (35.1 F)
2002-2.2 C (28.0 F)
20030.0 C (32.0 F)
20040.0 C (32.0 F)
20050.0 C (32.0 F)
20060.0 C (32.0 F)
20073.9 C (39.0 F)
20080.6 C (33.1 F)
20090.0 C (32.0 F)
20100.0 C (32.0 F)
20110.6 C (33.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Amealco by year The wettest day of the year at Amealco, 1944 to 2011. The record is 95.8 mm (3.8 in) in 1965, marked on the chart; the median year is 42.2 mm (1.7 in). 0255075100196019802000Record: 95.8 mm (3.8 in) in 1965
The wettest day of the year at Amealco, 1944 to 2011. The record is 95.8 mm (3.8 in) in 1965, marked on the chart; the median year is 42.2 mm (1.7 in).
Wettest day (Rx1day) at Amealco by year
YearWettest day (Rx1day)
194435.8 mm (1.4 in)
194527.9 mm (1.1 in)
194617.8 mm (0.7 in)
194715.7 mm (0.6 in)
194822.9 mm (0.9 in)
194916.0 mm (0.6 in)
195025.4 mm (1.0 in)
195119.1 mm (0.8 in)
195224.4 mm (1.0 in)
195323.4 mm (0.9 in)
195432.0 mm (1.3 in)
195525.1 mm (1.0 in)
195632.3 mm (1.3 in)
195721.1 mm (0.8 in)
195829.5 mm (1.2 in)
195918.0 mm (0.7 in)
196031.8 mm (1.3 in)
196115.5 mm (0.6 in)
196243.9 mm (1.7 in)
196347.0 mm (1.9 in)
196464.3 mm (2.5 in)
196595.8 mm (3.8 in)
196662.0 mm (2.4 in)
196789.9 mm (3.5 in)
196842.9 mm (1.7 in)
196959.9 mm (2.4 in)
197039.9 mm (1.6 in)
197146.5 mm (1.8 in)
197273.9 mm (2.9 in)
197329.5 mm (1.2 in)
197453.1 mm (2.1 in)
197566.8 mm (2.6 in)
197646.5 mm (1.8 in)
197727.9 mm (1.1 in)
197875.9 mm (3.0 in)
197966.8 mm (2.6 in)
198057.4 mm (2.3 in)
198141.4 mm (1.6 in)
198245.0 mm (1.8 in)
198384.1 mm (3.3 in)
198429.5 mm (1.2 in)
198555.1 mm (2.2 in)
198635.3 mm (1.4 in)
198825.9 mm (1.0 in)
198948.5 mm (1.9 in)
199053.1 mm (2.1 in)
199130.5 mm (1.2 in)
199724.9 mm (1.0 in)
19984.8 mm (0.19 in)
199938.4 mm (1.5 in)
200032.5 mm (1.3 in)
200149.8 mm (2.0 in)
200257.9 mm (2.3 in)
200358.9 mm (2.3 in)
200453.8 mm (2.1 in)
200562.0 mm (2.4 in)
200655.9 mm (2.2 in)
200774.4 mm (2.9 in)
200866.8 mm (2.6 in)
200971.9 mm (2.8 in)
201077.0 mm (3.0 in)
201140.9 mm (1.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Amealco by year The wettest five days of the year at Amealco, 1944 to 2011. The record is 191.9 mm (7.6 in) in 1965, marked on the chart; the median year is 98.6 mm (3.9 in). 050100150200196019802000Record: 191.9 mm (7.6 in) in 1965
The wettest five days of the year at Amealco, 1944 to 2011. The record is 191.9 mm (7.6 in) in 1965, marked on the chart; the median year is 98.6 mm (3.9 in).
Wettest five days (Rx5day) at Amealco by year
YearWettest five days (Rx5day)
194490.0 mm (3.5 in)
194561.3 mm (2.4 in)
194649.0 mm (1.9 in)
194735.6 mm (1.4 in)
194843.0 mm (1.7 in)
194923.9 mm (0.9 in)
195039.1 mm (1.5 in)
195149.6 mm (2.0 in)
195255.9 mm (2.2 in)
195365.5 mm (2.6 in)
195444.2 mm (1.7 in)
195541.4 mm (1.6 in)
195699.9 mm (3.9 in)
195746.9 mm (1.8 in)
195853.6 mm (2.1 in)
195942.3 mm (1.7 in)
196053.4 mm (2.1 in)
196160.2 mm (2.4 in)
1962158.0 mm (6.2 in)
1963105.2 mm (4.1 in)
1964145.8 mm (5.7 in)
1965191.9 mm (7.6 in)
196682.6 mm (3.3 in)
1967114.6 mm (4.5 in)
196897.3 mm (3.8 in)
1969128.1 mm (5.0 in)
1970157.8 mm (6.2 in)
1971158.0 mm (6.2 in)
1972186.1 mm (7.3 in)
197386.1 mm (3.4 in)
197483.1 mm (3.3 in)
1975127.7 mm (5.0 in)
1976121.1 mm (4.8 in)
197792.5 mm (3.6 in)
1978113.7 mm (4.5 in)
1979141.0 mm (5.6 in)
1980108.2 mm (4.3 in)
198186.1 mm (3.4 in)
198282.6 mm (3.3 in)
1983189.2 mm (7.4 in)
198471.4 mm (2.8 in)
1985102.4 mm (4.0 in)
1986100.9 mm (4.0 in)
198871.6 mm (2.8 in)
1989136.2 mm (5.4 in)
1990146.8 mm (5.8 in)
199130.5 mm (1.2 in)
199724.9 mm (1.0 in)
19988.6 mm (0.34 in)
1999111.2 mm (4.4 in)
200079.5 mm (3.1 in)
2001127.2 mm (5.0 in)
2002117.5 mm (4.6 in)
2003143.6 mm (5.7 in)
2004143.0 mm (5.6 in)
2005152.8 mm (6.0 in)
2006154.7 mm (6.1 in)
2007132.4 mm (5.2 in)
2008116.5 mm (4.6 in)
200989.5 mm (3.5 in)
2010179.4 mm (7.1 in)
2011118.0 mm (4.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Amealco by year The longest dry spell of the year at Amealco, 1944 to 2011. The record is 114 days in 1958, marked on the chart; the median year is 50 days. 0255075100125196019802000Record: 114 days in 1958
The longest dry spell of the year at Amealco, 1944 to 2011. The record is 114 days in 1958, marked on the chart; the median year is 50 days.
Longest dry spell (CDD) at Amealco by year
YearLongest dry spell (CDD)
194431 days
194592 days
194641 days
194773 days
1948108 days
194992 days
195071 days
195172 days
195230 days
195384 days
195440 days
195530 days
195666 days
195779 days
1958114 days
195931 days
196050 days
196192 days
196283 days
196354 days
196445 days
196541 days
196651 days
196729 days
196824 days
196938 days
197045 days
197158 days
197259 days
197346 days
197435 days
197538 days
197643 days
197732 days
197828 days
197939 days
198032 days
198133 days
198242 days
198368 days
198425 days
198583 days
1986102 days
198897 days
1989114 days
199080 days
199137 days
199716 days
199861 days
199933 days
200049 days
200159 days
200250 days
200359 days
200448 days
200532 days
200665 days
200730 days
200860 days
200975 days
201064 days
2011103 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

42 years, 1945 to 2010

A day with at least 41.7 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 111.2 mm (4.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Amealco: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years41.7 mm (1.6 in)
5 years62.3 mm (2.5 in)
10 years75.1 mm (3.0 in)
25 years90.4 mm (3.6 in)
50 years101.1 mm (4.0 in)Longer than the 42 years of record
100 years111.2 mm (4.4 in)Longer than the 42 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, 42 years of values from 1945 to 2010.

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: 95.8 mm (3.8 in) in 1965; 89.9 mm (3.5 in) in 1967; 77.0 mm (3.0 in) in 2010.

Download the Data

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