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Silacayoapam (Smn) Weather Records (MXN00020141)

Record envelope, standing records and threshold days for Silacayoapam (Smn) (MXN00020141), Mexico, with 59 years of record.

Key Facts for Silacayoapam (Smn)

  • Silacayoapam (Smn) (MXN00020141) is a weather station in Mexico at 17.50 latitude and -98.15 longitude, 1,675 m (5,495 ft) above sea level.
  • The station reports from 1942 to 2000, 59 years of record.
  • 1,464 records set at Silacayoapam (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Silacayoapam (Smn) set a daily record high minimum temperature of 15.0 C (59.0 F) on 28 November 2000.

About the Station

  • Location: Mexico, 17.50 latitude, -98.15 longitude.
  • Elevation: 1,675 m (5,495 ft).
  • Period of record: 1942 to 2000, 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 Silacayoapam (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Silacayoapam (Smn). 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 Silacayoapam (Smn). 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 Silacayoapam (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan37.8 C (100.0 F)0.0 C (32.0 F)n/an/a
Feb38.9 C (102.0 F)0.0 C (32.0 F)n/an/a
Mar43.9 C (111.0 F)1.7 C (35.1 F)n/an/a
Apr45.0 C (113.0 F)5.0 C (41.0 F)n/an/a
May46.7 C (116.1 F)5.6 C (42.1 F)n/an/a
Jun41.7 C (107.1 F)5.6 C (42.1 F)n/an/a
Jul41.7 C (107.1 F)0.6 C (33.1 F)n/an/a
Aug40.0 C (104.0 F)0.6 C (33.1 F)n/an/a
Sep37.8 C (100.0 F)0.6 C (33.1 F)n/an/a
Oct36.7 C (98.1 F)0.6 C (33.1 F)n/an/a
Nov36.7 C (98.1 F)0.6 C (33.1 F)n/an/a
Dec36.7 C (98.1 F)0.6 C (33.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Silacayoapam (Smn) by the year they were set 1,464 records at Silacayoapam (Smn) still stand. 1978 holds the most, with 167. 0501001502001957: 81958: 241959: 501960: 341961: 1381962: 881963: 351964: 531965: 151966: 11967: 41968: 61969: 11970: 61971: 61972: 81973: 11974: 191975: 151976: 121977: 131978: 1671979: 361980: 381981: 21982: 191983: 131984: 71985: 21986: 191987: 141988: 11992: 1331995: 971996: 971997: 1271998: 971999: 312000: 271957196119651969197319771981198519921998
1,464 records at Silacayoapam (Smn) still stand. 1978 holds the most, with 167.
Standing records at Silacayoapam (Smn) by the year they were set
Year setStanding records
19578
195824
195950
196034
1961138
196288
196335
196453
196515
19661
19674
19686
19691
19706
19716
19728
19731
197419
197515
197612
197713
1978167
197936
198038
19812
198219
198313
19847
19852
198619
198714
19881
1992133
199597
199697
1997127
199897
199931
200027

All-Time Record Progression

2 new records
When Silacayoapam (Smn) set new all-time records 2 all-time records were set at Silacayoapam (Smn) between 14 May 1995 and 26 December 1995. Each dot is a new record. Record high minimum temperatureRecord low maximum temperature14 May 1995: Record high minimum temperature 21.7 C (71.1 F)26 December 1995: Record low maximum temperature 15.0 C (59.0 F)1995
2 all-time records were set at Silacayoapam (Smn) between 14 May 1995 and 26 December 1995. Each dot is a new record.
When Silacayoapam (Smn) set new all-time records
DateKindDetail
1995-05-14Record high minimum temperatureRecord high minimum temperature 21.7 C (71.1 F)
1995-12-26Record low maximum temperatureRecord low maximum temperature 15.0 C (59.0 F)

Wettest Day of Each Month

Nov: 124.0 mm (4.9 in)
Record daily precipitation for each month at Silacayoapam (Smn) The wettest day on record for each calendar month at Silacayoapam (Smn). The most was 124.0 mm (4.9 in) on 3 November 1972. 050100150 Jan: 52.6 mm (2.1 in), 25 January 1980 Jan Feb: 28.4 mm (1.1 in), 25 February 1983 Feb Mar: 14.5 mm (0.6 in), 14 March 1995 Mar Apr: 68.1 mm (2.7 in), 28 April 1986 Apr May: 61.5 mm (2.4 in), 29 May 1987 May Jun: 74.2 mm (2.9 in), 28 June 1980 Jun Jul: 84.8 mm (3.3 in), 20 July 1961 Jul Aug: 88.9 mm (3.5 in), 11 August 1959 Aug Sep: 90.7 mm (3.6 in), 15 September 1998 Sep Oct: 74.9 mm (2.9 in), 13 October 1998 Oct Nov: 124.0 mm (4.9 in), 3 November 1972 Nov Dec: 25.7 mm (1.0 in), 9 December 1978 Dec
The wettest day on record for each calendar month at Silacayoapam (Smn). The most was 124.0 mm (4.9 in) on 3 November 1972.
Record daily precipitation for each month at Silacayoapam (Smn)
MonthRecord daily precipitation (mm)Date
Jan52.6 mm (2.1 in)25 January 1980
Feb28.4 mm (1.1 in)25 February 1983
Mar14.5 mm (0.6 in)14 March 1995
Apr68.1 mm (2.7 in)28 April 1986
May61.5 mm (2.4 in)29 May 1987
Jun74.2 mm (2.9 in)28 June 1980
Jul84.8 mm (3.3 in)20 July 1961
Aug88.9 mm (3.5 in)11 August 1959
Sep90.7 mm (3.6 in)15 September 1998
Oct74.9 mm (2.9 in)13 October 1998
Nov124.0 mm (4.9 in)3 November 1972
Dec25.7 mm (1.0 in)9 December 1978

Period of Record Coverage

1957 to 2000
Days with data per year at Silacayoapam (Smn) 39 years of record at Silacayoapam (Smn), 1957 to 2000. 2 years have data for under 90 percent of days and are left out of rankings: 1957, 1993. 1957: 303 of 365 days1958: 361 of 365 days1959: 332 of 365 days1960: 364 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 333 of 365 days1964: 363 of 366 days1965: 363 of 365 days1966: 361 of 365 days1967: 361 of 365 days1968: 364 of 366 days1969: 346 of 365 days1970: 362 of 365 days1971: 365 of 365 days1972: 364 of 366 days1973: 343 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 364 of 365 days1978: 363 of 365 days1979: 362 of 365 days1980: 365 of 366 days1981: 365 of 365 days1982: 364 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1993: 49 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 335 of 366 days19601965197019751980198519952000
39 years of record at Silacayoapam (Smn), 1957 to 2000. 2 years have data for under 90 percent of days and are left out of rankings: 1957, 1993.
Days with data per year at Silacayoapam (Smn)
YearDays with dataShare of yearComplete
195730383%No
195836199%Yes
195933291%Yes
196036499%Yes
1961365100%Yes
1962365100%Yes
196333391%Yes
196436399%Yes
196536399%Yes
196636199%Yes
196736199%Yes
196836499%Yes
196934695%Yes
197036299%Yes
1971365100%Yes
197236499%Yes
197334394%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977364100%Yes
197836399%Yes
197936299%Yes
1980365100%Yes
1981365100%Yes
1982364100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
19934913%No
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
200033592%Yes

Latest Records

20
Latest records at Silacayoapam (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
28 November 2000Silacayoapam (Smn), MXdaily high min15.0 C (59.0 F)0.6 C (1.1 F)3 years5 of 100 (Routine)
27 November 2000Silacayoapam (Smn), MXdaily high min15.0 C (59.0 F)1.1 C (2.0 F)37 years18 of 100 (Routine)
26 November 2000Silacayoapam (Smn), MXdaily high min16.1 C (61.0 F)1.1 C (2.0 F)17 years12 of 100 (Routine)
25 November 2000Silacayoapam (Smn), MXdaily high min (Tie)14.4 C (57.9 F)tie2 years1 of 100 (Routine)
16 November 2000Silacayoapam (Smn), MXdaily high min (Tie)14.4 C (57.9 F)tie3 years1 of 100 (Routine)
14 November 2000Silacayoapam (Smn), MXdaily high min (Tie)15.0 C (59.0 F)tie35 years3 of 100 (Routine)
13 November 2000Silacayoapam (Smn), MXdaily high min15.6 C (60.1 F)0.6 C (1.1 F)35 years15 of 100 (Routine)
12 November 2000Silacayoapam (Smn), MXdaily high min (Tie)15.0 C (59.0 F)tie5 years1 of 100 (Routine)
6 November 2000Silacayoapam (Smn), MXdaily high min16.1 C (61.0 F)0.5 C (0.9 F)37 years16 of 100 (Routine)
2 November 2000Silacayoapam (Smn), MXdaily high min (Tie)16.1 C (61.0 F)tie3 years1 of 100 (Routine)
16 October 2000Silacayoapam (Smn), MXdaily high min (Tie)16.1 C (61.0 F)tie2 years1 of 100 (Routine)
16 September 2000Silacayoapam (Smn), MXdaily rain39.4 mm (1.6 in)9.4 mm (0.37 in)32 years22 of 100 (Routine)
16 September 2000Silacayoapam (Smn), MXdaily high min (Tie)17.2 C (63.0 F)tie1 year1 of 100 (Routine)
15 September 2000Silacayoapam (Smn), MXdaily high min (Tie)17.2 C (63.0 F)tie4 years1 of 100 (Routine)
13 September 2000Silacayoapam (Smn), MXdaily high min (Tie)17.2 C (63.0 F)tie3 years1 of 100 (Routine)
10 September 2000Silacayoapam (Smn), MXdaily high min (Tie)17.2 C (63.0 F)tie3 years1 of 100 (Routine)
7 September 2000Silacayoapam (Smn), MXdaily low max (Tie)23.9 C (75.0 F)tie25 years2 of 100 (Routine)
25 July 2000Silacayoapam (Smn), MXdaily high min18.3 C (64.9 F)1.1 C (2.0 F)3 years7 of 100 (Routine)
19 July 2000Silacayoapam (Smn), MXdaily high min (Tie)17.2 C (63.0 F)tie3 years1 of 100 (Routine)
18 July 2000Silacayoapam (Smn), MXdaily high min (Tie)17.2 C (63.0 F)tie2 years1 of 100 (Routine)

Climate Trend

30 complete years, 1958 to 1999
Annual mean temperature at Silacayoapam (Smn) as warming stripes, 1958 to 1999 One stripe for each of 30 complete years at Silacayoapam (Smn), 1958 to 1999. Blue stripes are years cooler than the station's own mean of 20.8 C (69.5 F); red stripes are warmer. The coolest year was 1961, at 18.2 C (64.7 F), and the warmest was 1978, at 23.7 C (74.7 F). The strongest colour marks a difference of 2.9 C (5.2 F). 1958: 21.0 C, +0.1 C from the station mean1961: 18.2 C, -2.7 C from the station mean1962: 18.9 C, -1.9 C from the station mean1964: 22.1 C, +1.3 C from the station mean1965: 21.9 C, +1.1 C from the station mean1966: 21.3 C, +0.5 C from the station mean1967: 20.9 C, 0.0 C from the station mean1968: 20.7 C, -0.1 C from the station mean1970: 21.1 C, +0.3 C from the station mean1971: 20.4 C, -0.5 C from the station mean1972: 20.5 C, -0.3 C from the station mean1975: 19.9 C, -0.9 C from the station mean1976: 19.8 C, -1.0 C from the station mean1977: 19.9 C, -0.9 C from the station mean1978: 23.7 C, +2.9 C from the station mean1979: 23.3 C, +2.5 C from the station mean1980: 23.1 C, +2.2 C from the station mean1981: 22.3 C, +1.4 C from the station mean1982: 22.0 C, +1.2 C from the station mean1983: 21.2 C, +0.3 C from the station mean1984: 20.0 C, -0.9 C from the station mean1985: 20.1 C, -0.7 C from the station mean1986: 19.3 C, -1.5 C from the station mean1987: 20.0 C, -0.8 C from the station mean1988: 20.6 C, -0.3 C from the station mean1995: 20.6 C, -0.2 C from the station mean1996: 19.9 C, -0.9 C from the station mean1997: 20.4 C, -0.4 C from the station mean1998: 21.7 C, +0.9 C from the station mean1999: 20.5 C, -0.3 C from the station mean19581965197019751980198519901995
One stripe for each of 30 complete years at Silacayoapam (Smn), 1958 to 1999. Blue stripes are years cooler than the station's own mean of 20.8 C (69.5 F); red stripes are warmer. The coolest year was 1961, at 18.2 C (64.7 F), and the warmest was 1978, at 23.7 C (74.7 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Silacayoapam (Smn) as warming stripes, 1958 to 1999
YearAnnual mean temperatureDifference from the station mean
195821.0 C+0.14 C
196118.2 C-2.69 C
196218.9 C-1.95 C
196422.1 C+1.27 C
196521.9 C+1.05 C
196621.3 C+0.49 C
196720.9 C+0.01 C
196820.7 C-0.11 C
197021.1 C+0.25 C
197120.4 C-0.46 C
197220.5 C-0.35 C
197519.9 C-0.95 C
197619.8 C-1.01 C
197719.9 C-0.93 C
197823.7 C+2.87 C
197923.3 C+2.45 C
198023.1 C+2.20 C
198122.3 C+1.42 C
198222.0 C+1.17 C
198321.2 C+0.30 C
198420.0 C-0.89 C
198520.1 C-0.71 C
198619.3 C-1.54 C
198720.0 C-0.83 C
198820.6 C-0.27 C
199520.6 C-0.24 C
199619.9 C-0.94 C
199720.4 C-0.44 C
199821.7 C+0.88 C
199920.5 C-0.33 C

The fitted trend in annual mean temperature here over 1958 to 1999 is 0.03 C (-0.38 to 0.45) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.7 to 0.8) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Silacayoapam (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.03 C (-0.38 to 0.45) per decade0.1 F (-0.7 to 0.8) per decade1958 to 199930Not clearly different from zero
Mean daily maximum-0.9 C (-1.6 to -0.2) per decade-1.7 F (-3.0 to -0.4) per decade1958 to 199930Fall
Mean daily minimum1.0 C (0.4 to 1.5) per decade1.8 F (0.8 to 2.8) per decade1958 to 199930Rise

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

1942 to 2000
Yearly extremes at Silacayoapam (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.7 C (116.1 F)197835.6 C (96.1 F)39
Coldest night (TNn)0.0 C (32.0 F)19863.9 C (39.0 F)40
Wettest day (Rx1day)124.0 mm (4.9 in)197241.9 mm (1.6 in)51
Wettest five days (Rx5day)304.3 mm (12.0 in)195999.0 mm (3.9 in)51
Longest dry spell (CDD)139 days198861 days51

Hottest day (TXx)

Hottest day (TXx) at Silacayoapam (Smn) by year The hottest day of the year at Silacayoapam (Smn), 1942 to 2000. The record is 46.7 C (116.1 F) in 1978, marked on the chart; the median year is 35.6 C (96.1 F). 3035404550195019601970198019902000Record: 46.7 C (116.1 F) in 1978
The hottest day of the year at Silacayoapam (Smn), 1942 to 2000. The record is 46.7 C (116.1 F) in 1978, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Silacayoapam (Smn) by year
YearHottest day (TXx)
1942n/a
1943n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
195732.8 C (91.0 F)
195835.6 C (96.1 F)
195935.6 C (96.1 F)
196035.6 C (96.1 F)
196136.7 C (98.1 F)
196236.7 C (98.1 F)
196337.8 C (100.0 F)
196437.8 C (100.0 F)
196538.9 C (102.0 F)
196636.7 C (98.1 F)
196735.0 C (95.0 F)
196835.0 C (95.0 F)
196935.6 C (96.1 F)
197035.6 C (96.1 F)
197135.6 C (96.1 F)
197235.6 C (96.1 F)
197337.8 C (100.0 F)
197435.0 C (95.0 F)
197536.7 C (98.1 F)
197635.6 C (96.1 F)
197735.6 C (96.1 F)
197846.7 C (116.1 F)
197945.6 C (114.1 F)
198042.8 C (109.0 F)
198141.7 C (107.1 F)
198240.6 C (105.1 F)
198340.0 C (104.0 F)
198440.0 C (104.0 F)
198538.9 C (102.0 F)
198637.8 C (100.0 F)
198737.8 C (100.0 F)
198835.6 C (96.1 F)
1992n/a
199330.6 C (87.1 F)
199535.0 C (95.0 F)
199631.7 C (89.1 F)
199731.7 C (89.1 F)
199837.2 C (99.0 F)
199935.0 C (95.0 F)
200033.9 C (93.0 F)

Coldest night (TNn)

Coldest night (TNn) at Silacayoapam (Smn) by year The coldest night of the year at Silacayoapam (Smn), 1942 to 2000. The record is 0.0 C (32.0 F) in 1986, marked on the chart; the median year is 3.9 C (39.0 F). 02.557.510195019601970198019902000Record: 0.0 C (32.0 F) in 1986
The coldest night of the year at Silacayoapam (Smn), 1942 to 2000. The record is 0.0 C (32.0 F) in 1986, marked on the chart; the median year is 3.9 C (39.0 F).
Coldest night (TNn) at Silacayoapam (Smn) by year
YearColdest night (TNn)
1942n/a
1943n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
19572.8 C (37.0 F)
19583.9 C (39.0 F)
19596.7 C (44.1 F)
19605.6 C (42.1 F)
19612.8 C (37.0 F)
19625.6 C (42.1 F)
19635.6 C (42.1 F)
19646.7 C (44.1 F)
19655.0 C (41.0 F)
19665.0 C (41.0 F)
19672.8 C (37.0 F)
19682.8 C (37.0 F)
19695.0 C (41.0 F)
19702.8 C (37.0 F)
19712.8 C (37.0 F)
19721.7 C (35.1 F)
19733.9 C (39.0 F)
19745.0 C (41.0 F)
19753.9 C (39.0 F)
19763.9 C (39.0 F)
19773.9 C (39.0 F)
19785.0 C (41.0 F)
19792.8 C (37.0 F)
19803.9 C (39.0 F)
19813.9 C (39.0 F)
19821.7 C (35.1 F)
19831.7 C (35.1 F)
19842.8 C (37.0 F)
19855.0 C (41.0 F)
19860.0 C (32.0 F)
19870.0 C (32.0 F)
19880.6 C (33.1 F)
19920.6 C (33.1 F)
19938.9 C (48.0 F)
19956.1 C (43.0 F)
19966.7 C (44.1 F)
199710.0 C (50.0 F)
19988.3 C (46.9 F)
19995.0 C (41.0 F)
20007.2 C (45.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Silacayoapam (Smn) by year The wettest day of the year at Silacayoapam (Smn), 1942 to 2000. The record is 124.0 mm (4.9 in) in 1972, marked on the chart; the median year is 41.9 mm (1.6 in). 050100150195019601970198019902000Record: 124.0 mm (4.9 in) in 1972
The wettest day of the year at Silacayoapam (Smn), 1942 to 2000. The record is 124.0 mm (4.9 in) in 1972, marked on the chart; the median year is 41.9 mm (1.6 in).
Wettest day (Rx1day) at Silacayoapam (Smn) by year
YearWettest day (Rx1day)
194228.2 mm (1.1 in)
194320.8 mm (0.8 in)
194820.8 mm (0.8 in)
194943.9 mm (1.7 in)
195030.0 mm (1.2 in)
195127.9 mm (1.1 in)
195241.4 mm (1.6 in)
195339.9 mm (1.6 in)
195435.8 mm (1.4 in)
195547.0 mm (1.9 in)
195634.8 mm (1.4 in)
195719.8 mm (0.8 in)
195830.0 mm (1.2 in)
195988.9 mm (3.5 in)
196034.8 mm (1.4 in)
196184.8 mm (3.3 in)
196232.8 mm (1.3 in)
196362.0 mm (2.4 in)
196447.0 mm (1.9 in)
196548.8 mm (1.9 in)
196649.8 mm (2.0 in)
196767.8 mm (2.7 in)
196843.9 mm (1.7 in)
196954.9 mm (2.2 in)
197064.8 mm (2.6 in)
197141.9 mm (1.6 in)
1972124.0 mm (4.9 in)
197333.3 mm (1.3 in)
197428.2 mm (1.1 in)
197533.5 mm (1.3 in)
197664.5 mm (2.5 in)
197765.8 mm (2.6 in)
197839.9 mm (1.6 in)
197943.7 mm (1.7 in)
198074.2 mm (2.9 in)
198141.1 mm (1.6 in)
198251.3 mm (2.0 in)
198362.5 mm (2.5 in)
198439.1 mm (1.5 in)
198526.2 mm (1.0 in)
198668.1 mm (2.7 in)
198787.1 mm (3.4 in)
198838.6 mm (1.5 in)
199235.8 mm (1.4 in)
19934.3 mm (0.17 in)
199541.9 mm (1.6 in)
199650.0 mm (2.0 in)
199728.2 mm (1.1 in)
199890.7 mm (3.6 in)
199955.9 mm (2.2 in)
200043.4 mm (1.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Silacayoapam (Smn) by year The wettest five days of the year at Silacayoapam (Smn), 1942 to 2000. The record is 304.3 mm (12.0 in) in 1959, marked on the chart; the median year is 99.0 mm (3.9 in). 0100200300400195019601970198019902000Record: 304.3 mm (12.0 in) in 1959
The wettest five days of the year at Silacayoapam (Smn), 1942 to 2000. The record is 304.3 mm (12.0 in) in 1959, marked on the chart; the median year is 99.0 mm (3.9 in).
Wettest five days (Rx5day) at Silacayoapam (Smn) by year
YearWettest five days (Rx5day)
194276.0 mm (3.0 in)
194362.5 mm (2.5 in)
194862.5 mm (2.5 in)
1949100.5 mm (4.0 in)
195073.4 mm (2.9 in)
195174.4 mm (2.9 in)
1952134.7 mm (5.3 in)
1953105.6 mm (4.2 in)
195479.0 mm (3.1 in)
1955129.3 mm (5.1 in)
195676.2 mm (3.0 in)
195754.3 mm (2.1 in)
1958109.5 mm (4.3 in)
1959304.3 mm (12.0 in)
196075.4 mm (3.0 in)
1961168.4 mm (6.6 in)
196297.5 mm (3.8 in)
1963115.3 mm (4.5 in)
196493.5 mm (3.7 in)
1965108.1 mm (4.3 in)
1966123.5 mm (4.9 in)
196799.0 mm (3.9 in)
196894.5 mm (3.7 in)
1969163.6 mm (6.4 in)
1970102.4 mm (4.0 in)
1971115.6 mm (4.6 in)
1972126.5 mm (5.0 in)
197391.2 mm (3.6 in)
1974104.9 mm (4.1 in)
197575.5 mm (3.0 in)
1976194.4 mm (7.7 in)
1977143.6 mm (5.7 in)
197883.8 mm (3.3 in)
197999.6 mm (3.9 in)
1980128.6 mm (5.1 in)
198182.9 mm (3.3 in)
1982149.1 mm (5.9 in)
198384.7 mm (3.3 in)
198466.9 mm (2.6 in)
198578.9 mm (3.1 in)
198692.5 mm (3.6 in)
1987193.8 mm (7.6 in)
198872.9 mm (2.9 in)
199271.6 mm (2.8 in)
19934.3 mm (0.17 in)
199575.5 mm (3.0 in)
1996142.2 mm (5.6 in)
199781.4 mm (3.2 in)
1998157.5 mm (6.2 in)
1999105.4 mm (4.1 in)
200099.9 mm (3.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Silacayoapam (Smn) by year The longest dry spell of the year at Silacayoapam (Smn), 1942 to 2000. The record is 139 days in 1988, marked on the chart; the median year is 61 days. 050100150195019601970198019902000Record: 139 days in 1988
The longest dry spell of the year at Silacayoapam (Smn), 1942 to 2000. The record is 139 days in 1988, marked on the chart; the median year is 61 days.
Longest dry spell (CDD) at Silacayoapam (Smn) by year
YearLongest dry spell (CDD)
194218 days
194373 days
194861 days
194947 days
195030 days
1951123 days
1952100 days
195389 days
195437 days
195558 days
1956124 days
195743 days
195861 days
195935 days
196066 days
196140 days
196245 days
196378 days
196465 days
196543 days
196661 days
196729 days
196842 days
196976 days
197095 days
197191 days
197281 days
197357 days
197498 days
197598 days
197690 days
197743 days
197843 days
197947 days
198091 days
198159 days
198281 days
198352 days
198463 days
198547 days
198654 days
198791 days
1988139 days
199219 days
199312 days
199540 days
1996120 days
199777 days
1998113 days
199976 days
200070 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

45 years, 1949 to 2000

A day with at least 44.4 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 125.3 mm (4.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Silacayoapam (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years44.4 mm (1.7 in)
5 years61.7 mm (2.4 in)
10 years74.7 mm (2.9 in)
25 years93.2 mm (3.7 in)
50 years108.5 mm (4.3 in)Longer than the 45 years of record
100 years125.3 mm (4.9 in)Longer than the 45 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, 45 years of values from 1949 to 2000.

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: 124.0 mm (4.9 in) in 1972; 90.7 mm (3.6 in) in 1998; 87.1 mm (3.4 in) in 1987.

Download the Data

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