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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Vallam Weather Records (IN020121700)

Record envelope, standing records and threshold days for Vallam (IN020121700), India, with 70 years of record.

Key Facts for Vallam

  • Vallam (IN020121700) is a weather station in India at 10.72 latitude and 79.07 longitude, 46 m (151 ft) above sea level.
  • The station reports from 1901 to 1970, 70 years of record.
  • 0 records set at Vallam still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Vallam set a daily record precipitation of 14.0 mm (0.6 in) on 24 January 1966.

About the Station

  • Location: India, 10.72 latitude, 79.07 longitude.
  • Elevation: 46 m (151 ft).
  • Period of record: 1901 to 1970, 70 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Vallam, with 2026 drawn through them The band shows the record high and record low for each calendar day at Vallam. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Vallam. 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 Vallam, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
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Novn/an/an/an/a
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Which Years Hold Standing Records

0 standing records
Standing records at Vallam by the year they were set 0 records at Vallam still stand. 00000000000
0 records at Vallam still stand.
Standing records at Vallam by the year they were set
Year setStanding records

Wettest Day of Each Month

Oct: 238.8 mm (9.4 in)
Record daily precipitation for each month at Vallam The wettest day on record for each calendar month at Vallam. The most was 238.8 mm (9.4 in) on 24 October 1930. 0100200300 Jan: 188.0 mm (7.4 in), 13 January 1923 Jan Feb: 76.7 mm (3.0 in), 21 February 1944 Feb Mar: 52.1 mm (2.1 in), 8 March 1944 Mar Apr: 211.3 mm (8.3 in), 14 April 1939 Apr May: 137.0 mm (5.4 in), 8 May 1961 May Jun: 151.4 mm (6.0 in), 13 June 1940 Jun Jul: 125.1 mm (4.9 in), 7 July 1960 Jul Aug: 124.5 mm (4.9 in), 18 August 1906 Aug Sep: 124.7 mm (4.9 in), 26 September 1942 Sep Oct: 238.8 mm (9.4 in), 24 October 1930 Oct Nov: 174.8 mm (6.9 in), 21 November 1911 Nov Dec: 227.3 mm (8.9 in), 7 December 1952 Dec
The wettest day on record for each calendar month at Vallam. The most was 238.8 mm (9.4 in) on 24 October 1930.
Record daily precipitation for each month at Vallam
MonthRecord daily precipitation (mm)Date
Jan188.0 mm (7.4 in)13 January 1923
Feb76.7 mm (3.0 in)21 February 1944
Mar52.1 mm (2.1 in)8 March 1944
Apr211.3 mm (8.3 in)14 April 1939
May137.0 mm (5.4 in)8 May 1961
Jun151.4 mm (6.0 in)13 June 1940
Jul125.1 mm (4.9 in)7 July 1960
Aug124.5 mm (4.9 in)18 August 1906
Sep124.7 mm (4.9 in)26 September 1942
Oct238.8 mm (9.4 in)24 October 1930
Nov174.8 mm (6.9 in)21 November 1911
Dec227.3 mm (8.9 in)7 December 1952

Latest Records

20
Latest records at Vallam
DateStationRecordValueBeat old record byOld record stoodSignificance
24 January 1966Vallam, INdaily rain14.0 mm (0.6 in)11.0 mm (0.4 in)32 years19 of 100 (Routine)
26 July 1963Vallam, INdaily rain64.2 mm (2.5 in)10.9 mm (0.4 in)58 years29 of 100 (Routine)
25 July 1963Vallam, INdaily rain80.6 mm (3.2 in)65.4 mm (2.6 in)21 years52 of 100 (Notable)
15 July 1963Vallam, INdaily rain19.6 mm (0.8 in)5.6 mm (0.22 in)46 years20 of 100 (Routine)
9 January 1963Vallam, INdaily rain46.8 mm (1.8 in)10.2 mm (0.4 in)32 years18 of 100 (Routine)
8 January 1963Vallam, INdaily rain84.6 mm (3.3 in)59.7 mm (2.4 in)32 years37 of 100 (Notable)
6 August 1961Vallam, INdaily rain59.6 mm (2.3 in)11.1 mm (0.4 in)32 years20 of 100 (Routine)
23 June 1961Vallam, INdaily rain57.6 mm (2.3 in)6.8 mm (0.27 in)2 years9 of 100 (Routine)
18 June 1961Vallam, INdaily rain122.6 mm (4.8 in)75.1 mm (3.0 in)51 years61 of 100 (Major)
11 June 1961Vallam, INdaily rain133.6 mm (5.3 in)73.7 mm (2.9 in)38 years57 of 100 (Notable)
8 May 1961Vallam, INmonthly rain137.0 mm (5.4 in)22.7 mm (0.9 in)31 years36 of 100 (Notable)
16 January 1961Vallam, INdaily rain6.0 mm (0.24 in)0.9 mm (0.04 in)55 years20 of 100 (Routine)
15 January 1961Vallam, INdaily rain41.2 mm (1.6 in)36.1 mm (1.4 in)40 years31 of 100 (Routine)
11 January 1961Vallam, INdaily rain45.2 mm (1.8 in)0.7 mm (0.03 in)22 years12 of 100 (Routine)
9 November 1960Vallam, INdaily rain57.8 mm (2.3 in)21.5 mm (0.8 in)47 years29 of 100 (Routine)
24 July 1960Vallam, INdaily rain50.0 mm (2.0 in)34.5 mm (1.4 in)27 years37 of 100 (Notable)
7 July 1960Vallam, INmonthly rain125.1 mm (4.9 in)45.1 mm (1.8 in)12 years50 of 100 (Notable)
16 April 1960Vallam, INdaily rain28.4 mm (1.1 in)4.3 mm (0.17 in)29 years16 of 100 (Routine)
26 February 1960Vallam, INdaily rain23.6 mm (0.9 in)18.0 mm (0.7 in)24 years20 of 100 (Routine)
23 January 1960Vallam, INdaily rain23.6 mm (0.9 in)18.5 mm (0.7 in)41 years20 of 100 (Routine)

Extremes by Year

1901 to 1970
Yearly extremes at Vallam: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)238.8 mm (9.4 in)193086.1 mm (3.4 in)64
Wettest five days (Rx5day)429.1 mm (16.9 in)1930141.9 mm (5.6 in)64
Longest dry spell (CDD)143 days195970 days64

Wettest day (Rx1day)

Wettest day (Rx1day) at Vallam by year The wettest day of the year at Vallam, 1901 to 1970. The record is 238.8 mm (9.4 in) in 1930, marked on the chart; the median year is 86.1 mm (3.4 in). 50100150200250192019401960Record: 238.8 mm (9.4 in) in 1930
The wettest day of the year at Vallam, 1901 to 1970. The record is 238.8 mm (9.4 in) in 1930, marked on the chart; the median year is 86.1 mm (3.4 in).
Wettest day (Rx1day) at Vallam by year
YearWettest day (Rx1day)
190172.6 mm (2.9 in)
190297.8 mm (3.9 in)
1903108.7 mm (4.3 in)
190476.7 mm (3.0 in)
190571.1 mm (2.8 in)
1906124.5 mm (4.9 in)
1907118.1 mm (4.6 in)
190851.6 mm (2.0 in)
1909140.2 mm (5.5 in)
1910116.6 mm (4.6 in)
1911174.8 mm (6.9 in)
191278.7 mm (3.1 in)
191387.1 mm (3.4 in)
191466.0 mm (2.6 in)
191585.1 mm (3.4 in)
191687.6 mm (3.4 in)
191769.9 mm (2.8 in)
191877.0 mm (3.0 in)
191978.7 mm (3.1 in)
1920144.8 mm (5.7 in)
1921123.2 mm (4.9 in)
192253.6 mm (2.1 in)
1923188.0 mm (7.4 in)
192455.9 mm (2.2 in)
192568.1 mm (2.7 in)
192653.6 mm (2.1 in)
192767.1 mm (2.6 in)
192888.9 mm (3.5 in)
192956.9 mm (2.2 in)
1930238.8 mm (9.4 in)
1931166.1 mm (6.5 in)
1932132.3 mm (5.2 in)
193371.1 mm (2.8 in)
193473.7 mm (2.9 in)
193562.2 mm (2.4 in)
1936104.1 mm (4.1 in)
193799.1 mm (3.9 in)
1938127.0 mm (5.0 in)
1939211.3 mm (8.3 in)
1940151.4 mm (6.0 in)
194190.9 mm (3.6 in)
1942124.7 mm (4.9 in)
194381.5 mm (3.2 in)
194481.3 mm (3.2 in)
194569.3 mm (2.7 in)
1946141.5 mm (5.6 in)
194781.3 mm (3.2 in)
194853.3 mm (2.1 in)
194969.9 mm (2.8 in)
195056.6 mm (2.2 in)
195159.9 mm (2.4 in)
1952227.3 mm (8.9 in)
195364.8 mm (2.6 in)
195467.8 mm (2.7 in)
1955100.3 mm (3.9 in)
1956120.1 mm (4.7 in)
1957104.6 mm (4.1 in)
1958123.7 mm (4.9 in)
195976.2 mm (3.0 in)
1960125.1 mm (4.9 in)
1961137.0 mm (5.4 in)
196384.6 mm (3.3 in)
196675.0 mm (3.0 in)
1970115.0 mm (4.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Vallam by year The wettest five days of the year at Vallam, 1901 to 1970. The record is 429.1 mm (16.9 in) in 1930, marked on the chart; the median year is 141.9 mm (5.6 in). 0100200300400500192019401960Record: 429.1 mm (16.9 in) in 1930
The wettest five days of the year at Vallam, 1901 to 1970. The record is 429.1 mm (16.9 in) in 1930, marked on the chart; the median year is 141.9 mm (5.6 in).
Wettest five days (Rx5day) at Vallam by year
YearWettest five days (Rx5day)
1901139.8 mm (5.5 in)
1902143.3 mm (5.6 in)
1903165.6 mm (6.5 in)
1904196.1 mm (7.7 in)
1905124.2 mm (4.9 in)
1906149.4 mm (5.9 in)
1907187.2 mm (7.4 in)
1908115.8 mm (4.6 in)
1909179.8 mm (7.1 in)
1910186.4 mm (7.3 in)
1911304.5 mm (12.0 in)
1912172.7 mm (6.8 in)
1913264.1 mm (10.4 in)
1914132.0 mm (5.2 in)
1915107.2 mm (4.2 in)
1916123.4 mm (4.9 in)
191793.0 mm (3.7 in)
1918112.8 mm (4.4 in)
1919220.0 mm (8.7 in)
1920276.9 mm (10.9 in)
1921320.1 mm (12.6 in)
192297.6 mm (3.8 in)
1923363.8 mm (14.3 in)
192495.0 mm (3.7 in)
1925130.8 mm (5.1 in)
1926122.0 mm (4.8 in)
192798.3 mm (3.9 in)
1928163.0 mm (6.4 in)
192993.9 mm (3.7 in)
1930429.1 mm (16.9 in)
1931386.9 mm (15.2 in)
1932202.2 mm (8.0 in)
1933130.8 mm (5.1 in)
1934116.1 mm (4.6 in)
1935136.7 mm (5.4 in)
1936237.1 mm (9.3 in)
1937228.1 mm (9.0 in)
1938253.4 mm (10.0 in)
1939266.4 mm (10.5 in)
1940280.4 mm (11.0 in)
1941119.9 mm (4.7 in)
1942180.4 mm (7.1 in)
1943122.4 mm (4.8 in)
1944124.7 mm (4.9 in)
1945120.4 mm (4.7 in)
1946192.3 mm (7.6 in)
1947135.6 mm (5.3 in)
1948122.1 mm (4.8 in)
1949149.4 mm (5.9 in)
195098.6 mm (3.9 in)
195166.7 mm (2.6 in)
1952241.3 mm (9.5 in)
1953115.8 mm (4.6 in)
1954212.9 mm (8.4 in)
1955202.7 mm (8.0 in)
1956129.0 mm (5.1 in)
1957126.2 mm (5.0 in)
1958140.5 mm (5.5 in)
195995.7 mm (3.8 in)
1960156.3 mm (6.2 in)
1961137.0 mm (5.4 in)
1963195.8 mm (7.7 in)
196686.0 mm (3.4 in)
1970192.8 mm (7.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Vallam by year The longest dry spell of the year at Vallam, 1901 to 1970. The record is 143 days in 1959, marked on the chart; the median year is 70 days. 050100150192019401960Record: 143 days in 1959
The longest dry spell of the year at Vallam, 1901 to 1970. The record is 143 days in 1959, marked on the chart; the median year is 70 days.
Longest dry spell (CDD) at Vallam by year
YearLongest dry spell (CDD)
190142 days
190242 days
190389 days
1904121 days
190584 days
190640 days
190791 days
190842 days
190960 days
191054 days
191188 days
1912108 days
191388 days
191490 days
191554 days
1916111 days
191755 days
1918100 days
191999 days
1920100 days
192169 days
192221 days
192345 days
192472 days
192571 days
192670 days
192748 days
192851 days
192973 days
193034 days
193173 days
193263 days
193335 days
193477 days
193539 days
193648 days
193772 days
193835 days
193964 days
194070 days
194192 days
194286 days
194336 days
194447 days
194533 days
194652 days
194778 days
194838 days
194994 days
195057 days
195178 days
195247 days
195352 days
195459 days
195564 days
1956107 days
1957113 days
195875 days
1959143 days
196048 days
1961111 days
196373 days
196682 days
197017 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

62 years, 1901 to 1963

A day with at least 89.9 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 272.9 mm (10.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Vallam: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years89.9 mm (3.5 in)
5 years126.6 mm (5.0 in)
10 years155.2 mm (6.1 in)
25 years197.0 mm (7.8 in)
50 years232.8 mm (9.2 in)
100 years272.9 mm (10.7 in)Longer than the 62 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, 62 years of values from 1901 to 1963.

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: 238.8 mm (9.4 in) in 1930; 227.3 mm (8.9 in) in 1952; 211.3 mm (8.3 in) in 1939.

Download the Data

  • Data for Vallam standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Vallam 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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