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Built 2026-10-15 (15 October 2026)

Tiruvallur Weather Records (IN020040300)

Record envelope, standing records and threshold days for Tiruvallur (IN020040300), India, with 70 years of record.

Key Facts for Tiruvallur

  • Tiruvallur (IN020040300) is a weather station in India at 13.13 latitude and 79.92 longitude, 13 m (43 ft) above sea level.
  • The station reports from 1901 to 1970, 70 years of record.
  • 0 records set at Tiruvallur still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Tiruvallur set a daily record precipitation of 154.0 mm (6.1 in) on 21 November 1970.

About the Station

  • Location: India, 13.13 latitude, 79.92 longitude.
  • Elevation: 13 m (43 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 Tiruvallur, with 2026 drawn through them The band shows the record high and record low for each calendar day at Tiruvallur. 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 Tiruvallur. 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 Tiruvallur, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

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

Wettest Day of Each Month

Dec: 335.3 mm (13.2 in)
Record daily precipitation for each month at Tiruvallur The wettest day on record for each calendar month at Tiruvallur. The most was 335.3 mm (13.2 in) on 10 December 1901. 0100200300400 Jan: 172.2 mm (6.8 in), 12 January 1918 Jan Feb: 75.2 mm (3.0 in), 10 February 1938 Feb Mar: 136.1 mm (5.4 in), 12 March 1933 Mar Apr: 65.8 mm (2.6 in), 14 April 1931 Apr May: 137.2 mm (5.4 in), 17 May 1943 May Jun: 77.0 mm (3.0 in), 13 June 1930 Jun Jul: 143.0 mm (5.6 in), 31 July 1970 Jul Aug: 88.9 mm (3.5 in), 18 August 1914 Aug Sep: 137.9 mm (5.4 in), 14 September 1947 Sep Oct: 207.0 mm (8.1 in), 18 October 1935 Oct Nov: 285.2 mm (11.2 in), 6 November 1903 Nov Dec: 335.3 mm (13.2 in), 10 December 1901 Dec
The wettest day on record for each calendar month at Tiruvallur. The most was 335.3 mm (13.2 in) on 10 December 1901.
Record daily precipitation for each month at Tiruvallur
MonthRecord daily precipitation (mm)Date
Jan172.2 mm (6.8 in)12 January 1918
Feb75.2 mm (3.0 in)10 February 1938
Mar136.1 mm (5.4 in)12 March 1933
Apr65.8 mm (2.6 in)14 April 1931
May137.2 mm (5.4 in)17 May 1943
Jun77.0 mm (3.0 in)13 June 1930
Jul143.0 mm (5.6 in)31 July 1970
Aug88.9 mm (3.5 in)18 August 1914
Sep137.9 mm (5.4 in)14 September 1947
Oct207.0 mm (8.1 in)18 October 1935
Nov285.2 mm (11.2 in)6 November 1903
Dec335.3 mm (13.2 in)10 December 1901

Latest Records

20
Latest records at Tiruvallur
DateStationRecordValueBeat old record byOld record stoodSignificance
21 November 1970Tiruvallur, INdaily rain154.0 mm (6.1 in)63.1 mm (2.5 in)59 years44 of 100 (Notable)
8 August 1970Tiruvallur, INdaily rain49.0 mm (1.9 in)4.3 mm (0.17 in)15 years14 of 100 (Routine)
31 July 1970Tiruvallur, INmonthly rain143.0 mm (5.6 in)48.5 mm (1.9 in)55 years73 of 100 (Major)
22 July 1970Tiruvallur, INdaily rain67.0 mm (2.6 in)30.7 mm (1.2 in)32 years42 of 100 (Notable)
3 July 1970Tiruvallur, INdaily rain67.0 mm (2.6 in)26.4 mm (1.0 in)35 years39 of 100 (Notable)
1 July 1970Tiruvallur, INdaily rain44.0 mm (1.7 in)2.6 mm (0.10 in)12 years12 of 100 (Routine)
3 June 1970Tiruvallur, INdaily rain45.0 mm (1.8 in)0.2 mm (0.01 in)4 years8 of 100 (Routine)
1 June 1970Tiruvallur, INdaily rain33.0 mm (1.3 in)7.6 mm (0.30 in)53 years29 of 100 (Routine)
20 November 1969Tiruvallur, INdaily rain172.0 mm (6.8 in)78.5 mm (3.1 in)11 years35 of 100 (Notable)
16 October 1969Tiruvallur, INdaily rain160.0 mm (6.3 in)51.5 mm (2.0 in)64 years46 of 100 (Notable)
20 December 1968Tiruvallur, INdaily rain106.0 mm (4.2 in)37.4 mm (1.5 in)26 years23 of 100 (Routine)
23 June 1968Tiruvallur, INdaily rain31.1 mm (1.2 in)15.1 mm (0.6 in)9 years21 of 100 (Routine)
25 April 1968Tiruvallur, INdaily rain64.6 mm (2.5 in)20.1 mm (0.8 in)28 years26 of 100 (Routine)
8 December 1967Tiruvallur, INdaily rain150.0 mm (5.9 in)71.3 mm (2.8 in)20 years33 of 100 (Routine)
24 September 1967Tiruvallur, INdaily rain54.0 mm (2.1 in)4.7 mm (0.19 in)54 years24 of 100 (Routine)
26 August 1967Tiruvallur, INdaily rain39.0 mm (1.5 in)1.9 mm (0.07 in)44 years20 of 100 (Routine)
6 August 1967Tiruvallur, INdaily rain28.0 mm (1.1 in)8.7 mm (0.34 in)50 years27 of 100 (Routine)
18 July 1967Tiruvallur, INdaily rain81.0 mm (3.2 in)48.5 mm (1.9 in)36 years56 of 100 (Notable)
24 March 1967Tiruvallur, INdaily rain37.2 mm (1.5 in)37.2 mm (1.5 in)65 years40 of 100 (Notable)
22 March 1967Tiruvallur, INdaily rain9.0 mm (0.35 in)5.2 mm (0.20 in)61 years20 of 100 (Routine)

Extremes by Year

1901 to 1970
Yearly extremes at Tiruvallur: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)335.3 mm (13.2 in)1901105.9 mm (4.2 in)70
Wettest five days (Rx5day)415.3 mm (16.4 in)1901200.0 mm (7.9 in)70
Longest dry spell (CDD)166 days196486 days70

Wettest day (Rx1day)

Wettest day (Rx1day) at Tiruvallur by year The wettest day of the year at Tiruvallur, 1901 to 1970. The record is 335.3 mm (13.2 in) in 1901, marked on the chart; the median year is 105.9 mm (4.2 in). 0100200300400192019401960Record: 335.3 mm (13.2 in) in 1901
The wettest day of the year at Tiruvallur, 1901 to 1970. The record is 335.3 mm (13.2 in) in 1901, marked on the chart; the median year is 105.9 mm (4.2 in).
Wettest day (Rx1day) at Tiruvallur by year
YearWettest day (Rx1day)
1901335.3 mm (13.2 in)
1902156.2 mm (6.1 in)
1903285.2 mm (11.2 in)
190473.4 mm (2.9 in)
1905108.5 mm (4.3 in)
190689.2 mm (3.5 in)
190798.0 mm (3.9 in)
190899.1 mm (3.9 in)
1909105.7 mm (4.2 in)
1910128.5 mm (5.1 in)
191190.9 mm (3.6 in)
191281.8 mm (3.2 in)
1913105.4 mm (4.1 in)
191488.9 mm (3.5 in)
191594.5 mm (3.7 in)
1916137.2 mm (5.4 in)
191777.2 mm (3.0 in)
1918172.2 mm (6.8 in)
191987.6 mm (3.4 in)
1920110.5 mm (4.4 in)
192149.3 mm (1.9 in)
1922175.8 mm (6.9 in)
1923100.1 mm (3.9 in)
1924180.8 mm (7.1 in)
192568.6 mm (2.7 in)
192683.8 mm (3.3 in)
192790.2 mm (3.6 in)
192867.3 mm (2.6 in)
192980.8 mm (3.2 in)
1930128.5 mm (5.1 in)
1931118.9 mm (4.7 in)
1932151.6 mm (6.0 in)
1933200.7 mm (7.9 in)
1934137.2 mm (5.4 in)
1935207.0 mm (8.1 in)
193669.6 mm (2.7 in)
1937114.6 mm (4.5 in)
193875.2 mm (3.0 in)
193978.7 mm (3.1 in)
1940121.4 mm (4.8 in)
194185.1 mm (3.4 in)
194277.2 mm (3.0 in)
1943137.2 mm (5.4 in)
194481.8 mm (3.2 in)
194552.1 mm (2.1 in)
1946102.4 mm (4.0 in)
1947137.9 mm (5.4 in)
1948116.1 mm (4.6 in)
1949114.3 mm (4.5 in)
195094.0 mm (3.7 in)
195153.3 mm (2.1 in)
1952136.1 mm (5.4 in)
1953122.4 mm (4.8 in)
1954114.8 mm (4.5 in)
1955105.4 mm (4.1 in)
195652.1 mm (2.1 in)
195795.0 mm (3.7 in)
1958139.7 mm (5.5 in)
195990.8 mm (3.6 in)
1960180.8 mm (7.1 in)
196165.0 mm (2.6 in)
1962111.3 mm (4.4 in)
1963125.0 mm (4.9 in)
196478.3 mm (3.1 in)
1965139.0 mm (5.5 in)
1966162.3 mm (6.4 in)
1967150.0 mm (5.9 in)
1968106.0 mm (4.2 in)
1969172.0 mm (6.8 in)
1970154.0 mm (6.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Tiruvallur by year The wettest five days of the year at Tiruvallur, 1901 to 1970. The record is 415.3 mm (16.4 in) in 1901, marked on the chart; the median year is 200.0 mm (7.9 in). 0100200300400500192019401960Record: 415.3 mm (16.4 in) in 1901
The wettest five days of the year at Tiruvallur, 1901 to 1970. The record is 415.3 mm (16.4 in) in 1901, marked on the chart; the median year is 200.0 mm (7.9 in).
Wettest five days (Rx5day) at Tiruvallur by year
YearWettest five days (Rx5day)
1901415.3 mm (16.4 in)
1902227.9 mm (9.0 in)
1903383.9 mm (15.1 in)
1904357.5 mm (14.1 in)
1905233.2 mm (9.2 in)
1906147.6 mm (5.8 in)
1907116.4 mm (4.6 in)
1908275.1 mm (10.8 in)
1909147.1 mm (5.8 in)
1910162.3 mm (6.4 in)
1911258.2 mm (10.2 in)
1912226.5 mm (8.9 in)
1913252.7 mm (9.9 in)
1914153.3 mm (6.0 in)
1915197.4 mm (7.8 in)
1916176.0 mm (6.9 in)
1917188.0 mm (7.4 in)
1918176.8 mm (7.0 in)
1919213.6 mm (8.4 in)
1920246.7 mm (9.7 in)
1921171.8 mm (6.8 in)
1922267.4 mm (10.5 in)
1923238.9 mm (9.4 in)
1924226.8 mm (8.9 in)
1925155.2 mm (6.1 in)
1926215.5 mm (8.5 in)
1927153.2 mm (6.0 in)
1928132.1 mm (5.2 in)
1929170.9 mm (6.7 in)
1930316.4 mm (12.5 in)
1931199.6 mm (7.9 in)
1932257.5 mm (10.1 in)
1933392.7 mm (15.5 in)
1934317.1 mm (12.5 in)
1935329.1 mm (13.0 in)
1936148.9 mm (5.9 in)
1937319.9 mm (12.6 in)
1938117.4 mm (4.6 in)
1939166.6 mm (6.6 in)
1940204.2 mm (8.0 in)
1941157.0 mm (6.2 in)
1942209.9 mm (8.3 in)
1943354.4 mm (14.0 in)
1944200.4 mm (7.9 in)
1945151.5 mm (6.0 in)
1946349.8 mm (13.8 in)
1947158.0 mm (6.2 in)
1948150.6 mm (5.9 in)
1949152.9 mm (6.0 in)
1950135.3 mm (5.3 in)
195177.5 mm (3.1 in)
1952239.2 mm (9.4 in)
1953224.8 mm (8.9 in)
1954220.2 mm (8.7 in)
1955185.4 mm (7.3 in)
1956137.2 mm (5.4 in)
1957228.7 mm (9.0 in)
1958180.9 mm (7.1 in)
1959166.0 mm (6.5 in)
1960314.4 mm (12.4 in)
1961126.5 mm (5.0 in)
1962196.4 mm (7.7 in)
1963125.0 mm (4.9 in)
1964144.9 mm (5.7 in)
1965167.4 mm (6.6 in)
1966270.9 mm (10.7 in)
1967217.0 mm (8.5 in)
1968161.0 mm (6.3 in)
1969250.0 mm (9.8 in)
1970265.0 mm (10.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Tiruvallur by year The longest dry spell of the year at Tiruvallur, 1901 to 1970. The record is 166 days in 1964, marked on the chart; the median year is 86 days. 050100150200192019401960Record: 166 days in 1964
The longest dry spell of the year at Tiruvallur, 1901 to 1970. The record is 166 days in 1964, marked on the chart; the median year is 86 days.
Longest dry spell (CDD) at Tiruvallur by year
YearLongest dry spell (CDD)
190179 days
1902126 days
190377 days
1904126 days
190535 days
190659 days
190784 days
190885 days
190997 days
191096 days
1911140 days
1912155 days
1913137 days
191487 days
191537 days
1916105 days
1917102 days
191849 days
191971 days
192076 days
192176 days
1922116 days
192362 days
1924135 days
192557 days
192681 days
192792 days
192890 days
192977 days
193039 days
193196 days
193255 days
193370 days
193482 days
1935139 days
193645 days
193745 days
193890 days
193966 days
1940115 days
1941153 days
1942123 days
194354 days
194461 days
194583 days
194683 days
194775 days
1948108 days
1949132 days
195055 days
195189 days
195262 days
195351 days
1954161 days
195589 days
195689 days
1957112 days
1958103 days
195929 days
196077 days
1961120 days
196281 days
196377 days
1964166 days
1965110 days
196689 days
196767 days
1968115 days
1969137 days
1970104 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

70 years, 1901 to 1970

A day with at least 106.0 mm (4.2 in) of rain is expected about once in 2 years. A day with at least 291.9 mm (11.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Tiruvallur: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years106.0 mm (4.2 in)
5 years146.9 mm (5.8 in)
10 years177.3 mm (7.0 in)
25 years219.7 mm (8.6 in)
50 years254.4 mm (10.0 in)
100 years291.9 mm (11.5 in)Longer than the 70 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, 70 years of values from 1901 to 1970.

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: 335.3 mm (13.2 in) in 1901; 285.2 mm (11.2 in) in 1903; 207.0 mm (8.1 in) in 1935.

Download the Data

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