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Siwan Weather Records (IN004140200)

Record envelope, standing records and threshold days for Siwan (IN004140200), India, with 68 years of record.

Key Facts for Siwan

  • Siwan (IN004140200) is a weather station in India at 26.22 latitude and 84.37 longitude, 63 m (207 ft) above sea level.
  • The station reports from 1901 to 1968, 68 years of record.
  • 0 records set at Siwan still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Siwan set a monthly record daily precipitation of 247.4 mm (9.7 in) on 28 June 1968.

About the Station

  • Location: India, 26.22 latitude, 84.37 longitude.
  • Elevation: 63 m (207 ft).
  • Period of record: 1901 to 1968, 68 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Siwan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Siwan. 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 Siwan. 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 Siwan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
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Mayn/an/an/an/a
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Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

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

All-Time Record Progression

2 new records
When Siwan set new all-time records 2 all-time records were set at Siwan between 13 July 1934 and 21 August 1953. Each dot is a new record. Record daily precipitation13 July 1934: Record daily precipitation 232.2 mm (9.1 in)21 August 1953: Record daily precipitation 266.7 mm (10.5 in)1935194019451950
2 all-time records were set at Siwan between 13 July 1934 and 21 August 1953. Each dot is a new record.
When Siwan set new all-time records
DateKindDetail
1934-07-13Record daily precipitationRecord daily precipitation 232.2 mm (9.1 in)
1953-08-21Record daily precipitationRecord daily precipitation 266.7 mm (10.5 in)

Wettest Day of Each Month

Aug: 266.7 mm (10.5 in)
Record daily precipitation for each month at Siwan The wettest day on record for each calendar month at Siwan. The most was 266.7 mm (10.5 in) on 21 August 1953. 0100200300 Jan: 50.1 mm (2.0 in), 28 January 1959 Jan Feb: 42.2 mm (1.7 in), 21 February 1915 Feb Mar: 41.9 mm (1.6 in), 30 March 1944 Mar Apr: 45.2 mm (1.8 in), 12 April 1946 Apr May: 73.9 mm (2.9 in), 31 May 1916 May Jun: 247.4 mm (9.7 in), 28 June 1968 Jun Jul: 232.2 mm (9.1 in), 13 July 1934 Jul Aug: 266.7 mm (10.5 in), 21 August 1953 Aug Sep: 185.4 mm (7.3 in), 15 September 1921 Sep Oct: 118.1 mm (4.6 in), 18 October 1904 Oct Nov: 47.2 mm (1.9 in), 4 November 1932 Nov Dec: 30.2 mm (1.2 in), 21 December 1940 Dec
The wettest day on record for each calendar month at Siwan. The most was 266.7 mm (10.5 in) on 21 August 1953.
Record daily precipitation for each month at Siwan
MonthRecord daily precipitation (mm)Date
Jan50.1 mm (2.0 in)28 January 1959
Feb42.2 mm (1.7 in)21 February 1915
Mar41.9 mm (1.6 in)30 March 1944
Apr45.2 mm (1.8 in)12 April 1946
May73.9 mm (2.9 in)31 May 1916
Jun247.4 mm (9.7 in)28 June 1968
Jul232.2 mm (9.1 in)13 July 1934
Aug266.7 mm (10.5 in)21 August 1953
Sep185.4 mm (7.3 in)15 September 1921
Oct118.1 mm (4.6 in)18 October 1904
Nov47.2 mm (1.9 in)4 November 1932
Dec30.2 mm (1.2 in)21 December 1940

Latest Records

20
Latest records at Siwan
DateStationRecordValueBeat old record byOld record stoodSignificance
28 June 1968Siwan, INmonthly rain247.4 mm (9.7 in)120.4 mm (4.7 in)15 years60 of 100 (Major)
29 February 1968Siwan, INdaily rain2.4 mm (0.09 in)1.6 mm (0.06 in)60 years20 of 100 (Routine)
7 January 1968Siwan, INdaily rain36.4 mm (1.4 in)29.0 mm (1.1 in)22 years43 of 100 (Notable)
22 November 1966Siwan, INdaily rain1.4 mm (0.06 in)1.4 mm (0.06 in)64 years20 of 100 (Routine)
1 September 1966Siwan, INdaily rain75.8 mm (3.0 in)2.6 mm (0.10 in)49 years21 of 100 (Routine)
13 February 1966Siwan, INdaily rain18.6 mm (0.7 in)14.8 mm (0.6 in)32 years20 of 100 (Routine)
3 January 1966Siwan, INdaily rain16.4 mm (0.6 in)0.4 mm (0.02 in)31 years15 of 100 (Routine)
1 April 1965Siwan, INdaily rain18.8 mm (0.7 in)10.7 mm (0.4 in)6 years19 of 100 (Routine)
19 March 1965Siwan, INdaily rain13.8 mm (0.5 in)13.0 mm (0.5 in)24 years20 of 100 (Routine)
30 August 1964Siwan, INdaily rain125.4 mm (4.9 in)44.1 mm (1.7 in)50 years38 of 100 (Notable)
30 July 1964Siwan, INdaily rain89.8 mm (3.5 in)22.7 mm (0.9 in)47 years28 of 100 (Routine)
9 July 1964Siwan, INdaily rain97.0 mm (3.8 in)1.7 mm (0.07 in)4 years7 of 100 (Routine)
12 May 1964Siwan, INdaily rain62.8 mm (2.5 in)37.9 mm (1.5 in)60 years58 of 100 (Notable)
10 May 1964Siwan, INdaily rain23.4 mm (0.9 in)13.0 mm (0.5 in)35 years20 of 100 (Routine)
25 April 1964Siwan, INdaily rain10.8 mm (0.4 in)5.7 mm (0.22 in)20 years18 of 100 (Routine)
16 April 1964Siwan, INdaily rain29.6 mm (1.2 in)29.6 mm (1.2 in)63 years59 of 100 (Notable)
3 October 1961Siwan, INdaily rain82.2 mm (3.2 in)24.8 mm (1.0 in)16 years20 of 100 (Routine)
28 September 1961Siwan, INdaily rain36.0 mm (1.4 in)7.8 mm (0.31 in)34 years19 of 100 (Routine)
19 September 1961Siwan, INdaily rain53.8 mm (2.1 in)13.2 mm (0.5 in)44 years24 of 100 (Routine)
13 June 1961Siwan, INdaily rain84.4 mm (3.3 in)36.1 mm (1.4 in)8 years24 of 100 (Routine)

Extremes by Year

1901 to 1968
Yearly extremes at Siwan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)266.7 mm (10.5 in)1953106.4 mm (4.2 in)65
Wettest five days (Rx5day)458.0 mm (18.0 in)1953206.3 mm (8.1 in)65
Longest dry spell (CDD)117 days191079 days65

Wettest day (Rx1day)

Wettest day (Rx1day) at Siwan by year The wettest day of the year at Siwan, 1901 to 1968. The record is 266.7 mm (10.5 in) in 1953, marked on the chart; the median year is 106.4 mm (4.2 in). 0100200300192019401960Record: 266.7 mm (10.5 in) in 1953
The wettest day of the year at Siwan, 1901 to 1968. The record is 266.7 mm (10.5 in) in 1953, marked on the chart; the median year is 106.4 mm (4.2 in).
Wettest day (Rx1day) at Siwan by year
YearWettest day (Rx1day)
1901141.2 mm (5.6 in)
190258.9 mm (2.3 in)
190386.9 mm (3.4 in)
1904118.1 mm (4.6 in)
1905190.0 mm (7.5 in)
190664.5 mm (2.5 in)
190751.6 mm (2.0 in)
1908123.2 mm (4.9 in)
1909114.8 mm (4.5 in)
1910116.6 mm (4.6 in)
1911170.2 mm (6.7 in)
1912147.3 mm (5.8 in)
1913189.2 mm (7.4 in)
1914129.8 mm (5.1 in)
1915163.3 mm (6.4 in)
1916100.6 mm (4.0 in)
191789.4 mm (3.5 in)
191881.3 mm (3.2 in)
1919106.4 mm (4.2 in)
1920163.1 mm (6.4 in)
1921185.4 mm (7.3 in)
1922156.0 mm (6.1 in)
192380.5 mm (3.2 in)
1924118.9 mm (4.7 in)
1925156.2 mm (6.1 in)
192699.1 mm (3.9 in)
1927107.4 mm (4.2 in)
192874.4 mm (2.9 in)
1929102.4 mm (4.0 in)
193071.6 mm (2.8 in)
1931106.9 mm (4.2 in)
193256.1 mm (2.2 in)
1933102.9 mm (4.1 in)
1934232.2 mm (9.1 in)
193556.1 mm (2.2 in)
193661.0 mm (2.4 in)
1937117.6 mm (4.6 in)
193881.3 mm (3.2 in)
1939104.9 mm (4.1 in)
1940215.9 mm (8.5 in)
1941128.3 mm (5.1 in)
194269.9 mm (2.8 in)
194368.6 mm (2.7 in)
194490.4 mm (3.6 in)
194583.1 mm (3.3 in)
1946106.2 mm (4.2 in)
194772.1 mm (2.8 in)
1948107.2 mm (4.2 in)
194971.4 mm (2.8 in)
1950114.3 mm (4.5 in)
195151.8 mm (2.0 in)
1952121.4 mm (4.8 in)
1953266.7 mm (10.5 in)
1954118.9 mm (4.7 in)
1955124.5 mm (4.9 in)
195697.0 mm (3.8 in)
195783.8 mm (3.3 in)
195886.7 mm (3.4 in)
1959114.4 mm (4.5 in)
1960112.5 mm (4.4 in)
196184.4 mm (3.3 in)
1964125.4 mm (4.9 in)
196579.6 mm (3.1 in)
196675.8 mm (3.0 in)
1968247.4 mm (9.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Siwan by year The wettest five days of the year at Siwan, 1901 to 1968. The record is 458.0 mm (18.0 in) in 1953, marked on the chart; the median year is 206.3 mm (8.1 in). 0100200300400500192019401960Record: 458.0 mm (18.0 in) in 1953
The wettest five days of the year at Siwan, 1901 to 1968. The record is 458.0 mm (18.0 in) in 1953, marked on the chart; the median year is 206.3 mm (8.1 in).
Wettest five days (Rx5day) at Siwan by year
YearWettest five days (Rx5day)
1901187.9 mm (7.4 in)
1902134.4 mm (5.3 in)
1903164.4 mm (6.5 in)
1904194.6 mm (7.7 in)
1905402.4 mm (15.8 in)
1906168.0 mm (6.6 in)
1907114.1 mm (4.5 in)
1908178.6 mm (7.0 in)
1909182.1 mm (7.2 in)
1910280.9 mm (11.1 in)
1911375.9 mm (14.8 in)
1912288.3 mm (11.4 in)
1913261.6 mm (10.3 in)
1914247.4 mm (9.7 in)
1915330.0 mm (13.0 in)
1916257.6 mm (10.1 in)
1917250.4 mm (9.9 in)
1918170.1 mm (6.7 in)
1919215.9 mm (8.5 in)
1920246.9 mm (9.7 in)
1921373.7 mm (14.7 in)
1922211.7 mm (8.3 in)
1923124.5 mm (4.9 in)
1924233.7 mm (9.2 in)
1925263.6 mm (10.4 in)
1926245.1 mm (9.6 in)
1927154.6 mm (6.1 in)
1928182.4 mm (7.2 in)
1929237.9 mm (9.4 in)
1930162.1 mm (6.4 in)
1931208.7 mm (8.2 in)
193297.8 mm (3.9 in)
1933268.9 mm (10.6 in)
1934396.8 mm (15.6 in)
1935120.6 mm (4.7 in)
1936187.8 mm (7.4 in)
1937247.0 mm (9.7 in)
1938206.3 mm (8.1 in)
1939114.0 mm (4.5 in)
1940342.0 mm (13.5 in)
1941169.9 mm (6.7 in)
1942176.1 mm (6.9 in)
1943106.4 mm (4.2 in)
1944156.3 mm (6.2 in)
1945189.8 mm (7.5 in)
1946234.2 mm (9.2 in)
1947147.6 mm (5.8 in)
1948251.5 mm (9.9 in)
1949153.7 mm (6.1 in)
1950183.4 mm (7.2 in)
195187.9 mm (3.5 in)
1952190.5 mm (7.5 in)
1953458.0 mm (18.0 in)
1954228.6 mm (9.0 in)
1955254.0 mm (10.0 in)
1956190.8 mm (7.5 in)
1957208.0 mm (8.2 in)
1958137.1 mm (5.4 in)
1959241.8 mm (9.5 in)
1960223.1 mm (8.8 in)
1961135.3 mm (5.3 in)
1964251.8 mm (9.9 in)
1965134.0 mm (5.3 in)
1966124.0 mm (4.9 in)
1968285.2 mm (11.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Siwan by year The longest dry spell of the year at Siwan, 1901 to 1968. The record is 117 days in 1910, marked on the chart; the median year is 79 days. 406080100120192019401960Record: 117 days in 1910
The longest dry spell of the year at Siwan, 1901 to 1968. The record is 117 days in 1910, marked on the chart; the median year is 79 days.
Longest dry spell (CDD) at Siwan by year
YearLongest dry spell (CDD)
190160 days
190273 days
190384 days
190477 days
190591 days
190691 days
190799 days
1908110 days
190979 days
1910117 days
191141 days
191256 days
191362 days
191497 days
191540 days
191670 days
191795 days
191880 days
191976 days
192075 days
192179 days
192280 days
192387 days
192462 days
192589 days
192674 days
192776 days
192883 days
192961 days
193041 days
193168 days
193280 days
193371 days
193454 days
1935106 days
193649 days
193759 days
193887 days
193984 days
194072 days
194189 days
194285 days
194371 days
194486 days
194562 days
194649 days
194790 days
194877 days
194961 days
1950109 days
1951110 days
195274 days
195392 days
195493 days
195590 days
195655 days
1957103 days
195882 days
195962 days
196087 days
196165 days
1964106 days
196576 days
196645 days
196887 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

60 years, 1901 to 1968

A day with at least 104.5 mm (4.1 in) of rain is expected about once in 2 years. A day with at least 263.0 mm (10.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Siwan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years104.5 mm (4.1 in)
5 years143.9 mm (5.7 in)
10 years171.2 mm (6.7 in)
25 years207.0 mm (8.1 in)
50 years234.7 mm (9.2 in)
100 years263.0 mm (10.4 in)Longer than the 60 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, 60 years of values from 1901 to 1968.

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: 247.4 mm (9.7 in) in 1968; 232.2 mm (9.1 in) in 1934; 215.9 mm (8.5 in) in 1940.

Download the Data

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