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Built 2026-10-16 (16 October 2026)

Islampur Weather Records (IN004100700)

Record envelope, standing records and threshold days for Islampur (IN004100700), India, with 68 years of record.

Key Facts for Islampur

  • Islampur (IN004100700) is a weather station in India at 25.15 latitude and 85.22 longitude, 61 m (200 ft) above sea level.
  • The station reports from 1903 to 1970, 68 years of record.
  • 0 records set at Islampur still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Islampur set a daily record precipitation of 10.0 mm (0.4 in) on 23 May 1970.

About the Station

  • Location: India, 25.15 latitude, 85.22 longitude.
  • Elevation: 61 m (200 ft).
  • Period of record: 1903 to 1970, 68 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Islampur, with 2026 drawn through them The band shows the record high and record low for each calendar day at Islampur. 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 Islampur. 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 Islampur, 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 Islampur by the year they were set 0 records at Islampur still stand. 00000000000
0 records at Islampur still stand.
Standing records at Islampur by the year they were set
Year setStanding records

All-Time Record Progression

2 new records
When Islampur set new all-time records 2 all-time records were set at Islampur between 10 August 1942 and 26 September 1960. Each dot is a new record. Record daily precipitation10 August 1942: Record daily precipitation 193.0 mm (7.6 in)26 September 1960: Record daily precipitation 252.0 mm (9.9 in)1945195019551960
2 all-time records were set at Islampur between 10 August 1942 and 26 September 1960. Each dot is a new record.
When Islampur set new all-time records
DateKindDetail
1942-08-10Record daily precipitationRecord daily precipitation 193.0 mm (7.6 in)
1960-09-26Record daily precipitationRecord daily precipitation 252.0 mm (9.9 in)

Wettest Day of Each Month

Sep: 252.0 mm (9.9 in)
Record daily precipitation for each month at Islampur The wettest day on record for each calendar month at Islampur. The most was 252.0 mm (9.9 in) on 26 September 1960. 0100200300 Jan: 57.4 mm (2.3 in), 27 January 1929 Jan Feb: 72.4 mm (2.9 in), 4 February 1915 Feb Mar: 57.2 mm (2.3 in), 15 March 1939 Mar Apr: 61.7 mm (2.4 in), 13 April 1933 Apr May: 88.9 mm (3.5 in), 14 May 1918 May Jun: 175.0 mm (6.9 in), 20 June 1964 Jun Jul: 160.0 mm (6.3 in), 17 July 1926 Jul Aug: 193.0 mm (7.6 in), 10 August 1942 Aug Sep: 252.0 mm (9.9 in), 26 September 1960 Sep Oct: 152.0 mm (6.0 in), 2 October 1961 Oct Nov: 86.4 mm (3.4 in), 19 November 1915 Nov Dec: 43.2 mm (1.7 in), 13 December 1913 Dec
The wettest day on record for each calendar month at Islampur. The most was 252.0 mm (9.9 in) on 26 September 1960.
Record daily precipitation for each month at Islampur
MonthRecord daily precipitation (mm)Date
Jan57.4 mm (2.3 in)27 January 1929
Feb72.4 mm (2.9 in)4 February 1915
Mar57.2 mm (2.3 in)15 March 1939
Apr61.7 mm (2.4 in)13 April 1933
May88.9 mm (3.5 in)14 May 1918
Jun175.0 mm (6.9 in)20 June 1964
Jul160.0 mm (6.3 in)17 July 1926
Aug193.0 mm (7.6 in)10 August 1942
Sep252.0 mm (9.9 in)26 September 1960
Oct152.0 mm (6.0 in)2 October 1961
Nov86.4 mm (3.4 in)19 November 1915
Dec43.2 mm (1.7 in)13 December 1913

Latest Records

20
Latest records at Islampur
DateStationRecordValueBeat old record byOld record stoodSignificance
23 May 1970Islampur, INdaily rain10.0 mm (0.4 in)9.0 mm (0.35 in)61 years20 of 100 (Routine)
28 February 1970Islampur, INdaily rain3.0 mm (0.12 in)3.0 mm (0.12 in)66 years20 of 100 (Routine)
21 January 1970Islampur, INdaily rain25.0 mm (1.0 in)14.8 mm (0.6 in)36 years30 of 100 (Routine)
11 November 1969Islampur, INdaily rain5.0 mm (0.20 in)5.0 mm (0.20 in)66 years20 of 100 (Routine)
5 June 1969Islampur, INdaily rain33.0 mm (1.3 in)22.6 mm (0.9 in)47 years29 of 100 (Routine)
4 June 1969Islampur, INdaily rain38.0 mm (1.5 in)3.7 mm (0.15 in)47 years21 of 100 (Routine)
3 June 1969Islampur, INdaily rain72.0 mm (2.8 in)39.0 mm (1.5 in)47 years36 of 100 (Notable)
1 May 1969Islampur, INdaily rain35.8 mm (1.4 in)35.8 mm (1.4 in)64 years44 of 100 (Notable)
13 January 1969Islampur, INdaily rain8.0 mm (0.31 in)8.0 mm (0.31 in)65 years20 of 100 (Routine)
27 December 1968Islampur, INdaily rain10.0 mm (0.4 in)10.0 mm (0.4 in)65 years20 of 100 (Routine)
28 October 1968Islampur, INdaily rain16.0 mm (0.6 in)16.0 mm (0.6 in)65 years20 of 100 (Routine)
16 June 1968Islampur, INdaily rain65.0 mm (2.6 in)34.5 mm (1.4 in)59 years37 of 100 (Notable)
15 January 1968Islampur, INdaily rain56.0 mm (2.2 in)45.8 mm (1.8 in)14 years50 of 100 (Notable)
7 January 1968Islampur, INdaily rain18.0 mm (0.7 in)2.8 mm (0.11 in)42 years20 of 100 (Routine)
20 September 1967Islampur, INdaily rain187.0 mm (7.4 in)102.0 mm (4.0 in)8 years43 of 100 (Notable)
19 September 1967Islampur, INdaily rain130.0 mm (5.1 in)65.0 mm (2.6 in)8 years30 of 100 (Routine)
15 July 1967Islampur, INdaily rain120.0 mm (4.7 in)48.9 mm (1.9 in)36 years38 of 100 (Notable)
25 March 1967Islampur, INdaily rain19.0 mm (0.7 in)8.1 mm (0.32 in)18 years17 of 100 (Routine)
22 March 1967Islampur, INdaily rain29.0 mm (1.1 in)29.0 mm (1.1 in)62 years48 of 100 (Notable)
21 March 1967Islampur, INdaily rain11.0 mm (0.4 in)5.9 mm (0.23 in)49 years20 of 100 (Routine)

Extremes by Year

1903 to 1970
Yearly extremes at Islampur: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)252.0 mm (9.9 in)196088.9 mm (3.5 in)65
Wettest five days (Rx5day)373.2 mm (14.7 in)1960185.6 mm (7.3 in)65
Longest dry spell (CDD)171 days196490 days65

Wettest day (Rx1day)

Wettest day (Rx1day) at Islampur by year The wettest day of the year at Islampur, 1903 to 1970. The record is 252.0 mm (9.9 in) in 1960, marked on the chart; the median year is 88.9 mm (3.5 in). 0100200300192019401960Record: 252.0 mm (9.9 in) in 1960
The wettest day of the year at Islampur, 1903 to 1970. The record is 252.0 mm (9.9 in) in 1960, marked on the chart; the median year is 88.9 mm (3.5 in).
Wettest day (Rx1day) at Islampur by year
YearWettest day (Rx1day)
1903123.7 mm (4.9 in)
1904152.4 mm (6.0 in)
190596.5 mm (3.8 in)
190692.7 mm (3.6 in)
1907144.8 mm (5.7 in)
190850.8 mm (2.0 in)
190981.3 mm (3.2 in)
191088.9 mm (3.5 in)
191196.5 mm (3.8 in)
1912133.4 mm (5.3 in)
1913137.2 mm (5.4 in)
1914125.2 mm (4.9 in)
191586.4 mm (3.4 in)
1916116.8 mm (4.6 in)
191776.2 mm (3.0 in)
1918114.3 mm (4.5 in)
1919108.0 mm (4.3 in)
192090.4 mm (3.6 in)
192171.1 mm (2.8 in)
192280.0 mm (3.1 in)
1923116.8 mm (4.6 in)
1924127.0 mm (5.0 in)
192578.7 mm (3.1 in)
1926160.0 mm (6.3 in)
1927152.4 mm (6.0 in)
192864.3 mm (2.5 in)
1929122.2 mm (4.8 in)
193071.1 mm (2.8 in)
193173.7 mm (2.9 in)
193263.5 mm (2.5 in)
193366.0 mm (2.6 in)
193499.1 mm (3.9 in)
1935121.9 mm (4.8 in)
193675.4 mm (3.0 in)
193743.4 mm (1.7 in)
193880.0 mm (3.1 in)
193972.4 mm (2.9 in)
194079.0 mm (3.1 in)
194180.0 mm (3.1 in)
1942193.0 mm (7.6 in)
1943138.4 mm (5.4 in)
194457.2 mm (2.3 in)
194598.6 mm (3.9 in)
1946112.3 mm (4.4 in)
194783.8 mm (3.3 in)
194878.7 mm (3.1 in)
194973.2 mm (2.9 in)
195040.6 mm (1.6 in)
195178.7 mm (3.1 in)
195286.4 mm (3.4 in)
195391.4 mm (3.6 in)
195488.9 mm (3.5 in)
195582.6 mm (3.3 in)
195659.7 mm (2.4 in)
195763.5 mm (2.5 in)
1959105.0 mm (4.1 in)
1960252.0 mm (9.9 in)
1961200.0 mm (7.9 in)
1962120.0 mm (4.7 in)
1963147.0 mm (5.8 in)
1964175.0 mm (6.9 in)
1967187.0 mm (7.4 in)
196865.0 mm (2.6 in)
196977.0 mm (3.0 in)
197060.0 mm (2.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Islampur by year The wettest five days of the year at Islampur, 1903 to 1970. The record is 373.2 mm (14.7 in) in 1960, marked on the chart; the median year is 185.6 mm (7.3 in). 0100200300400192019401960Record: 373.2 mm (14.7 in) in 1960
The wettest five days of the year at Islampur, 1903 to 1970. The record is 373.2 mm (14.7 in) in 1960, marked on the chart; the median year is 185.6 mm (7.3 in).
Wettest five days (Rx5day) at Islampur by year
YearWettest five days (Rx5day)
1903141.7 mm (5.6 in)
1904200.5 mm (7.9 in)
1905230.5 mm (9.1 in)
1906116.6 mm (4.6 in)
1907252.0 mm (9.9 in)
190899.0 mm (3.9 in)
1909254.8 mm (10.0 in)
1910271.8 mm (10.7 in)
1911202.0 mm (8.0 in)
1912194.1 mm (7.6 in)
1913337.9 mm (13.3 in)
1914265.9 mm (10.5 in)
1915125.7 mm (4.9 in)
1916188.0 mm (7.4 in)
1917236.2 mm (9.3 in)
1918302.5 mm (11.9 in)
1919249.0 mm (9.8 in)
1920127.5 mm (5.0 in)
1921185.6 mm (7.3 in)
1922179.3 mm (7.1 in)
1923163.5 mm (6.4 in)
1924217.1 mm (8.5 in)
1925218.4 mm (8.6 in)
1926243.8 mm (9.6 in)
1927177.8 mm (7.0 in)
192872.7 mm (2.9 in)
1929179.1 mm (7.1 in)
1930119.4 mm (4.7 in)
1931113.1 mm (4.5 in)
1932193.0 mm (7.6 in)
1933245.0 mm (9.6 in)
1934162.4 mm (6.4 in)
1935352.5 mm (13.9 in)
1936158.0 mm (6.2 in)
1937101.7 mm (4.0 in)
1938149.9 mm (5.9 in)
1939149.9 mm (5.9 in)
1940133.5 mm (5.3 in)
1941214.4 mm (8.4 in)
1942368.8 mm (14.5 in)
1943326.1 mm (12.8 in)
1944128.0 mm (5.0 in)
1945212.4 mm (8.4 in)
1946168.1 mm (6.6 in)
1947108.7 mm (4.3 in)
1948188.0 mm (7.4 in)
1949213.7 mm (8.4 in)
195093.9 mm (3.7 in)
1951134.5 mm (5.3 in)
1952153.6 mm (6.0 in)
1953181.6 mm (7.1 in)
1954162.6 mm (6.4 in)
1955130.9 mm (5.2 in)
1956134.0 mm (5.3 in)
1957127.1 mm (5.0 in)
1959280.0 mm (11.0 in)
1960373.2 mm (14.7 in)
1961305.0 mm (12.0 in)
1962295.0 mm (11.6 in)
1963309.0 mm (12.2 in)
1964233.0 mm (9.2 in)
1967328.0 mm (12.9 in)
1968115.0 mm (4.5 in)
1969174.0 mm (6.9 in)
197088.0 mm (3.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Islampur by year The longest dry spell of the year at Islampur, 1903 to 1970. The record is 171 days in 1964, marked on the chart; the median year is 90 days. 050100150200192019401960Record: 171 days in 1964
The longest dry spell of the year at Islampur, 1903 to 1970. The record is 171 days in 1964, marked on the chart; the median year is 90 days.
Longest dry spell (CDD) at Islampur by year
YearLongest dry spell (CDD)
190361 days
190474 days
190592 days
190662 days
190797 days
190890 days
190989 days
191098 days
1911158 days
1912130 days
1913128 days
191466 days
1915103 days
1916112 days
191785 days
1918133 days
191947 days
1920102 days
192190 days
1922117 days
192388 days
1924114 days
192585 days
192679 days
192797 days
192894 days
192971 days
1930162 days
1931103 days
1932123 days
193367 days
1934142 days
1935131 days
193661 days
193787 days
1938128 days
193990 days
194087 days
194188 days
194275 days
194396 days
194473 days
194576 days
194654 days
1947123 days
194882 days
194964 days
1950140 days
195191 days
1952150 days
195392 days
1954125 days
1955121 days
195660 days
195780 days
195971 days
196095 days
196186 days
196287 days
196361 days
1964171 days
1967102 days
196872 days
196974 days
197086 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

58 years, 1904 to 1970

A day with at least 91.7 mm (3.6 in) of rain is expected about once in 2 years. A day with at least 263.8 mm (10.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Islampur: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years91.7 mm (3.6 in)
5 years127.6 mm (5.0 in)
10 years154.9 mm (6.1 in)
25 years194.3 mm (7.6 in)
50 years227.3 mm (8.9 in)
100 years263.8 mm (10.4 in)Longer than the 58 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, 58 years of values from 1904 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: 252.0 mm (9.9 in) in 1960; 200.0 mm (7.9 in) in 1961; 193.0 mm (7.6 in) in 1942.

Download the Data

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