Nagappattinam Weather Records (IN020120700)

Record envelope, standing records and threshold days for Nagappattinam (IN020120700), India, with 126 years of record.

Key Facts for Nagappattinam

Nagappattinam (IN020120700) is a weather station in India at 10.77 latitude and 79.85 longitude, 9 m (30 ft) above sea level.
The station reports from 1901 to 2026, 126 years of record.
1,464 records set at Nagappattinam still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Nagappattinam set a daily record precipitation of 86.1 mm (3.4 in) on 12 December 2024.

About the Station

Location: India, 10.77 latitude, 79.85 longitude.
Elevation: 9 m (30 ft).
Period of record: 1901 to 2026, 126 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

19 days at or beyond a record

The band shows the record high and record low for each calendar day at Nagappattinam. The lines show the 2026 daily maximum and minimum. 19 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Nagappattinam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.8 C (91.0 F)	18.0 C (64.4 F)	29.6 C (85.3 F)	23.2 C (73.8 F)
Feb	33.1 C (91.6 F)	18.5 C (65.3 F)	31.4 C (88.5 F)	21.2 C (70.2 F)
Mar	37.6 C (99.7 F)	19.0 C (66.2 F)	33.8 C (92.8 F)	24.0 C (75.2 F)
Apr	39.9 C (103.8 F)	22.1 C (71.8 F)	37.2 C (99.0 F)	24.0 C (75.2 F)
May	43.2 C (109.8 F)	22.2 C (72.0 F)	37.4 C (99.3 F)	24.0 C (75.2 F)
Jun	41.2 C (106.2 F)	22.5 C (72.5 F)	37.6 C (99.7 F)	23.8 C (74.8 F)
Jul	40.0 C (104.0 F)	22.0 C (71.6 F)	38.6 C (101.5 F)	26.4 C (79.5 F)
Aug	39.2 C (102.6 F)	21.6 C (70.9 F)	36.2 C (97.2 F)	23.0 C (73.4 F)
Sep	39.8 C (103.6 F)	21.8 C (71.2 F)	35.4 C (95.7 F)	23.2 C (73.8 F)
Oct	37.3 C (99.1 F)	22.2 C (72.0 F)	35.0 C (95.0 F)	24.0 C (75.2 F)
Nov	34.4 C (93.9 F)	20.7 C (69.3 F)	34.4 C (93.9 F)	22.4 C (72.3 F)
Dec	36.0 C (96.8 F)	18.5 C (65.3 F)	29.4 C (84.9 F)	20.8 C (69.4 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Nagappattinam still stand. 2025 holds the most, with 227.

All-Time Record Progression

1 new records

1 all-time records were set at Nagappattinam between 5 December 1963 and 5 December 1963. Each dot is a new record.

Wettest Day of Each Month

Dec: 402.6 mm (15.9 in)

The wettest day on record for each calendar month at Nagappattinam. The most was 402.6 mm (15.9 in) on 5 December 1963.

Record daily precipitation for each month at Nagappattinam
Month	Record daily precipitation (mm)	Date
Jan	245.1 mm (9.6 in)	13 January 1923
Feb	125.0 mm (4.9 in)	7 February 1938
Mar	126.5 mm (5.0 in)	14 March 1923
Apr	151.6 mm (6.0 in)	14 April 1931
May	164.1 mm (6.5 in)	7 May 1930
Jun	79.2 mm (3.1 in)	12 June 1935
Jul	113.0 mm (4.4 in)	23 July 1916
Aug	150.0 mm (5.9 in)	13 August 1970
Sep	78.7 mm (3.1 in)	10 September 1921
Oct	397.8 mm (15.7 in)	23 October 1930
Nov	365.5 mm (14.4 in)	18 November 1918
Dec	402.6 mm (15.9 in)	5 December 1963

Period of Record Coverage

2010 to 2025

16 years of record at Nagappattinam, 2010 to 2025. 9 years have data for under 90 percent of days and are left out of rankings: 2010, 2011, 2012, 2013, 2014, 2015, 2020, 2021 and others.

Days with data per year at Nagappattinam
Year	Days with data	Share of year	Complete
2010	24	7%	No
2011	275	75%	No
2012	283	77%	No
2013	281	77%	No
2014	279	76%	No
2015	272	75%	No
2016	358	98%	Yes
2017	364	100%	Yes
2018	361	99%	Yes
2019	347	95%	Yes
2020	277	76%	No
2021	312	85%	No
2022	351	96%	Yes
2023	350	96%	Yes
2024	325	89%	No
2025	344	94%	Yes

Latest Records

Latest records at Nagappattinam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 December 2024	Nagappattinam, IN	daily rain	86.1 mm (3.4 in)	6.1 mm (0.24 in)	84 years	36 of 100 (Notable)
27 November 2024	Nagappattinam, IN	daily rain	180.1 mm (7.1 in)	20.1 mm (0.8 in)	14 years	19 of 100 (Routine)
17 December 2023	Nagappattinam, IN	daily rain	51.1 mm (2.0 in)	9.6 mm (0.38 in)	54 years	28 of 100 (Routine)
19 June 2023	Nagappattinam, IN	daily rain	13.0 mm (0.5 in)	0.6 mm (0.02 in)	97 years	20 of 100 (Routine)
6 June 2023	Nagappattinam, IN	daily rain	41.9 mm (1.6 in)	6.8 mm (0.27 in)	5 years	16 of 100 (Routine)
20 March 2023	Nagappattinam, IN	daily rain	13.0 mm (0.5 in)	5.9 mm (0.23 in)	86 years	20 of 100 (Routine)
3 February 2023	Nagappattinam, IN	daily rain	87.9 mm (3.5 in)	65.3 mm (2.6 in)	60 years	57 of 100 (Notable)
2 February 2023	Nagappattinam, IN	daily rain	36.1 mm (1.4 in)	21.9 mm (0.9 in)	95 years	47 of 100 (Notable)
1 February 2023	Nagappattinam, IN	daily rain	3.0 mm (0.12 in)	1.5 mm (0.06 in)	68 years	20 of 100 (Routine)
26 September 2022	Nagappattinam, IN	daily rain	72.9 mm (2.9 in)	11.1 mm (0.4 in)	60 years	35 of 100 (Notable)
26 August 2022	Nagappattinam, IN	daily rain	48.0 mm (1.9 in)	22.4 mm (0.9 in)	53 years	40 of 100 (Notable)
23 August 2022	Nagappattinam, IN	daily rain	103.1 mm (4.1 in)	39.1 mm (1.5 in)	116 years	64 of 100 (Major)
7 March 2022	Nagappattinam, IN	daily rain	22.1 mm (0.9 in)	21.3 mm (0.8 in)	8 years	20 of 100 (Routine)
12 February 2022	Nagappattinam, IN	daily rain	99.1 mm (3.9 in)	61.8 mm (2.4 in)	79 years	62 of 100 (Major)
11 February 2022	Nagappattinam, IN	daily rain	22.1 mm (0.9 in)	13.0 mm (0.5 in)	95 years	20 of 100 (Routine)
30 January 2022	Nagappattinam, IN	daily rain	30.0 mm (1.2 in)	21.1 mm (0.8 in)	112 years	48 of 100 (Notable)
26 November 2021	Nagappattinam, IN	daily rain	186.9 mm (7.4 in)	57.9 mm (2.3 in)	11 years	27 of 100 (Routine)
10 November 2021	Nagappattinam, IN	daily rain	309.9 mm (12.2 in)	175.8 mm (6.9 in)	114 years	80 of 100 (Exceptional)
29 October 2021	Nagappattinam, IN	daily rain	121.9 mm (4.8 in)	23.9 mm (0.9 in)	8 years	20 of 100 (Routine)
18 July 2021	Nagappattinam, IN	daily rain	59.9 mm (2.4 in)	17.9 mm (0.7 in)	60 years	40 of 100 (Notable)

Climate Trend

10 complete years, 2011 to 2025

One stripe for each of 10 complete years at Nagappattinam, 2011 to 2025. Blue stripes are years cooler than the station's own mean of 29.4 C (84.9 F); red stripes are warmer. The coolest year was 2011, at 29.0 C (84.3 F), and the warmest was 2019, at 29.8 C (85.6 F). The strongest colour marks a difference of 0.5 C (0.9 F).

Annual mean temperature at Nagappattinam as warming stripes, 2011 to 2025
Year	Annual mean temperature	Difference from the station mean
2011	29.0 C	-0.36 C
2012	29.5 C	+0.07 C
2013	29.3 C	-0.05 C
2016	29.8 C	+0.36 C
2017	29.6 C	+0.22 C
2018	29.4 C	+0.02 C
2019	29.8 C	+0.36 C
2021	29.2 C	-0.18 C
2022	29.2 C	-0.21 C
2025	29.1 C	-0.28 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1901 to 2026

Yearly extremes at Nagappattinam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.2 C (109.8 F)	2020	40.0 C (104.0 F)	17
Coldest night (TNn)	18.0 C (64.4 F)	2012	19.4 C (66.9 F)	18
Wettest day (Rx1day)	402.6 mm (15.9 in)	1963	131.6 mm (5.2 in)	87
Wettest five days (Rx5day)	660.9 mm (26.0 in)	1930	266.9 mm (10.5 in)	87
Longest dry spell (CDD)	144 days	1964	51 days	87

Hottest day (TXx)

The hottest day of the year at Nagappattinam, 1901 to 2026. The record is 43.2 C (109.8 F) in 2020, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Nagappattinam by year
Year	Hottest day (TXx)
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
2009	n/a
2010	32.9 C (91.2 F)
2011	39.8 C (103.6 F)
2012	40.5 C (104.9 F)
2013	40.6 C (105.1 F)
2014	40.1 C (104.2 F)
2015	40.0 C (104.0 F)
2016	39.1 C (102.4 F)
2017	41.1 C (106.0 F)
2018	39.4 C (102.9 F)
2019	41.2 C (106.2 F)
2020	43.2 C (109.8 F)
2021	39.1 C (102.4 F)
2022	38.8 C (101.8 F)
2023	40.3 C (104.5 F)
2024	40.3 C (104.5 F)
2025	38.6 C (101.5 F)
2026	39.6 C (103.3 F)

Coldest night (TNn)

The coldest night of the year at Nagappattinam, 1901 to 2026. The record is 18.0 C (64.4 F) in 2012, marked on the chart; the median year is 19.4 C (66.9 F).

Coldest night (TNn) at Nagappattinam by year
Year	Coldest night (TNn)
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
2009	21.4 C (70.5 F)
2010	19.0 C (66.2 F)
2011	18.5 C (65.3 F)
2012	18.0 C (64.4 F)
2013	19.3 C (66.7 F)
2014	18.5 C (65.3 F)
2015	19.5 C (67.1 F)
2016	19.0 C (66.2 F)
2017	19.0 C (66.2 F)
2018	19.3 C (66.7 F)
2019	19.5 C (67.1 F)
2020	20.3 C (68.5 F)
2021	19.9 C (67.8 F)
2022	18.5 C (65.3 F)
2023	19.9 C (67.8 F)
2024	20.5 C (68.9 F)
2025	20.8 C (69.4 F)
2026	20.7 C (69.3 F)

Wettest day (Rx1day)

The wettest day of the year at Nagappattinam, 1901 to 2026. The record is 402.6 mm (15.9 in) in 1963, marked on the chart; the median year is 131.6 mm (5.2 in).

Wettest day (Rx1day) at Nagappattinam by year
Year	Wettest day (Rx1day)
1901	85.6 mm (3.4 in)
1902	97.8 mm (3.9 in)
1903	115.3 mm (4.5 in)
1904	130.0 mm (5.1 in)
1905	113.8 mm (4.5 in)
1906	204.7 mm (8.1 in)
1907	134.1 mm (5.3 in)
1908	146.3 mm (5.8 in)
1909	64.8 mm (2.6 in)
1910	90.7 mm (3.6 in)
1911	205.7 mm (8.1 in)
1912	233.2 mm (9.2 in)
1913	272.8 mm (10.7 in)
1914	106.7 mm (4.2 in)
1915	73.7 mm (2.9 in)
1916	113.0 mm (4.4 in)
1917	163.8 mm (6.4 in)
1918	365.5 mm (14.4 in)
1919	205.5 mm (8.1 in)
1920	193.0 mm (7.6 in)
1921	94.7 mm (3.7 in)
1922	64.0 mm (2.5 in)
1923	245.1 mm (9.6 in)
1924	121.2 mm (4.8 in)
1925	100.3 mm (3.9 in)
1926	131.6 mm (5.2 in)
1927	93.0 mm (3.7 in)
1928	107.2 mm (4.2 in)
1929	112.0 mm (4.4 in)
1930	397.8 mm (15.7 in)
1931	366.8 mm (14.4 in)
1932	309.4 mm (12.2 in)
1933	118.6 mm (4.7 in)
1934	141.2 mm (5.6 in)
1935	202.4 mm (8.0 in)
1936	117.9 mm (4.6 in)
1937	121.4 mm (4.8 in)
1938	125.0 mm (4.9 in)
1939	140.7 mm (5.5 in)
1940	263.1 mm (10.4 in)
1941	128.8 mm (5.1 in)
1942	66.5 mm (2.6 in)
1943	151.4 mm (6.0 in)
1944	196.3 mm (7.7 in)
1945	93.0 mm (3.7 in)
1946	120.9 mm (4.8 in)
1947	74.7 mm (2.9 in)
1948	127.5 mm (5.0 in)
1949	55.6 mm (2.2 in)
1950	149.1 mm (5.9 in)
1951	90.2 mm (3.6 in)
1952	103.6 mm (4.1 in)
1953	70.4 mm (2.8 in)
1954	149.1 mm (5.9 in)
1955	136.4 mm (5.4 in)
1956	216.9 mm (8.5 in)
1957	139.7 mm (5.5 in)
1958	198.0 mm (7.8 in)
1959	137.4 mm (5.4 in)
1960	240.4 mm (9.5 in)
1961	102.6 mm (4.0 in)
1962	119.6 mm (4.7 in)
1963	402.6 mm (15.9 in)
1964	65.5 mm (2.6 in)
1965	143.2 mm (5.6 in)
1966	120.4 mm (4.7 in)
1967	171.7 mm (6.8 in)
1968	66.0 mm (2.6 in)
1969	154.6 mm (6.1 in)
1970	237.5 mm (9.4 in)
2009	177.0 mm (7.0 in)
2010	160.0 mm (6.3 in)
2011	90.9 mm (3.6 in)
2012	109.0 mm (4.3 in)
2013	79.0 mm (3.1 in)
2014	89.9 mm (3.5 in)
2015	194.1 mm (7.6 in)
2016	136.9 mm (5.4 in)
2017	104.9 mm (4.1 in)
2018	166.9 mm (6.6 in)
2019	138.9 mm (5.5 in)
2020	158.0 mm (6.2 in)
2021	309.9 mm (12.2 in)
2022	103.1 mm (4.1 in)
2023	146.1 mm (5.8 in)
2024	180.1 mm (7.1 in)
2025	n/a
2026	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at Nagappattinam, 1901 to 2026. The record is 660.9 mm (26.0 in) in 1930, marked on the chart; the median year is 266.9 mm (10.5 in).

Wettest five days (Rx5day) at Nagappattinam by year
Year	Wettest five days (Rx5day)
1901	196.6 mm (7.7 in)
1902	244.7 mm (9.6 in)
1903	204.9 mm (8.1 in)
1904	334.9 mm (13.2 in)
1905	167.9 mm (6.6 in)
1906	508.5 mm (20.0 in)
1907	282.6 mm (11.1 in)
1908	379.6 mm (14.9 in)
1909	127.8 mm (5.0 in)
1910	190.5 mm (7.5 in)
1911	469.3 mm (18.5 in)
1912	399.5 mm (15.7 in)
1913	442.7 mm (17.4 in)
1914	237.4 mm (9.3 in)
1915	185.7 mm (7.3 in)
1916	151.6 mm (6.0 in)
1917	366.7 mm (14.4 in)
1918	500.8 mm (19.7 in)
1919	415.1 mm (16.3 in)
1920	567.2 mm (22.3 in)
1921	238.3 mm (9.4 in)
1922	145.7 mm (5.7 in)
1923	510.6 mm (20.1 in)
1924	331.5 mm (13.1 in)
1925	207.0 mm (8.1 in)
1926	180.9 mm (7.1 in)
1927	126.6 mm (5.0 in)
1928	329.0 mm (13.0 in)
1929	199.9 mm (7.9 in)
1930	660.9 mm (26.0 in)
1931	535.7 mm (21.1 in)
1932	543.1 mm (21.4 in)
1933	269.9 mm (10.6 in)
1934	266.9 mm (10.5 in)
1935	376.7 mm (14.8 in)
1936	161.1 mm (6.3 in)
1937	309.8 mm (12.2 in)
1938	226.8 mm (8.9 in)
1939	284.8 mm (11.2 in)
1940	528.5 mm (20.8 in)
1941	183.2 mm (7.2 in)
1942	131.2 mm (5.2 in)
1943	368.3 mm (14.5 in)
1944	399.8 mm (15.7 in)
1945	265.8 mm (10.5 in)
1946	208.1 mm (8.2 in)
1947	148.7 mm (5.9 in)
1948	297.4 mm (11.7 in)
1949	99.1 mm (3.9 in)
1950	262.1 mm (10.3 in)
1951	161.6 mm (6.4 in)
1952	150.9 mm (5.9 in)
1953	179.8 mm (7.1 in)
1954	220.5 mm (8.7 in)
1955	280.1 mm (11.0 in)
1956	263.1 mm (10.4 in)
1957	341.8 mm (13.5 in)
1958	371.1 mm (14.6 in)
1959	307.3 mm (12.1 in)
1960	635.6 mm (25.0 in)
1961	134.0 mm (5.3 in)
1962	163.7 mm (6.4 in)
1963	652.0 mm (25.7 in)
1964	136.5 mm (5.4 in)
1965	389.4 mm (15.3 in)
1966	221.4 mm (8.7 in)
1967	533.5 mm (21.0 in)
1968	97.9 mm (3.9 in)
1969	380.4 mm (15.0 in)
1970	466.8 mm (18.4 in)
2009	420.8 mm (16.6 in)
2010	372.0 mm (14.6 in)
2011	231.9 mm (9.1 in)
2012	435.9 mm (17.2 in)
2013	232.9 mm (9.2 in)
2014	297.9 mm (11.7 in)
2015	456.0 mm (18.0 in)
2016	180.1 mm (7.1 in)
2017	346.3 mm (13.6 in)
2018	249.0 mm (9.8 in)
2019	262.6 mm (10.3 in)
2020	466.1 mm (18.4 in)
2021	390.9 mm (15.4 in)
2022	166.1 mm (6.5 in)
2023	261.1 mm (10.3 in)
2024	251.2 mm (9.9 in)
2025	n/a
2026	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at Nagappattinam, 1901 to 2026. The record is 144 days in 1964, marked on the chart; the median year is 51 days.

Longest dry spell (CDD) at Nagappattinam by year
Year	Longest dry spell (CDD)
1901	46 days
1902	61 days
1903	88 days
1904	74 days
1905	78 days
1906	72 days
1907	31 days
1908	41 days
1909	57 days
1910	107 days
1911	87 days
1912	114 days
1913	118 days
1914	51 days
1915	39 days
1916	92 days
1917	37 days
1918	51 days
1919	42 days
1920	58 days
1921	75 days
1922	56 days
1923	54 days
1924	72 days
1925	45 days
1926	79 days
1927	42 days
1928	51 days
1929	49 days
1930	30 days
1931	43 days
1932	57 days
1933	34 days
1934	57 days
1935	66 days
1936	60 days
1937	74 days
1938	33 days
1939	54 days
1940	30 days
1941	30 days
1942	76 days
1943	36 days
1944	49 days
1945	51 days
1946	52 days
1947	61 days
1948	40 days
1949	129 days
1950	46 days
1951	65 days
1952	53 days
1953	54 days
1954	51 days
1955	63 days
1956	64 days
1957	97 days
1958	78 days
1959	80 days
1960	41 days
1961	109 days
1962	80 days
1963	46 days
1964	144 days
1965	56 days
1966	62 days
1967	59 days
1968	92 days
1969	55 days
1970	41 days
2009	3 days
2010	4 days
2011	4 days
2012	4 days
2013	4 days
2014	3 days
2015	5 days
2016	6 days
2017	3 days
2018	3 days
2019	4 days
2020	3 days
2021	3 days
2022	4 days
2023	4 days
2024	5 days
2025	n/a
2026	34 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

69 years, 1901 to 1970

A day with at least 130.5 mm (5.1 in) of rain is expected about once in 2 years. A day with at least 450.1 mm (17.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Nagappattinam: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	130.5 mm (5.1 in)
5 years	192.9 mm (7.6 in)
10 years	242.1 mm (9.5 in)
25 years	315.2 mm (12.4 in)
50 years	378.5 mm (14.9 in)
100 years	450.1 mm (17.7 in)	Longer than the 69 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, 69 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: 402.6 mm (15.9 in) in 1963; 397.8 mm (15.7 in) in 1930; 365.5 mm (14.4 in) in 1918.

Download the Data

Data for Nagappattinam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Nagappattinam 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).