Record envelope, standing records and threshold days for Grand Isle (USC00163807), Louisiana, United States, with 69 years of record.
Key Facts for Grand Isle
Grand Isle (USC00163807) is a weather station in Louisiana, United States at 29.24 latitude and -89.99 longitude, 1 m (2 ft) above sea level.
The station reports from 1947 to 2015, 69 years of record.
1,464 records set at Grand Isle still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Grand Isle set a daily record precipitation of 89.2 mm (3.5 in) on 27 September 2015.
About the Station
Location: Louisiana, United States, 29.24 latitude, -89.99 longitude.
Elevation: 1 m (2 ft).
Period of record: 1947 to 2015, 69 years.
Eligible elements: prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Grand Isle. 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 Grand Isle, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
29.4 C (84.9 F)
-8.9 C (16.0 F)
n/a
n/a
Feb
28.3 C (82.9 F)
-7.2 C (19.0 F)
n/a
n/a
Mar
31.7 C (89.1 F)
0.0 C (32.0 F)
n/a
n/a
Apr
32.2 C (90.0 F)
5.6 C (42.1 F)
n/a
n/a
May
35.6 C (96.1 F)
8.3 C (46.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
16.1 C (61.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
17.8 C (64.0 F)
n/a
n/a
Aug
38.3 C (100.9 F)
19.4 C (66.9 F)
n/a
n/a
Sep
36.1 C (97.0 F)
12.2 C (54.0 F)
n/a
n/a
Oct
35.6 C (96.1 F)
5.6 C (42.1 F)
n/a
n/a
Nov
31.7 C (89.1 F)
-1.1 C (30.0 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-3.3 C (26.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grand Isle still stand. 2011 holds the most, with 109.
Standing records at Grand Isle by the year they were set
Year set
Standing records
1949
62
1950
86
1951
101
1952
61
1953
62
1954
86
1955
86
1956
57
1957
82
1958
41
1959
65
1960
60
1961
67
1962
55
1963
40
1964
77
1965
56
1966
54
1967
49
2011
109
2012
47
2013
31
2014
30
Wettest Day of Each Month
Oct: 292.1 mm (11.5 in)
The wettest day on record for each calendar month at Grand Isle. The most was 292.1 mm (11.5 in) on 30 October 1967.
Record daily precipitation for each month at Grand Isle
Month
Record daily precipitation (mm)
Date
Jan
213.6 mm (8.4 in)
13 January 1992
Feb
120.7 mm (4.8 in)
25 February 1959
Mar
158.2 mm (6.2 in)
21 March 1985
Apr
228.6 mm (9.0 in)
30 April 1991
May
119.1 mm (4.7 in)
30 May 2005
Jun
188.0 mm (7.4 in)
15 June 1985
Jul
161.8 mm (6.4 in)
6 July 2005
Aug
215.9 mm (8.5 in)
12 August 1949
Sep
232.7 mm (9.2 in)
26 September 2002
Oct
292.1 mm (11.5 in)
30 October 1967
Nov
152.7 mm (6.0 in)
1 November 1948
Dec
180.1 mm (7.1 in)
6 December 1953
Period of Record Coverage
1949 to 2014
Complete yearUnder 90 percent of days
23 years of record at Grand Isle, 1949 to 2014. 12 years have data for under 90 percent of days and are left out of rankings: 1949, 1950, 1958, 1959, 1962, 1963, 1964, 1965 and others.
Yearly extremes at Grand Isle: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1954
36.1 C (97.0 F)
23
Coldest night (TNn)
-8.9 C (16.0 F)
1962
-1.7 C (28.9 F)
23
Wettest day (Rx1day)
292.1 mm (11.5 in)
1967
104.2 mm (4.1 in)
48
Wettest five days (Rx5day)
330.5 mm (13.0 in)
1985
176.0 mm (6.9 in)
48
Longest dry spell (CDD)
62 days
1993
26 days
48
Hottest day (TXx)
The hottest day of the year at Grand Isle, 1947 to 2015. The record is 38.3 C (100.9 F) in 1954, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Grand Isle by year
Year
Hottest day (TXx)
1947
n/a
1948
n/a
1949
37.8 C (100.0 F)
1950
36.1 C (97.0 F)
1951
36.1 C (97.0 F)
1952
35.6 C (96.1 F)
1953
36.7 C (98.1 F)
1954
38.3 C (100.9 F)
1955
36.1 C (97.0 F)
1956
36.1 C (97.0 F)
1957
35.6 C (96.1 F)
1958
36.7 C (98.1 F)
1959
36.1 C (97.0 F)
1960
37.8 C (100.0 F)
1961
34.4 C (93.9 F)
1962
37.8 C (100.0 F)
1963
36.7 C (98.1 F)
1964
35.6 C (96.1 F)
1965
35.0 C (95.0 F)
1966
35.6 C (96.1 F)
1967
35.6 C (96.1 F)
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1995
n/a
1996
n/a
1997
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
n/a
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
35.6 C (96.1 F)
2012
33.9 C (93.0 F)
2013
36.7 C (98.1 F)
2014
32.8 C (91.0 F)
2015
n/a
Coldest night (TNn)
The coldest night of the year at Grand Isle, 1947 to 2015. The record is -8.9 C (16.0 F) in 1962, marked on the chart; the median year is -1.7 C (28.9 F).
Coldest night (TNn) at Grand Isle by year
Year
Coldest night (TNn)
1947
n/a
1948
n/a
1949
2.8 C (37.0 F)
1950
-2.2 C (28.0 F)
1951
-7.2 C (19.0 F)
1952
-0.6 C (30.9 F)
1953
1.7 C (35.1 F)
1954
0.0 C (32.0 F)
1955
-2.2 C (28.0 F)
1956
-0.6 C (30.9 F)
1957
-1.1 C (30.0 F)
1958
-1.7 C (28.9 F)
1959
-1.1 C (30.0 F)
1960
-0.6 C (30.9 F)
1961
-2.2 C (28.0 F)
1962
-8.9 C (16.0 F)
1963
-3.3 C (26.1 F)
1964
-3.3 C (26.1 F)
1965
-1.7 C (28.9 F)
1966
-7.2 C (19.0 F)
1967
1.1 C (34.0 F)
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1995
n/a
1996
n/a
1997
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
n/a
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
-1.7 C (28.9 F)
2012
3.3 C (37.9 F)
2013
2.8 C (37.0 F)
2014
-3.3 C (26.1 F)
2015
n/a
Wettest day (Rx1day)
The wettest day of the year at Grand Isle, 1947 to 2015. The record is 292.1 mm (11.5 in) in 1967, marked on the chart; the median year is 104.2 mm (4.1 in).
Wettest day (Rx1day) at Grand Isle by year
Year
Wettest day (Rx1day)
1947
98.0 mm (3.9 in)
1948
198.9 mm (7.8 in)
1949
215.9 mm (8.5 in)
1950
200.7 mm (7.9 in)
1951
96.0 mm (3.8 in)
1952
79.5 mm (3.1 in)
1953
180.1 mm (7.1 in)
1954
152.4 mm (6.0 in)
1955
114.3 mm (4.5 in)
1956
75.4 mm (3.0 in)
1957
110.7 mm (4.4 in)
1958
152.4 mm (6.0 in)
1959
120.7 mm (4.8 in)
1960
222.3 mm (8.8 in)
1961
141.5 mm (5.6 in)
1962
77.5 mm (3.1 in)
1963
68.1 mm (2.7 in)
1964
96.5 mm (3.8 in)
1965
81.3 mm (3.2 in)
1966
106.7 mm (4.2 in)
1967
292.1 mm (11.5 in)
1985
188.0 mm (7.4 in)
1986
69.6 mm (2.7 in)
1987
73.7 mm (2.9 in)
1988
101.6 mm (4.0 in)
1990
110.5 mm (4.4 in)
1991
228.6 mm (9.0 in)
1992
213.6 mm (8.4 in)
1993
111.8 mm (4.4 in)
1995
127.0 mm (5.0 in)
1996
94.0 mm (3.7 in)
1997
101.6 mm (4.0 in)
1999
97.5 mm (3.8 in)
2000
50.0 mm (2.0 in)
2001
68.6 mm (2.7 in)
2002
232.7 mm (9.2 in)
2003
109.5 mm (4.3 in)
2004
131.1 mm (5.2 in)
2005
161.8 mm (6.4 in)
2006
78.7 mm (3.1 in)
2007
95.8 mm (3.8 in)
2008
93.5 mm (3.7 in)
2009
n/a
2010
99.1 mm (3.9 in)
2011
167.6 mm (6.6 in)
2012
99.1 mm (3.9 in)
2013
58.4 mm (2.3 in)
2014
63.5 mm (2.5 in)
2015
89.2 mm (3.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grand Isle, 1947 to 2015. The record is 330.5 mm (13.0 in) in 1985, marked on the chart; the median year is 176.0 mm (6.9 in).
Wettest five days (Rx5day) at Grand Isle by year
Year
Wettest five days (Rx5day)
1947
157.3 mm (6.2 in)
1948
239.0 mm (9.4 in)
1949
250.9 mm (9.9 in)
1950
239.0 mm (9.4 in)
1951
137.2 mm (5.4 in)
1952
147.4 mm (5.8 in)
1953
248.9 mm (9.8 in)
1954
188.0 mm (7.4 in)
1955
132.9 mm (5.2 in)
1956
173.0 mm (6.8 in)
1957
171.9 mm (6.8 in)
1958
200.7 mm (7.9 in)
1959
177.6 mm (7.0 in)
1960
317.8 mm (12.5 in)
1961
186.7 mm (7.4 in)
1962
102.1 mm (4.0 in)
1963
90.7 mm (3.6 in)
1964
128.3 mm (5.1 in)
1965
81.3 mm (3.2 in)
1966
205.0 mm (8.1 in)
1967
309.9 mm (12.2 in)
1985
330.5 mm (13.0 in)
1986
105.9 mm (4.2 in)
1987
114.1 mm (4.5 in)
1988
247.9 mm (9.8 in)
1990
147.6 mm (5.8 in)
1991
275.8 mm (10.9 in)
1992
252.5 mm (9.9 in)
1993
188.3 mm (7.4 in)
1995
241.3 mm (9.5 in)
1996
161.2 mm (6.3 in)
1997
157.2 mm (6.2 in)
1999
127.9 mm (5.0 in)
2000
83.4 mm (3.3 in)
2001
138.0 mm (5.4 in)
2002
277.4 mm (10.9 in)
2003
197.2 mm (7.8 in)
2004
311.4 mm (12.3 in)
2005
258.1 mm (10.2 in)
2006
128.5 mm (5.1 in)
2007
158.8 mm (6.3 in)
2008
179.4 mm (7.1 in)
2009
n/a
2010
174.3 mm (6.9 in)
2011
287.0 mm (11.3 in)
2012
195.6 mm (7.7 in)
2013
147.0 mm (5.8 in)
2014
135.1 mm (5.3 in)
2015
165.3 mm (6.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grand Isle, 1947 to 2015. The record is 62 days in 1993, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at Grand Isle by year
Year
Longest dry spell (CDD)
1947
21 days
1948
36 days
1949
29 days
1950
17 days
1951
28 days
1952
30 days
1953
23 days
1954
26 days
1955
31 days
1956
20 days
1957
26 days
1958
24 days
1959
22 days
1960
33 days
1961
21 days
1962
44 days
1963
24 days
1964
23 days
1965
24 days
1966
15 days
1967
24 days
1985
23 days
1986
20 days
1987
26 days
1988
25 days
1990
23 days
1991
18 days
1992
34 days
1993
62 days
1995
16 days
1996
31 days
1997
27 days
1999
35 days
2000
30 days
2001
28 days
2002
57 days
2003
40 days
2004
33 days
2005
18 days
2006
34 days
2007
28 days
2008
22 days
2009
n/a
2010
28 days
2011
28 days
2012
19 days
2013
24 days
2014
31 days
2015
22 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.
Download the Data
Data for Grand Isle standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grand Isle 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.