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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Grand Isle Threshold Days by Year (USC00163807)

13 fixed thresholds counted per year at Grand Isle (USC00163807): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grand Isle Thresholds

  • Grand Isle: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1991 with 63.
  • Grand Isle: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 1991 with 33.
  • Grand Isle: days with 50 mm (1.97 in) or more of precipitation in 28 years, most in 1991 with 12.
  • Grand Isle: days with 100 mm (3.94 in) or more of precipitation in 18 years, most in 1985 with 6.
  • 13 fixed thresholds have at least one qualifying day at Grand Isle.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Grand Isle Days per year at Grand Isle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 151 in 1953. 0501001502001951: 1291952: 1161953: 1511954: 1401955: 1481956: 1441957: 1311960: 1261961: 1112011: 1442013: 125195119531955195719612013
Days per year at Grand Isle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 151 in 1953.
Days at or above 30 C (86 F) per year at Grand Isle
YearDaysDecade average
1951129137
1952116137
1953151137
1954140137
1955148137
1956144137
1957131137
1960126118.5
1961111118.5
2011144134.5
2013125134.5
First to last qualifying date each year at Grand Isle For each year, a bar from the first to the last day at Grand Isle meeting 30 C (86 F). 1951: 6 May 1951 to 26 October 19511952: 30 April 1952 to 5 October 19521953: 10 April 1953 to 25 October 19531954: 10 April 1954 to 25 October 19541955: 28 April 1955 to 13 October 19551956: 6 April 1956 to 1 November 19561957: 14 May 1957 to 15 October 19571960: 23 May 1960 to 17 October 19601961: 20 May 1961 to 13 October 19612011: 27 March 2011 to 17 December 20112013: 10 May 2013 to 13 October 2013195119531955195719612013JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Grand Isle meeting 30 C (86 F).
First to last qualifying date each year at Grand Isle
YearFirst dateLast date
19511951-05-061951-10-26
19521952-04-301952-10-05
19531953-04-101953-10-25
19541954-04-101954-10-25
19551955-04-281955-10-13
19561956-04-061956-11-01
19571957-05-141957-10-15
19601960-05-231960-10-17
19611961-05-201961-10-13
20112011-03-272011-12-17
20132013-05-102013-10-13

Every Fixed Threshold

Fixed thresholds at Grand Isle
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days111511953125
35 C (95 F): Days103019517
90 F (32.2 C): Days11104195482
100 F (37.8 C): Days2119541
0 C (32 F): Ice days (max1119511
0 C (32 F): Frost days (min9619615
20 C (68 F): Tropical nights (min111641953154
25 C (77 F): Days with min1164195455
10 mm (0.39 in): Days with 10 mm or more rain2863199147
25 mm (0.98 in): Days with 25 mm or more rain2833199122
50 mm (1.97 in): Days with 50 mm or more rain281219912
100 mm (3.94 in): Days with 100 mm or more rain18619852
200 mm (7.87 in): Days with 200 mm or more rain5119601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

  • 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).