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Built 2026-10-19 (19 October 2026)

Ivan Threshold Days by Year (USC00204153)

16 fixed thresholds counted per year at Ivan (USC00204153): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ivan Thresholds

  • Ivan: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1898 with 36.
  • Ivan: days with 10 cm (3.9 in) or more of snowfall in 26 years, most in 1898 with 12.
  • Ivan: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1898 with 9.
  • Ivan: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1895 with 44.
  • 16 fixed thresholds have at least one qualifying day at Ivan.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Ivan Days per year at Ivan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 44 in 1895. 02040601895: 441896: 301898: 291900: 181901: 191902: 41903: 41904: 41905: 161906: 321907: 141908: 341909: 261910: 251911: 271912: 101913: 191914: 161915: 61916: 331917: 101919: 331920: 81921: 3618951900190319061909191219151919
Days per year at Ivan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 44 in 1895.
Days at or above 30 C (86 F) per year at Ivan
YearDaysDecade average
18954434.3
18963034.3
18982934.3
19001817.1
19011917.1
1902417.1
1903417.1
1904417.1
19051617.1
19063217.1
19071417.1
19083417.1
19092617.1
19102519.9
19112719.9
19121019.9
19131919.9
19141619.9
1915619.9
19163319.9
19171019.9
19193319.9
1920822
19213622
First to last qualifying date each year at Ivan For each year, a bar from the first to the last day at Ivan meeting 30 C (86 F). 1895: 4 May 1895 to 22 September 18951896: 10 May 1896 to 15 August 18961898: 4 June 1898 to 29 September 18981900: 24 June 1900 to 11 September 19001901: 14 June 1901 to 6 September 19011902: 19 May 1902 to 13 July 19021903: 4 July 1903 to 24 July 19031904: 24 June 1904 to 18 July 19041905: 15 June 1905 to 30 September 19051906: 17 May 1906 to 19 September 19061907: 16 June 1907 to 1 September 19071908: 24 May 1908 to 27 September 19081909: 21 June 1909 to 14 September 19091910: 15 June 1910 to 22 August 19101911: 19 May 1911 to 1 September 19111912: 25 June 1912 to 9 September 19121913: 14 June 1913 to 7 September 19131914: 26 May 1914 to 31 August 19141915: 24 April 1915 to 4 September 19151916: 6 July 1916 to 6 September 19161917: 21 July 1917 to 1 August 19171919: 28 May 1919 to 8 September 19191920: 31 May 1920 to 25 September 19201921: 21 May 1921 to 6 August 192118951900190319061909191219151919JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ivan meeting 30 C (86 F).
First to last qualifying date each year at Ivan
YearFirst dateLast date
18951895-05-041895-09-22
18961896-05-101896-08-15
18981898-06-041898-09-29
19001900-06-241900-09-11
19011901-06-141901-09-06
19021902-05-191902-07-13
19031903-07-041903-07-24
19041904-06-241904-07-18
19051905-06-151905-09-30
19061906-05-171906-09-19
19071907-06-161907-09-01
19081908-05-241908-09-27
19091909-06-211909-09-14
19101910-06-151910-08-22
19111911-05-191911-09-01
19121912-06-251912-09-09
19131913-06-141913-09-07
19141914-05-261914-08-31
19151915-04-241915-09-04
19161916-07-061916-09-06
19171917-07-211917-08-01
19191919-05-281919-09-08
19201920-05-311920-09-25
19211921-05-211921-08-06

Every Fixed Threshold

Fixed thresholds at Ivan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2444189536
35 C (95 F): Days15919219
40 C (104 F): Days1219162
90 F (32.2 C): Days2222189517
100 F (37.8 C): Days6319161
0 C (32 F): Ice days (max24104190458
0 C (32 F): Frost days (min232011917171
-10 C (14 F): Days with min2387190476
-20 C (-4 F): Days with min2340191224
-30 C (-22 F): Days with min9519041
20 C (68 F): Tropical nights (min201319132
10 mm (0.39 in): Days with 10 mm or more rain2636189827
25 mm (0.98 in): Days with 25 mm or more rain25918986
50 mm (1.97 in): Days with 50 mm or more rain6318961
10 cm (3.9 in): Days with 10 cm or more snowfall261218985
25 cm (9.8 in): Days with 25 cm or more snowfall8218951

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

  • Data for Ivan 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).