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

Wapello Threshold Days by Year (USC00138668)

19 fixed thresholds counted per year at Wapello (USC00138668): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wapello Thresholds

  • Wapello: days with 10 mm (0.39 in) or more of precipitation in 77 years, most in 1993 with 45.
  • Wapello: days with 25 mm (0.98 in) or more of precipitation in 77 years, most in 2009 with 17.
  • Wapello: days with 50 mm (1.97 in) or more of precipitation in 64 years, most in 1973 with 7.
  • Wapello: days with 10 cm (3.9 in) or more of snowfall in 51 years, most in 2000 with 8.
  • 19 fixed thresholds have at least one qualifying day at Wapello.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Wapello Days per year at Wapello with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1901. 0204060801899: 561900: 751901: 771903: 211904: 171905: 181906: 281909: 241910: 201911: 411912: 36189919011904190619101912
Days per year at Wapello with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1901.
Days at or above 30 C (86 F) per year at Wapello
YearDaysDecade average
18995656
19007537.1
19017737.1
19032137.1
19041737.1
19051837.1
19062837.1
19092437.1
19102032.3
19114132.3
19123632.3
First to last qualifying date each year at Wapello For each year, a bar from the first to the last day at Wapello meeting 30 C (86 F). 1899: 12 May 1899 to 13 October 18991900: 11 May 1900 to 14 September 19001901: 29 April 1901 to 24 September 19011903: 30 June 1903 to 24 August 19031904: 23 June 1904 to 17 September 19041905: 4 June 1905 to 31 August 19051906: 15 May 1906 to 23 September 19061909: 5 May 1909 to 20 September 19091910: 29 April 1910 to 24 August 19101911: 10 May 1911 to 13 September 19111912: 22 May 1912 to 6 October 1912189919011904190619101912JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wapello meeting 30 C (86 F).
First to last qualifying date each year at Wapello
YearFirst dateLast date
18991899-05-121899-10-13
19001900-05-111900-09-14
19011901-04-291901-09-24
19031903-06-301903-08-24
19041904-06-231904-09-17
19051905-06-041905-08-31
19061906-05-151906-09-23
19091909-05-051909-09-20
19101910-04-291910-08-24
19111911-05-101911-09-13
19121912-05-221912-10-06

Every Fixed Threshold

Fixed thresholds at Wapello
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1177190136
35 C (95 F): Days63319014
40 C (104 F): Days111190111
90 F (32.2 C): Days1158190117
100 F (37.8 C): Days41619012
110 F (43.3 C): Days1119011
0 C (32 F): Ice days (max1160191260
0 C (32 F): Frost days (min101391901128
-10 C (14 F): Days with min1055191255
-20 C (-4 F): Days with min911189911
-30 C (-22 F): Days with min1118991
20 C (68 F): Tropical nights (min1044190037
25 C (77 F): Days with min5919012
10 mm (0.39 in): Days with 10 mm or more rain7745199326
25 mm (0.98 in): Days with 25 mm or more rain771720099
50 mm (1.97 in): Days with 50 mm or more rain64719732
100 mm (3.94 in): Days with 100 mm or more rain7119031
10 cm (3.9 in): Days with 10 cm or more snowfall51820006
25 cm (9.8 in): Days with 25 cm or more snowfall8119481

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

  • Data for Wapello 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).