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Built 2026-10-19 (19 October 2026)

Joliet Threshold Days by Year (USW00014834)

15 fixed thresholds counted per year at Joliet (USW00014834): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Joliet Thresholds

  • Joliet: days with 10 mm (0.39 in) or more of precipitation in 75 years, most in 1902 with 43.
  • Joliet: days with 25 mm (0.98 in) or more of precipitation in 75 years, most in 1902 with 20.
  • Joliet: days with 50 mm (1.97 in) or more of precipitation in 54 years, most in 1941 with 4.
  • Joliet: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 1895 with 99.
  • 15 fixed thresholds have at least one qualifying day at Joliet.
36 years with a qualifying day
Days at or above 30 C (86 F) per year at Joliet Days per year at Joliet with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 1895. 02550751001894: 621895: 991896: 791897: 871898: 441899: 591900: 521946: 491947: 571948: 531949: 621950: 311951: 291952: 561954: 581955: 671956: 571957: 421958: 311959: 721960: 481961: 491962: 521963: 581964: 651965: 461966: 541967: 341968: 541969: 481970: 641971: 761972: 521974: 542025: 572026: 9189418981947195119561960196419681972
Days per year at Joliet with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 1895.
Days at or above 30 C (86 F) per year at Joliet
YearDaysDecade average
18946271.7
18959971.7
18967971.7
18978771.7
18984471.7
18995971.7
19005252
19464955.3
19475755.3
19485355.3
19496255.3
19503149.2
19512949.2
19525649.2
19545849.2
19556749.2
19565749.2
19574249.2
19583149.2
19597249.2
19604850.8
19614950.8
19625250.8
19635850.8
19646550.8
19654650.8
19665450.8
19673450.8
19685450.8
19694850.8
19706461.5
19717661.5
19725261.5
19745461.5
20255733
2026933
First to last qualifying date each year at Joliet For each year, a bar from the first to the last day at Joliet meeting 30 C (86 F). 1894: 28 April 1894 to 7 September 18941895: 30 April 1895 to 25 September 18951896: 16 April 1896 to 13 September 18961897: 6 May 1897 to 15 October 18971898: 3 June 1898 to 29 September 18981899: 29 April 1899 to 16 September 18991900: 12 May 1900 to 5 October 19001946: 6 June 1946 to 26 September 19461947: 15 May 1947 to 15 October 19471948: 28 May 1948 to 19 September 19481949: 3 May 1949 to 9 October 19491950: 24 May 1950 to 17 October 19501951: 1 May 1951 to 4 October 19511952: 4 May 1952 to 1 October 19521954: 26 April 1954 to 3 October 19541955: 3 May 1955 to 19 September 19551956: 11 May 1956 to 2 October 19561957: 1 May 1957 to 19 September 19571958: 17 May 1958 to 24 September 19581959: 2 May 1959 to 23 September 19591960: 23 April 1960 to 24 September 19601961: 14 May 1961 to 22 September 19611962: 26 April 1962 to 15 October 19621963: 8 May 1963 to 16 October 19631964: 5 May 1964 to 21 September 19641965: 1 May 1965 to 19 September 19651966: 23 May 1966 to 13 September 19661967: 25 May 1967 to 5 October 19671968: 2 May 1968 to 16 October 19681969: 2 May 1969 to 4 October 19691970: 29 April 1970 to 22 September 19701971: 17 May 1971 to 3 October 19711972: 18 May 1972 to 31 August 19721974: 21 May 1974 to 19 September 19742025: 15 May 2025 to 6 October 20252026: 17 May 2026 to 12 October 202618941899194919551960196519702026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Joliet meeting 30 C (86 F).
First to last qualifying date each year at Joliet
YearFirst dateLast date
18941894-04-281894-09-07
18951895-04-301895-09-25
18961896-04-161896-09-13
18971897-05-061897-10-15
18981898-06-031898-09-29
18991899-04-291899-09-16
19001900-05-121900-10-05
19461946-06-061946-09-26
19471947-05-151947-10-15
19481948-05-281948-09-19
19491949-05-031949-10-09
19501950-05-241950-10-17
19511951-05-011951-10-04
19521952-05-041952-10-01
19541954-04-261954-10-03
19551955-05-031955-09-19
19561956-05-111956-10-02
19571957-05-011957-09-19
19581958-05-171958-09-24
19591959-05-021959-09-23
19601960-04-231960-09-24
19611961-05-141961-09-22
19621962-04-261962-10-15
19631963-05-081963-10-16
19641964-05-051964-09-21
19651965-05-011965-09-19
19661966-05-231966-09-13
19671967-05-251967-10-05
19681968-05-021968-10-16
19691969-05-021969-10-04
19701970-04-291970-09-22
19711971-05-171971-10-03
19721972-05-181972-08-31
19741974-05-211974-09-19
20252025-05-152025-10-06
20262026-05-172026-10-12

Every Fixed Threshold

Fixed thresholds at Joliet
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days369918959
35 C (95 F): Days303018971
90 F (32.2 C): Days367318954
100 F (37.8 C): Days8718971
0 C (32 F): Ice days (max3663196323
0 C (32 F): Frost days (min36160195262
-10 C (14 F): Days with min3660195015
-20 C (-4 F): Days with min342519632
20 C (68 F): Tropical nights (min364220259
25 C (77 F): Days with min11219652
10 mm (0.39 in): Days with 10 mm or more rain754319027
25 mm (0.98 in): Days with 25 mm or more rain752019021
50 mm (1.97 in): Days with 50 mm or more rain54419412
100 mm (3.94 in): Days with 100 mm or more rain4119111
10 cm (3.9 in): Days with 10 cm or more snowfall14419702

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

  • Data for Joliet 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 (2026-10-17).