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Built 2026-10-19 (19 October 2026)

Saint Charles Threshold Days by Year (USC00207253)

17 fixed thresholds counted per year at Saint Charles (USC00207253): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Saint Charles Thresholds

  • Saint Charles: days with 10 mm (0.39 in) or more of precipitation in 49 years, most in 1991 with 38.
  • Saint Charles: days with 25 mm (0.98 in) or more of precipitation in 49 years, most in 1945 with 9.
  • Saint Charles: days with 10 cm (3.9 in) or more of snowfall in 41 years, most in 1975 with 7.
  • Saint Charles: nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 1996 with 175.
  • 17 fixed thresholds have at least one qualifying day at Saint Charles.
35 years with a qualifying day
Days at or above 30 C (86 F) per year at Saint Charles Days per year at Saint Charles with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1955. 02040601953: 481954: 381955: 601956: 221957: 281958: 241959: 551960: 321961: 341962: 401963: 451964: 481965: 341966: 481967: 241968: 371969: 311970: 391971: 561972: 331973: 401974: 291975: 511976: 451977: 471978: 511979: 271980: 321989: 181991: 351992: 51993: 161994: 131995: 311996: 9195319571961196519691973197719891994
Days per year at Saint Charles with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1955.
Days at or above 30 C (86 F) per year at Saint Charles
YearDaysDecade average
19534839.3
19543839.3
19556039.3
19562239.3
19572839.3
19582439.3
19595539.3
19603237.3
19613437.3
19624037.3
19634537.3
19644837.3
19653437.3
19664837.3
19672437.3
19683737.3
19693137.3
19703941.8
19715641.8
19723341.8
19734041.8
19742941.8
19755141.8
19764541.8
19774741.8
19785141.8
19792741.8
19803225
19891825
19913518.2
1992518.2
19931618.2
19941318.2
19953118.2
1996918.2
First to last qualifying date each year at Saint Charles For each year, a bar from the first to the last day at Saint Charles meeting 30 C (86 F). 1953: 9 May 1953 to 3 October 19531954: 12 June 1954 to 6 September 19541955: 3 May 1955 to 19 September 19551956: 9 June 1956 to 31 August 19561957: 15 June 1957 to 14 August 19571958: 29 June 1958 to 31 August 19581959: 5 May 1959 to 9 September 19591960: 23 April 1960 to 9 September 19601961: 5 June 1961 to 22 September 19611962: 14 May 1962 to 13 September 19621963: 1 June 1963 to 6 October 19631964: 6 May 1964 to 10 September 19641965: 7 May 1965 to 21 September 19651966: 4 June 1966 to 2 September 19661967: 3 June 1967 to 4 October 19671968: 5 June 1968 to 23 September 19681969: 16 May 1969 to 27 August 19691970: 21 May 1970 to 21 September 19701971: 18 May 1971 to 2 October 19711972: 18 May 1972 to 1 September 19721973: 8 June 1973 to 26 September 19731974: 21 May 1974 to 11 September 19741975: 18 May 1975 to 13 October 19751976: 7 June 1976 to 14 September 19761977: 13 May 1977 to 1 September 19771978: 25 May 1978 to 20 September 19781979: 8 May 1979 to 12 September 19791980: 22 April 1980 to 7 September 19801989: 24 June 1989 to 5 August 19891991: 12 May 1991 to 15 September 19911992: 12 June 1992 to 25 August 19921993: 10 May 1993 to 30 August 19931994: 22 May 1994 to 15 September 19941995: 16 June 1995 to 5 September 19951996: 19 May 1996 to 7 August 19961953195819631968197319781992JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Saint Charles meeting 30 C (86 F).
First to last qualifying date each year at Saint Charles
YearFirst dateLast date
19531953-05-091953-10-03
19541954-06-121954-09-06
19551955-05-031955-09-19
19561956-06-091956-08-31
19571957-06-151957-08-14
19581958-06-291958-08-31
19591959-05-051959-09-09
19601960-04-231960-09-09
19611961-06-051961-09-22
19621962-05-141962-09-13
19631963-06-011963-10-06
19641964-05-061964-09-10
19651965-05-071965-09-21
19661966-06-041966-09-02
19671967-06-031967-10-04
19681968-06-051968-09-23
19691969-05-161969-08-27
19701970-05-211970-09-21
19711971-05-181971-10-02
19721972-05-181972-09-01
19731973-06-081973-09-26
19741974-05-211974-09-11
19751975-05-181975-10-13
19761976-06-071976-09-14
19771977-05-131977-09-01
19781978-05-251978-09-20
19791979-05-081979-09-12
19801980-04-221980-09-07
19891989-06-241989-08-05
19911991-05-121991-09-15
19921992-06-121992-08-25
19931993-05-101993-08-30
19941994-05-221994-09-15
19951995-06-161995-09-05
19961996-05-191996-08-07

Every Fixed Threshold

Fixed thresholds at Saint Charles
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days356019559
35 C (95 F): Days251319533
90 F (32.2 C): Days353619553
100 F (37.8 C): Days5319533
0 C (32 F): Ice days (max3575197852
0 C (32 F): Frost days (min391751996175
-10 C (14 F): Days with min3970198959
-20 C (-4 F): Days with min3723199623
-30 C (-22 F): Days with min3219942
20 C (68 F): Tropical nights (min382319593
25 C (77 F): Days with min4119661
10 mm (0.39 in): Days with 10 mm or more rain4938199128
25 mm (0.98 in): Days with 25 mm or more rain49919456
50 mm (1.97 in): Days with 50 mm or more rain26319492
100 mm (3.94 in): Days with 100 mm or more rain1119561
10 cm (3.9 in): Days with 10 cm or more snowfall41719751
25 cm (9.8 in): Days with 25 cm or more snowfall9219671

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1953.

Download the Data

  • Data for Saint Charles 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).