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Built 2026-10-19 (19 October 2026)

Vernonia Threshold Days by Year (USC00358879)

16 fixed thresholds counted per year at Vernonia (USC00358879): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Vernonia Thresholds

  • Vernonia: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 1899 with 67.
  • Vernonia: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 1954 with 16.
  • Vernonia: nights with a minimum temperature at or below 0 C (32 F) in 27 years, most in 1948 with 146.
  • Vernonia: days with a maximum temperature at or above 30 C (86 F) in 25 years, most in 1897 with 45.
  • 16 fixed thresholds have at least one qualifying day at Vernonia.
25 years with a qualifying day
Days at or above 30 C (86 F) per year at Vernonia Days per year at Vernonia with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 45 in 1897. 02040601897: 451899: 351939: 311940: 121941: 131942: 151944: 151945: 181946: 121947: 91948: 131949: 141951: 181952: 271953: 121956: 161957: 71958: 291959: 131960: 191961: 251962: 121963: 91964: 51966: 7189719401944194719511956195919621966
Days per year at Vernonia with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 45 in 1897.
Days at or above 30 C (86 F) per year at Vernonia
YearDaysDecade average
18974540
18993540
19393131
19401213.4
19411313.4
19421513.4
19441513.4
19451813.4
19461213.4
1947913.4
19481313.4
19491413.4
19511817.4
19522717.4
19531217.4
19561617.4
1957717.4
19582917.4
19591317.4
19601912.8
19612512.8
19621212.8
1963912.8
1964512.8
1966712.8
First to last qualifying date each year at Vernonia For each year, a bar from the first to the last day at Vernonia meeting 30 C (86 F). 1897: 8 April 1897 to 6 October 18971899: 7 April 1899 to 4 October 18991939: 8 May 1939 to 22 September 19391940: 10 June 1940 to 29 August 19401941: 23 May 1941 to 19 August 19411942: 29 June 1942 to 24 September 19421944: 9 June 1944 to 10 September 19441945: 2 May 1945 to 12 September 19451946: 19 June 1946 to 22 August 19461947: 23 May 1947 to 24 September 19471948: 2 June 1948 to 12 September 19481949: 12 May 1949 to 26 September 19491951: 27 June 1951 to 17 September 19511952: 7 July 1952 to 6 October 19521953: 6 July 1953 to 10 September 19531956: 16 May 1956 to 6 September 19561957: 29 April 1957 to 23 September 19571958: 17 May 1958 to 8 September 19581959: 9 July 1959 to 2 September 19591960: 5 July 1960 to 11 September 19601961: 1 June 1961 to 22 August 19611962: 21 July 1962 to 17 September 19621963: 19 May 1963 to 27 September 19631964: 11 July 1964 to 23 August 19641966: 16 June 1966 to 21 September 19661897194119461951195719611966JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Vernonia meeting 30 C (86 F).
First to last qualifying date each year at Vernonia
YearFirst dateLast date
18971897-04-081897-10-06
18991899-04-071899-10-04
19391939-05-081939-09-22
19401940-06-101940-08-29
19411941-05-231941-08-19
19421942-06-291942-09-24
19441944-06-091944-09-10
19451945-05-021945-09-12
19461946-06-191946-08-22
19471947-05-231947-09-24
19481948-06-021948-09-12
19491949-05-121949-09-26
19511951-06-271951-09-17
19521952-07-071952-10-06
19531953-07-061953-09-10
19561956-05-161956-09-06
19571957-04-291957-09-23
19581958-05-171958-09-08
19591959-07-091959-09-02
19601960-07-051960-09-11
19611961-06-011961-08-22
19621962-07-211962-09-17
19631963-05-191963-09-27
19641964-07-111964-08-23
19661966-06-161966-09-21

Every Fixed Threshold

Fixed thresholds at Vernonia
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days254518977
35 C (95 F): Days151718977
40 C (104 F): Days3218971
90 F (32.2 C): Days252918972
100 F (37.8 C): Days11718971
0 C (32 F): Ice days (max17619561
0 C (32 F): Frost days (min271461948101
-10 C (14 F): Days with min191619493
-20 C (-4 F): Days with min1119491
20 C (68 F): Tropical nights (min1119411
10 mm (0.39 in): Days with 10 mm or more rain3167189939
25 mm (0.98 in): Days with 25 mm or more rain3116195411
50 mm (1.97 in): Days with 50 mm or more rain11319543
100 mm (3.94 in): Days with 100 mm or more rain10n/a1
10 cm (3.9 in): Days with 10 cm or more snowfall191119497
25 cm (9.8 in): Days with 25 cm or more snowfall8519541

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.

Download the Data

  • Data for Vernonia 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).