Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

Blackwell 1 W Threshold Days by Year (USC00340814)

19 fixed thresholds counted per year at Blackwell 1 W (USC00340814): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blackwell 1 W Thresholds

  • Blackwell 1 W: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1923 with 37.
  • Blackwell 1 W: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1951 with 17.
  • Blackwell 1 W: nights with a minimum temperature at or below 0 C (32 F) in 51 years, most in 1942 with 113.
  • Blackwell 1 W: nights with a minimum temperature at or above 20 C (68 F) in 51 years, most in 1954 with 100.
  • 19 fixed thresholds have at least one qualifying day at Blackwell 1 W.
50 years with a qualifying day
Days at or above 30 C (86 F) per year at Blackwell 1 W Days per year at Blackwell 1 W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 161 in 1956. 0501001502001918: 1091919: 1071920: 1011921: 1301922: 1061923: 931924: 1041925: 1191926: 1071927: 1041928: 1131929: 1001930: 1151931: 1261938: 1371939: 1311940: 1191941: 721942: 941943: 971944: 941945: 1011946: 1131947: 1401948: 1241949: 1121951: 991952: 1331953: 1361954: 1411955: 1191956: 1611957: 971958: 1261959: 1301960: 1121961: 931962: 1321963: 1481964: 1071965: 1211966: 1211967: 1061968: 1121969: 1051970: 1301971: 1251972: 1291973: 1161974: 971918192319281939194419491955196019651970
Days per year at Blackwell 1 W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 161 in 1956.
Days at or above 30 C (86 F) per year at Blackwell 1 W
YearDaysDecade average
1918109108
1919107108
1920101107.7
1921130107.7
1922106107.7
192393107.7
1924104107.7
1925119107.7
1926107107.7
1927104107.7
1928113107.7
1929100107.7
1930115127.3
1931126127.3
1938137127.3
1939131127.3
1940119106.6
194172106.6
194294106.6
194397106.6
194494106.6
1945101106.6
1946113106.6
1947140106.6
1948124106.6
1949112106.6
195199126.9
1952133126.9
1953136126.9
1954141126.9
1955119126.9
1956161126.9
195797126.9
1958126126.9
1959130126.9
1960112115.7
196193115.7
1962132115.7
1963148115.7
1964107115.7
1965121115.7
1966121115.7
1967106115.7
1968112115.7
1969105115.7
1970130119.4
1971125119.4
1972129119.4
1973116119.4
197497119.4
First to last qualifying date each year at Blackwell 1 W For each year, a bar from the first to the last day at Blackwell 1 W meeting 30 C (86 F). 1918: 26 March 1918 to 8 October 19181919: 6 June 1919 to 3 October 19191920: 15 April 1920 to 12 October 19201921: 18 March 1921 to 24 October 19211922: 10 June 1922 to 29 October 19221923: 31 May 1923 to 29 September 19231924: 8 April 1924 to 30 October 19241925: 18 April 1925 to 4 October 19251926: 9 May 1926 to 24 September 19261927: 11 April 1927 to 28 October 19271928: 1 April 1928 to 15 October 19281929: 24 March 1929 to 17 October 19291930: 6 April 1930 to 10 October 19301931: 16 May 1931 to 11 October 19311938: 29 April 1938 to 1 November 19381939: 26 April 1939 to 27 October 19391940: 1 April 1940 to 26 October 19401941: 14 May 1941 to 13 October 19411942: 4 April 1942 to 18 September 19421943: 3 April 1943 to 22 September 19431944: 15 May 1944 to 26 September 19441945: 13 May 1945 to 6 November 19451946: 30 March 1946 to 29 October 19461947: 29 April 1947 to 23 October 19471948: 6 April 1948 to 14 October 19481949: 23 April 1949 to 9 October 19491951: 27 April 1951 to 5 October 19511952: 3 May 1952 to 27 October 19521953: 22 April 1953 to 13 October 19531954: 4 April 1954 to 14 October 19541955: 10 March 1955 to 21 October 19551956: 24 February 1956 to 17 October 19561957: 29 May 1957 to 6 October 19571958: 23 April 1958 to 20 October 19581959: 24 March 1959 to 23 September 19591960: 25 April 1960 to 11 October 19601961: 19 April 1961 to 29 September 19611962: 12 February 1962 to 15 October 19621963: 28 March 1963 to 18 October 19631964: 12 April 1964 to 20 September 19641965: 20 April 1965 to 11 October 19651966: 31 March 1966 to 14 October 19661967: 10 March 1967 to 14 October 19671968: 30 April 1968 to 30 October 19681969: 21 May 1969 to 4 October 19691970: 27 April 1970 to 5 October 19701971: 12 April 1971 to 13 October 19711972: 6 April 1972 to 12 October 19721973: 10 May 1973 to 24 October 19731974: 31 March 1974 to 12 September 197419181925193819451953196019671974JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Blackwell 1 W meeting 30 C (86 F).
First to last qualifying date each year at Blackwell 1 W
YearFirst dateLast date
19181918-03-261918-10-08
19191919-06-061919-10-03
19201920-04-151920-10-12
19211921-03-181921-10-24
19221922-06-101922-10-29
19231923-05-311923-09-29
19241924-04-081924-10-30
19251925-04-181925-10-04
19261926-05-091926-09-24
19271927-04-111927-10-28
19281928-04-011928-10-15
19291929-03-241929-10-17
19301930-04-061930-10-10
19311931-05-161931-10-11
19381938-04-291938-11-01
19391939-04-261939-10-27
19401940-04-011940-10-26
19411941-05-141941-10-13
19421942-04-041942-09-18
19431943-04-031943-09-22
19441944-05-151944-09-26
19451945-05-131945-11-06
19461946-03-301946-10-29
19471947-04-291947-10-23
19481948-04-061948-10-14
19491949-04-231949-10-09
19511951-04-271951-10-05
19521952-05-031952-10-27
19531953-04-221953-10-13
19541954-04-041954-10-14
19551955-03-101955-10-21
19561956-02-241956-10-17
19571957-05-291957-10-06
19581958-04-231958-10-20
19591959-03-241959-09-23
19601960-04-251960-10-11
19611961-04-191961-09-29
19621962-02-121962-10-15
19631963-03-281963-10-18
19641964-04-121964-09-20
19651965-04-201965-10-11
19661966-03-311966-10-14
19671967-03-101967-10-14
19681968-04-301968-10-30
19691969-05-211969-10-04
19701970-04-271970-10-05
19711971-04-121971-10-13
19721972-04-061972-10-12
19731973-05-101973-10-24
19741974-03-311974-09-12

Every Fixed Threshold

Fixed thresholds at Blackwell 1 W
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days50161195697
35 C (95 F): Days50122195650
40 C (104 F): Days425419565
45 C (113 F): Days3319541
90 F (32.2 C): Days50146195678
100 F (37.8 C): Days4986195630
110 F (43.3 C): Days71019562
0 C (32 F): Ice days (max5027191811
0 C (32 F): Frost days (min51113194265
-10 C (14 F): Days with min5029191811
-20 C (-4 F): Days with min15619301
20 C (68 F): Tropical nights (min51100195458
25 C (77 F): Days with min472819541
10 mm (0.39 in): Days with 10 mm or more rain5437192329
25 mm (0.98 in): Days with 25 mm or more rain5417195115
50 mm (1.97 in): Days with 50 mm or more rain47719613
100 mm (3.94 in): Days with 100 mm or more rain10219591
10 cm (3.9 in): Days with 10 cm or more snowfall17319492
25 cm (9.8 in): Days with 25 cm or more snowfall1119701

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1918.

Download the Data

  • Data for Blackwell 1 W 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).