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Built 2026-10-19 (19 October 2026)

Lancaster Threshold Days by Year (USC00044747)

15 fixed thresholds counted per year at Lancaster (USC00044747): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lancaster Thresholds

  • Lancaster: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1917 with 152.
  • Lancaster: days with a maximum temperature at or above 35 C (95 F) in 28 years, most in 1960 with 107.
  • Lancaster: days with a maximum temperature at or above 90 F (32.2 C) in 28 years, most in 1960 with 131.
  • Lancaster: days with a maximum temperature at or above 100 F (37.8 C) in 28 years, most in 1917 with 59.
  • 15 fixed thresholds have at least one qualifying day at Lancaster.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Lancaster Days per year at Lancaster with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 152 in 1917. 0501001502001917: 1521945: 1241946: 1331947: 1391948: 1331949: 1421950: 1411951: 1371952: 1381953: 1171954: 1511955: 1201956: 1331957: 1151958: 1431959: 1291960: 1511961: 1311962: 1391963: 1111964: 1351965: 1281966: 1361967: 1221968: 1171969: 1301970: 1191971: 1181917194719501953195619591962196519681971
Days per year at Lancaster with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 152 in 1917.
Days at or above 30 C (86 F) per year at Lancaster
YearDaysDecade average
1917152152
1945124134.2
1946133134.2
1947139134.2
1948133134.2
1949142134.2
1950141132.4
1951137132.4
1952138132.4
1953117132.4
1954151132.4
1955120132.4
1956133132.4
1957115132.4
1958143132.4
1959129132.4
1960151130
1961131130
1962139130
1963111130
1964135130
1965128130
1966136130
1967122130
1968117130
1969130130
1970119118.5
1971118118.5
First to last qualifying date each year at Lancaster For each year, a bar from the first to the last day at Lancaster meeting 30 C (86 F). 1917: 5 April 1917 to 24 October 19171945: 17 April 1945 to 19 October 19451946: 16 April 1946 to 25 October 19461947: 6 March 1947 to 26 October 19471948: 15 April 1948 to 23 October 19481949: 11 April 1949 to 2 November 19491950: 16 April 1950 to 9 November 19501951: 8 April 1951 to 14 October 19511952: 18 April 1952 to 29 October 19521953: 4 April 1953 to 29 October 19531954: 12 April 1954 to 21 October 19541955: 10 May 1955 to 10 November 19551956: 24 March 1956 to 22 October 19561957: 4 May 1957 to 30 September 19571958: 19 April 1958 to 18 October 19581959: 2 April 1959 to 25 October 19591960: 3 April 1960 to 1 November 19601961: 2 April 1961 to 18 October 19611962: 12 April 1962 to 30 October 19621963: 5 May 1963 to 9 October 19631964: 14 April 1964 to 22 October 19641965: 19 April 1965 to 29 October 19651966: 30 March 1966 to 1 November 19661967: 15 May 1967 to 19 October 19671968: 30 April 1968 to 28 October 19681969: 29 March 1969 to 1 October 19691970: 15 May 1970 to 12 October 19701971: 12 April 1971 to 14 October 19711917194819521956196019641968JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Lancaster meeting 30 C (86 F).
First to last qualifying date each year at Lancaster
YearFirst dateLast date
19171917-04-051917-10-24
19451945-04-171945-10-19
19461946-04-161946-10-25
19471947-03-061947-10-26
19481948-04-151948-10-23
19491949-04-111949-11-02
19501950-04-161950-11-09
19511951-04-081951-10-14
19521952-04-181952-10-29
19531953-04-041953-10-29
19541954-04-121954-10-21
19551955-05-101955-11-10
19561956-03-241956-10-22
19571957-05-041957-09-30
19581958-04-191958-10-18
19591959-04-021959-10-25
19601960-04-031960-11-01
19611961-04-021961-10-18
19621962-04-121962-10-30
19631963-05-051963-10-09
19641964-04-141964-10-22
19651965-04-191965-10-29
19661966-03-301966-11-01
19671967-05-151967-10-19
19681968-04-301968-10-28
19691969-03-291969-10-01
19701970-05-151970-10-12
19711971-04-121971-10-14

Every Fixed Threshold

Fixed thresholds at Lancaster
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days281521917118
35 C (95 F): Days28107196077
40 C (104 F): Days2729196110
45 C (113 F): Days3219601
90 F (32.2 C): Days281311960103
100 F (37.8 C): Days2859191749
110 F (43.3 C): Days13619504
0 C (32 F): Ice days (max3219491
0 C (32 F): Frost days (min28114194896
-10 C (14 F): Days with min201019481
20 C (68 F): Tropical nights (min2834196120
25 C (77 F): Days with min9619611
10 mm (0.39 in): Days with 10 mm or more rain261019522
25 mm (0.98 in): Days with 25 mm or more rain14219461
10 cm (3.9 in): Days with 10 cm or more snowfall3219491

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

Download the Data

  • Data for Lancaster 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).