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

Letchworth Park Threshold Days by Year (USC00304698)

16 fixed thresholds counted per year at Letchworth Park (USC00304698): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Letchworth Park Thresholds

  • Letchworth Park: nights with a minimum temperature at or below 0 C (32 F) in 35 years, most in 1925 with 185.
  • Letchworth Park: nights with a minimum temperature at or below -10 C (14 F) in 35 years, most in 1917 with 63.
  • Letchworth Park: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 1949 with 52.
  • Letchworth Park: days with a maximum temperature at or below 0 C (32 F) in 34 years, most in 1916 with 69.
  • 16 fixed thresholds have at least one qualifying day at Letchworth Park.
34 years with a qualifying day
Days at or above 30 C (86 F) per year at Letchworth Park Days per year at Letchworth Park with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 52 in 1949. 02040601913: 301914: 271915: 81916: 281917: 51918: 281919: 331920: 91921: 381922: 151923: 71924: 71925: 291926: 11927: 121930: 221931: 181932: 271933: 371934: 471935: 191936: 281938: 101939: 131940: 61941: 221944: 231945: 221946: 151947: 211948: 181949: 521950: 151951: 20191319171921192519311935194019461950
Days per year at Letchworth Park with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 52 in 1949.
Days at or above 30 C (86 F) per year at Letchworth Park
YearDaysDecade average
19133022.7
19142722.7
1915822.7
19162822.7
1917522.7
19182822.7
19193322.7
1920914.8
19213814.8
19221514.8
1923714.8
1924714.8
19252914.8
1926114.8
19271214.8
19302224.6
19311824.6
19322724.6
19333724.6
19344724.6
19351924.6
19362824.6
19381024.6
19391324.6
1940622.4
19412222.4
19442322.4
19452222.4
19461522.4
19472122.4
19481822.4
19495222.4
19501517.5
19512017.5
First to last qualifying date each year at Letchworth Park For each year, a bar from the first to the last day at Letchworth Park meeting 30 C (86 F). 1913: 4 May 1913 to 7 September 19131914: 29 May 1914 to 22 September 19141915: 25 April 1915 to 16 September 19151916: 7 July 1916 to 7 September 19161917: 13 June 1917 to 2 August 19171918: 5 May 1918 to 25 August 19181919: 31 May 1919 to 4 October 19191920: 1 June 1920 to 15 August 19201921: 25 April 1921 to 10 September 19211922: 24 May 1922 to 9 September 19221923: 24 June 1923 to 11 August 19231924: 20 June 1924 to 31 August 19241925: 5 June 1925 to 20 September 19251926: 21 July 1926 to 21 July 19261927: 30 June 1927 to 2 October 19271930: 7 May 1930 to 11 September 19301931: 19 June 1931 to 22 September 19311932: 25 May 1932 to 20 September 19321933: 7 June 1933 to 24 September 19331934: 2 May 1934 to 20 August 19341935: 5 July 1935 to 21 August 19351936: 9 May 1936 to 16 September 19361938: 21 June 1938 to 17 August 19381939: 27 May 1939 to 16 September 19391940: 7 June 1940 to 29 July 19401941: 23 June 1941 to 16 September 19411944: 3 May 1944 to 17 August 19441945: 22 May 1945 to 8 September 19451946: 24 June 1946 to 8 August 19461947: 10 June 1947 to 11 September 19471948: 23 June 1948 to 28 August 19481949: 4 May 1949 to 10 October 19491950: 5 May 1950 to 28 August 19501951: 24 June 1951 to 5 October 19511913191819231930193519411948JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Letchworth Park meeting 30 C (86 F).
First to last qualifying date each year at Letchworth Park
YearFirst dateLast date
19131913-05-041913-09-07
19141914-05-291914-09-22
19151915-04-251915-09-16
19161916-07-071916-09-07
19171917-06-131917-08-02
19181918-05-051918-08-25
19191919-05-311919-10-04
19201920-06-011920-08-15
19211921-04-251921-09-10
19221922-05-241922-09-09
19231923-06-241923-08-11
19241924-06-201924-08-31
19251925-06-051925-09-20
19261926-07-211926-07-21
19271927-06-301927-10-02
19301930-05-071930-09-11
19311931-06-191931-09-22
19321932-05-251932-09-20
19331933-06-071933-09-24
19341934-05-021934-08-20
19351935-07-051935-08-21
19361936-05-091936-09-16
19381938-06-211938-08-17
19391939-05-271939-09-16
19401940-06-071940-07-29
19411941-06-231941-09-16
19441944-05-031944-08-17
19451945-05-221945-09-08
19461946-06-241946-08-08
19471947-06-101947-09-11
19481948-06-231948-08-28
19491949-05-041949-10-10
19501950-05-051950-08-28
19511951-06-241951-10-05

Every Fixed Threshold

Fixed thresholds at Letchworth Park
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3452194920
35 C (95 F): Days12819331
90 F (32.2 C): Days292819341
100 F (37.8 C): Days3319363
0 C (32 F): Ice days (max3469191642
0 C (32 F): Frost days (min351851925146
-10 C (14 F): Days with min3563191736
-20 C (-4 F): Days with min311519181
-30 C (-22 F): Days with min2119141
20 C (68 F): Tropical nights (min311319362
10 mm (0.39 in): Days with 10 mm or more rain3234191323
25 mm (0.98 in): Days with 25 mm or more rain32919502
50 mm (1.97 in): Days with 50 mm or more rain15219132
10 cm (3.9 in): Days with 10 cm or more snowfall7719261
25 cm (9.8 in): Days with 25 cm or more snowfall3219482
50 cm (19.7 in): Days with 50 cm or more snowfall1119251

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1913.

Download the Data

  • Data for Letchworth Park 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).