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Built 2026-10-19 (19 October 2026)

Clark 4 SW Threshold Days by Year (USC00481770)

18 fixed thresholds counted per year at Clark 4 SW (USC00481770): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clark 4 SW Thresholds

  • Clark 4 SW: days with a maximum temperature at or above 30 C (86 F) in 35 years, most in 1936 with 49.
  • Clark 4 SW: days with a maximum temperature at or above 90 F (32.2 C) in 35 years, most in 1919 with 31.
  • Clark 4 SW: days with a maximum temperature at or below 0 C (32 F) in 35 years, most in 1916 with 56.
  • Clark 4 SW: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1951 with 170.
  • 18 fixed thresholds have at least one qualifying day at Clark 4 SW.
35 years with a qualifying day
Days at or above 30 C (86 F) per year at Clark 4 SW Days per year at Clark 4 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 49 in 1936. 02040601907: 121908: 291909: 381910: 391911: 251912: 201913: 281914: 381915: 51916: 81917: 321918: 241919: 481920: 301921: 431922: 391923: 261924: 201925: 281926: 281927: 71935: 321936: 491937: 411939: 321940: 451941: 341948: 431949: 361950: 181951: 211952: 371955: 471956: 481957: 35190719111915191919231927193919491955
Days per year at Clark 4 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 49 in 1936.
Days at or above 30 C (86 F) per year at Clark 4 SW
YearDaysDecade average
19071226.3
19082926.3
19093826.3
19103926.7
19112526.7
19122026.7
19132826.7
19143826.7
1915526.7
1916826.7
19173226.7
19182426.7
19194826.7
19203027.6
19214327.6
19223927.6
19232627.6
19242027.6
19252827.6
19262827.6
1927727.6
19353238.5
19364938.5
19374138.5
19393238.5
19404539.5
19413439.5
19484339.5
19493639.5
19501834.3
19512134.3
19523734.3
19554734.3
19564834.3
19573534.3
First to last qualifying date each year at Clark 4 SW For each year, a bar from the first to the last day at Clark 4 SW meeting 30 C (86 F). 1907: 29 June 1907 to 22 August 19071908: 25 June 1908 to 7 September 19081909: 18 June 1909 to 29 August 19091910: 11 June 1910 to 17 September 19101911: 5 May 1911 to 1 September 19111912: 20 June 1912 to 25 August 19121913: 21 June 1913 to 13 September 19131914: 1 June 1914 to 18 September 19141915: 22 July 1915 to 31 August 19151916: 17 June 1916 to 2 September 19161917: 15 May 1917 to 21 August 19171918: 4 May 1918 to 15 August 19181919: 25 May 1919 to 31 August 19191920: 7 June 1920 to 18 September 19201921: 11 June 1921 to 1 September 19211922: 24 May 1922 to 27 September 19221923: 26 May 1923 to 3 September 19231924: 2 July 1924 to 29 August 19241925: 20 May 1925 to 3 September 19251926: 5 June 1926 to 30 August 19261927: 16 May 1927 to 18 July 19271935: 22 June 1935 to 14 September 19351936: 14 May 1936 to 22 September 19361937: 28 May 1937 to 20 September 19371939: 29 May 1939 to 4 September 19391940: 31 May 1940 to 4 September 19401941: 12 May 1941 to 19 September 19411948: 17 May 1948 to 15 September 19481949: 10 June 1949 to 25 August 19491950: 30 June 1950 to 4 September 19501951: 4 July 1951 to 17 August 19511952: 5 June 1952 to 27 September 19521955: 21 June 1955 to 14 September 19551956: 23 May 1956 to 19 September 19561957: 1 July 1957 to 28 September 19571907191219171922192719401951JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Clark 4 SW meeting 30 C (86 F).
First to last qualifying date each year at Clark 4 SW
YearFirst dateLast date
19071907-06-291907-08-22
19081908-06-251908-09-07
19091909-06-181909-08-29
19101910-06-111910-09-17
19111911-05-051911-09-01
19121912-06-201912-08-25
19131913-06-211913-09-13
19141914-06-011914-09-18
19151915-07-221915-08-31
19161916-06-171916-09-02
19171917-05-151917-08-21
19181918-05-041918-08-15
19191919-05-251919-08-31
19201920-06-071920-09-18
19211921-06-111921-09-01
19221922-05-241922-09-27
19231923-05-261923-09-03
19241924-07-021924-08-29
19251925-05-201925-09-03
19261926-06-051926-08-30
19271927-05-161927-07-18
19351935-06-221935-09-14
19361936-05-141936-09-22
19371937-05-281937-09-20
19391939-05-291939-09-04
19401940-05-311940-09-04
19411941-05-121941-09-19
19481948-05-171948-09-15
19491949-06-101949-08-25
19501950-06-301950-09-04
19511951-07-041951-08-17
19521952-06-051952-09-27
19551955-06-211955-09-14
19561956-05-231956-09-19
19571957-07-011957-09-28

Every Fixed Threshold

Fixed thresholds at Clark 4 SW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3549193635
35 C (95 F): Days311319553
40 C (104 F): Days1119261
90 F (32.2 C): Days3531191918
100 F (37.8 C): Days13419261
0 C (32 F): Ice days (max3556191632
0 C (32 F): Frost days (min341701951155
-10 C (14 F): Days with min3472195545
-20 C (-4 F): Days with min3429191617
-30 C (-22 F): Days with min19819242
-40 C (-40 F): Days with min1119351
20 C (68 F): Tropical nights (min251719361
25 C (77 F): Days with min1219362
10 mm (0.39 in): Days with 10 mm or more rain331019156
25 mm (0.98 in): Days with 25 mm or more rain11419151
10 cm (3.9 in): Days with 10 cm or more snowfall11719502
25 cm (9.8 in): Days with 25 cm or more snowfall4119191
50 cm (19.7 in): Days with 50 cm or more snowfall1119561

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

  • Data for Clark 4 SW 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).