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Built 2026-10-19 (19 October 2026)

Phila 1 WSW Threshold Days by Year (USC00226894)

16 fixed thresholds counted per year at Phila 1 WSW (USC00226894): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Phila 1 WSW Thresholds

  • Phila 1 WSW: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 2009 with 61.
  • Phila 1 WSW: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1974 with 29.
  • Phila 1 WSW: days with 50 mm (1.97 in) or more of precipitation in 68 years, most in 1983 with 15.
  • Phila 1 WSW: days with a maximum temperature at or above 30 C (86 F) in 67 years, most in 2007 with 153.
  • 16 fixed thresholds have at least one qualifying day at Phila 1 WSW.
67 years with a qualifying day
Days at or above 30 C (86 F) per year at Phila 1 WSW Days per year at Phila 1 WSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 153 in 2007. 0501001502001950: 1071953: 1371954: 1341955: 1321957: 1111958: 1151959: 1301960: 1211961: 1081962: 1411963: 1351964: 1131965: 1251966: 941967: 831968: 1001969: 1041970: 1121971: 1091972: 1211973: 1201974: 1031975: 1011976: 861977: 1281978: 1201979: 861980: 1181981: 1031982: 951983: 811984: 1011986: 1101987: 1121988: 1141989: 841990: 1191991: 1121992: 1021993: 1251994: 1111995: 1291996: 1081997: 1061998: 1391999: 1222000: 1422001: 1162002: 1422003: 1082004: 1092005: 1362006: 1472007: 1532008: 1142009: 1282010: 1432011: 1242012: 1162013: 1092014: 1222015: 1272016: 1422017: 1082018: 1292021: 1012022: 1261950196019671974198119891996200320102017
Days per year at Phila 1 WSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 153 in 2007.
Days at or above 30 C (86 F) per year at Phila 1 WSW
YearDaysDecade average
1950107123.7
1953137123.7
1954134123.7
1955132123.7
1957111123.7
1958115123.7
1959130123.7
1960121112.4
1961108112.4
1962141112.4
1963135112.4
1964113112.4
1965125112.4
196694112.4
196783112.4
1968100112.4
1969104112.4
1970112108.6
1971109108.6
1972121108.6
1973120108.6
1974103108.6
1975101108.6
197686108.6
1977128108.6
1978120108.6
197986108.6
1980118102
1981103102
198295102
198381102
1984101102
1986110102
1987112102
1988114102
198984102
1990119117.3
1991112117.3
1992102117.3
1993125117.3
1994111117.3
1995129117.3
1996108117.3
1997106117.3
1998139117.3
1999122117.3
2000142129.5
2001116129.5
2002142129.5
2003108129.5
2004109129.5
2005136129.5
2006147129.5
2007153129.5
2008114129.5
2009128129.5
2010143124.4
2011124124.4
2012116124.4
2013109124.4
2014122124.4
2015127124.4
2016142124.4
2017108124.4
2018129124.4
2021101113.5
2022126113.5
First to last qualifying date each year at Phila 1 WSW For each year, a bar from the first to the last day at Phila 1 WSW meeting 30 C (86 F). 1950: 5 May 1950 to 31 October 19501953: 10 April 1953 to 25 October 19531954: 15 April 1954 to 15 October 19541955: 12 March 1955 to 14 November 19551957: 30 April 1957 to 23 September 19571958: 25 April 1958 to 7 October 19581959: 1 May 1959 to 12 October 19591960: 21 April 1960 to 5 October 19601961: 6 May 1961 to 1 November 19611962: 21 April 1962 to 21 October 19621963: 17 March 1963 to 24 October 19631964: 24 April 1964 to 26 September 19641965: 24 April 1965 to 18 October 19651966: 14 April 1966 to 27 September 19661967: 13 March 1967 to 15 October 19671968: 9 May 1968 to 15 October 19681969: 22 May 1969 to 20 October 19691970: 23 April 1970 to 4 October 19701971: 13 April 1971 to 18 October 19711972: 8 April 1972 to 19 October 19721973: 11 May 1973 to 13 October 19731974: 10 March 1974 to 22 September 19741975: 13 March 1975 to 14 October 19751976: 20 April 1976 to 5 October 19761977: 11 April 1977 to 1 October 19771978: 1 April 1978 to 23 October 19781979: 11 May 1979 to 9 October 19791980: 23 April 1980 to 11 October 19801981: 15 April 1981 to 6 October 19811982: 17 May 1982 to 10 October 19821983: 30 May 1983 to 4 October 19831984: 8 May 1984 to 1 November 19841986: 8 April 1986 to 6 October 19861987: 20 April 1987 to 2 November 19871988: 6 April 1988 to 1 October 19881989: 23 April 1989 to 15 September 19891990: 1 May 1990 to 3 November 19901991: 13 May 1991 to 13 October 19911992: 7 March 1992 to 22 September 19921993: 6 May 1993 to 20 October 19931994: 24 April 1994 to 3 October 19941995: 23 March 1995 to 3 October 19951996: 20 April 1996 to 28 October 19961997: 29 March 1997 to 13 October 19971998: 8 May 1998 to 2 November 19981999: 7 April 1999 to 15 October 19992000: 20 April 2000 to 2 November 20002001: 10 April 2001 to 24 September 20012002: 18 April 2002 to 7 October 20022003: 15 April 2003 to 26 October 20032004: 24 April 2004 to 28 October 20042005: 11 May 2005 to 10 November 20052006: 12 March 2006 to 19 October 20062007: 25 March 2007 to 21 October 20072008: 12 April 2008 to 30 September 20082009: 24 April 2009 to 10 October 20092010: 4 May 2010 to 27 October 20102011: 9 April 2011 to 19 October 20112012: 3 April 2012 to 29 September 20122013: 18 May 2013 to 15 October 20132014: 5 May 2014 to 14 October 20142015: 4 April 2015 to 16 October 20152016: 16 March 2016 to 1 November 20162017: 22 March 2017 to 16 October 20172018: 8 May 2018 to 15 October 20182021: 9 April 2021 to 15 October 20212022: 6 April 2022 to 8 November 202219501962197119801990199920082017JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Phila 1 WSW meeting 30 C (86 F).
First to last qualifying date each year at Phila 1 WSW
YearFirst dateLast date
19501950-05-051950-10-31
19531953-04-101953-10-25
19541954-04-151954-10-15
19551955-03-121955-11-14
19571957-04-301957-09-23
19581958-04-251958-10-07
19591959-05-011959-10-12
19601960-04-211960-10-05
19611961-05-061961-11-01
19621962-04-211962-10-21
19631963-03-171963-10-24
19641964-04-241964-09-26
19651965-04-241965-10-18
19661966-04-141966-09-27
19671967-03-131967-10-15
19681968-05-091968-10-15
19691969-05-221969-10-20
19701970-04-231970-10-04
19711971-04-131971-10-18
19721972-04-081972-10-19
19731973-05-111973-10-13
19741974-03-101974-09-22
19751975-03-131975-10-14
19761976-04-201976-10-05
19771977-04-111977-10-01
19781978-04-011978-10-23
19791979-05-111979-10-09
19801980-04-231980-10-11
19811981-04-151981-10-06
19821982-05-171982-10-10
19831983-05-301983-10-04
19841984-05-081984-11-01
19861986-04-081986-10-06
19871987-04-201987-11-02
19881988-04-061988-10-01
19891989-04-231989-09-15
19901990-05-011990-11-03
19911991-05-131991-10-13
19921992-03-071992-09-22
19931993-05-061993-10-20
19941994-04-241994-10-03
19951995-03-231995-10-03
19961996-04-201996-10-28
19971997-03-291997-10-13
19981998-05-081998-11-02
19991999-04-071999-10-15
20002000-04-202000-11-02
20012001-04-102001-09-24
20022002-04-182002-10-07
20032003-04-152003-10-26
20042004-04-242004-10-28
20052005-05-112005-11-10
20062006-03-122006-10-19
20072007-03-252007-10-21
20082008-04-122008-09-30
20092009-04-242009-10-10
20102010-05-042010-10-27
20112011-04-092011-10-19
20122012-04-032012-09-29
20132013-05-182013-10-15
20142014-05-052014-10-14
20152015-04-042015-10-16
20162016-03-162016-11-01
20172017-03-222017-10-16
20182018-05-082018-10-15
20212021-04-092021-10-15
20222022-04-062022-11-08

Every Fixed Threshold

Fixed thresholds at Phila 1 WSW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days671532007126
35 C (95 F): Days6677195423
40 C (104 F): Days2420001
90 F (32.2 C): Days67123195486
100 F (37.8 C): Days272620001
0 C (32 F): Ice days (max42719831
0 C (32 F): Frost days (min6184196368
-10 C (14 F): Days with min411319633
20 C (68 F): Tropical nights (min61116201896
25 C (77 F): Days with min15920161
10 mm (0.39 in): Days with 10 mm or more rain7061200942
25 mm (0.98 in): Days with 25 mm or more rain7029197427
50 mm (1.97 in): Days with 50 mm or more rain681519838
100 mm (3.94 in): Days with 100 mm or more rain36319832
200 mm (7.87 in): Days with 200 mm or more rain1120051
10 cm (3.9 in): Days with 10 cm or more snowfall4119621

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

Download the Data

  • Data for Phila 1 WSW 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).