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Built 2026-10-19 (19 October 2026)

Penwell Threshold Days by Year (USC00416932)

18 fixed thresholds counted per year at Penwell (USC00416932): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Penwell Thresholds

  • Penwell: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1986 with 18.
  • Penwell: days with 25 mm (0.98 in) or more of precipitation in 47 years, most in 1980 with 7.
  • Penwell: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2011 with 199.
  • Penwell: days with a maximum temperature at or above 35 C (95 F) in 30 years, most in 2011 with 138.
  • 18 fixed thresholds have at least one qualifying day at Penwell.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Penwell Days per year at Penwell with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 199 in 2011. 0501001502001964: 1481970: 1481980: 1281981: 1261982: 1501983: 1481984: 1341985: 1461986: 1381987: 1131988: 1371989: 1611990: 1291991: 1461992: 1211993: 1541994: 1491995: 1491996: 1601997: 1401998: 1721999: 1582000: 1612001: 1662002: 1642003: 1552004: 1312010: 1632011: 1992012: 1761964198119841987199019931996199920022010
Days per year at Penwell with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 199 in 2011.
Days at or above 30 C (86 F) per year at Penwell
YearDaysDecade average
1964148148
1970148148
1980128138.1
1981126138.1
1982150138.1
1983148138.1
1984134138.1
1985146138.1
1986138138.1
1987113138.1
1988137138.1
1989161138.1
1990129147.8
1991146147.8
1992121147.8
1993154147.8
1994149147.8
1995149147.8
1996160147.8
1997140147.8
1998172147.8
1999158147.8
2000161155.4
2001166155.4
2002164155.4
2003155155.4
2004131155.4
2010163179.3
2011199179.3
2012176179.3
First to last qualifying date each year at Penwell For each year, a bar from the first to the last day at Penwell meeting 30 C (86 F). 1964: 1 April 1964 to 18 October 19641970: 11 April 1970 to 14 October 19701980: 11 April 1980 to 8 November 19801981: 9 April 1981 to 26 November 19811982: 5 April 1982 to 1 November 19821983: 1 April 1983 to 8 October 19831984: 15 February 1984 to 12 October 19841985: 12 March 1985 to 8 October 19851986: 18 February 1986 to 4 October 19861987: 12 April 1987 to 5 November 19871988: 25 March 1988 to 9 November 19881989: 27 February 1989 to 25 October 19891990: 23 March 1990 to 18 October 19901991: 6 March 1991 to 23 October 19911992: 8 April 1992 to 26 October 19921993: 25 March 1993 to 19 October 19931994: 8 March 1994 to 7 October 19941995: 19 March 1995 to 11 November 19951996: 19 February 1996 to 21 November 19961997: 14 March 1997 to 1 November 19971998: 24 March 1998 to 17 October 19981999: 11 February 1999 to 30 October 19992000: 27 March 2000 to 6 October 20002001: 3 April 2001 to 3 November 20012002: 24 February 2002 to 16 October 20022003: 16 March 2003 to 11 November 20032004: 19 March 2004 to 22 October 20042010: 27 March 2010 to 1 November 20102011: 17 February 2011 to 26 October 20112012: 8 March 2012 to 9 November 201219641982198619901994199820022011JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Penwell meeting 30 C (86 F).
First to last qualifying date each year at Penwell
YearFirst dateLast date
19641964-04-011964-10-18
19701970-04-111970-10-14
19801980-04-111980-11-08
19811981-04-091981-11-26
19821982-04-051982-11-01
19831983-04-011983-10-08
19841984-02-151984-10-12
19851985-03-121985-10-08
19861986-02-181986-10-04
19871987-04-121987-11-05
19881988-03-251988-11-09
19891989-02-271989-10-25
19901990-03-231990-10-18
19911991-03-061991-10-23
19921992-04-081992-10-26
19931993-03-251993-10-19
19941994-03-081994-10-07
19951995-03-191995-11-11
19961996-02-191996-11-21
19971997-03-141997-11-01
19981998-03-241998-10-17
19991999-02-111999-10-30
20002000-03-272000-10-06
20012001-04-032001-11-03
20022002-02-242002-10-16
20032003-03-162003-11-11
20042004-03-192004-10-22
20102010-03-272010-11-01
20112011-02-172011-10-26
20122012-03-082012-11-09

Every Fixed Threshold

Fixed thresholds at Penwell
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days301992011176
35 C (95 F): Days301382011115
40 C (104 F): Days2750201125
45 C (113 F): Days2419942
90 F (32.2 C): Days301682011156
100 F (37.8 C): Days3092201158
110 F (43.3 C): Days7720117
0 C (32 F): Ice days (max251019895
0 C (32 F): Frost days (min3092201045
-10 C (14 F): Days with min221719899
-20 C (-4 F): Days with min1119851
20 C (68 F): Tropical nights (min30101201197
25 C (77 F): Days with min131520119
10 mm (0.39 in): Days with 10 mm or more rain511819867
25 mm (0.98 in): Days with 25 mm or more rain47719803
50 mm (1.97 in): Days with 50 mm or more rain23420041
100 mm (3.94 in): Days with 100 mm or more rain10n/a1
10 cm (3.9 in): Days with 10 cm or more snowfall7219851

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

Download the Data

  • Data for Penwell 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).