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Built 2026-10-18 (18 October 2026)

Zeona 10 SSW Threshold Days by Year

19 fixed thresholds counted per year at Zeona 10 SSW (USC00399537): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Zeona 10 SSW Thresholds

  • Zeona 10 SSW: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1995 with 18.
  • Zeona 10 SSW: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1982 with 6.
  • Zeona 10 SSW: days with 10 cm (3.9 in) or more of snowfall in 37 years, most in 1985 with 8.
  • Zeona 10 SSW: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 1955 with 76.
  • 19 fixed thresholds have at least one qualifying day at Zeona 10 SSW.
33 years with a qualifying day
Days at or above 30 C (86 F) per year at Zeona 10 SSW Days per year at Zeona 10 SSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 1955. 0204060801953: 391954: 501955: 761956: 581957: 441958: 551967: 501968: 401969: 501975: 471976: 611977: 511978: 461981: 401982: 441983: 611984: 571985: 521986: 461987: 581988: 751989: 631990: 651991: 431992: 411994: 521995: 411996: 481997: 481998: 581999: 392000: 572001: 69195319571969197819841988199219972001
Days per year at Zeona 10 SSW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 1955.
Days at or above 30 C (86 F) per year at Zeona 10 SSW
YearDaysDecade average
19533953.7
19545053.7
19557653.7
19565853.7
19574453.7
19585553.7
19675046.7
19684046.7
19695046.7
19754751.3
19766151.3
19775151.3
19784651.3
19814055.1
19824455.1
19836155.1
19845755.1
19855255.1
19864655.1
19875855.1
19887555.1
19896355.1
19906548.3
19914348.3
19924148.3
19945248.3
19954148.3
19964848.3
19974848.3
19985848.3
19993948.3
20005763
20016963
First to last qualifying date each year at Zeona 10 SSW For each year, a bar from the first to the last day at Zeona 10 SSW meeting 30 C (86 F). 1953: 12 June 1953 to 9 October 19531954: 20 May 1954 to 1 September 19541955: 30 April 1955 to 10 October 19551956: 21 May 1956 to 12 October 19561957: 29 June 1957 to 2 October 19571958: 11 May 1958 to 15 October 19581967: 22 May 1967 to 30 September 19671968: 30 April 1968 to 15 September 19681969: 14 May 1969 to 28 September 19691975: 16 May 1975 to 7 October 19751976: 28 May 1976 to 2 October 19761977: 9 April 1977 to 14 September 19771978: 9 June 1978 to 25 September 19781981: 7 June 1981 to 26 September 19811982: 4 May 1982 to 11 September 19821983: 27 May 1983 to 28 September 19831984: 17 May 1984 to 20 September 19841985: 3 May 1985 to 16 September 19851986: 5 May 1986 to 1 September 19861987: 19 April 1987 to 4 October 19871988: 1 May 1988 to 17 September 19881989: 22 April 1989 to 1 October 19891990: 10 June 1990 to 6 October 19901991: 12 June 1991 to 17 October 19911992: 1 May 1992 to 3 October 19921994: 18 April 1994 to 29 September 19941995: 15 June 1995 to 16 September 19951996: 10 June 1996 to 10 September 19961997: 22 June 1997 to 8 October 19971998: 18 May 1998 to 19 September 19981999: 30 May 1999 to 24 September 19992000: 6 May 2000 to 31 August 20002001: 28 April 2001 to 2 October 20011953195819761983198819941999JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Zeona 10 SSW meeting 30 C (86 F).
First to last qualifying date each year at Zeona 10 SSW
YearFirst dateLast date
19531953-06-121953-10-09
19541954-05-201954-09-01
19551955-04-301955-10-10
19561956-05-211956-10-12
19571957-06-291957-10-02
19581958-05-111958-10-15
19671967-05-221967-09-30
19681968-04-301968-09-15
19691969-05-141969-09-28
19751975-05-161975-10-07
19761976-05-281976-10-02
19771977-04-091977-09-14
19781978-06-091978-09-25
19811981-06-071981-09-26
19821982-05-041982-09-11
19831983-05-271983-09-28
19841984-05-171984-09-20
19851985-05-031985-09-16
19861986-05-051986-09-01
19871987-04-191987-10-04
19881988-05-011988-09-17
19891989-04-221989-10-01
19901990-06-101990-10-06
19911991-06-121991-10-17
19921992-05-011992-10-03
19941994-04-181994-09-29
19951995-06-151995-09-16
19961996-06-101996-09-10
19971997-06-221997-10-08
19981998-05-181998-09-19
19991999-05-301999-09-24
20002000-05-062000-08-31
20012001-04-282001-10-02

Every Fixed Threshold

Fixed thresholds at Zeona 10 SSW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3376195569
35 C (95 F): Days3336198823
40 C (104 F): Days20519884
90 F (32.2 C): Days3355198848
100 F (37.8 C): Days301619888
110 F (43.3 C): Days1119811
0 C (32 F): Ice days (max3395197847
0 C (32 F): Frost days (min332061968183
-10 C (14 F): Days with min33104197869
-20 C (-4 F): Days with min3344197818
-30 C (-22 F): Days with min261419963
-40 C (-40 F): Days with min2119891
20 C (68 F): Tropical nights (min24819833
25 C (77 F): Days with min1119891
10 mm (0.39 in): Days with 10 mm or more rain4418199510
25 mm (0.98 in): Days with 25 mm or more rain42619822
50 mm (1.97 in): Days with 50 mm or more rain10119511
10 cm (3.9 in): Days with 10 cm or more snowfall37819854
25 cm (9.8 in): Days with 25 cm or more snowfall7119511

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1953.

Download the Data

  • Data for Zeona 10 SSW 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).