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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Palermo Threshold Days by Year

12 fixed thresholds counted per year at Palermo (ITE00105250): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Palermo Thresholds

  • Palermo: days with 10 mm (0.39 in) or more of precipitation in 173 years, most in 1835 with 33.
  • Palermo: days with 25 mm (0.98 in) or more of precipitation in 165 years, most in 1931 with 11.
  • Palermo: days with 50 mm (1.97 in) or more of precipitation in 68 years, most in 1931 with 4.
  • Palermo: days with a maximum temperature at or above 30 C (86 F) in 6 years, most in 2003 with 81.
  • 12 fixed thresholds have at least one qualifying day at Palermo.
6 years with a qualifying day
Days at or above 30 C (86 F) per year at Palermo Days per year at Palermo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 81 in 2003. 02550751002003: 812004: 532005: 422006: 652007: 392008: 28200320042005200620072008
Days per year at Palermo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 81 in 2003.
Days at or above 30 C (86 F) per year at Palermo
YearDaysDecade average
20038151.3
20045351.3
20054251.3
20066551.3
20073951.3
20082851.3
First to last qualifying date each year at Palermo For each year, a bar from the first to the last day at Palermo meeting 30 C (86 F). 2003: 7 May 2003 to 22 October 20032004: 20 June 2004 to 2 November 20042005: 26 March 2005 to 10 September 20052006: 10 April 2006 to 28 October 20062007: 16 June 2007 to 18 September 20072008: 17 May 2008 to 4 November 2008200320042005200620072008JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Palermo meeting 30 C (86 F).
First to last qualifying date each year at Palermo
YearFirst dateLast date
20032003-05-072003-10-22
20042004-06-202004-11-02
20052005-03-262005-09-10
20062006-04-102006-10-28
20072007-06-162007-09-18
20082008-05-172008-11-04

Every Fixed Threshold

Fixed thresholds at Palermo
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days681200328
35 C (95 F): Days61220075
40 C (104 F): Days1320073
90 F (32.2 C): Days654200317
100 F (37.8 C): Days5720071
110 F (43.3 C): Days1120071
20 C (68 F): Tropical nights (min6110200392
25 C (77 F): Days with min63820039
10 mm (0.39 in): Days with 10 mm or more rain1733318359
25 mm (0.98 in): Days with 25 mm or more rain1651119312
50 mm (1.97 in): Days with 50 mm or more rain68419311
100 mm (3.94 in): Days with 100 mm or more rain4118571

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2003.

Download the Data

  • Data for Palermo 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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