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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Arno Threshold Days by Year (RMC00914053)

9 fixed thresholds counted per year at Arno (RMC00914053): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arno Thresholds

  • Arno: days with a maximum temperature at or above 30 C (86 F) in 7 years, most in 1998 with 345.
  • Arno: nights with a minimum temperature at or above 20 C (68 F) in 7 years, most in 2020 with 366.
  • Arno: nights with a minimum temperature at or above 25 C (77 F) in 7 years, most in 2020 with 277.
  • Arno: days with 10 mm (0.39 in) or more of precipitation in 7 years, most in 1996 with 104.
  • 9 fixed thresholds have at least one qualifying day at Arno.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Arno Days per year at Arno with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 345 in 1998. 01002003004001994: 1921995: 2701996: 2571998: 3452014: 2902015: 2792020: 2331994199519961998201420152020
Days per year at Arno with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 345 in 1998.
Days at or above 30 C (86 F) per year at Arno
YearDaysDecade average
1994192266
1995270266
1996257266
1998345266
2014290284.5
2015279284.5
2020233233
First to last qualifying date each year at Arno For each year, a bar from the first to the last day at Arno meeting 30 C (86 F). 1994: 3 February 1994 to 31 December 19941995: 2 January 1995 to 31 December 19951996: 1 January 1996 to 31 December 19961998: 3 January 1998 to 31 December 19982014: 1 January 2014 to 31 December 20142015: 1 January 2015 to 29 November 20152020: 2 January 2020 to 31 December 20201994199519961998201420152020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Arno meeting 30 C (86 F).
First to last qualifying date each year at Arno
YearFirst dateLast date
19941994-02-031994-12-31
19951995-01-021995-12-31
19961996-01-011996-12-31
19981998-01-031998-12-31
20142014-01-012014-12-31
20152015-01-012015-11-29
20202020-01-022020-12-31

Every Fixed Threshold

Fixed thresholds at Arno
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days73451998233
35 C (95 F): Days2419984
90 F (32.2 C): Days616219982
20 C (68 F): Tropical nights (min73662020366
25 C (77 F): Days with min72772020277
10 mm (0.39 in): Days with 10 mm or more rain7104199695
25 mm (0.98 in): Days with 25 mm or more rain751199647
50 mm (1.97 in): Days with 50 mm or more rain718199515
100 mm (3.94 in): Days with 100 mm or more rain6320141

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1994.

Download the Data

  • Data for Arno 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).