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Built 2026-10-19 (19 October 2026)

Portoroz-Letalisce Threshold Days by Year (SIE00115166)

12 fixed thresholds counted per year at Portoroz-Letalisce (SIE00115166): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Portoroz-Letalisce Thresholds

  • Portoroz-Letalisce: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 2003 with 70.
  • Portoroz-Letalisce: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 2005 with 71.
  • Portoroz-Letalisce: nights with a minimum temperature at or above 20 C (68 F) in 34 years, most in 2015 with 27.
  • Portoroz-Letalisce: days with a maximum temperature at or above 90 F (32.2 C) in 33 years, most in 2003 with 33.
  • 12 fixed thresholds have at least one qualifying day at Portoroz-Letalisce.
34 years with a qualifying day
Days at or above 30 C (86 F) per year at Portoroz-Letalisce Days per year at Portoroz-Letalisce with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 70 in 2003. 0204060801989: 101990: 171991: 281992: 281993: 241994: 521995: 231996: 81997: 101998: 371999: 292000: 252001: 372002: 182003: 702004: 242005: 252006: 392007: 372008: 422009: 392010: 232011: 302012: 572013: 442014: 122015: 522016: 522017: 472018: 492019: 572020: 342021: 452022: 54198919931997200120052009201320172021
Days per year at Portoroz-Letalisce with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 70 in 2003.
Days at or above 30 C (86 F) per year at Portoroz-Letalisce
YearDaysDecade average
19891010
19901725.6
19912825.6
19922825.6
19932425.6
19945225.6
19952325.6
1996825.6
19971025.6
19983725.6
19992925.6
20002535.6
20013735.6
20021835.6
20037035.6
20042435.6
20052535.6
20063935.6
20073735.6
20084235.6
20093935.6
20102342.3
20113042.3
20125742.3
20134442.3
20141242.3
20155242.3
20165242.3
20174742.3
20184942.3
20195742.3
20203444.3
20214544.3
20225444.3
First to last qualifying date each year at Portoroz-Letalisce For each year, a bar from the first to the last day at Portoroz-Letalisce meeting 30 C (86 F). 1989: 6 July 1989 to 24 August 19891990: 28 June 1990 to 29 August 19901991: 16 June 1991 to 3 September 19911992: 19 July 1992 to 29 August 19921993: 5 July 1993 to 24 August 19931994: 24 June 1994 to 13 September 19941995: 8 July 1995 to 15 August 19951996: 9 June 1996 to 2 August 19961997: 29 June 1997 to 23 August 19971998: 5 June 1998 to 23 August 19981999: 30 June 1999 to 11 September 19992000: 11 June 2000 to 26 August 20002001: 1 July 2001 to 29 August 20012002: 16 June 2002 to 4 August 20022003: 28 May 2003 to 31 August 20032004: 10 June 2004 to 7 September 20042005: 29 May 2005 to 31 August 20052006: 19 June 2006 to 7 September 20062007: 23 May 2007 to 30 August 20072008: 29 May 2008 to 12 September 20082009: 23 May 2009 to 4 September 20092010: 30 June 2010 to 27 August 20102011: 25 May 2011 to 16 September 20112012: 18 June 2012 to 10 September 20122013: 17 June 2013 to 18 August 20132014: 8 June 2014 to 13 August 20142015: 4 June 2015 to 18 September 20152016: 22 June 2016 to 11 September 20162017: 17 June 2017 to 31 August 20172018: 11 June 2018 to 20 September 20182019: 9 June 2019 to 2 September 20192020: 28 June 2020 to 17 September 20202021: 20 June 2021 to 7 September 20212022: 5 June 2022 to 27 August 20221989199419992004200920142019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Portoroz-Letalisce meeting 30 C (86 F).
First to last qualifying date each year at Portoroz-Letalisce
YearFirst dateLast date
19891989-07-061989-08-24
19901990-06-281990-08-29
19911991-06-161991-09-03
19921992-07-191992-08-29
19931993-07-051993-08-24
19941994-06-241994-09-13
19951995-07-081995-08-15
19961996-06-091996-08-02
19971997-06-291997-08-23
19981998-06-051998-08-23
19991999-06-301999-09-11
20002000-06-112000-08-26
20012001-07-012001-08-29
20022002-06-162002-08-04
20032003-05-282003-08-31
20042004-06-102004-09-07
20052005-05-292005-08-31
20062006-06-192006-09-07
20072007-05-232007-08-30
20082008-05-292008-09-12
20092009-05-232009-09-04
20102010-06-302010-08-27
20112011-05-252011-09-16
20122012-06-182012-09-10
20132013-06-172013-08-18
20142014-06-082014-08-13
20152015-06-042015-09-18
20162016-06-222016-09-11
20172017-06-172017-08-31
20182018-06-112018-09-20
20192019-06-092019-09-02
20202020-06-282020-09-17
20212021-06-202021-09-07
20222022-06-052022-08-27

Every Fixed Threshold

Fixed thresholds at Portoroz-Letalisce
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3470200354
35 C (95 F): Days16920156
90 F (32.2 C): Days3333200332
0 C (32 F): Ice days (max7620122
0 C (32 F): Frost days (min3471200545
-10 C (14 F): Days with min2319912
20 C (68 F): Tropical nights (min3427201523
25 C (77 F): Days with min2119941
10 mm (0.39 in): Days with 10 mm or more rain3345201425
25 mm (0.98 in): Days with 25 mm or more rain331820177
50 mm (1.97 in): Days with 50 mm or more rain28519914
100 mm (3.94 in): Days with 100 mm or more rain4220101

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1989.

Download the Data

  • Data for Portoroz-Letalisce 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).