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

Istrana Threshold Days by Year (ITM00016098)

8 fixed thresholds counted per year at Istrana (ITM00016098): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Istrana Thresholds

  • Istrana: days with 10 mm (0.39 in) or more of precipitation in 17 years, most in 2011 with 25.
  • Istrana: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 2011 with 7.
  • Istrana: days with a maximum temperature at or above 30 C (86 F) in 4 years, most in 2011 with 61.
  • Istrana: days with a maximum temperature at or above 90 F (32.2 C) in 4 years, most in 2006 with 27.
  • 8 fixed thresholds have at least one qualifying day at Istrana.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at Istrana Days per year at Istrana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 61 in 2011. 0204060801981: 232006: 452011: 612025: 351981200620112025
Days per year at Istrana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 61 in 2011.
Days at or above 30 C (86 F) per year at Istrana
YearDaysDecade average
19812323
20064545
20116161
20253535
First to last qualifying date each year at Istrana For each year, a bar from the first to the last day at Istrana meeting 30 C (86 F). 1981: 1 June 1981 to 16 August 19812006: 13 June 2006 to 7 September 20062011: 9 April 2011 to 17 September 20112025: 12 June 2025 to 19 August 20251981200620112025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Istrana meeting 30 C (86 F).
First to last qualifying date each year at Istrana
YearFirst dateLast date
19811981-06-011981-08-16
20062006-06-132006-09-07
20112011-04-092011-09-17
20252025-06-122025-08-19

Every Fixed Threshold

Fixed thresholds at Istrana
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days461201135
35 C (95 F): Days3820069
90 F (32.2 C): Days427200620
0 C (32 F): Frost days (min10n/a17
20 C (68 F): Tropical nights (min10n/a20
10 mm (0.39 in): Days with 10 mm or more rain172520119
25 mm (0.98 in): Days with 25 mm or more rain17720113
50 mm (1.97 in): Days with 50 mm or more rain120n/a1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1981.

Download the Data

  • Data for Istrana 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).