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

Porvoo Jernbole Threshold Days by Year (FIE00142266)

11 fixed thresholds counted per year at Porvoo Jernbole (FIE00142266): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Porvoo Jernbole Thresholds

  • Porvoo Jernbole: nights with a minimum temperature at or below 0 C (32 F) in 47 years, most in 1976 with 198.
  • Porvoo Jernbole: nights with a minimum temperature at or below -10 C (14 F) in 47 years, most in 1963 with 91.
  • Porvoo Jernbole: days with 10 mm (0.39 in) or more of precipitation in 47 years, most in 1990 with 29.
  • Porvoo Jernbole: days with a maximum temperature at or below 0 C (32 F) in 46 years, most in 1963 with 109.
  • 11 fixed thresholds have at least one qualifying day at Porvoo Jernbole.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Porvoo Jernbole Days per year at Porvoo Jernbole with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 5 in 1994. 02461972: 21973: 11975: 21980: 11983: 21988: 11992: 11994: 51997: 11999: 32003: 52005: 2197219751983199219972003
Days per year at Porvoo Jernbole with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 5 in 1994.
Days at or above 30 C (86 F) per year at Porvoo Jernbole
YearDaysDecade average
197221.7
197311.7
197521.7
198011.3
198321.3
198811.3
199212.5
199452.5
199712.5
199932.5
200353.5
200523.5
First to last qualifying date each year at Porvoo Jernbole For each year, a bar from the first to the last day at Porvoo Jernbole meeting 30 C (86 F). 1972: 27 June 1972 to 28 June 19721973: 6 July 1973 to 6 July 19731975: 6 August 1975 to 8 August 19751980: 31 July 1980 to 31 July 19801983: 10 July 1983 to 25 July 19831988: 28 June 1988 to 28 June 19881992: 11 August 1992 to 11 August 19921994: 14 July 1994 to 30 July 19941997: 21 July 1997 to 21 July 19971999: 26 June 1999 to 3 August 19992003: 14 July 2003 to 31 July 20032005: 10 July 2005 to 11 July 2005197219751983199219972003JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Porvoo Jernbole meeting 30 C (86 F).
First to last qualifying date each year at Porvoo Jernbole
YearFirst dateLast date
19721972-06-271972-06-28
19731973-07-061973-07-06
19751975-08-061975-08-08
19801980-07-311980-07-31
19831983-07-101983-07-25
19881988-06-281988-06-28
19921992-08-111992-08-11
19941994-07-141994-07-30
19971997-07-211997-07-21
19991999-06-261999-08-03
20032003-07-142003-07-31
20052005-07-102005-07-11

Every Fixed Threshold

Fixed thresholds at Porvoo Jernbole
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days12519942
90 F (32.2 C): Days2219942
0 C (32 F): Ice days (max46109196366
0 C (32 F): Frost days (min471981976152
-10 C (14 F): Days with min4791196337
-20 C (-4 F): Days with min464619858
-30 C (-22 F): Days with min271519663
20 C (68 F): Tropical nights (min4219881
10 mm (0.39 in): Days with 10 mm or more rain4729199019
25 mm (0.98 in): Days with 25 mm or more rain35520041
50 mm (1.97 in): Days with 50 mm or more rain2119601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1972.

Download the Data

  • Data for Porvoo Jernbole 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).