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Built 2026-10-19 (19 October 2026)

Helsinki Ilmala Threshold Days by Year (FIE00142101)

10 fixed thresholds counted per year at Helsinki Ilmala (FIE00142101): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Helsinki Ilmala Thresholds

  • Helsinki Ilmala: days with a maximum temperature at or below 0 C (32 F) in 32 years, most in 1963 with 106.
  • Helsinki Ilmala: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 1968 with 172.
  • Helsinki Ilmala: nights with a minimum temperature at or below -10 C (14 F) in 24 years, most in 1963 with 75.
  • Helsinki Ilmala: days with 10 mm (0.39 in) or more of precipitation in 24 years, most in 1974 with 26.
  • 10 fixed thresholds have at least one qualifying day at Helsinki Ilmala.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at Helsinki Ilmala Days per year at Helsinki Ilmala with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1975. 01231972: 11973: 11975: 32018: 21972197319752018
Days per year at Helsinki Ilmala with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1975.
Days at or above 30 C (86 F) per year at Helsinki Ilmala
YearDaysDecade average
197211.7
197311.7
197531.7
201822
First to last qualifying date each year at Helsinki Ilmala For each year, a bar from the first to the last day at Helsinki Ilmala meeting 30 C (86 F). 1972: 28 June 1972 to 28 June 19721973: 6 July 1973 to 6 July 19731975: 5 August 1975 to 8 August 19752018: 17 July 2018 to 2 August 20181972197319752018JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Helsinki Ilmala meeting 30 C (86 F).
First to last qualifying date each year at Helsinki Ilmala
YearFirst dateLast date
19721972-06-281972-06-28
19731973-07-061973-07-06
19751975-08-051975-08-08
20182018-07-172018-08-02

Every Fixed Threshold

Fixed thresholds at Helsinki Ilmala
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4319752
0 C (32 F): Ice days (max32106196354
0 C (32 F): Frost days (min24172196869
-10 C (14 F): Days with min2475196333
-20 C (-4 F): Days with min211519671
-30 C (-22 F): Days with min2119661
20 C (68 F): Tropical nights (min3420254
10 mm (0.39 in): Days with 10 mm or more rain242619743
25 mm (0.98 in): Days with 25 mm or more rain16419631
50 mm (1.97 in): Days with 50 mm or more rain3219601

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 Helsinki Ilmala 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 (2026-10-17).