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Built 2026-10-15 (15 October 2026)

Helsinki Kaisaniemi AWS Threshold Days by Year

11 fixed thresholds counted per year at Helsinki Kaisaniemi AWS (FI000000304): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Helsinki Kaisaniemi AWS Thresholds

  • Helsinki Kaisaniemi AWS: nights with a minimum temperature at or below 0 C (32 F) in 76 years, most in 1952 with 165.
  • Helsinki Kaisaniemi AWS: days with 10 mm (0.39 in) or more of precipitation in 76 years, most in 1974 with 25.
  • Helsinki Kaisaniemi AWS: days with a maximum temperature at or below 0 C (32 F) in 75 years, most in 2010 with 106.
  • Helsinki Kaisaniemi AWS: nights with a minimum temperature at or below -10 C (14 F) in 75 years, most in 1963 with 71.
  • 11 fixed thresholds have at least one qualifying day at Helsinki Kaisaniemi AWS.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Helsinki Kaisaniemi AWS Days per year at Helsinki Kaisaniemi AWS with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 1975. 011221972: 11975: 21983: 22010: 12018: 22019: 12021: 21972197519832010201820192021
Days per year at Helsinki Kaisaniemi AWS with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 1975.
Days at or above 30 C (86 F) per year at Helsinki Kaisaniemi AWS
YearDaysDecade average
197211.5
197521.5
198322
201011.3
201821.3
201911.3
202122
First to last qualifying date each year at Helsinki Kaisaniemi AWS For each year, a bar from the first to the last day at Helsinki Kaisaniemi AWS meeting 30 C (86 F). 1972: 28 June 1972 to 28 June 19721975: 6 August 1975 to 8 August 19751983: 10 July 1983 to 11 July 19832010: 14 July 2010 to 14 July 20102018: 17 July 2018 to 2 August 20182019: 28 July 2019 to 28 July 20192021: 14 July 2021 to 15 July 20211972197519832010201820192021JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Helsinki Kaisaniemi AWS meeting 30 C (86 F).
First to last qualifying date each year at Helsinki Kaisaniemi AWS
YearFirst dateLast date
19721972-06-281972-06-28
19751975-08-061975-08-08
19831983-07-101983-07-11
20102010-07-142010-07-14
20182018-07-172018-08-02
20192019-07-282019-07-28
20212021-07-142021-07-15

Every Fixed Threshold

Fixed thresholds at Helsinki Kaisaniemi AWS
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days7219752
90 F (32.2 C): Days1120191
0 C (32 F): Ice days (max75106201054
0 C (32 F): Frost days (min76165195272
-10 C (14 F): Days with min7571196332
-20 C (-4 F): Days with min512119852
-30 C (-22 F): Days with min2619876
20 C (68 F): Tropical nights (min191020184
10 mm (0.39 in): Days with 10 mm or more rain762519746
25 mm (0.98 in): Days with 25 mm or more rain57620041
50 mm (1.97 in): Days with 50 mm or more rain6119601

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 Kaisaniemi AWS 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-12).