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

Slana Threshold Days by Year (USC00508547)

14 fixed thresholds counted per year at Slana (USC00508547): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Slana Thresholds

  • Slana: days with 10 cm (3.9 in) or more of snowfall in 30 years, most in 1989 with 10.
  • Slana: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1959 with 19.
  • Slana: days with 25 mm (0.98 in) or more of precipitation in 24 years, most in 1958 with 3.
  • Slana: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 1965 with 257.
  • 14 fixed thresholds have at least one qualifying day at Slana.
6 years with a qualifying day
Days at or above 30 C (86 F) per year at Slana Days per year at Slana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1969. 01231958: 21965: 11966: 21969: 31983: 11993: 1195819651966196919831993
Days per year at Slana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1969.
Days at or above 30 C (86 F) per year at Slana
YearDaysDecade average
195822
196512
196622
196932
198311
199311
First to last qualifying date each year at Slana For each year, a bar from the first to the last day at Slana meeting 30 C (86 F). 1958: 20 June 1958 to 4 July 19581965: 31 July 1965 to 31 July 19651966: 17 July 1966 to 23 July 19661969: 15 June 1969 to 22 June 19691983: 30 May 1983 to 30 May 19831993: 15 July 1993 to 15 July 1993195819651966196919831993JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Slana meeting 30 C (86 F).
First to last qualifying date each year at Slana
YearFirst dateLast date
19581958-06-201958-07-04
19651965-07-311965-07-31
19661966-07-171966-07-23
19691969-06-151969-06-22
19831983-05-301983-05-30
19931993-07-151993-07-15

Every Fixed Threshold

Fixed thresholds at Slana
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days6319691
90 F (32.2 C): Days2219692
0 C (32 F): Ice days (max181541959116
0 C (32 F): Frost days (min202571965240
-10 C (14 F): Days with min201761959152
-20 C (-4 F): Days with min20100196693
-30 C (-22 F): Days with min203319649
-40 C (-40 F): Days with min10719645
10 mm (0.39 in): Days with 10 mm or more rain291919592
25 mm (0.98 in): Days with 25 mm or more rain24319583
50 mm (1.97 in): Days with 50 mm or more rain2119601
10 cm (3.9 in): Days with 10 cm or more snowfall301019895
25 cm (9.8 in): Days with 25 cm or more snowfall12219601
50 cm (19.7 in): Days with 50 cm or more snowfall1119601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

  • Data for Slana 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).