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

Juneau Dwtn Threshold Days by Year (USC00504092)

12 fixed thresholds counted per year at Juneau Dwtn (USC00504092): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Juneau Dwtn Thresholds

  • Juneau Dwtn: nights with a minimum temperature at or below 0 C (32 F) in 35 years, most in 1950 with 149.
  • Juneau Dwtn: nights with a minimum temperature at or below -10 C (14 F) in 35 years, most in 1909 with 55.
  • Juneau Dwtn: days with a maximum temperature at or below 0 C (32 F) in 34 years, most in 1909 with 66.
  • Juneau Dwtn: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1947 with 102.
  • 12 fixed thresholds have at least one qualifying day at Juneau Dwtn.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Juneau Dwtn Days per year at Juneau Dwtn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 4 in 1915. 012341899: 11908: 11913: 11915: 41916: 21956: 11957: 11899190819131915191619561957
Days per year at Juneau Dwtn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 4 in 1915.
Days at or above 30 C (86 F) per year at Juneau Dwtn
YearDaysDecade average
189911
190811
191312.3
191542.3
191622.3
195611
195711
First to last qualifying date each year at Juneau Dwtn For each year, a bar from the first to the last day at Juneau Dwtn meeting 30 C (86 F). 1899: 27 July 1899 to 27 July 18991908: 14 July 1908 to 14 July 19081913: 4 June 1913 to 4 June 19131915: 11 July 1915 to 27 July 19151916: 26 June 1916 to 27 June 19161956: 13 July 1956 to 13 July 19561957: 9 August 1957 to 9 August 19571899190819131915191619561957JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Juneau Dwtn meeting 30 C (86 F).
First to last qualifying date each year at Juneau Dwtn
YearFirst dateLast date
18991899-07-271899-07-27
19081908-07-141908-07-14
19131913-06-041913-06-04
19151915-07-111915-07-27
19161916-06-261916-06-27
19561956-07-131956-07-13
19571957-08-091957-08-09

Every Fixed Threshold

Fixed thresholds at Juneau Dwtn
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days7419151
0 C (32 F): Ice days (max3466190944
0 C (32 F): Frost days (min351491950108
-10 C (14 F): Days with min3555190930
-20 C (-4 F): Days with min111019064
20 C (68 F): Tropical nights (min2619146
10 mm (0.39 in): Days with 10 mm or more rain32102194793
25 mm (0.98 in): Days with 25 mm or more rain3128194925
50 mm (1.97 in): Days with 50 mm or more rain29819484
100 mm (3.94 in): Days with 100 mm or more rain4119021
10 cm (3.9 in): Days with 10 cm or more snowfall6719524
25 cm (9.8 in): Days with 25 cm or more snowfall2119541

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

  • Data for Juneau Dwtn 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).