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Built 2026-10-19 (19 October 2026)

Summit Grd STN Threshold Days by Year (USC00358190)

15 fixed thresholds counted per year at Summit Grd STN (USC00358190): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Summit Grd STN Thresholds

  • Summit Grd STN: days with a maximum temperature at or below 0 C (32 F) in 26 years, most in 1922 with 70.
  • Summit Grd STN: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1896 with 108.
  • Summit Grd STN: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1899 with 46.
  • Summit Grd STN: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1946 with 212.
  • 15 fixed thresholds have at least one qualifying day at Summit Grd STN.
22 years with a qualifying day
Days at or above 30 C (86 F) per year at Summit Grd STN Days per year at Summit Grd STN with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1917. 051015201896: 71897: 91898: 121899: 51901: 71902: 31904: 41905: 11906: 31907: 11909: 21910: 21916: 81917: 161919: 61920: 11922: 51942: 71943: 21944: 81945: 61946: 518961899190419071916192019431946
Days per year at Summit Grd STN with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1917.
Days at or above 30 C (86 F) per year at Summit Grd STN
YearDaysDecade average
189678.3
189798.3
1898128.3
189958.3
190173
190233
190443
190513
190633
190713
190923
191028
191688
1917168
191968
192013
192253
194275.6
194325.6
194485.6
194565.6
194655.6
First to last qualifying date each year at Summit Grd STN For each year, a bar from the first to the last day at Summit Grd STN meeting 30 C (86 F). 1896: 26 June 1896 to 23 August 18961897: 10 July 1897 to 20 August 18971898: 27 July 1898 to 18 September 18981899: 14 July 1899 to 25 September 18991901: 4 August 1901 to 22 August 19011902: 19 July 1902 to 10 August 19021904: 29 June 1904 to 16 August 19041905: 21 July 1905 to 21 July 19051906: 3 July 1906 to 14 July 19061907: 31 July 1907 to 31 July 19071909: 21 July 1909 to 8 September 19091910: 10 July 1910 to 19 July 19101916: 15 June 1916 to 27 August 19161917: 14 July 1917 to 8 October 19171919: 14 July 1919 to 29 August 19191920: 12 August 1920 to 12 August 19201922: 2 July 1922 to 30 July 19221942: 30 June 1942 to 18 August 19421943: 24 July 1943 to 24 September 19431944: 18 July 1944 to 11 September 19441945: 7 July 1945 to 22 August 19451946: 19 July 1946 to 22 August 194618961899190419071916192019431946JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Summit Grd STN meeting 30 C (86 F).
First to last qualifying date each year at Summit Grd STN
YearFirst dateLast date
18961896-06-261896-08-23
18971897-07-101897-08-20
18981898-07-271898-09-18
18991899-07-141899-09-25
19011901-08-041901-08-22
19021902-07-191902-08-10
19041904-06-291904-08-16
19051905-07-211905-07-21
19061906-07-031906-07-14
19071907-07-311907-07-31
19091909-07-211909-09-08
19101910-07-101910-07-19
19161916-06-151916-08-27
19171917-07-141917-10-08
19191919-07-141919-08-29
19201920-08-121920-08-12
19221922-07-021922-07-30
19421942-06-301942-08-18
19431943-07-241943-09-24
19441944-07-181944-09-11
19451945-07-071945-08-22
19461946-07-191946-08-22

Every Fixed Threshold

Fixed thresholds at Summit Grd STN
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days221619175
35 C (95 F): Days3118971
90 F (32.2 C): Days15618971
0 C (32 F): Ice days (max2670192219
0 C (32 F): Frost days (min252121946212
-10 C (14 F): Days with min2532194418
-20 C (-4 F): Days with min8418991
20 C (68 F): Tropical nights (min3118971
10 mm (0.39 in): Days with 10 mm or more rain26108189678
25 mm (0.98 in): Days with 25 mm or more rain2646189923
50 mm (1.97 in): Days with 50 mm or more rain241018999
100 mm (3.94 in): Days with 100 mm or more rain8219211
10 cm (3.9 in): Days with 10 cm or more snowfall2461189636
25 cm (9.8 in): Days with 25 cm or more snowfall241418997
50 cm (19.7 in): Days with 50 cm or more snowfall4119071

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

  • Data for Summit Grd STN 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).