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Built 2026-10-19 (19 October 2026)

Grantsville Threshold Days by Year (USC00183795)

15 fixed thresholds counted per year at Grantsville (USC00183795): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grantsville Thresholds

  • Grantsville: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1907 with 58.
  • Grantsville: days with 25 mm (0.98 in) or more of precipitation in 39 years, most in 1898 with 13.
  • Grantsville: days with a maximum temperature at or below 0 C (32 F) in 36 years, most in 1910 with 55.
  • Grantsville: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 1900 with 40.
  • 15 fixed thresholds have at least one qualifying day at Grantsville.
34 years with a qualifying day
Days at or above 30 C (86 F) per year at Grantsville Days per year at Grantsville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1900. 0102030401897: 211898: 221899: 231900: 401901: 241902: 131903: 121904: 191905: 181906: 31908: 91909: 21910: 11911: 171912: 101913: 271914: 331915: 91916: 161917: 71919: 111921: 61922: 81923: 71924: 41925: 151926: 91927: 51928: 51930: 241931: 271932: 91933: 171943: 24189719011905191019141919192419281933
Days per year at Grantsville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1900.
Days at or above 30 C (86 F) per year at Grantsville
YearDaysDecade average
18972122
18982222
18992322
19004015.6
19012415.6
19021315.6
19031215.6
19041915.6
19051815.6
1906315.6
1908915.6
1909215.6
1910114.6
19111714.6
19121014.6
19132714.6
19143314.6
1915914.6
19161614.6
1917714.6
19191114.6
192167.4
192287.4
192377.4
192447.4
1925157.4
192697.4
192757.4
192857.4
19302419.3
19312719.3
1932919.3
19331719.3
19432424
First to last qualifying date each year at Grantsville For each year, a bar from the first to the last day at Grantsville meeting 30 C (86 F). 1897: 16 June 1897 to 16 September 18971898: 8 June 1898 to 4 September 18981899: 1 May 1899 to 6 September 18991900: 16 May 1900 to 8 October 19001901: 11 June 1901 to 21 August 19011902: 19 May 1902 to 31 August 19021903: 18 May 1903 to 13 September 19031904: 24 May 1904 to 29 September 19041905: 15 June 1905 to 24 August 19051906: 30 June 1906 to 21 September 19061908: 23 June 1908 to 24 September 19081909: 8 August 1909 to 9 August 19091910: 3 August 1910 to 3 August 19101911: 19 May 1911 to 11 August 19111912: 7 July 1912 to 15 September 19121913: 4 May 1913 to 7 September 19131914: 25 May 1914 to 22 September 19141915: 26 April 1915 to 16 September 19151916: 8 July 1916 to 6 September 19161917: 26 June 1917 to 21 August 19171919: 30 May 1919 to 6 July 19191921: 3 July 1921 to 27 July 19211922: 11 July 1922 to 9 September 19221923: 4 June 1923 to 24 June 19231924: 4 August 1924 to 31 August 19241925: 24 April 1925 to 12 September 19251926: 20 July 1926 to 12 August 19261927: 30 June 1927 to 1 October 19271928: 8 July 1928 to 29 August 19281930: 3 June 1930 to 24 September 19301931: 13 June 1931 to 22 September 19311932: 20 July 1932 to 19 September 19321933: 7 June 1933 to 8 September 19331943: 12 June 1943 to 6 September 19431897190219081913191919251931JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Grantsville meeting 30 C (86 F).
First to last qualifying date each year at Grantsville
YearFirst dateLast date
18971897-06-161897-09-16
18981898-06-081898-09-04
18991899-05-011899-09-06
19001900-05-161900-10-08
19011901-06-111901-08-21
19021902-05-191902-08-31
19031903-05-181903-09-13
19041904-05-241904-09-29
19051905-06-151905-08-24
19061906-06-301906-09-21
19081908-06-231908-09-24
19091909-08-081909-08-09
19101910-08-031910-08-03
19111911-05-191911-08-11
19121912-07-071912-09-15
19131913-05-041913-09-07
19141914-05-251914-09-22
19151915-04-261915-09-16
19161916-07-081916-09-06
19171917-06-261917-08-21
19191919-05-301919-07-06
19211921-07-031921-07-27
19221922-07-111922-09-09
19231923-06-041923-06-24
19241924-08-041924-08-31
19251925-04-241925-09-12
19261926-07-201926-08-12
19271927-06-301927-10-01
19281928-07-081928-08-29
19301930-06-031930-09-24
19311931-06-131931-09-22
19321932-07-201932-09-19
19331933-06-071933-09-08
19431943-06-121943-09-06

Every Fixed Threshold

Fixed thresholds at Grantsville
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3440190024
35 C (95 F): Days1219302
90 F (32.2 C): Days211118972
0 C (32 F): Ice days (max3655191049
0 C (32 F): Frost days (min341801924177
-10 C (14 F): Days with min3456190445
-20 C (-4 F): Days with min291019179
-30 C (-22 F): Days with min3118991
20 C (68 F): Tropical nights (min18419013
10 mm (0.39 in): Days with 10 mm or more rain3958190732
25 mm (0.98 in): Days with 25 mm or more rain391318987
50 mm (1.97 in): Days with 50 mm or more rain18318981
100 mm (3.94 in): Days with 100 mm or more rain2118981
10 cm (3.9 in): Days with 10 cm or more snowfall2319433
25 cm (9.8 in): Days with 25 cm or more snowfall1119431

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.

Download the Data

  • Data for Grantsville 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).