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

Glen Ullin Threshold Days by Year (USC00323496)

7 fixed thresholds counted per year at Glen Ullin (USC00323496): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Glen Ullin Thresholds

  • Glen Ullin: days with 10 cm (3.9 in) or more of snowfall in 20 years, most in 2008 with 7.
  • Glen Ullin: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1998 with 22.
  • Glen Ullin: days with 25 mm (0.98 in) or more of precipitation in 18 years, most in 1996 with 8.
  • Glen Ullin: days with 50 mm (1.97 in) or more of precipitation in 6 years, most in 1996 with 2.
  • 7 fixed thresholds have at least one qualifying day at Glen Ullin.
18 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Glen Ullin Days per year at Glen Ullin with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1998. 01020301949: 111950: 101987: 121988: 81989: 121990: 91991: 141994: 121996: 171998: 221999: 142000: 162001: 202004: 102006: 92009: 192010: 182015: 12194919871989199119961999200120062010
Days per year at Glen Ullin with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1998.
Days with 10 mm (0.39 in) or more of precipitation per year at Glen Ullin
YearDaysDecade average
19491111
19501010
19871210.7
1988810.7
19891210.7
1990914.7
19911414.7
19941214.7
19961714.7
19982214.7
19991414.7
20001614.8
20012014.8
20041014.8
2006914.8
20091914.8
20101815
20151215
First to last qualifying date each year at Glen Ullin For each year, a bar from the first to the last day at Glen Ullin meeting 10 mm (0.39 in). 1949: 23 March 1949 to 18 October 19491950: 23 March 1950 to 2 October 19501987: 18 March 1987 to 15 August 19871988: 11 January 1988 to 26 December 19881989: 7 April 1989 to 28 October 19891990: 15 May 1990 to 17 October 19901991: 12 April 1991 to 29 October 19911994: 23 March 1994 to 27 November 19941996: 17 January 1996 to 23 November 19961998: 25 February 1998 to 30 December 19981999: 1 April 1999 to 25 September 19992000: 15 February 2000 to 1 November 20002001: 3 April 2001 to 8 October 20012004: 24 January 2004 to 29 October 20042006: 18 March 2006 to 21 September 20062009: 9 January 2009 to 27 December 20092010: 22 January 2010 to 3 December 20102015: 5 May 2015 to 23 October 2015194919881991199820012009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Glen Ullin meeting 10 mm (0.39 in).
First to last qualifying date each year at Glen Ullin
YearFirst dateLast date
19491949-03-231949-10-18
19501950-03-231950-10-02
19871987-03-181987-08-15
19881988-01-111988-12-26
19891989-04-071989-10-28
19901990-05-151990-10-17
19911991-04-121991-10-29
19941994-03-231994-11-27
19961996-01-171996-11-23
19981998-02-251998-12-30
19991999-04-011999-09-25
20002000-02-152000-11-01
20012001-04-032001-10-08
20042004-01-242004-10-29
20062006-03-182006-09-21
20092009-01-092009-12-27
20102010-01-222010-12-03
20152015-05-052015-10-23

Every Fixed Threshold

Fixed thresholds at Glen Ullin
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1822199812
25 mm (0.98 in): Days with 25 mm or more rain18819963
50 mm (1.97 in): Days with 50 mm or more rain6219962
100 mm (3.94 in): Days with 100 mm or more rain1119941
10 cm (3.9 in): Days with 10 cm or more snowfall20720086
25 cm (9.8 in): Days with 25 cm or more snowfall4320093
50 cm (19.7 in): Days with 50 cm or more snowfall1120091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Glen Ullin 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).