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

Danforth Threshold Days by Year (USC00171833)

15 fixed thresholds counted per year at Danforth (USC00171833): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Danforth Thresholds

  • Danforth: days with 10 cm (3.9 in) or more of snowfall in 17 years, most in 1997 with 15.
  • Danforth: days with a maximum temperature at or above 30 C (86 F) in 16 years, most in 1999 with 24.
  • Danforth: days with a maximum temperature at or below 0 C (32 F) in 16 years, most in 1989 with 95.
  • Danforth: nights with a minimum temperature at or below 0 C (32 F) in 16 years, most in 1992 with 221.
  • 15 fixed thresholds have at least one qualifying day at Danforth.
16 years with a qualifying day
Days at or above 30 C (86 F) per year at Danforth Days per year at Danforth with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 24 in 1999. 01020301989: 91990: 131991: 161992: 51993: 161994: 81995: 201996: 61997: 111998: 81999: 242000: 52001: 202002: 172006: 62007: 1119891991199319951997199920012006
Days per year at Danforth with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 24 in 1999.
Days at or above 30 C (86 F) per year at Danforth
YearDaysDecade average
198999
19901312.7
19911612.7
1992512.7
19931612.7
1994812.7
19952012.7
1996612.7
19971112.7
1998812.7
19992412.7
2000511.8
20012011.8
20021711.8
2006611.8
20071111.8
First to last qualifying date each year at Danforth For each year, a bar from the first to the last day at Danforth meeting 30 C (86 F). 1989: 22 June 1989 to 11 September 19891990: 28 April 1990 to 28 August 19901991: 12 June 1991 to 31 August 19911992: 22 May 1992 to 26 August 19921993: 15 June 1993 to 16 September 19931994: 1 June 1994 to 25 July 19941995: 2 June 1995 to 22 August 19951996: 12 June 1996 to 9 August 19961997: 11 June 1997 to 12 August 19971998: 15 July 1998 to 11 August 19981999: 1 June 1999 to 6 September 19992000: 17 June 2000 to 3 September 20002001: 4 May 2001 to 10 September 20012002: 22 June 2002 to 11 September 20022006: 9 July 2006 to 3 August 20062007: 10 May 2007 to 4 August 200719891991199319951997199920012006JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Danforth meeting 30 C (86 F).
First to last qualifying date each year at Danforth
YearFirst dateLast date
19891989-06-221989-09-11
19901990-04-281990-08-28
19911991-06-121991-08-31
19921992-05-221992-08-26
19931993-06-151993-09-16
19941994-06-011994-07-25
19951995-06-021995-08-22
19961996-06-121996-08-09
19971997-06-111997-08-12
19981998-07-151998-08-11
19991999-06-011999-09-06
20002000-06-172000-09-03
20012001-05-042001-09-10
20022002-06-222002-09-11
20062006-07-092006-08-03
20072007-05-102007-08-04

Every Fixed Threshold

Fixed thresholds at Danforth
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1624199911
35 C (95 F): Days2119911
90 F (32.2 C): Days14920023
0 C (32 F): Ice days (max1695198973
0 C (32 F): Frost days (min162211992169
-10 C (14 F): Days with min16115198972
-20 C (-4 F): Days with min1672198926
-30 C (-22 F): Days with min121619943
20 C (68 F): Tropical nights (min4319942
10 mm (0.39 in): Days with 10 mm or more rain1650199032
25 mm (0.98 in): Days with 25 mm or more rain1613199311
50 mm (1.97 in): Days with 50 mm or more rain13219912
10 cm (3.9 in): Days with 10 cm or more snowfall1715199710
25 cm (9.8 in): Days with 25 cm or more snowfall13319932
50 cm (19.7 in): Days with 50 cm or more snowfall1120021

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1989.

Download the Data

  • Data for Danforth 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).