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

Monticello Threshold Days by Year (USC00445700)

16 fixed thresholds counted per year at Monticello (USC00445700): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Monticello Thresholds

  • Monticello: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 2010 with 72.
  • Monticello: days with a maximum temperature at or above 90 F (32.2 C) in 31 years, most in 2002 with 49.
  • Monticello: days with a maximum temperature at or below 0 C (32 F) in 31 years, most in 2010 with 20.
  • Monticello: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 2003 with 121.
  • 16 fixed thresholds have at least one qualifying day at Monticello.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Monticello Days per year at Monticello with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 72 in 2010. 0204060801983: 691984: 411985: 451986: 561989: 291990: 411991: 591992: 341993: 541994: 501995: 471996: 361997: 481998: 701999: 572000: 402001: 382002: 692003: 352004: 392005: 462006: 532007: 492008: 512009: 132010: 722011: 462012: 432013: 312014: 262015: 4619831989199319972001200520092013
Days per year at Monticello with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 72 in 2010.
Days at or above 30 C (86 F) per year at Monticello
YearDaysDecade average
19836948
19844148
19854548
19865648
19892948
19904149.6
19915949.6
19923449.6
19935449.6
19945049.6
19954749.6
19963649.6
19974849.6
19987049.6
19995749.6
20004043.3
20013843.3
20026943.3
20033543.3
20043943.3
20054643.3
20065343.3
20074943.3
20085143.3
20091343.3
20107244
20114644
20124344
20133144
20142644
20154644
First to last qualifying date each year at Monticello For each year, a bar from the first to the last day at Monticello meeting 30 C (86 F). 1983: 29 April 1983 to 21 September 19831984: 28 April 1984 to 25 September 19841985: 20 April 1985 to 11 September 19851986: 1 April 1986 to 4 October 19861989: 31 May 1989 to 11 September 19891990: 12 March 1990 to 7 September 19901991: 8 April 1991 to 18 September 19911992: 12 April 1992 to 11 September 19921993: 11 May 1993 to 15 September 19931994: 25 April 1994 to 16 September 19941995: 19 April 1995 to 14 September 19951996: 13 April 1996 to 8 September 19961997: 18 May 1997 to 20 September 19971998: 27 March 1998 to 1 October 19981999: 9 April 1999 to 9 September 19992000: 8 March 2000 to 6 October 20002001: 7 April 2001 to 27 August 20012002: 14 April 2002 to 10 September 20022003: 11 June 2003 to 2 November 20032004: 18 April 2004 to 29 August 20042005: 20 April 2005 to 23 September 20052006: 29 May 2006 to 29 August 20062007: 3 May 2007 to 8 October 20072008: 1 June 2008 to 15 September 20082009: 26 April 2009 to 21 August 20092010: 7 April 2010 to 26 September 20102011: 27 May 2011 to 26 August 20112012: 29 May 2012 to 1 September 20122013: 11 April 2013 to 13 September 20132014: 9 May 2014 to 7 September 20142015: 13 May 2015 to 10 September 201519831989199319972001200520092013JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Monticello meeting 30 C (86 F).
First to last qualifying date each year at Monticello
YearFirst dateLast date
19831983-04-291983-09-21
19841984-04-281984-09-25
19851985-04-201985-09-11
19861986-04-011986-10-04
19891989-05-311989-09-11
19901990-03-121990-09-07
19911991-04-081991-09-18
19921992-04-121992-09-11
19931993-05-111993-09-15
19941994-04-251994-09-16
19951995-04-191995-09-14
19961996-04-131996-09-08
19971997-05-181997-09-20
19981998-03-271998-10-01
19991999-04-091999-09-09
20002000-03-082000-10-06
20012001-04-072001-08-27
20022002-04-142002-09-10
20032003-06-112003-11-02
20042004-04-182004-08-29
20052005-04-202005-09-23
20062006-05-292006-08-29
20072007-05-032007-10-08
20082008-06-012008-09-15
20092009-04-262009-08-21
20102010-04-072010-09-26
20112011-05-272011-08-26
20122012-05-292012-09-01
20132013-04-112013-09-13
20142014-05-092014-09-07
20152015-05-132015-09-10

Every Fixed Threshold

Fixed thresholds at Monticello
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3172201046
35 C (95 F): Days221119839
90 F (32.2 C): Days314920027
100 F (37.8 C): Days3219991
0 C (32 F): Ice days (max3120201013
0 C (32 F): Frost days (min29121200380
-10 C (14 F): Days with min2718201518
-20 C (-4 F): Days with min3119831
20 C (68 F): Tropical nights (min2948200530
25 C (77 F): Days with min7220101
10 mm (0.39 in): Days with 10 mm or more rain2866200338
25 mm (0.98 in): Days with 25 mm or more rain2821200314
50 mm (1.97 in): Days with 50 mm or more rain24520155
100 mm (3.94 in): Days with 100 mm or more rain7220031
10 cm (3.9 in): Days with 10 cm or more snowfall17620034
25 cm (9.8 in): Days with 25 cm or more snowfall4220091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1983.

Download the Data

  • Data for Monticello 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).