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Built 2026-10-17 (17 October 2026)

Mortlake Racecourse Threshold Days by Year

13 fixed thresholds counted per year at Mortlake Racecourse (ASN00090176): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mortlake Racecourse Thresholds

  • Mortlake Racecourse: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 2019 with 47.
  • Mortlake Racecourse: days with a maximum temperature at or above 35 C (95 F) in 36 years, most in 2019 with 21.
  • Mortlake Racecourse: days with a maximum temperature at or above 90 F (32.2 C) in 36 years, most in 2025 with 34.
  • Mortlake Racecourse: nights with a minimum temperature at or below 0 C (32 F) in 35 years, most in 2006 with 24.
  • 13 fixed thresholds have at least one qualifying day at Mortlake Racecourse.
36 years with a qualifying day
Days at or above 30 C (86 F) per year at Mortlake Racecourse Days per year at Mortlake Racecourse with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 2019. 02040601991: 121992: 161993: 201994: 291995: 231996: 181997: 251998: 271999: 302000: 392001: 292002: 262003: 262004: 202005: 302006: 392007: 422008: 302009: 422010: 242011: 222012: 362013: 412014: 422015: 422016: 322017: 402018: 422019: 472020: 272021: 232022: 242023: 262024: 322025: 442026: 24199119951999200320072011201520192023
Days per year at Mortlake Racecourse with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 2019.
Days at or above 30 C (86 F) per year at Mortlake Racecourse
YearDaysDecade average
19911222.2
19921622.2
19932022.2
19942922.2
19952322.2
19961822.2
19972522.2
19982722.2
19993022.2
20003932.3
20012932.3
20022632.3
20032632.3
20042032.3
20053032.3
20063932.3
20074232.3
20083032.3
20094232.3
20102436.8
20112236.8
20123636.8
20134136.8
20144236.8
20154236.8
20163236.8
20174036.8
20184236.8
20194736.8
20202728.6
20212328.6
20222428.6
20232628.6
20243228.6
20254428.6
20262428.6
First to last qualifying date each year at Mortlake Racecourse For each year, a bar from the first to the last day at Mortlake Racecourse meeting 30 C (86 F). 1991: 1 January 1991 to 17 March 19911992: 19 January 1992 to 31 December 19921993: 2 January 1993 to 10 December 19931994: 12 January 1994 to 28 December 19941995: 3 January 1995 to 7 March 19951996: 13 January 1996 to 21 December 19961997: 4 January 1997 to 31 December 19971998: 1 January 1998 to 23 December 19981999: 1 January 1999 to 25 December 19992000: 8 January 2000 to 31 December 20002001: 1 January 2001 to 29 December 20012002: 10 January 2002 to 30 December 20022003: 6 January 2003 to 30 December 20032004: 19 January 2004 to 31 December 20042005: 10 January 2005 to 31 December 20052006: 8 January 2006 to 30 December 20062007: 2 January 2007 to 31 December 20072008: 4 January 2008 to 13 November 20082009: 13 January 2009 to 31 December 20092010: 8 January 2010 to 31 December 20102011: 6 January 2011 to 31 December 20112012: 1 January 2012 to 23 December 20122013: 3 January 2013 to 28 December 20132014: 9 January 2014 to 28 December 20142015: 2 January 2015 to 31 December 20152016: 10 January 2016 to 28 December 20162017: 4 January 2017 to 27 December 20172018: 5 January 2018 to 28 December 20182019: 3 January 2019 to 30 December 20192020: 9 January 2020 to 14 December 20202021: 1 January 2021 to 31 December 20212022: 1 January 2022 to 27 December 20222023: 1 January 2023 to 18 December 20232024: 6 January 2024 to 26 December 20242025: 3 January 2025 to 29 December 20252026: 6 January 2026 to 31 March 202619911996200120062011201620212026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mortlake Racecourse meeting 30 C (86 F).
First to last qualifying date each year at Mortlake Racecourse
YearFirst dateLast date
19911991-01-011991-03-17
19921992-01-191992-12-31
19931993-01-021993-12-10
19941994-01-121994-12-28
19951995-01-031995-03-07
19961996-01-131996-12-21
19971997-01-041997-12-31
19981998-01-011998-12-23
19991999-01-011999-12-25
20002000-01-082000-12-31
20012001-01-012001-12-29
20022002-01-102002-12-30
20032003-01-062003-12-30
20042004-01-192004-12-31
20052005-01-102005-12-31
20062006-01-082006-12-30
20072007-01-022007-12-31
20082008-01-042008-11-13
20092009-01-132009-12-31
20102010-01-082010-12-31
20112011-01-062011-12-31
20122012-01-012012-12-23
20132013-01-032013-12-28
20142014-01-092014-12-28
20152015-01-022015-12-31
20162016-01-102016-12-28
20172017-01-042017-12-27
20182018-01-052018-12-28
20192019-01-032019-12-30
20202020-01-092020-12-14
20212021-01-012021-12-31
20222022-01-012022-12-27
20232023-01-012023-12-18
20242024-01-062024-12-26
20252025-01-032025-12-29
20262026-01-062026-03-31

Every Fixed Threshold

Fixed thresholds at Mortlake Racecourse
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3647201924
35 C (95 F): Days362120196
40 C (104 F): Days27520143
45 C (113 F): Days2120091
90 F (32.2 C): Days3634202515
100 F (37.8 C): Days321120194
110 F (43.3 C): Days6320091
0 C (32 F): Frost days (min3524200610
20 C (68 F): Tropical nights (min25820012
25 C (77 F): Days with min1120061
10 mm (0.39 in): Days with 10 mm or more rain3125200110
25 mm (0.98 in): Days with 25 mm or more rain25720102
50 mm (1.97 in): Days with 50 mm or more rain4220081

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1991.

Download the Data

  • Data for Mortlake Racecourse 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).