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Built 2026-10-19 (19 October 2026)

Olmsted L&D Threshold Days by Year (USC00113580)

17 fixed thresholds counted per year at Olmsted L&D (USC00113580): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Olmsted L&D Thresholds

  • Olmsted L&D: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1945 with 55.
  • Olmsted L&D: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 2019 with 23.
  • Olmsted L&D: days with 50 mm (1.97 in) or more of precipitation in 50 years, most in 1928 with 6.
  • Olmsted L&D: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1925 with 111.
  • 17 fixed thresholds have at least one qualifying day at Olmsted L&D.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Olmsted L&D Days per year at Olmsted L&D with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 111 in 1925. 0501001501924: 761925: 1111926: 961927: 611928: 671996: 651997: 601998: 891999: 842000: 672001: 472002: 912003: 572004: 492005: 782006: 712007: 932008: 682009: 442010: 922013: 622015: 612019: 842021: 662022: 762024: 792025: 712026: 751924192719972000200320062009201520222026
Days per year at Olmsted L&D with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 111 in 1925.
Days at or above 30 C (86 F) per year at Olmsted L&D
YearDaysDecade average
19247682.2
192511182.2
19269682.2
19276182.2
19286782.2
19966574.5
19976074.5
19988974.5
19998474.5
20006766.5
20014766.5
20029166.5
20035766.5
20044966.5
20057866.5
20067166.5
20079366.5
20086866.5
20094466.5
20109274.8
20136274.8
20156174.8
20198474.8
20216673.4
20227673.4
20247973.4
20257173.4
20267573.4
First to last qualifying date each year at Olmsted L&D For each year, a bar from the first to the last day at Olmsted L&D meeting 30 C (86 F). 1924: 16 April 1924 to 19 October 19241925: 23 April 1925 to 30 September 19251926: 1 May 1926 to 3 October 19261927: 10 June 1927 to 26 October 19271928: 10 May 1928 to 14 October 19281996: 25 May 1996 to 12 September 19961997: 19 May 1997 to 20 September 19971998: 19 May 1998 to 6 October 19981999: 5 June 1999 to 30 September 19992000: 25 May 2000 to 6 October 20002001: 16 May 2001 to 24 September 20012002: 2 June 2002 to 5 October 20022003: 20 June 2003 to 19 September 20032004: 21 May 2004 to 16 September 20042005: 12 May 2005 to 17 October 20052006: 25 May 2006 to 5 October 20062007: 10 May 2007 to 9 October 20072008: 1 June 2008 to 30 September 20082009: 2 June 2009 to 12 September 20092010: 24 May 2010 to 11 October 20102013: 20 May 2013 to 5 October 20132015: 26 May 2015 to 19 September 20152019: 17 May 2019 to 3 October 20192021: 23 May 2021 to 30 September 20212022: 11 May 2022 to 25 September 20222024: 3 May 2024 to 13 October 20242025: 3 June 2025 to 3 October 20252026: 18 May 2026 to 14 October 20261924192819992003200720132022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Olmsted L&D meeting 30 C (86 F).
First to last qualifying date each year at Olmsted L&D
YearFirst dateLast date
19241924-04-161924-10-19
19251925-04-231925-09-30
19261926-05-011926-10-03
19271927-06-101927-10-26
19281928-05-101928-10-14
19961996-05-251996-09-12
19971997-05-191997-09-20
19981998-05-191998-10-06
19991999-06-051999-09-30
20002000-05-252000-10-06
20012001-05-162001-09-24
20022002-06-022002-10-05
20032003-06-202003-09-19
20042004-05-212004-09-16
20052005-05-122005-10-17
20062006-05-252006-10-05
20072007-05-102007-10-09
20082008-06-012008-09-30
20092009-06-022009-09-12
20102010-05-242010-10-11
20132013-05-202013-10-05
20152015-05-262015-09-19
20192019-05-172019-10-03
20212021-05-232021-09-30
20222022-05-112022-09-25
20242024-05-032024-10-13
20252025-06-032025-10-03
20262026-05-182026-10-14

Every Fixed Threshold

Fixed thresholds at Olmsted L&D
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days28111192575
35 C (95 F): Days2749192514
40 C (104 F): Days1619256
90 F (32.2 C): Days2890192541
100 F (37.8 C): Days71419251
0 C (32 F): Ice days (max2826201010
0 C (32 F): Frost days (min2691199646
-10 C (14 F): Days with min2619192411
-20 C (-4 F): Days with min6219242
20 C (68 F): Tropical nights (min2684202589
25 C (77 F): Days with min191120257
10 mm (0.39 in): Days with 10 mm or more rain5455194527
25 mm (0.98 in): Days with 25 mm or more rain5423201911
50 mm (1.97 in): Days with 50 mm or more rain50619285
100 mm (3.94 in): Days with 100 mm or more rain14219421
10 cm (3.9 in): Days with 10 cm or more snowfall6219941
25 cm (9.8 in): Days with 25 cm or more snowfall1119941

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.

Download the Data

  • Data for Olmsted L&D 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 (2026-10-17).