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Built 2026-10-19 (19 October 2026)

Annapolis US Naval Academy Aso Threshold Days by Year (USW00013752)

16 fixed thresholds counted per year at Annapolis US Naval Academy Aso (USW00013752): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Annapolis US Naval Academy Aso Thresholds

  • Annapolis US Naval Academy Aso: days with a maximum temperature at or above 30 C (86 F) in 41 years, most in 2019 with 79.
  • Annapolis US Naval Academy Aso: days with a maximum temperature at or above 90 F (32.2 C) in 41 years, most in 2019 with 46.
  • Annapolis US Naval Academy Aso: nights with a minimum temperature at or below 0 C (32 F) in 41 years, most in 1960 with 88.
  • Annapolis US Naval Academy Aso: nights with a minimum temperature at or above 20 C (68 F) in 41 years, most in 2019 with 120.
  • 16 fixed thresholds have at least one qualifying day at Annapolis US Naval Academy Aso.
41 years with a qualifying day
Days at or above 30 C (86 F) per year at Annapolis US Naval Academy Aso Days per year at Annapolis US Naval Academy Aso with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 79 in 2019. 0204060801946: 121947: 191948: 281949: 351950: 161951: 241952: 411953: 411954: 291955: 441956: 311957: 381958: 301959: 541960: 251961: 452002: 462003: 282004: 252005: 432006: 392007: 382008: 442009: 292010: 602011: 522012: 632013: 342014: 182015: 362016: 522017: 502018: 682019: 792020: 492021: 482022: 452023: 322024: 362025: 352026: 50194619511956196120062011201620212026
Days per year at Annapolis US Naval Academy Aso with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 79 in 2019.
Days at or above 30 C (86 F) per year at Annapolis US Naval Academy Aso
YearDaysDecade average
19461223.5
19471923.5
19482823.5
19493523.5
19501634.8
19512434.8
19524134.8
19534134.8
19542934.8
19554434.8
19563134.8
19573834.8
19583034.8
19595434.8
19602535
19614535
20024636.5
20032836.5
20042536.5
20054336.5
20063936.5
20073836.5
20084436.5
20092936.5
20106051.2
20115251.2
20126351.2
20133451.2
20141851.2
20153651.2
20165251.2
20175051.2
20186851.2
20197951.2
20204942.1
20214842.1
20224542.1
20233242.1
20243642.1
20253542.1
20265042.1
First to last qualifying date each year at Annapolis US Naval Academy Aso For each year, a bar from the first to the last day at Annapolis US Naval Academy Aso meeting 30 C (86 F). 1946: 8 June 1946 to 10 September 19461947: 6 June 1947 to 4 September 19471948: 12 June 1948 to 20 September 19481949: 19 May 1949 to 27 August 19491950: 24 June 1950 to 1 September 19501951: 2 May 1951 to 6 October 19511952: 6 June 1952 to 14 September 19521953: 26 May 1953 to 4 September 19531954: 13 June 1954 to 4 October 19541955: 5 May 1955 to 20 September 19551956: 13 May 1956 to 17 September 19561957: 21 April 1957 to 15 September 19571958: 9 June 1958 to 17 September 19581959: 7 May 1959 to 28 September 19591960: 15 April 1960 to 4 September 19601961: 25 April 1961 to 25 September 19612002: 17 April 2002 to 4 September 20022003: 11 June 2003 to 30 August 20032004: 15 May 2004 to 28 August 20042005: 7 June 2005 to 23 September 20052006: 30 May 2006 to 29 August 20062007: 8 June 2007 to 9 October 20072008: 31 May 2008 to 14 September 20082009: 26 April 2009 to 26 August 20092010: 6 April 2010 to 25 September 20102011: 20 April 2011 to 21 August 20112012: 28 May 2012 to 8 September 20122013: 10 April 2013 to 11 September 20132014: 27 May 2014 to 11 September 20142015: 12 May 2015 to 9 September 20152016: 6 June 2016 to 14 September 20162017: 16 April 2017 to 9 October 20172018: 14 April 2018 to 4 October 20182019: 20 May 2019 to 2 October 20192020: 3 June 2020 to 4 September 20202021: 28 April 2021 to 14 September 20212022: 21 May 2022 to 4 September 20222023: 5 July 2023 to 8 September 20232024: 29 April 2024 to 28 August 20242025: 17 May 2025 to 6 September 20252026: 15 April 2026 to 14 October 20261946195219582004201020162022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Annapolis US Naval Academy Aso meeting 30 C (86 F).
First to last qualifying date each year at Annapolis US Naval Academy Aso
YearFirst dateLast date
19461946-06-081946-09-10
19471947-06-061947-09-04
19481948-06-121948-09-20
19491949-05-191949-08-27
19501950-06-241950-09-01
19511951-05-021951-10-06
19521952-06-061952-09-14
19531953-05-261953-09-04
19541954-06-131954-10-04
19551955-05-051955-09-20
19561956-05-131956-09-17
19571957-04-211957-09-15
19581958-06-091958-09-17
19591959-05-071959-09-28
19601960-04-151960-09-04
19611961-04-251961-09-25
20022002-04-172002-09-04
20032003-06-112003-08-30
20042004-05-152004-08-28
20052005-06-072005-09-23
20062006-05-302006-08-29
20072007-06-082007-10-09
20082008-05-312008-09-14
20092009-04-262009-08-26
20102010-04-062010-09-25
20112011-04-202011-08-21
20122012-05-282012-09-08
20132013-04-102013-09-11
20142014-05-272014-09-11
20152015-05-122015-09-09
20162016-06-062016-09-14
20172017-04-162017-10-09
20182018-04-142018-10-04
20192019-05-202019-10-02
20202020-06-032020-09-04
20212021-04-282021-09-14
20222022-05-212022-09-04
20232023-07-052023-09-08
20242024-04-292024-08-28
20252025-05-172025-09-06
20262026-04-152026-10-14

Every Fixed Threshold

Fixed thresholds at Annapolis US Naval Academy Aso
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4179201950
35 C (95 F): Days271220196
90 F (32.2 C): Days4146201920
100 F (37.8 C): Days5119531
0 C (32 F): Ice days (max3922195813
0 C (32 F): Frost days (min4188196047
-10 C (14 F): Days with min241119616
20 C (68 F): Tropical nights (min41120201989
25 C (77 F): Days with min362920197
10 mm (0.39 in): Days with 10 mm or more rain4154200318
25 mm (0.98 in): Days with 25 mm or more rain411820033
50 mm (1.97 in): Days with 50 mm or more rain34720031
100 mm (3.94 in): Days with 100 mm or more rain7119501
200 mm (7.87 in): Days with 200 mm or more rain1120101
10 cm (3.9 in): Days with 10 cm or more snowfall9419603
25 cm (9.8 in): Days with 25 cm or more snowfall2119571

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1946.

Download the Data

  • Data for Annapolis US Naval Academy Aso 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).