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

Achilles Threshold Days by Year (USC00140020)

18 fixed thresholds counted per year at Achilles (USC00140020): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Achilles Thresholds

  • Achilles: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1897 with 21.
  • Achilles: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1897 with 9.
  • Achilles: days with 50 mm (1.97 in) or more of precipitation in 14 years, most in 1902 with 3.
  • Achilles: days with 10 cm (3.9 in) or more of snowfall in 7 years, most in 1958 with 4.
  • 18 fixed thresholds have at least one qualifying day at Achilles.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at Achilles Days per year at Achilles with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 82 in 1901. 02550751001901: 821902: 651903: 621904: 631901190219031904
Days per year at Achilles with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 82 in 1901.
Days at or above 30 C (86 F) per year at Achilles
YearDaysDecade average
19018268
19026568
19036268
19046368
First to last qualifying date each year at Achilles For each year, a bar from the first to the last day at Achilles meeting 30 C (86 F). 1901: 25 April 1901 to 29 October 19011902: 19 April 1902 to 21 October 19021903: 27 April 1903 to 19 October 19031904: 24 May 1904 to 7 October 19041901190219031904JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Achilles meeting 30 C (86 F).
First to last qualifying date each year at Achilles
YearFirst dateLast date
19011901-04-251901-10-29
19021902-04-191902-10-21
19031903-04-271903-10-19
19041904-05-241904-10-07

Every Fixed Threshold

Fixed thresholds at Achilles
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days482190163
35 C (95 F): Days444190117
40 C (104 F): Days2619012
90 F (32.2 C): Days467190141
100 F (37.8 C): Days43019013
110 F (43.3 C): Days1119021
0 C (32 F): Ice days (max424190116
0 C (32 F): Frost days (min41751904175
-10 C (14 F): Days with min460190360
-20 C (-4 F): Days with min41419014
20 C (68 F): Tropical nights (min4519011
25 C (77 F): Days with min1119011
10 mm (0.39 in): Days with 10 mm or more rain2321189714
25 mm (0.98 in): Days with 25 mm or more rain23918975
50 mm (1.97 in): Days with 50 mm or more rain14319021
100 mm (3.94 in): Days with 100 mm or more rain2118981
10 cm (3.9 in): Days with 10 cm or more snowfall7419581
25 cm (9.8 in): Days with 25 cm or more snowfall1119521

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

  • Data for Achilles 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).