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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Copper Hill Threshold Days by Year (USC00441999)

14 fixed thresholds counted per year at Copper Hill (USC00441999): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Copper Hill Thresholds

  • Copper Hill: days with 10 mm (0.39 in) or more of precipitation in 77 years, most in 2003 with 59.
  • Copper Hill: days with 25 mm (0.98 in) or more of precipitation in 77 years, most in 2009 with 23.
  • Copper Hill: days with 50 mm (1.97 in) or more of precipitation in 71 years, most in 1949 with 8.
  • Copper Hill: days with 10 cm (3.9 in) or more of snowfall in 60 years, most in 1962 with 10.
  • 14 fixed thresholds have at least one qualifying day at Copper Hill.
16 years with a qualifying day
Days at or above 30 C (86 F) per year at Copper Hill Days per year at Copper Hill with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 2011. 051015202011: 162012: 82013: 12014: 12015: 82016: 112017: 112018: 22019: 62020: 52021: 62022: 32023: 32024: 92025: 82026: 1220112013201520172019202120232025
Days per year at Copper Hill with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 2011.
Days at or above 30 C (86 F) per year at Copper Hill
YearDaysDecade average
2011167.1
201287.1
201317.1
201417.1
201587.1
2016117.1
2017117.1
201827.1
201967.1
202056.6
202166.6
202236.6
202336.6
202496.6
202586.6
2026126.6
First to last qualifying date each year at Copper Hill For each year, a bar from the first to the last day at Copper Hill meeting 30 C (86 F). 2011: 31 May 2011 to 5 August 20112012: 29 June 2012 to 19 July 20122013: 18 July 2013 to 18 July 20132014: 19 June 2014 to 19 June 20142015: 16 June 2015 to 3 September 20152016: 12 June 2016 to 27 August 20162017: 12 July 2017 to 25 July 20172018: 19 June 2018 to 22 June 20182019: 20 July 2019 to 4 October 20192020: 11 July 2020 to 2 August 20202021: 11 August 2021 to 28 August 20212022: 18 June 2022 to 7 July 20222023: 28 July 2023 to 6 September 20232024: 24 June 2024 to 18 July 20242025: 23 June 2025 to 28 July 20252026: 20 May 2026 to 5 September 202620112013201520172019202120232025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Copper Hill meeting 30 C (86 F).
First to last qualifying date each year at Copper Hill
YearFirst dateLast date
20112011-05-312011-08-05
20122012-06-292012-07-19
20132013-07-182013-07-18
20142014-06-192014-06-19
20152015-06-162015-09-03
20162016-06-122016-08-27
20172017-07-122017-07-25
20182018-06-192018-06-22
20192019-07-202019-10-04
20202020-07-112020-08-02
20212021-08-112021-08-28
20222022-06-182022-07-07
20232023-07-282023-09-06
20242024-06-242024-07-18
20252025-06-232025-07-28
20262026-05-202026-09-05

Every Fixed Threshold

Fixed thresholds at Copper Hill
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1616201112
90 F (32.2 C): Days6220113
0 C (32 F): Ice days (max1629201421
0 C (32 F): Frost days (min16132201364
-10 C (14 F): Days with min1632201418
-20 C (-4 F): Days with min6420142
20 C (68 F): Tropical nights (min9720167
10 mm (0.39 in): Days with 10 mm or more rain7759200330
25 mm (0.98 in): Days with 25 mm or more rain772320098
50 mm (1.97 in): Days with 50 mm or more rain71819492
100 mm (3.94 in): Days with 100 mm or more rain21219491
200 mm (7.87 in): Days with 200 mm or more rain1119721
10 cm (3.9 in): Days with 10 cm or more snowfall601019621
25 cm (9.8 in): Days with 25 cm or more snowfall17319601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2011.

Download the Data

  • Data for Copper Hill 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).