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

Hartwell Dam Threshold Days by Year (USC00094138)

13 fixed thresholds counted per year at Hartwell Dam (USC00094138): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hartwell Dam Thresholds

  • Hartwell Dam: days with 10 mm (0.39 in) or more of precipitation in 9 years, most in 2013 with 53.
  • Hartwell Dam: days with 25 mm (0.98 in) or more of precipitation in 9 years, most in 2015 with 21.
  • Hartwell Dam: days with 50 mm (1.97 in) or more of precipitation in 9 years, most in 2015 with 5.
  • Hartwell Dam: nights with a minimum temperature at or below 0 C (32 F) in 8 years, most in 2014 with 69.
  • 13 fixed thresholds have at least one qualifying day at Hartwell Dam.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Hartwell Dam Days per year at Hartwell Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 127 in 2016. 0501001502013: 692014: 962015: 912016: 1272017: 962018: 1122019: 1172013201420152016201720182019
Days per year at Hartwell Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 127 in 2016.
Days at or above 30 C (86 F) per year at Hartwell Dam
YearDaysDecade average
201369101.1
201496101.1
201591101.1
2016127101.1
201796101.1
2018112101.1
2019117101.1
First to last qualifying date each year at Hartwell Dam For each year, a bar from the first to the last day at Hartwell Dam meeting 30 C (86 F). 2013: 16 May 2013 to 6 October 20132014: 5 May 2014 to 22 September 20142015: 10 April 2015 to 21 September 20152016: 28 April 2016 to 21 October 20162017: 29 April 2017 to 12 October 20172018: 11 May 2018 to 8 October 20182019: 18 May 2019 to 5 October 20192013201420152016201720182019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hartwell Dam meeting 30 C (86 F).
First to last qualifying date each year at Hartwell Dam
YearFirst dateLast date
20132013-05-162013-10-06
20142014-05-052014-09-22
20152015-04-102015-09-21
20162016-04-282016-10-21
20172017-04-292017-10-12
20182018-05-112018-10-08
20192019-05-182019-10-05

Every Fixed Threshold

Fixed thresholds at Hartwell Dam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days71272016117
35 C (95 F): Days633201620
90 F (32.2 C): Days794201684
100 F (37.8 C): Days1220162
0 C (32 F): Ice days (max3320141
0 C (32 F): Frost days (min869201440
-10 C (14 F): Days with min3420142
20 C (68 F): Tropical nights (min8124201884
25 C (77 F): Days with min2120161
10 mm (0.39 in): Days with 10 mm or more rain953201337
25 mm (0.98 in): Days with 25 mm or more rain92120159
50 mm (1.97 in): Days with 50 mm or more rain9520151
100 mm (3.94 in): Days with 100 mm or more rain2120151

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2013.

Download the Data

  • Data for Hartwell Dam 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).