Old Hickory Dam Threshold Days by Year (USC00406803)

16 fixed thresholds counted per year at Old Hickory Dam (USC00406803): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Old Hickory Dam Thresholds

Old Hickory Dam: days with 10 mm (0.39 in) or more of precipitation in 64 years, most in 1957 with 54.
Old Hickory Dam: days with 25 mm (0.98 in) or more of precipitation in 64 years, most in 1979 with 22.
Old Hickory Dam: days with 50 mm (1.97 in) or more of precipitation in 58 years, most in 2013 with 7.
Old Hickory Dam: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 2016 with 119.
16 fixed thresholds have at least one qualifying day at Old Hickory Dam.

Days at or above 30 C (86 F)

12 years with a qualifying day

Days per year at Old Hickory Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 119 in 2016.

Days at or above 30 C (86 F) per year at Old Hickory Dam
Year	Days	Decade average
2011	96	96.9
2012	92	96.9
2013	80	96.9
2014	91	96.9
2015	77	96.9
2016	119	96.9
2017	87	96.9
2018	114	96.9
2019	116	96.9
2020	83	86.7
2021	77	86.7
2026	100	86.7

For each year, a bar from the first to the last day at Old Hickory Dam meeting 30 C (86 F).

First to last qualifying date each year at Old Hickory Dam
Year	First date	Last date
2011	2011-04-10	2011-09-15
2012	2012-04-02	2012-09-13
2013	2013-04-18	2013-10-06
2014	2014-05-05	2014-10-03
2015	2015-05-08	2015-10-08
2016	2016-03-16	2016-11-02
2017	2017-04-15	2017-10-15
2018	2018-05-03	2018-10-08
2019	2019-05-01	2019-10-06
2020	2020-05-17	2020-09-13
2021	2021-05-23	2021-10-10
2026	2026-03-23	2026-10-15

Every Fixed Threshold

Fixed thresholds at Old Hickory Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	12	119	2016	100
35 C (95 F): Days	12	25	2011	23
40 C (104 F): Days	1	4	2012	4
90 F (32.2 C): Days	12	83	2016	65
100 F (37.8 C): Days	3	6	2012	1
0 C (32 F): Ice days (max	12	16	2014	7
0 C (32 F): Frost days (min	12	112	2014	41
-10 C (14 F): Days with min	9	14	2014	7
20 C (68 F): Tropical nights (min	12	80	2018	81
25 C (77 F): Days with min	4	1	2011	2
10 mm (0.39 in): Days with 10 mm or more rain	64	54	1957	26
25 mm (0.98 in): Days with 25 mm or more rain	64	22	1979	8
50 mm (1.97 in): Days with 50 mm or more rain	58	7	2013	2
100 mm (3.94 in): Days with 100 mm or more rain	9	2	1978	2
10 cm (3.9 in): Days with 10 cm or more snowfall	6	2	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1964	1

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 Old Hickory 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Old Hickory Dam Threshold Days by Year (USC00406803)

Key Facts for Old Hickory Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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