Norfork Dam Threshold Days by Year (USC00035228)

15 fixed thresholds counted per year at Norfork Dam (USC00035228): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norfork Dam Thresholds

Norfork Dam: days with 10 mm (0.39 in) or more of precipitation in 6 years, most in 1950 with 38.
Norfork Dam: days with 25 mm (0.98 in) or more of precipitation in 6 years, most in 1951 with 16.
Norfork Dam: days with a maximum temperature at or above 30 C (86 F) in 5 years, most in 1952 with 110.
Norfork Dam: days with a maximum temperature at or above 35 C (95 F) in 5 years, most in 1952 with 49.
15 fixed thresholds have at least one qualifying day at Norfork Dam.

Days at or above 30 C (86 F)

5 years with a qualifying day

Days per year at Norfork Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 110 in 1952.

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

First to last qualifying date each year at Norfork Dam
Year	First date	Last date
1948	1948-04-07	1948-09-23
1949	1949-04-23	1949-10-20
1950	1950-01-25	1950-11-02
1951	1951-04-15	1951-10-06
1952	1952-03-21	1952-10-28

Every Fixed Threshold

Fixed thresholds at Norfork Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	5	110	1952	110
35 C (95 F): Days	5	49	1952	49
40 C (104 F): Days	1	3	1952	3
90 F (32.2 C): Days	5	83	1952	83
100 F (37.8 C): Days	2	21	1952	21
0 C (32 F): Ice days (max	5	15	1948	3
0 C (32 F): Frost days (min	5	113	1950	97
-10 C (14 F): Days with min	5	18	1948	5
-20 C (-4 F): Days with min	2	2	1951	2
20 C (68 F): Tropical nights (min	5	44	1949	32
25 C (77 F): Days with min	4	1	1948	1
10 mm (0.39 in): Days with 10 mm or more rain	6	38	1950	12
25 mm (0.98 in): Days with 25 mm or more rain	6	16	1951	4
50 mm (1.97 in): Days with 50 mm or more rain	5	6	1949	3
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1948	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

Data for Norfork 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Norfork Dam Threshold Days by Year (USC00035228)

Key Facts for Norfork Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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