Ball Mtn Lake Threshold Days by Year (USC00430277)

16 fixed thresholds counted per year at Ball Mtn Lake (USC00430277): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ball Mtn Lake Thresholds

Ball Mtn Lake: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1983 with 56.
Ball Mtn Lake: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1983 with 20.
Ball Mtn Lake: days with 10 cm (3.9 in) or more of snowfall in 23 years, most in 1978 with 12.
Ball Mtn Lake: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 1978 with 78.
16 fixed thresholds have at least one qualifying day at Ball Mtn Lake.

Days at or above 30 C (86 F)

20 years with a qualifying day

Days per year at Ball Mtn Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 24 in 1988.

Days at or above 30 C (86 F) per year at Ball Mtn Lake
Year	Days	Decade average
1970	19	10.6
1971	12	10.6
1972	7	10.6
1973	14	10.6
1974	7	10.6
1975	13	10.6
1976	9	10.6
1977	10	10.6
1978	7	10.6
1979	8	10.6
1980	10	8.8
1981	3	8.8
1982	5	8.8
1983	5	8.8
1984	9	8.8
1986	3	8.8
1987	14	8.8
1988	24	8.8
1989	6	8.8
1990	5	5

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

First to last qualifying date each year at Ball Mtn Lake
Year	First date	Last date
1970	1970-05-02	1970-09-23
1971	1971-05-20	1971-08-20
1972	1972-06-16	1972-08-26
1973	1973-06-12	1973-09-05
1974	1974-05-16	1974-07-15
1975	1975-05-21	1975-08-04
1976	1976-04-19	1976-08-23
1977	1977-05-18	1977-08-30
1978	1978-05-29	1978-07-24
1979	1979-05-10	1979-08-06
1980	1980-05-24	1980-09-03
1981	1981-06-17	1981-07-10
1982	1982-07-08	1982-07-20
1983	1983-06-14	1983-08-21
1984	1984-06-08	1984-08-09
1986	1986-05-20	1986-07-25
1987	1987-05-30	1987-08-18
1988	1988-06-14	1988-08-16
1989	1989-06-28	1989-09-11
1990	1990-04-28	1990-08-05

Every Fixed Threshold

Fixed thresholds at Ball Mtn Lake
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	20	24	1988	5
35 C (95 F): Days	1	2	1988	2
90 F (32.2 C): Days	13	9	1988	1
0 C (32 F): Ice days (max	21	78	1978	34
0 C (32 F): Frost days (min	20	211	1978	186
-10 C (14 F): Days with min	20	96	1970	87
-20 C (-4 F): Days with min	20	28	1970	23
-30 C (-22 F): Days with min	8	6	1971	2
20 C (68 F): Tropical nights (min	1	1	1971	1
10 mm (0.39 in): Days with 10 mm or more rain	23	56	1983	42
25 mm (0.98 in): Days with 25 mm or more rain	23	20	1983	15
50 mm (1.97 in): Days with 50 mm or more rain	18	4	1986	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1973	1
10 cm (3.9 in): Days with 10 cm or more snowfall	23	12	1978	5
25 cm (9.8 in): Days with 25 cm or more snowfall	18	3	1978	2
50 cm (19.7 in): Days with 50 cm or more snowfall	4	1	1982	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

Data for Ball Mtn Lake 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).

Ball Mtn Lake Threshold Days by Year (USC00430277)

Key Facts for Ball Mtn Lake Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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