Bolivar Dam Threshold Days by Year (USC00330823)

6 fixed thresholds counted per year at Bolivar Dam (USC00330823): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bolivar Dam Thresholds

Bolivar Dam: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1975 with 41.
Bolivar Dam: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1978 with 12.
Bolivar Dam: days with 10 cm (3.9 in) or more of snowfall in 27 years, most in 1951 with 6.
Bolivar Dam: days with 50 mm (1.97 in) or more of precipitation in 23 years, most in 1957 with 2.
6 fixed thresholds have at least one qualifying day at Bolivar Dam.

Days with 10 mm (0.39 in) or more of precipitation

37 years with a qualifying day

Days per year at Bolivar Dam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 41 in 1975.

Days with 10 mm (0.39 in) or more of precipitation per year at Bolivar Dam
Year	Days	Decade average
1950	32	31.1
1951	37	31.1
1952	30	31.1
1953	29	31.1
1954	22	31.1
1955	27	31.1
1956	39	31.1
1957	29	31.1
1958	32	31.1
1959	34	31.1
1960	22	27.2
1961	35	27.2
1962	24	27.2
1963	22	27.2
1964	29	27.2
1965	22	27.2
1966	29	27.2
1967	38	27.2
1968	26	27.2
1969	25	27.2
1970	33	34.6
1971	24	34.6
1972	35	34.6
1973	35	34.6
1974	40	34.6
1975	41	34.6
1976	36	34.6
1977	33	34.6
1978	34	34.6
1979	35	34.6
1980	38	34.9
1981	35	34.9
1982	34	34.9
1983	39	34.9
1984	35	34.9
1985	31	34.9
1986	32	34.9

For each year, a bar from the first to the last day at Bolivar Dam meeting 10 mm (0.39 in).

First to last qualifying date each year at Bolivar Dam
Year	First date	Last date
1950	1950-01-03	1950-11-25
1951	1951-01-04	1951-12-26
1952	1952-01-17	1952-12-10
1953	1953-01-09	1953-12-10
1954	1954-01-21	1954-12-30
1955	1955-01-06	1955-11-16
1956	1956-01-29	1956-12-09
1957	1957-01-23	1957-12-26
1958	1958-01-14	1958-11-29
1959	1959-01-02	1959-12-13
1960	1960-01-03	1960-12-21
1961	1961-01-01	1961-12-11
1962	1962-01-27	1962-12-30
1963	1963-03-02	1963-12-09
1964	1964-02-19	1964-12-26
1965	1965-01-02	1965-11-13
1966	1966-01-01	1966-12-11
1967	1967-01-27	1967-12-22
1968	1968-01-14	1968-12-28
1969	1969-01-18	1969-12-11
1970	1970-01-29	1970-12-22
1971	1971-01-04	1971-12-31
1972	1972-01-14	1972-12-16
1973	1973-01-04	1973-12-21
1974	1974-01-09	1974-12-24
1975	1975-01-01	1975-12-26
1976	1976-01-08	1976-12-07
1977	1977-03-13	1977-12-14
1978	1978-01-09	1978-12-09
1979	1979-01-01	1979-12-25
1980	1980-01-12	1980-11-27
1981	1981-02-02	1981-12-23
1982	1982-01-23	1982-12-19
1983	1983-01-11	1983-12-29
1984	1984-02-14	1984-12-30
1985	1985-02-12	1985-12-12
1986	1986-01-20	1986-12-25

Every Fixed Threshold

Fixed thresholds at Bolivar Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	37	41	1975	32
25 mm (0.98 in): Days with 25 mm or more rain	37	12	1978	6
50 mm (1.97 in): Days with 50 mm or more rain	23	2	1957	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1969	1
10 cm (3.9 in): Days with 10 cm or more snowfall	27	6	1951	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1950	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

Download the Data

Data for Bolivar 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).

Bolivar Dam Threshold Days by Year (USC00330823)

Key Facts for Bolivar Dam Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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