Monticello Threshold Days by Year (USC00115791)

14 fixed thresholds counted per year at Monticello (USC00115791): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Monticello Thresholds

Monticello: days with 10 mm (0.39 in) or more of precipitation in 20 years, most in 1945 with 41.
Monticello: days with 25 mm (0.98 in) or more of precipitation in 20 years, most in 1946 with 13.
Monticello: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1943 with 4.
Monticello: days with 10 cm (3.9 in) or more of snowfall in 10 years, most in 1960 with 6.
14 fixed thresholds have at least one qualifying day at Monticello.

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

20 years with a qualifying day

Days per year at Monticello with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 41 in 1945.

Days with 10 mm (0.39 in) or more of precipitation per year at Monticello
Year	Days	Decade average
1900	33	33
1943	30	33.4
1944	25	33.4
1945	41	33.4
1946	36	33.4
1947	35	33.4
1950	34	28.6
1952	35	28.6
1953	22	28.6
1954	23	28.6
1955	28	28.6
1956	23	28.6
1957	33	28.6
1958	25	28.6
1959	34	28.6
1960	32	28.6
1961	33	28.6
1962	31	28.6
1963	22	28.6
1964	25	28.6

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

First to last qualifying date each year at Monticello
Year	First date	Last date
1900	1900-02-04	1900-12-22
1943	1943-02-06	1943-11-08
1944	1944-02-10	1944-12-10
1945	1945-02-21	1945-12-30
1946	1946-01-09	1946-12-29
1947	1947-01-02	1947-12-07
1950	1950-01-03	1950-12-06
1952	1952-01-01	1952-12-20
1953	1953-01-08	1953-12-03
1954	1954-01-20	1954-12-29
1955	1955-01-05	1955-11-02
1956	1956-02-24	1956-12-08
1957	1957-01-22	1957-12-25
1958	1958-01-21	1958-11-25
1959	1959-01-01	1959-12-27
1960	1960-01-12	1960-12-20
1961	1961-02-17	1961-12-12
1962	1962-01-06	1962-11-16
1963	1963-03-04	1963-11-22
1964	1964-01-12	1964-11-28

Every Fixed Threshold

Fixed thresholds at Monticello
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	1	80	1900	80
35 C (95 F): Days	1	10	1900	10
90 F (32.2 C): Days	1	48	1900	48
0 C (32 F): Ice days (max	1	17	1900	17
0 C (32 F): Frost days (min	1	118	1900	118
-10 C (14 F): Days with min	1	27	1900	27
-20 C (-4 F): Days with min	1	3	1900	3
20 C (68 F): Tropical nights (min	1	22	1900	22
25 C (77 F): Days with min	1	2	1900	2
10 mm (0.39 in): Days with 10 mm or more rain	20	41	1945	25
25 mm (0.98 in): Days with 25 mm or more rain	20	13	1946	8
50 mm (1.97 in): Days with 50 mm or more rain	16	4	1943	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1955	1
10 cm (3.9 in): Days with 10 cm or more snowfall	10	6	1960	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Monticello 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).

Monticello Threshold Days by Year (USC00115791)

Key Facts for Monticello Thresholds

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

Every Fixed Threshold

Download the Data

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