Monticello Threshold Days by Year (CA008300447)

14 fixed thresholds counted per year at Monticello (CA008300447): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Monticello Thresholds

Monticello: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 1965 with 99.
Monticello: nights with a minimum temperature at or below 0 C (32 F) in 21 years, most in 1965 with 201.
Monticello: nights with a minimum temperature at or below -10 C (14 F) in 21 years, most in 1972 with 75.
Monticello: days with 10 cm (3.9 in) or more of snowfall in 21 years, most in 1977 with 15.
14 fixed thresholds have at least one qualifying day at Monticello.

Days at or above 30 C (86 F)

17 years with a qualifying day

Days per year at Monticello with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 1976.

Days at or above 30 C (86 F) per year at Monticello
Year	Days	Decade average
1962	1	1.3
1963	2	1.3
1965	2	1.3
1967	1	1.3
1968	1	1.3
1969	1	1.3
1970	4	2.7
1971	1	2.7
1972	3	2.7
1974	1	2.7
1975	4	2.7
1976	6	2.7
1977	3	2.7
1978	1	2.7
1979	1	2.7
1980	1	1
1981	1	1

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

First to last qualifying date each year at Monticello
Year	First date	Last date
1962	1962-06-16	1962-06-16
1963	1963-07-26	1963-07-27
1965	1965-08-08	1965-09-23
1967	1967-06-05	1967-06-05
1968	1968-07-09	1968-07-09
1969	1969-06-28	1969-06-28
1970	1970-07-26	1970-08-16
1971	1971-08-10	1971-08-10
1972	1972-05-29	1972-07-16
1974	1974-08-22	1974-08-22
1975	1975-06-24	1975-08-10
1976	1976-06-06	1976-08-22
1977	1977-06-29	1977-08-29
1978	1978-08-16	1978-08-16
1979	1979-07-10	1979-07-10
1980	1980-06-26	1980-06-26
1981	1981-07-03	1981-07-03

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	17	6	1976	1
90 F (32.2 C): Days	3	1	1963	1
0 C (32 F): Ice days (max	21	99	1965	53
0 C (32 F): Frost days (min	21	201	1965	146
-10 C (14 F): Days with min	21	75	1972	36
-20 C (-4 F): Days with min	20	13	1961	4
-30 C (-22 F): Days with min	2	1	1973	1
20 C (68 F): Tropical nights (min	16	7	1973	5
10 mm (0.39 in): Days with 10 mm or more rain	20	45	1977	45
25 mm (0.98 in): Days with 25 mm or more rain	20	12	1979	9
50 mm (1.97 in): Days with 50 mm or more rain	8	2	1967	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1971	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	15	1977	8
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1961	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.

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 (CA008300447)

Key Facts for Monticello Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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