Morrisey Threshold Days by Year (USC00486450)

18 fixed thresholds counted per year at Morrisey (USC00486450): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Morrisey Thresholds

Morrisey: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1955 with 13.
Morrisey: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1951 with 181.
Morrisey: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1955 with 79.
Morrisey: nights with a minimum temperature at or below -20 C (-4 F) in 25 years, most in 1949 with 26.
18 fixed thresholds have at least one qualifying day at Morrisey.

Days at or above 30 C (86 F)

23 years with a qualifying day

Days per year at Morrisey with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 88 in 1953.

Days at or above 30 C (86 F) per year at Morrisey
Year	Days	Decade average
1949	67	67
1950	48	66.8
1951	38	66.8
1952	82	66.8
1953	88	66.8
1954	74	66.8
1955	83	66.8
1956	82	66.8
1957	43	66.8
1958	53	66.8
1959	77	66.8
1960	42	56.2
1961	79	56.2
1962	39	56.2
1966	72	56.2
1968	49	56.2
1970	74	57.4
1971	62	57.4
1972	50	57.4
1973	50	57.4
1975	56	57.4
1976	65	57.4
1977	45	57.4

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

First to last qualifying date each year at Morrisey
Year	First date	Last date
1949	1949-04-24	1949-10-05
1950	1950-06-05	1950-10-12
1951	1951-05-28	1951-09-10
1952	1952-04-26	1952-10-09
1953	1953-05-28	1953-10-18
1954	1954-05-20	1954-10-08
1955	1955-04-30	1955-10-09
1956	1956-05-17	1956-10-12
1957	1957-06-04	1957-10-01
1958	1958-05-21	1958-10-14
1959	1959-06-04	1959-09-14
1960	1960-05-12	1960-10-07
1961	1961-05-10	1961-09-17
1962	1962-04-20	1962-09-11
1966	1966-05-04	1966-09-24
1968	1968-06-03	1968-09-14
1970	1970-06-07	1970-10-04
1971	1971-06-16	1971-09-14
1972	1972-05-17	1972-09-18
1973	1973-06-07	1973-08-31
1975	1975-06-24	1975-10-11
1976	1976-05-14	1976-09-17
1977	1977-06-01	1977-09-14

Every Fixed Threshold

Fixed thresholds at Morrisey
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	23	88	1953	45
35 C (95 F): Days	23	39	1955	8
40 C (104 F): Days	8	11	1954	1
90 F (32.2 C): Days	23	63	1953	31
100 F (37.8 C): Days	21	19	1954	1
110 F (43.3 C): Days	1	1	1954	1
0 C (32 F): Ice days (max	23	52	1949	45
0 C (32 F): Frost days (min	25	181	1951	150
-10 C (14 F): Days with min	25	79	1955	51
-20 C (-4 F): Days with min	25	26	1949	14
-30 C (-22 F): Days with min	6	2	1951	1
20 C (68 F): Tropical nights (min	20	8	1957	3
25 C (77 F): Days with min	1	1	1949	1
10 mm (0.39 in): Days with 10 mm or more rain	28	13	1955	10
25 mm (0.98 in): Days with 25 mm or more rain	21	4	1952	4
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1952	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	10	1955	3
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1953	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

Data for Morrisey 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).

Morrisey Threshold Days by Year (USC00486450)

Key Facts for Morrisey Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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