Middlesex Threshold Days by Year (USC00435132)

15 fixed thresholds counted per year at Middlesex (USC00435132): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Middlesex Thresholds

Middlesex: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1949 with 39.
Middlesex: days with a maximum temperature at or above 90 F (32.2 C) in 29 years, most in 1949 with 21.
Middlesex: days with a maximum temperature at or below 0 C (32 F) in 29 years, most in 1940 with 83.
Middlesex: nights with a minimum temperature at or below 0 C (32 F) in 28 years, most in 1956 with 196.
15 fixed thresholds have at least one qualifying day at Middlesex.

Days at or above 30 C (86 F)

29 years with a qualifying day

Days per year at Middlesex with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 39 in 1949.

Days at or above 30 C (86 F) per year at Middlesex
Year	Days	Decade average
1937	25	25
1938	22	25
1939	28	25
1940	14	21.3
1942	14	21.3
1943	16	21.3
1944	30	21.3
1945	20	21.3
1946	17	21.3
1948	20	21.3
1949	39	21.3
1950	13	19.7
1952	27	19.7
1953	35	19.7
1954	7	19.7
1955	34	19.7
1956	6	19.7
1957	14	19.7
1958	8	19.7
1959	33	19.7
1960	19	17.1
1961	17	17.1
1962	16	17.1
1963	19	17.1
1964	18	17.1
1965	19	17.1
1966	20	17.1
1967	13	17.1
1968	13	17.1

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

First to last qualifying date each year at Middlesex
Year	First date	Last date
1937	1937-06-01	1937-09-25
1938	1938-04-28	1938-08-21
1939	1939-06-10	1939-09-17
1940	1940-06-06	1940-08-19
1942	1942-06-11	1942-09-17
1943	1943-05-23	1943-09-08
1944	1944-05-05	1944-08-18
1945	1945-06-15	1945-09-09
1946	1946-05-26	1946-09-21
1948	1948-06-04	1948-09-14
1949	1949-06-04	1949-10-12
1950	1950-06-08	1950-08-28
1952	1952-06-18	1952-09-12
1953	1953-05-11	1953-09-06
1954	1954-06-02	1954-08-26
1955	1955-05-05	1955-09-20
1956	1956-06-13	1956-08-19
1957	1957-06-12	1957-09-23
1958	1958-07-02	1958-09-01
1959	1959-05-28	1959-09-10
1960	1960-05-28	1960-09-10
1961	1961-05-15	1961-09-25
1962	1962-04-28	1962-09-01
1963	1963-06-02	1963-10-08
1964	1964-05-08	1964-08-31
1965	1965-05-27	1965-09-24
1966	1966-05-25	1966-08-31
1967	1967-06-04	1967-08-18
1968	1968-06-07	1968-08-26

Every Fixed Threshold

Fixed thresholds at Middlesex
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	29	39	1949	13
35 C (95 F): Days	7	5	1944	1
90 F (32.2 C): Days	29	21	1949	7
0 C (32 F): Ice days (max	29	83	1940	78
0 C (32 F): Frost days (min	28	196	1956	165
-10 C (14 F): Days with min	28	95	1943	82
-20 C (-4 F): Days with min	28	46	1940	40
-30 C (-22 F): Days with min	21	8	1943	8
-40 C (-40 F): Days with min	1	2	1943	2
20 C (68 F): Tropical nights (min	8	4	1948	2
10 mm (0.39 in): Days with 10 mm or more rain	25	41	1945	31
25 mm (0.98 in): Days with 25 mm or more rain	25	9	1945	6
50 mm (1.97 in): Days with 50 mm or more rain	10	2	1945	1
10 cm (3.9 in): Days with 10 cm or more snowfall	23	11	1956	7
25 cm (9.8 in): Days with 25 cm or more snowfall	12	3	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 1937.

Download the Data

Data for Middlesex 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).

Middlesex Threshold Days by Year (USC00435132)

Key Facts for Middlesex Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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