Maryfield Threshold Days by Year (CA004015045)

15 fixed thresholds counted per year at Maryfield (CA004015045): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Maryfield Thresholds

Maryfield: days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1983 with 25.
Maryfield: days with a maximum temperature at or above 90 F (32.2 C) in 13 years, most in 1983 with 10.
Maryfield: days with a maximum temperature at or below 0 C (32 F) in 13 years, most in 1972 with 136.
Maryfield: nights with a minimum temperature at or below 0 C (32 F) in 13 years, most in 1972 with 208.
15 fixed thresholds have at least one qualifying day at Maryfield.

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Maryfield with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 1983.

Days at or above 30 C (86 F) per year at Maryfield
Year	Days	Decade average
1971	10	10.2
1972	9	10.2
1973	10	10.2
1974	8	10.2
1975	13	10.2
1976	8	10.2
1977	9	10.2
1978	12	10.2
1979	13	10.2
1980	22	18.3
1981	16	18.3
1982	10	18.3
1983	25	18.3

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

First to last qualifying date each year at Maryfield
Year	First date	Last date
1971	1971-08-05	1971-08-28
1972	1972-05-16	1972-08-29
1973	1973-07-05	1973-08-30
1974	1974-07-07	1974-08-11
1975	1975-06-25	1975-08-06
1976	1976-07-08	1976-09-06
1977	1977-05-12	1977-07-23
1978	1978-06-14	1978-09-10
1979	1979-06-12	1979-09-16
1980	1980-04-20	1980-09-07
1981	1981-07-01	1981-09-18
1982	1982-07-02	1982-09-10
1983	1983-06-10	1983-09-01

Every Fixed Threshold

Fixed thresholds at Maryfield
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	25	1983	25
35 C (95 F): Days	8	4	1983	4
90 F (32.2 C): Days	13	10	1983	10
100 F (37.8 C): Days	2	1	1979	1
0 C (32 F): Ice days (max	13	136	1972	124
0 C (32 F): Frost days (min	13	208	1972	202
-10 C (14 F): Days with min	13	124	1978	98
-20 C (-4 F): Days with min	13	80	1978	43
-30 C (-22 F): Days with min	13	26	1972	12
-40 C (-40 F): Days with min	4	1	1972	1
20 C (68 F): Tropical nights (min	4	3	1975	1
10 mm (0.39 in): Days with 10 mm or more rain	13	21	1975	10
25 mm (0.98 in): Days with 25 mm or more rain	11	8	1975	1
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1971	1
10 cm (3.9 in): Days with 10 cm or more snowfall	12	5	1974	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

Data for Maryfield 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Maryfield Threshold Days by Year (CA004015045)

Key Facts for Maryfield Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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