Emerson Threshold Days by Year (CA005020880)

17 fixed thresholds counted per year at Emerson (CA005020880): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Emerson Thresholds

Emerson: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1965 with 24.
Emerson: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 1949 with 35.
Emerson: days with a maximum temperature at or below 0 C (32 F) in 36 years, most in 1955 with 138.
Emerson: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1944 with 7.
17 fixed thresholds have at least one qualifying day at Emerson.

Days at or above 30 C (86 F)

36 years with a qualifying day

Days per year at Emerson with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 35 in 1949.

Days at or above 30 C (86 F) per year at Emerson
Year	Days	Decade average
1894	32	13.8
1895	3	13.8
1896	10	13.8
1898	10	13.8
1943	24	26
1944	21	26
1945	19	26
1946	26	26
1947	29	26
1948	28	26
1949	35	26
1950	14	16.2
1951	11	16.2
1952	30	16.2
1953	22	16.2
1954	10	16.2
1955	27	16.2
1956	8	16.2
1957	11	16.2
1958	11	16.2
1959	18	16.2
1960	24	15.3
1962	9	15.3
1963	30	15.3
1964	20	15.3
1965	9	15.3
1966	15	15.3
1967	12	15.3
1968	3	15.3
1971	13	23
1972	24	23
1976	34	23
1978	21	23
1980	28	11.7
1981	3	11.7
1982	4	11.7

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

First to last qualifying date each year at Emerson
Year	First date	Last date
1894	1894-06-03	1894-09-06
1895	1895-07-06	1895-09-03
1896	1896-05-07	1896-08-29
1898	1898-05-24	1898-09-28
1943	1943-05-20	1943-10-08
1944	1944-05-23	1944-08-19
1945	1945-06-21	1945-09-06
1946	1946-05-26	1946-09-16
1947	1947-04-28	1947-09-05
1948	1948-05-19	1948-09-11
1949	1949-04-28	1949-08-25
1950	1950-06-06	1950-09-07
1951	1951-05-23	1951-08-04
1952	1952-04-26	1952-09-27
1953	1953-05-06	1953-08-31
1954	1954-06-23	1954-08-31
1955	1955-05-20	1955-09-05
1956	1956-06-05	1956-08-28
1957	1957-04-30	1957-08-10
1958	1958-05-12	1958-08-18
1959	1959-06-03	1959-08-28
1960	1960-05-13	1960-09-05
1962	1962-06-26	1962-09-02
1963	1963-05-30	1963-09-10
1964	1964-05-21	1964-08-05
1965	1965-07-21	1965-08-23
1966	1966-05-21	1966-09-12
1967	1967-05-24	1967-09-06
1968	1968-06-03	1968-07-10
1971	1971-06-03	1971-09-04
1972	1972-05-16	1972-08-30
1976	1976-05-09	1976-09-30
1978	1978-05-24	1978-09-10
1980	1980-04-20	1980-09-07
1981	1981-08-11	1981-08-30
1982	1982-07-31	1982-09-10

Every Fixed Threshold

Fixed thresholds at Emerson
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	36	35	1949	4
35 C (95 F): Days	19	4	1952	3
90 F (32.2 C): Days	34	21	1952	11
100 F (37.8 C): Days	2	2	1949	1
0 C (32 F): Ice days (max	36	138	1955	115
0 C (32 F): Frost days (min	33	226	1945	176
-10 C (14 F): Days with min	33	139	1950	104
-20 C (-4 F): Days with min	33	90	1950	55
-30 C (-22 F): Days with min	33	31	1896	20
-40 C (-40 F): Days with min	9	4	1895	1
20 C (68 F): Tropical nights (min	22	5	1947	1
10 mm (0.39 in): Days with 10 mm or more rain	38	24	1965	12
25 mm (0.98 in): Days with 25 mm or more rain	36	7	1944	5
50 mm (1.97 in): Days with 50 mm or more rain	14	3	1957	3
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1957	1
10 cm (3.9 in): Days with 10 cm or more snowfall	30	7	1965	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1943	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Emerson 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).

Emerson Threshold Days by Year (CA005020880)

Key Facts for Emerson Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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