Eureka Weather Records (USC00422625)

Record envelope, standing records and threshold days for Eureka (USC00422625), Utah, United States, with 55 years of record.

Key Facts for Eureka

Eureka (USC00422625) is a weather station in Utah, United States at 39.95 latitude and -112.12 longitude, 1,975 m (6,480 ft) above sea level.
The station reports from 1930 to 1984, 55 years of record.
1,464 records set at Eureka still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Eureka set a daily record precipitation of 14.5 mm (0.6 in) on 20 July 1984.

About the Station

Location: Utah, United States, 39.95 latitude, -112.12 longitude.
Elevation: 1,975 m (6,480 ft).
Period of record: 1930 to 1984, 55 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Eureka. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Eureka, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	12.8 C (55.0 F)	-28.9 C (-20.0 F)	n/a	n/a
Feb	18.3 C (64.9 F)	-25.0 C (-13.0 F)	n/a	n/a
Mar	22.2 C (72.0 F)	-23.3 C (-9.9 F)	n/a	n/a
Apr	26.1 C (79.0 F)	-10.6 C (12.9 F)	n/a	n/a
May	30.6 C (87.1 F)	-11.7 C (10.9 F)	n/a	n/a
Jun	35.0 C (95.0 F)	-2.8 C (27.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	3.3 C (37.9 F)	n/a	n/a
Aug	35.0 C (95.0 F)	0.0 C (32.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	-6.1 C (21.0 F)	n/a	n/a
Oct	27.2 C (81.0 F)	-12.8 C (9.0 F)	n/a	n/a
Nov	21.1 C (70.0 F)	-18.9 C (-2.0 F)	n/a	n/a
Dec	15.0 C (59.0 F)	-25.6 C (-14.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Eureka still stand. 1964 holds the most, with 111.

Standing records at Eureka by the year they were set
Year set	Standing records
1963	3
1964	111
1965	88
1966	105
1967	70
1968	84
1969	81
1970	78
1971	76
1972	93
1973	66
1974	68
1975	87
1976	63
1977	71
1978	51
1979	74
1980	13
1981	16
1982	97
1983	50
1984	19

Wettest Day of Each Month

Oct: 66.0 mm (2.6 in)

The wettest day on record for each calendar month at Eureka. The most was 66.0 mm (2.6 in) on 28 October 1946.

Record daily precipitation for each month at Eureka
Month	Record daily precipitation (mm)	Date
Jan	32.5 mm (1.3 in)	25 January 1952
Feb	47.5 mm (1.9 in)	10 February 1978
Mar	35.1 mm (1.4 in)	2 March 1978
Apr	25.4 mm (1.0 in)	26 April 1978
May	54.4 mm (2.1 in)	20 May 1975
Jun	43.2 mm (1.7 in)	16 June 1969
Jul	63.8 mm (2.5 in)	22 July 1968
Aug	36.3 mm (1.4 in)	12 August 1930
Sep	37.6 mm (1.5 in)	18 September 1978
Oct	66.0 mm (2.6 in)	28 October 1946
Nov	43.2 mm (1.7 in)	17 November 1965
Dec	39.4 mm (1.6 in)	26 December 1946

Period of Record Coverage

1963 to 1984

22 years of record at Eureka, 1963 to 1984. 5 years have data for under 90 percent of days and are left out of rankings: 1963, 1980, 1981, 1983, 1984.

Days with data per year at Eureka
Year	Days with data	Share of year	Complete
1963	27	7%	No
1964	353	96%	Yes
1965	360	99%	Yes
1966	356	98%	Yes
1967	364	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	361	99%	Yes
1972	366	100%	Yes
1973	335	92%	Yes
1974	365	100%	Yes
1975	355	97%	Yes
1976	366	100%	Yes
1977	361	99%	Yes
1978	339	93%	Yes
1979	365	100%	Yes
1980	60	16%	No
1981	73	20%	No
1982	346	95%	Yes
1983	287	79%	No
1984	102	28%	No

Latest Records

Latest records at Eureka
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 July 1984	Eureka, US	daily rain	14.5 mm (0.6 in)	8.1 mm (0.32 in)	19 years	20 of 100 (Routine)
16 February 1984	Eureka, US	daily snowfall	20.3 cm (8.0 in)	2.5 cm (1.0 in)	41 years	21 of 100 (Routine)
14 January 1984	Eureka, US	daily snowfall	15.2 cm (6.0 in)	3.8 cm (1.5 in)	34 years	20 of 100 (Routine)
27 December 1983	Eureka, US	daily snow depth	68.6 cm (27.0 in)	10.2 cm (4.0 in)	34 years	23 of 100 (Routine)
26 December 1983	Eureka, US	daily snow depth	61.0 cm (24.0 in)	12.7 cm (5.0 in)	33 years	25 of 100 (Routine)
25 December 1983	Eureka, US	daily snow depth	68.6 cm (27.0 in)	20.3 cm (8.0 in)	33 years	32 of 100 (Routine)
24 December 1983	Eureka, US	daily snow depth	73.7 cm (29.0 in)	25.4 cm (10.0 in)	33 years	36 of 100 (Notable)
23 December 1983	Eureka, US	daily snow depth	61.0 cm (24.0 in)	20.4 cm (8.0 in)	33 years	32 of 100 (Routine)
20 December 1983	Eureka, US	daily snow depth	55.9 cm (22.0 in)	12.7 cm (5.0 in)	33 years	25 of 100 (Routine)
20 December 1983	Eureka, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	16 years	2 of 100 (Routine)
19 December 1983	Eureka, US	daily snow depth	55.9 cm (22.0 in)	12.7 cm (5.0 in)	33 years	25 of 100 (Routine)
15 December 1983	Eureka, US	daily snowfall	33.0 cm (13.0 in)	24.1 cm (9.5 in)	46 years	54 of 100 (Notable)
15 December 1983	Eureka, US	daily snow depth	61.0 cm (24.0 in)	22.9 cm (9.0 in)	52 years	39 of 100 (Notable)
4 December 1983	Eureka, US	daily snow depth	43.2 cm (17.0 in)	17.8 cm (7.0 in)	52 years	35 of 100 (Notable)
4 December 1983	Eureka, US	daily snowfall	33.0 cm (13.0 in)	16.5 cm (6.5 in)	10 years	32 of 100 (Routine)
1 December 1983	Eureka, US	daily snow depth	40.6 cm (16.0 in)	2.5 cm (1.0 in)	0 years	7 of 100 (Routine)
28 November 1983	Eureka, US	daily snow depth	43.2 cm (17.0 in)	17.8 cm (7.0 in)	48 years	40 of 100 (Notable)
27 November 1983	Eureka, US	daily snow depth	43.2 cm (17.0 in)	2.6 cm (1.0 in)	52 years	23 of 100 (Routine)
24 November 1983	Eureka, US	daily snow depth	45.7 cm (18.0 in)	10.1 cm (4.0 in)	52 years	32 of 100 (Routine)
23 November 1983	Eureka, US	daily snow depth	48.3 cm (19.0 in)	12.7 cm (5.0 in)	52 years	35 of 100 (Notable)

Climate Trend

15 complete years, 1964 to 1982

One stripe for each of 15 complete years at Eureka, 1964 to 1982. Blue stripes are years cooler than the station's own mean of 8.0 C (46.5 F); red stripes are warmer. The coolest year was 1964, at 6.8 C (44.2 F), and the warmest was 1977, at 9.0 C (48.2 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at Eureka as warming stripes, 1964 to 1982
Year	Annual mean temperature	Difference from the station mean
1964	6.8 C	-1.25 C
1965	7.9 C	-0.14 C
1966	8.5 C	+0.47 C
1967	8.3 C	+0.24 C
1968	8.0 C	-0.09 C
1969	8.2 C	+0.11 C
1970	8.1 C	+0.03 C
1971	7.5 C	-0.59 C
1972	8.6 C	+0.60 C
1974	8.6 C	+0.58 C
1975	7.3 C	-0.78 C
1976	8.7 C	+0.69 C
1977	9.0 C	+0.96 C
1979	7.9 C	-0.10 C
1982	7.3 C	-0.79 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1930 to 1984

Yearly extremes at Eureka: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1972	33.3 C (91.9 F)	22
Coldest night (TNn)	-28.9 C (-20.0 F)	1971	-21.9 C (-7.5 F)	22
Wettest day (Rx1day)	66.0 mm (2.6 in)	1946	26.2 mm (1.0 in)	55
Wettest five days (Rx5day)	109.8 mm (4.3 in)	1978	47.5 mm (1.9 in)	55
Longest dry spell (CDD)	71 days	1944	33 days	55

Hottest day (TXx)

The hottest day of the year at Eureka, 1930 to 1984. The record is 36.7 C (98.1 F) in 1972, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Eureka by year
Year	Hottest day (TXx)
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	11.1 C (52.0 F)
1964	33.3 C (91.9 F)
1965	32.2 C (90.0 F)
1966	33.9 C (93.0 F)
1967	33.3 C (91.9 F)
1968	33.3 C (91.9 F)
1969	32.8 C (91.0 F)
1970	35.0 C (95.0 F)
1971	33.3 C (91.9 F)
1972	36.7 C (98.1 F)
1973	34.4 C (93.9 F)
1974	34.4 C (93.9 F)
1975	32.8 C (91.0 F)
1976	34.4 C (93.9 F)
1977	33.9 C (93.0 F)
1978	35.0 C (95.0 F)
1979	35.0 C (95.0 F)
1980	15.6 C (60.1 F)
1981	16.1 C (61.0 F)
1982	34.4 C (93.9 F)
1983	32.8 C (91.0 F)
1984	32.8 C (91.0 F)

Coldest night (TNn)

The coldest night of the year at Eureka, 1930 to 1984. The record is -28.9 C (-20.0 F) in 1971, marked on the chart; the median year is -21.9 C (-7.5 F).

Coldest night (TNn) at Eureka by year
Year	Coldest night (TNn)
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	-21.1 C (-6.0 F)
1964	-21.7 C (-7.1 F)
1965	-18.9 C (-2.0 F)
1966	-23.3 C (-9.9 F)
1967	-20.0 C (-4.0 F)
1968	-20.0 C (-4.0 F)
1969	-18.9 C (-2.0 F)
1970	-21.7 C (-7.1 F)
1971	-28.9 C (-20.0 F)
1972	-25.0 C (-13.0 F)
1973	-25.0 C (-13.0 F)
1974	-23.3 C (-9.9 F)
1975	-22.2 C (-8.0 F)
1976	-23.9 C (-11.0 F)
1977	-20.6 C (-5.1 F)
1978	-25.6 C (-14.1 F)
1979	-26.7 C (-16.1 F)
1980	-17.8 C (0.0 F)
1981	-15.6 C (3.9 F)
1982	-25.0 C (-13.0 F)
1983	-20.6 C (-5.1 F)
1984	-25.0 C (-13.0 F)

Wettest day (Rx1day)

The wettest day of the year at Eureka, 1930 to 1984. The record is 66.0 mm (2.6 in) in 1946, marked on the chart; the median year is 26.2 mm (1.0 in).

Wettest day (Rx1day) at Eureka by year
Year	Wettest day (Rx1day)
1930	36.3 mm (1.4 in)
1931	27.7 mm (1.1 in)
1932	27.4 mm (1.1 in)
1933	15.7 mm (0.6 in)
1934	21.6 mm (0.9 in)
1935	14.5 mm (0.6 in)
1936	34.0 mm (1.3 in)
1937	27.4 mm (1.1 in)
1938	24.9 mm (1.0 in)
1939	26.2 mm (1.0 in)
1940	30.5 mm (1.2 in)
1941	25.1 mm (1.0 in)
1942	13.5 mm (0.5 in)
1943	27.4 mm (1.1 in)
1944	24.6 mm (1.0 in)
1945	20.3 mm (0.8 in)
1946	66.0 mm (2.6 in)
1947	33.5 mm (1.3 in)
1948	15.2 mm (0.6 in)
1949	25.4 mm (1.0 in)
1950	17.0 mm (0.7 in)
1951	33.5 mm (1.3 in)
1952	32.5 mm (1.3 in)
1953	19.6 mm (0.8 in)
1954	26.2 mm (1.0 in)
1955	30.2 mm (1.2 in)
1956	15.7 mm (0.6 in)
1957	20.6 mm (0.8 in)
1958	23.1 mm (0.9 in)
1959	25.7 mm (1.0 in)
1960	21.8 mm (0.9 in)
1961	19.6 mm (0.8 in)
1962	17.5 mm (0.7 in)
1963	28.4 mm (1.1 in)
1964	26.2 mm (1.0 in)
1965	53.6 mm (2.1 in)
1966	33.5 mm (1.3 in)
1967	28.7 mm (1.1 in)
1968	63.8 mm (2.5 in)
1969	43.2 mm (1.7 in)
1970	27.9 mm (1.1 in)
1971	23.6 mm (0.9 in)
1972	26.2 mm (1.0 in)
1973	23.1 mm (0.9 in)
1974	21.3 mm (0.8 in)
1975	54.4 mm (2.1 in)
1976	38.6 mm (1.5 in)
1977	32.0 mm (1.3 in)
1978	47.5 mm (1.9 in)
1979	46.0 mm (1.8 in)
1980	33.5 mm (1.3 in)
1981	20.1 mm (0.8 in)
1982	34.8 mm (1.4 in)
1983	28.4 mm (1.1 in)
1984	14.5 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Eureka, 1930 to 1984. The record is 109.8 mm (4.3 in) in 1978, marked on the chart; the median year is 47.5 mm (1.9 in).

Wettest five days (Rx5day) at Eureka by year
Year	Wettest five days (Rx5day)
1930	63.6 mm (2.5 in)
1931	44.8 mm (1.8 in)
1932	41.4 mm (1.6 in)
1933	32.2 mm (1.3 in)
1934	34.5 mm (1.4 in)
1935	32.8 mm (1.3 in)
1936	61.4 mm (2.4 in)
1937	42.1 mm (1.7 in)
1938	50.8 mm (2.0 in)
1939	34.6 mm (1.4 in)
1940	32.2 mm (1.3 in)
1941	48.0 mm (1.9 in)
1942	36.1 mm (1.4 in)
1943	50.8 mm (2.0 in)
1944	61.7 mm (2.4 in)
1945	42.1 mm (1.7 in)
1946	109.4 mm (4.3 in)
1947	48.2 mm (1.9 in)
1948	31.9 mm (1.3 in)
1949	55.6 mm (2.2 in)
1950	24.1 mm (0.9 in)
1951	68.0 mm (2.7 in)
1952	65.0 mm (2.6 in)
1953	33.3 mm (1.3 in)
1954	35.8 mm (1.4 in)
1955	39.4 mm (1.6 in)
1956	34.1 mm (1.3 in)
1957	38.9 mm (1.5 in)
1958	31.0 mm (1.2 in)
1959	36.5 mm (1.4 in)
1960	37.8 mm (1.5 in)
1961	42.7 mm (1.7 in)
1962	39.2 mm (1.5 in)
1963	54.3 mm (2.1 in)
1964	48.6 mm (1.9 in)
1965	77.4 mm (3.0 in)
1966	75.1 mm (3.0 in)
1967	60.4 mm (2.4 in)
1968	77.0 mm (3.0 in)
1969	68.3 mm (2.7 in)
1970	60.0 mm (2.4 in)
1971	54.8 mm (2.2 in)
1972	37.6 mm (1.5 in)
1973	47.5 mm (1.9 in)
1974	43.2 mm (1.7 in)
1975	58.4 mm (2.3 in)
1976	49.2 mm (1.9 in)
1977	48.5 mm (1.9 in)
1978	109.8 mm (4.3 in)
1979	47.3 mm (1.9 in)
1980	70.8 mm (2.8 in)
1981	21.3 mm (0.8 in)
1982	102.9 mm (4.1 in)
1983	59.0 mm (2.3 in)
1984	39.1 mm (1.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Eureka, 1930 to 1984. The record is 71 days in 1944, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Eureka by year
Year	Longest dry spell (CDD)
1930	36 days
1931	49 days
1932	30 days
1933	54 days
1934	64 days
1935	46 days
1936	32 days
1937	27 days
1938	22 days
1939	44 days
1940	21 days
1941	20 days
1942	41 days
1943	46 days
1944	71 days
1945	17 days
1946	55 days
1947	22 days
1948	41 days
1949	29 days
1950	33 days
1951	37 days
1952	64 days
1953	31 days
1954	28 days
1955	30 days
1956	58 days
1957	33 days
1958	51 days
1959	35 days
1960	49 days
1961	33 days
1962	50 days
1963	26 days
1964	45 days
1965	30 days
1966	46 days
1967	43 days
1968	16 days
1969	39 days
1970	21 days
1971	24 days
1972	49 days
1973	27 days
1974	54 days
1975	23 days
1976	41 days
1977	29 days
1978	49 days
1979	58 days
1980	9 days
1981	13 days
1982	19 days
1983	23 days
1984	17 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

49 years, 1931 to 1982

A day with at least 26.4 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 74.1 mm (2.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Eureka: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	26.4 mm (1.0 in)
5 years	36.5 mm (1.4 in)
10 years	44.1 mm (1.7 in)
25 years	55.0 mm (2.2 in)
50 years	64.1 mm (2.5 in)	Longer than the 49 years of record
100 years	74.1 mm (2.9 in)	Longer than the 49 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 49 years of values from 1931 to 1982.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 66.0 mm (2.6 in) in 1946; 63.8 mm (2.5 in) in 1968; 54.4 mm (2.1 in) in 1975.

Download the Data

Data for Eureka standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Eureka 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).