Hecla Weather Records (USC00484440)

Record envelope, standing records and threshold days for Hecla (USC00484440), Wyoming, United States, with 82 years of record.

Key Facts for Hecla

Hecla (USC00484440) is a weather station in Wyoming, United States at 41.15 latitude and -105.18 longitude, 2,074 m (6,804 ft) above sea level.
The station reports from 1898 to 1979, 82 years of record.
1,390 records set at Hecla still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Hecla set a monthly record daily snowfall of 39.4 cm (15.5 in) on 18 March 1979.

About the Station

Location: Wyoming, United States, 41.15 latitude, -105.18 longitude.
Elevation: 2,074 m (6,804 ft).
Period of record: 1898 to 1979, 82 years.
Eligible elements: prcp, snow.

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 Hecla. 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 Hecla, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.6 C (60.1 F)	-18.9 C (-2.0 F)	n/a	n/a
Feb	13.9 C (57.0 F)	-31.1 C (-24.0 F)	n/a	n/a
Mar	13.9 C (57.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Apr	25.6 C (78.1 F)	-13.3 C (8.1 F)	n/a	n/a
May	25.6 C (78.1 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	33.3 C (91.9 F)	-2.2 C (28.0 F)	n/a	n/a
Jul	34.4 C (93.9 F)	0.6 C (33.1 F)	n/a	n/a
Aug	33.9 C (93.0 F)	2.8 C (37.0 F)	n/a	n/a
Sep	27.2 C (81.0 F)	-6.7 C (19.9 F)	n/a	n/a
Oct	23.9 C (75.0 F)	-9.4 C (15.1 F)	n/a	n/a
Nov	20.0 C (68.0 F)	-14.4 C (6.1 F)	n/a	n/a
Dec	15.6 C (60.1 F)	-27.2 C (-17.0 F)	n/a	n/a

Which Years Hold Standing Records

1,390 standing records

1,390 records at Hecla still stand. 1899 holds the most, with 614.

All-Time Record Progression

1 new records

1 all-time records were set at Hecla between 3 November 1973 and 3 November 1973. Each dot is a new record.

Wettest Day of Each Month

Apr: 64.8 mm (2.6 in)

The wettest day on record for each calendar month at Hecla. The most was 64.8 mm (2.6 in) on 22 April 1923.

Record daily precipitation for each month at Hecla
Month	Record daily precipitation (mm)	Date
Jan	20.3 mm (0.8 in)	24 January 1921
Feb	25.4 mm (1.0 in)	29 February 1928
Mar	33.3 mm (1.3 in)	15 March 1946
Apr	64.8 mm (2.6 in)	22 April 1923
May	52.6 mm (2.1 in)	31 May 1918
Jun	60.7 mm (2.4 in)	8 June 1974
Jul	58.9 mm (2.3 in)	18 July 1958
Aug	52.3 mm (2.1 in)	12 August 1930
Sep	44.5 mm (1.8 in)	9 September 1919
Oct	48.0 mm (1.9 in)	13 October 1942
Nov	31.2 mm (1.2 in)	3 November 1973
Dec	30.5 mm (1.2 in)	13 December 1925

Period of Record Coverage

1898 to 1918

6 years of record at Hecla, 1898 to 1918. 6 years have data for under 90 percent of days and are left out of rankings: 1898, 1899, 1909, 1910, 1916, 1918.

Latest Records

Latest records at Hecla
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 March 1979	Hecla, US	monthly snowfall	39.4 cm (15.5 in)	5.9 cm (2.3 in)	51 years	44 of 100 (Notable)
18 March 1979	Hecla, US	daily rain	31.5 mm (1.2 in)	7.9 mm (0.31 in)	17 years	29 of 100 (Routine)
28 December 1978	Hecla, US	daily snowfall	4.8 cm (1.9 in)	0.5 cm (0.2 in)	29 years	17 of 100 (Routine)
28 December 1978	Hecla, US	daily rain (Tie)	3.0 mm (0.12 in)	tie	29 years	4 of 100 (Routine)
25 December 1978	Hecla, US	daily snowfall	8.4 cm (3.3 in)	3.3 cm (1.3 in)	56 years	31 of 100 (Routine)
2 December 1978	Hecla, US	daily rain	7.4 mm (0.29 in)	5.6 mm (0.22 in)	44 years	20 of 100 (Routine)
2 December 1978	Hecla, US	daily snowfall	7.6 cm (3.0 in)	1.2 cm (0.5 in)	4 years	11 of 100 (Routine)
10 November 1978	Hecla, US	daily snowfall	7.6 cm (3.0 in)	1.2 cm (0.5 in)	59 years	27 of 100 (Routine)
25 October 1978	Hecla, US	daily snowfall	5.8 cm (2.3 in)	0.7 cm (0.3 in)	55 years	25 of 100 (Routine)
21 October 1978	Hecla, US	daily rain	20.8 mm (0.8 in)	13.7 mm (0.5 in)	32 years	20 of 100 (Routine)
19 September 1978	Hecla, US	daily snowfall	5.8 cm (2.3 in)	4.5 cm (1.8 in)	3 years	17 of 100 (Routine)
8 August 1978	Hecla, US	daily rain	13.0 mm (0.5 in)	1.3 mm (0.05 in)	13 years	13 of 100 (Routine)
31 July 1978	Hecla, US	daily rain	38.4 mm (1.5 in)	14.5 mm (0.6 in)	4 years	28 of 100 (Routine)
6 July 1978	Hecla, US	daily rain	30.5 mm (1.2 in)	6.4 mm (0.25 in)	11 years	19 of 100 (Routine)
5 December 1977	Hecla, US	daily snowfall	15.2 cm (6.0 in)	12.7 cm (5.0 in)	8 years	38 of 100 (Notable)
5 December 1977	Hecla, US	daily rain	6.4 mm (0.25 in)	5.1 mm (0.20 in)	35 years	20 of 100 (Routine)
25 July 1977	Hecla, US	daily rain	32.8 mm (1.3 in)	8.9 mm (0.35 in)	27 years	28 of 100 (Routine)
22 July 1977	Hecla, US	daily rain	19.8 mm (0.8 in)	1.5 mm (0.06 in)	34 years	20 of 100 (Routine)
20 July 1977	Hecla, US	daily rain (Tie)	14.0 mm (0.6 in)	tie	3 years	2 of 100 (Routine)
1 May 1977	Hecla, US	daily rain	45.2 mm (1.8 in)	29.5 mm (1.2 in)	67 years	64 of 100 (Major)

Extremes by Year

1898 to 1979

Yearly extremes at Hecla: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	34.4 C (93.9 F)	1916	33.3 C (91.9 F)	6
Coldest night (TNn)	-31.1 C (-24.0 F)	1899	-26.9 C (-16.5 F)	4
Wettest day (Rx1day)	64.8 mm (2.6 in)	1923	33.9 mm (1.3 in)	70
Wettest five days (Rx5day)	141.5 mm (5.6 in)	1930	50.5 mm (2.0 in)	69
Longest dry spell (CDD)	82 days	1977	29 days	70

Hottest day (TXx)

The hottest day of the year at Hecla, 1898 to 1979. The record is 34.4 C (93.9 F) in 1916, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Hecla by year
Year	Hottest day (TXx)
1898	15.6 C (60.1 F)
1899	33.3 C (91.9 F)
1909	31.1 C (88.0 F)
1910	33.3 C (91.9 F)
1914	n/a
1915	n/a
1916	34.4 C (93.9 F)
1917	n/a
1918	33.9 C (93.0 F)
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
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	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a

Coldest night (TNn)

The coldest night of the year at Hecla, 1898 to 1979. The record is -31.1 C (-24.0 F) in 1899, marked on the chart; the median year is -26.9 C (-16.5 F).

Coldest night (TNn) at Hecla by year
Year	Coldest night (TNn)
1898	-26.7 C (-16.1 F)
1899	-31.1 C (-24.0 F)
1909	-27.2 C (-17.0 F)
1910	-24.4 C (-11.9 F)
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
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	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a

Wettest day (Rx1day)

The wettest day of the year at Hecla, 1898 to 1979. The record is 64.8 mm (2.6 in) in 1923, marked on the chart; the median year is 33.9 mm (1.3 in).

Wettest day (Rx1day) at Hecla by year
Year	Wettest day (Rx1day)
1898	4.1 mm (0.16 in)
1899	36.8 mm (1.4 in)
1909	33.0 mm (1.3 in)
1910	19.3 mm (0.8 in)
1914	22.4 mm (0.9 in)
1915	33.0 mm (1.3 in)
1916	23.9 mm (0.9 in)
1917	38.1 mm (1.5 in)
1918	52.6 mm (2.1 in)
1919	44.5 mm (1.8 in)
1920	31.8 mm (1.3 in)
1921	22.4 mm (0.9 in)
1922	47.2 mm (1.9 in)
1923	64.8 mm (2.6 in)
1924	30.5 mm (1.2 in)
1925	30.5 mm (1.2 in)
1926	43.2 mm (1.7 in)
1927	33.0 mm (1.3 in)
1928	32.0 mm (1.3 in)
1929	45.7 mm (1.8 in)
1930	52.3 mm (2.1 in)
1931	22.9 mm (0.9 in)
1932	28.4 mm (1.1 in)
1933	44.5 mm (1.8 in)
1934	16.8 mm (0.7 in)
1935	41.1 mm (1.6 in)
1936	27.7 mm (1.1 in)
1937	46.2 mm (1.8 in)
1938	32.5 mm (1.3 in)
1939	25.1 mm (1.0 in)
1940	25.4 mm (1.0 in)
1941	26.4 mm (1.0 in)
1942	50.8 mm (2.0 in)
1943	34.5 mm (1.4 in)
1944	40.4 mm (1.6 in)
1945	25.9 mm (1.0 in)
1946	38.6 mm (1.5 in)
1947	42.4 mm (1.7 in)
1948	35.1 mm (1.4 in)
1949	43.7 mm (1.7 in)
1950	32.3 mm (1.3 in)
1951	33.5 mm (1.3 in)
1952	23.9 mm (0.9 in)
1953	43.9 mm (1.7 in)
1954	35.6 mm (1.4 in)
1955	16.8 mm (0.7 in)
1956	30.0 mm (1.2 in)
1957	37.6 mm (1.5 in)
1958	58.9 mm (2.3 in)
1959	36.6 mm (1.4 in)
1960	17.0 mm (0.7 in)
1961	50.3 mm (2.0 in)
1962	31.2 mm (1.2 in)
1963	50.5 mm (2.0 in)
1964	33.0 mm (1.3 in)
1965	42.7 mm (1.7 in)
1966	17.3 mm (0.7 in)
1967	34.3 mm (1.4 in)
1968	27.4 mm (1.1 in)
1969	38.6 mm (1.5 in)
1970	43.2 mm (1.7 in)
1971	30.7 mm (1.2 in)
1972	22.1 mm (0.9 in)
1973	45.7 mm (1.8 in)
1974	60.7 mm (2.4 in)
1975	47.2 mm (1.9 in)
1976	16.5 mm (0.6 in)
1977	45.2 mm (1.8 in)
1978	38.4 mm (1.5 in)
1979	31.5 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hecla, 1898 to 1979. The record is 141.5 mm (5.6 in) in 1930, marked on the chart; the median year is 50.5 mm (2.0 in).

Wettest five days (Rx5day) at Hecla by year
Year	Wettest five days (Rx5day)
1898	5.6 mm (0.22 in)
1899	39.3 mm (1.5 in)
1909	48.6 mm (1.9 in)
1910	41.6 mm (1.6 in)
1914	67.9 mm (2.7 in)
1915	42.1 mm (1.7 in)
1916	43.4 mm (1.7 in)
1917	61.4 mm (2.4 in)
1918	72.4 mm (2.9 in)
1919	45.5 mm (1.8 in)
1920	82.6 mm (3.3 in)
1921	45.8 mm (1.8 in)
1922	n/a
1923	36.9 mm (1.5 in)
1924	74.2 mm (2.9 in)
1925	45.7 mm (1.8 in)
1926	54.2 mm (2.1 in)
1927	81.8 mm (3.2 in)
1928	52.1 mm (2.1 in)
1929	69.3 mm (2.7 in)
1930	141.5 mm (5.6 in)
1931	33.0 mm (1.3 in)
1932	36.8 mm (1.4 in)
1933	54.4 mm (2.1 in)
1934	29.0 mm (1.1 in)
1935	65.5 mm (2.6 in)
1936	64.8 mm (2.6 in)
1937	70.7 mm (2.8 in)
1938	69.4 mm (2.7 in)
1939	33.7 mm (1.3 in)
1940	41.4 mm (1.6 in)
1941	52.6 mm (2.1 in)
1942	107.2 mm (4.2 in)
1943	57.9 mm (2.3 in)
1944	49.6 mm (2.0 in)
1945	38.4 mm (1.5 in)
1946	51.3 mm (2.0 in)
1947	45.7 mm (1.8 in)
1948	41.2 mm (1.6 in)
1949	94.0 mm (3.7 in)
1950	60.2 mm (2.4 in)
1951	66.3 mm (2.6 in)
1952	48.3 mm (1.9 in)
1953	69.3 mm (2.7 in)
1954	40.7 mm (1.6 in)
1955	42.7 mm (1.7 in)
1956	47.3 mm (1.9 in)
1957	51.8 mm (2.0 in)
1958	72.1 mm (2.8 in)
1959	86.4 mm (3.4 in)
1960	26.7 mm (1.1 in)
1961	70.9 mm (2.8 in)
1962	45.0 mm (1.8 in)
1963	65.3 mm (2.6 in)
1964	46.4 mm (1.8 in)
1965	86.1 mm (3.4 in)
1966	33.3 mm (1.3 in)
1967	49.1 mm (1.9 in)
1968	49.0 mm (1.9 in)
1969	50.8 mm (2.0 in)
1970	60.5 mm (2.4 in)
1971	45.0 mm (1.8 in)
1972	25.6 mm (1.0 in)
1973	50.5 mm (2.0 in)
1974	72.7 mm (2.9 in)
1975	61.2 mm (2.4 in)
1976	36.1 mm (1.4 in)
1977	83.8 mm (3.3 in)
1978	42.5 mm (1.7 in)
1979	42.9 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hecla, 1898 to 1979. The record is 82 days in 1977, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Hecla by year
Year	Longest dry spell (CDD)
1898	20 days
1899	21 days
1909	35 days
1910	21 days
1914	31 days
1915	14 days
1916	22 days
1917	35 days
1918	20 days
1919	28 days
1920	30 days
1921	3 days
1922	2 days
1923	2 days
1924	1 day
1925	16 days
1926	19 days
1927	28 days
1928	25 days
1929	31 days
1930	34 days
1931	34 days
1932	27 days
1933	35 days
1934	53 days
1935	51 days
1936	30 days
1937	26 days
1938	20 days
1939	23 days
1940	33 days
1941	29 days
1942	24 days
1943	65 days
1944	52 days
1945	18 days
1946	24 days
1947	22 days
1948	33 days
1949	37 days
1950	38 days
1951	19 days
1952	56 days
1953	38 days
1954	34 days
1955	26 days
1956	42 days
1957	41 days
1958	39 days
1959	28 days
1960	32 days
1961	24 days
1962	38 days
1963	33 days
1964	55 days
1965	26 days
1966	27 days
1967	28 days
1968	24 days
1969	38 days
1970	34 days
1971	24 days
1972	27 days
1973	31 days
1974	47 days
1975	29 days
1976	22 days
1977	82 days
1978	31 days
1979	32 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, 1919 to 1978

A day with at least 36.3 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 60.4 mm (2.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Hecla: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	36.3 mm (1.4 in)
5 years	46.1 mm (1.8 in)
10 years	50.9 mm (2.0 in)
25 years	55.6 mm (2.2 in)
50 years	58.3 mm (2.3 in)	Longer than the 49 years of record
100 years	60.4 mm (2.4 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 1919 to 1978.

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: 60.7 mm (2.4 in) in 1974; 58.9 mm (2.3 in) in 1958; 52.3 mm (2.1 in) in 1930.

Download the Data

Data for Hecla standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hecla 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 2026-10-14 (14 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).