Decker Weather Records (USC00242266)

Record envelope, standing records and threshold days for Decker (USC00242266), Montana, United States, with 101 years of record.

Key Facts for Decker

Decker (USC00242266) is a weather station in Montana, United States at 45.01 latitude and -106.86 longitude, 1,073 m (3,520 ft) above sea level.
The station reports from 1904 to 2004, 101 years of record.
1,464 records set at Decker still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Decker set a daily record precipitation of 12.7 mm (0.5 in) on 16 October 2004.

About the Station

Location: Montana, United States, 45.01 latitude, -106.86 longitude.
Elevation: 1,073 m (3,520 ft).
Period of record: 1904 to 2004, 101 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 Decker. 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 Decker, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.3 C (55.9 F)	-42.2 C (-44.0 F)	n/a	n/a
Feb	17.8 C (64.0 F)	-44.4 C (-47.9 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-32.2 C (-26.0 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-14.4 C (6.1 F)	n/a	n/a
May	32.2 C (90.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	36.7 C (98.1 F)	0.6 C (33.1 F)	n/a	n/a
Jul	38.3 C (100.9 F)	-0.6 C (30.9 F)	n/a	n/a
Aug	38.3 C (100.9 F)	0.0 C (32.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	-6.7 C (19.9 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-15.0 C (5.0 F)	n/a	n/a
Nov	23.3 C (73.9 F)	-27.8 C (-18.0 F)	n/a	n/a
Dec	25.0 C (77.0 F)	-34.4 C (-29.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Decker still stand. 1906 holds the most, with 301.

Wettest Day of Each Month

Jun: 79.5 mm (3.1 in)

The wettest day on record for each calendar month at Decker. The most was 79.5 mm (3.1 in) on 9 June 1968.

Record daily precipitation for each month at Decker
Month	Record daily precipitation (mm)	Date
Jan	17.8 mm (0.7 in)	29 January 1965
Feb	11.4 mm (0.4 in)	4 February 1986
Mar	14.7 mm (0.6 in)	23 March 1994
Apr	38.1 mm (1.5 in)	25 April 1971
May	54.6 mm (2.1 in)	21 May 1981
Jun	79.5 mm (3.1 in)	9 June 1968
Jul	50.8 mm (2.0 in)	15 July 1907
Aug	53.3 mm (2.1 in)	2 August 1962
Sep	50.8 mm (2.0 in)	3 September 1909
Oct	46.5 mm (1.8 in)	31 October 1974
Nov	27.9 mm (1.1 in)	11 November 1978
Dec	21.6 mm (0.9 in)	23 December 1989

Period of Record Coverage

1904 to 1978

9 years of record at Decker, 1904 to 1978. 4 years have data for under 90 percent of days and are left out of rankings: 1904, 1910, 1911, 1978.

Latest Records

Latest records at Decker
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
16 October 2004	Decker, US	daily rain	12.7 mm (0.5 in)	2.5 mm (0.10 in)	21 years	20 of 100 (Routine)
15 October 2004	Decker, US	daily rain	12.7 mm (0.5 in)	3.8 mm (0.15 in)	12 years	19 of 100 (Routine)
28 July 2004	Decker, US	daily rain	13.5 mm (0.5 in)	7.1 mm (0.28 in)	42 years	20 of 100 (Routine)
22 July 2004	Decker, US	daily rain	5.3 mm (0.21 in)	1.7 mm (0.07 in)	34 years	20 of 100 (Routine)
5 July 2004	Decker, US	daily rain	31.5 mm (1.2 in)	24.4 mm (1.0 in)	10 years	46 of 100 (Notable)
20 November 2003	Decker, US	daily rain	5.6 mm (0.22 in)	1.8 mm (0.07 in)	24 years	20 of 100 (Routine)
4 November 2003	Decker, US	daily rain	3.3 mm (0.13 in)	0.8 mm (0.03 in)	52 years	20 of 100 (Routine)
10 September 2003	Decker, US	daily rain	13.0 mm (0.5 in)	4.6 mm (0.18 in)	16 years	20 of 100 (Routine)
24 June 2003	Decker, US	daily rain	24.1 mm (0.9 in)	6.3 mm (0.25 in)	30 years	20 of 100 (Routine)
18 March 2003	Decker, US	daily rain	7.9 mm (0.31 in)	1.5 mm (0.06 in)	10 years	18 of 100 (Routine)
17 March 2003	Decker, US	daily rain	11.4 mm (0.4 in)	2.3 mm (0.09 in)	13 years	20 of 100 (Routine)
14 February 2003	Decker, US	daily rain	3.8 mm (0.15 in)	0.2 mm (0.01 in)	5 years	11 of 100 (Routine)
21 January 2003	Decker, US	daily rain	3.6 mm (0.14 in)	0.6 mm (0.02 in)	28 years	20 of 100 (Routine)
22 October 2002	Decker, US	daily rain	5.6 mm (0.22 in)	4.3 mm (0.17 in)	12 years	18 of 100 (Routine)
11 October 2002	Decker, US	daily rain	9.7 mm (0.38 in)	7.4 mm (0.29 in)	51 years	20 of 100 (Routine)
24 February 2002	Decker, US	daily rain	5.8 mm (0.23 in)	2.2 mm (0.09 in)	8 years	20 of 100 (Routine)
21 December 2001	Decker, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	36 years	20 of 100 (Routine)
20 December 2001	Decker, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	36 years	20 of 100 (Routine)
19 December 2001	Decker, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	36 years	20 of 100 (Routine)
18 December 2001	Decker, US	daily snow depth (Tie)	2.5 cm (1.0 in)	tie	20 years	3 of 100 (Routine)

Extremes by Year

1904 to 2004

Yearly extremes at Decker: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1904	37.8 C (100.0 F)	9
Coldest night (TNn)	-44.4 C (-47.9 F)	1905	-36.7 C (-34.1 F)	9
Wettest day (Rx1day)	79.5 mm (3.1 in)	1968	27.2 mm (1.1 in)	59
Wettest five days (Rx5day)	131.4 mm (5.2 in)	1967	38.6 mm (1.5 in)	58
Longest dry spell (CDD)	89 days	1996	33 days	59

Hottest day (TXx)

The hottest day of the year at Decker, 1904 to 2004. The record is 38.9 C (102.0 F) in 1904, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Decker by year
Year	Hottest day (TXx)
1904	38.9 C (102.0 F)
1905	38.3 C (100.9 F)
1906	38.3 C (100.9 F)
1907	37.8 C (100.0 F)
1908	38.3 C (100.9 F)
1909	37.8 C (100.0 F)
1910	30.0 C (86.0 F)
1911	4.4 C (39.9 F)
1950	n/a
1951	n/a
1952	n/a
1955	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	28.9 C (84.0 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a

Coldest night (TNn)

The coldest night of the year at Decker, 1904 to 2004. The record is -44.4 C (-47.9 F) in 1905, marked on the chart; the median year is -36.7 C (-34.1 F).

Coldest night (TNn) at Decker by year
Year	Coldest night (TNn)
1904	-26.1 C (-15.0 F)
1905	-44.4 C (-47.9 F)
1906	-32.2 C (-26.0 F)
1907	-36.1 C (-33.0 F)
1908	-37.2 C (-35.0 F)
1909	-36.7 C (-34.1 F)
1910	-40.0 C (-40.0 F)
1911	-42.2 C (-44.0 F)
1950	n/a
1951	n/a
1952	n/a
1955	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	-30.0 C (-22.0 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a

Wettest day (Rx1day)

The wettest day of the year at Decker, 1904 to 2004. The record is 79.5 mm (3.1 in) in 1968, marked on the chart; the median year is 27.2 mm (1.1 in).

Wettest day (Rx1day) at Decker by year
Year	Wettest day (Rx1day)
1904	12.7 mm (0.5 in)
1905	25.4 mm (1.0 in)
1906	25.4 mm (1.0 in)
1907	50.8 mm (2.0 in)
1908	50.8 mm (2.0 in)
1909	50.8 mm (2.0 in)
1910	12.7 mm (0.5 in)
1911	5.1 mm (0.20 in)
1950	34.0 mm (1.3 in)
1951	29.0 mm (1.1 in)
1952	35.6 mm (1.4 in)
1955	0.5 mm (0.02 in)
1958	15.5 mm (0.6 in)
1959	13.5 mm (0.5 in)
1960	21.8 mm (0.9 in)
1961	35.6 mm (1.4 in)
1962	53.3 mm (2.1 in)
1963	47.5 mm (1.9 in)
1964	27.2 mm (1.1 in)
1965	17.8 mm (0.7 in)
1966	27.2 mm (1.1 in)
1967	68.6 mm (2.7 in)
1968	79.5 mm (3.1 in)
1969	17.8 mm (0.7 in)
1970	29.0 mm (1.1 in)
1971	38.1 mm (1.5 in)
1972	19.6 mm (0.8 in)
1973	20.6 mm (0.8 in)
1974	46.5 mm (1.8 in)
1975	36.1 mm (1.4 in)
1976	21.6 mm (0.9 in)
1977	33.8 mm (1.3 in)
1978	52.1 mm (2.1 in)
1979	22.9 mm (0.9 in)
1980	36.3 mm (1.4 in)
1981	54.6 mm (2.1 in)
1982	25.4 mm (1.0 in)
1983	18.3 mm (0.7 in)
1984	30.5 mm (1.2 in)
1985	19.1 mm (0.8 in)
1986	67.3 mm (2.6 in)
1987	21.6 mm (0.9 in)
1988	21.6 mm (0.9 in)
1989	21.6 mm (0.9 in)
1990	27.9 mm (1.1 in)
1991	22.9 mm (0.9 in)
1992	51.8 mm (2.0 in)
1993	29.0 mm (1.1 in)
1994	25.7 mm (1.0 in)
1995	19.3 mm (0.8 in)
1996	20.3 mm (0.8 in)
1997	31.8 mm (1.3 in)
1998	18.8 mm (0.7 in)
1999	47.8 mm (1.9 in)
2000	15.2 mm (0.6 in)
2001	29.7 mm (1.2 in)
2002	15.2 mm (0.6 in)
2003	24.1 mm (0.9 in)
2004	31.5 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Decker, 1904 to 2004. The record is 131.4 mm (5.2 in) in 1967, marked on the chart; the median year is 38.6 mm (1.5 in).

Wettest five days (Rx5day) at Decker by year
Year	Wettest five days (Rx5day)
1904	12.7 mm (0.5 in)
1905	35.1 mm (1.4 in)
1906	40.7 mm (1.6 in)
1907	63.5 mm (2.5 in)
1908	88.9 mm (3.5 in)
1909	66.1 mm (2.6 in)
1910	12.7 mm (0.5 in)
1911	5.1 mm (0.20 in)
1950	48.5 mm (1.9 in)
1951	37.4 mm (1.5 in)
1952	48.8 mm (1.9 in)
1955	n/a
1958	23.1 mm (0.9 in)
1959	16.3 mm (0.6 in)
1960	24.6 mm (1.0 in)
1961	40.7 mm (1.6 in)
1962	59.4 mm (2.3 in)
1963	49.6 mm (2.0 in)
1964	50.8 mm (2.0 in)
1965	32.2 mm (1.3 in)
1966	33.3 mm (1.3 in)
1967	131.4 mm (5.2 in)
1968	107.5 mm (4.2 in)
1969	38.9 mm (1.5 in)
1970	33.0 mm (1.3 in)
1971	59.7 mm (2.4 in)
1972	29.5 mm (1.2 in)
1973	43.9 mm (1.7 in)
1974	56.7 mm (2.2 in)
1975	73.6 mm (2.9 in)
1976	48.7 mm (1.9 in)
1977	81.1 mm (3.2 in)
1978	111.8 mm (4.4 in)
1979	26.7 mm (1.1 in)
1980	55.6 mm (2.2 in)
1981	56.4 mm (2.2 in)
1982	31.7 mm (1.2 in)
1983	24.6 mm (1.0 in)
1984	41.9 mm (1.6 in)
1985	28.0 mm (1.1 in)
1986	77.0 mm (3.0 in)
1987	34.3 mm (1.4 in)
1988	28.0 mm (1.1 in)
1989	34.2 mm (1.3 in)
1990	38.2 mm (1.5 in)
1991	29.3 mm (1.2 in)
1992	87.4 mm (3.4 in)
1993	31.3 mm (1.2 in)
1994	29.5 mm (1.2 in)
1995	33.3 mm (1.3 in)
1996	53.4 mm (2.1 in)
1997	63.6 mm (2.5 in)
1998	21.1 mm (0.8 in)
1999	57.7 mm (2.3 in)
2000	21.3 mm (0.8 in)
2001	33.6 mm (1.3 in)
2002	22.7 mm (0.9 in)
2003	30.8 mm (1.2 in)
2004	41.1 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Decker, 1904 to 2004. The record is 89 days in 1996, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Decker by year
Year	Longest dry spell (CDD)
1904	44 days
1905	46 days
1906	41 days
1907	65 days
1908	44 days
1909	70 days
1910	35 days
1911	13 days
1950	26 days
1951	19 days
1952	41 days
1955	1 day
1958	19 days
1959	43 days
1960	34 days
1961	33 days
1962	28 days
1963	32 days
1964	62 days
1965	83 days
1966	28 days
1967	34 days
1968	30 days
1969	47 days
1970	33 days
1971	21 days
1972	27 days
1973	46 days
1974	24 days
1975	33 days
1976	47 days
1977	26 days
1978	31 days
1979	33 days
1980	26 days
1981	51 days
1982	23 days
1983	83 days
1984	32 days
1985	35 days
1986	32 days
1987	34 days
1988	32 days
1989	24 days
1990	24 days
1991	25 days
1992	50 days
1993	27 days
1994	44 days
1995	29 days
1996	89 days
1997	27 days
1998	25 days
1999	46 days
2000	31 days
2001	36 days
2002	31 days
2003	27 days
2004	35 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

44 years, 1905 to 2002

A day with at least 29.7 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 95.4 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Decker: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	29.7 mm (1.2 in)
5 years	43.4 mm (1.7 in)
10 years	53.8 mm (2.1 in)
25 years	68.8 mm (2.7 in)
50 years	81.5 mm (3.2 in)	Longer than the 44 years of record
100 years	95.4 mm (3.8 in)	Longer than the 44 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, 44 years of values from 1905 to 2002.

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: 79.5 mm (3.1 in) in 1968; 68.6 mm (2.7 in) in 1967; 67.3 mm (2.6 in) in 1986.

Download the Data

Data for Decker standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Decker 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 2026-10-16 (16 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).

Year	Days with data	Share of year	Complete
1904	139	38%	No
1905	361	99%	Yes
1906	364	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	205	56%	No
1911	29	8%	No
1978	87	24%	No