Dumont Weather Records (USC00132388)

Record envelope, standing records and threshold days for Dumont (USC00132388), Iowa, United States, with 78 years of record.

Key Facts for Dumont

Dumont (USC00132388) is a weather station in Iowa, United States at 42.75 latitude and -92.98 longitude, 312 m (1,025 ft) above sea level.
The station reports from 1934 to 2011, 78 years of record.
42 records set at Dumont still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Dumont set a daily record precipitation of 86.9 mm (3.4 in) on 8 June 2008.

About the Station

Location: Iowa, United States, 42.75 latitude, -92.98 longitude.
Elevation: 312 m (1,025 ft).
Period of record: 1934 to 2011, 78 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 Dumont. 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 Dumont, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	-6.7 C (19.9 F)	-33.3 C (-27.9 F)	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

42 standing records

42 records at Dumont still stand. 1970 holds the most, with 42.

All-Time Record Progression

2 new records

2 all-time records were set at Dumont between 17 July 1968 and 4 January 1971. Each dot is a new record.

When Dumont set new all-time records
Date	Kind	Detail
1968-07-17	Record daily precipitation	Record daily precipitation 286.5 mm (11.3 in)
1971-01-04	Record daily snowfall	Record daily snowfall 48.3 cm (19.0 in)

Wettest Day of Each Month

Jul: 286.5 mm (11.3 in)

The wettest day on record for each calendar month at Dumont. The most was 286.5 mm (11.3 in) on 17 July 1968.

Record daily precipitation for each month at Dumont
Month	Record daily precipitation (mm)	Date
Jan	29.2 mm (1.1 in)	5 January 1946
Feb	44.2 mm (1.7 in)	28 February 1939
Mar	50.0 mm (2.0 in)	8 March 1961
Apr	91.2 mm (3.6 in)	25 April 2008
May	91.4 mm (3.6 in)	17 May 1999
Jun	140.7 mm (5.5 in)	26 June 1951
Jul	286.5 mm (11.3 in)	17 July 1968
Aug	100.3 mm (3.9 in)	31 August 1962
Sep	157.5 mm (6.2 in)	11 September 2006
Oct	64.0 mm (2.5 in)	6 October 1955
Nov	54.9 mm (2.2 in)	2 November 1992
Dec	68.6 mm (2.7 in)	7 December 2007

Period of Record Coverage

1970 to 1970

1 years of record at Dumont, 1970 to 1970. 1 years have data for under 90 percent of days and are left out of rankings: 1970.

Latest Records

Latest records at Dumont
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 June 2008	Dumont, US	daily rain	86.9 mm (3.4 in)	34.8 mm (1.4 in)	5 years	30 of 100 (Routine)
6 June 2008	Dumont, US	daily rain	30.5 mm (1.2 in)	6.6 mm (0.26 in)	18 years	16 of 100 (Routine)
5 June 2008	Dumont, US	daily rain	65.8 mm (2.6 in)	36.1 mm (1.4 in)	60 years	48 of 100 (Notable)
25 April 2008	Dumont, US	monthly rain	91.2 mm (3.6 in)	14.5 mm (0.6 in)	32 years	40 of 100 (Notable)
11 April 2008	Dumont, US	daily rain	32.5 mm (1.3 in)	11.2 mm (0.4 in)	64 years	37 of 100 (Notable)
1 April 2008	Dumont, US	daily rain	27.7 mm (1.1 in)	14.2 mm (0.6 in)	22 years	27 of 100 (Routine)
28 March 2008	Dumont, US	daily snowfall	5.1 cm (2.0 in)	1.0 cm (0.4 in)	69 years	28 of 100 (Routine)
29 February 2008	Dumont, US	daily rain	5.3 mm (0.21 in)	4.0 mm (0.16 in)	40 years	20 of 100 (Routine)
29 February 2008	Dumont, US	daily snowfall (Tie)	3.8 cm (1.5 in)	tie	40 years	4 of 100 (Routine)
26 January 2008	Dumont, US	daily rain	25.4 mm (1.0 in)	17.8 mm (0.7 in)	66 years	65 of 100 (Major)
17 January 2008	Dumont, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	68 years	6 of 100 (Routine)
7 December 2007	Dumont, US	monthly rain	68.6 mm (2.7 in)	30.0 mm (1.2 in)	24 years	64 of 100 (Major)
2 December 2007	Dumont, US	daily rain	29.2 mm (1.1 in)	19.0 mm (0.7 in)	20 years	48 of 100 (Notable)
2 December 2007	Dumont, US	daily snowfall	10.2 cm (4.0 in)	2.6 cm (1.0 in)	21 years	19 of 100 (Routine)
8 October 2007	Dumont, US	daily rain	41.1 mm (1.6 in)	17.5 mm (0.7 in)	29 years	32 of 100 (Routine)
3 October 2007	Dumont, US	daily rain	41.7 mm (1.6 in)	13.0 mm (0.5 in)	64 years	38 of 100 (Notable)
20 August 2007	Dumont, US	daily rain	75.7 mm (3.0 in)	25.7 mm (1.0 in)	10 years	27 of 100 (Routine)
24 May 2007	Dumont, US	daily rain	35.3 mm (1.4 in)	1.3 mm (0.05 in)	12 years	11 of 100 (Routine)
11 April 2007	Dumont, US	daily snowfall	3.6 cm (1.4 in)	1.1 cm (0.4 in)	40 years	20 of 100 (Routine)
11 April 2007	Dumont, US	daily snow depth (Tie)	2.5 cm (1.0 in)	tie	56 years	5 of 100 (Routine)

Extremes by Year

1934 to 2011

Yearly extremes at Dumont: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	-6.7 C (19.9 F)	1970	-6.7 C (19.9 F)	1
Coldest night (TNn)	-33.3 C (-27.9 F)	1970	-33.3 C (-27.9 F)	1
Wettest day (Rx1day)	286.5 mm (11.3 in)	1968	60.1 mm (2.4 in)	76
Wettest five days (Rx5day)	305.6 mm (12.0 in)	1968	103.9 mm (4.1 in)	75
Longest dry spell (CDD)	55 days	1952	25 days	75

Hottest day (TXx)

The hottest day of the year at Dumont, 1934 to 2011. The record is -6.7 C (19.9 F) in 1970, marked on the chart; the median year is -6.7 C (19.9 F).

Hottest day (TXx) at Dumont by year
Year	Hottest day (TXx)
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	-6.7 C (19.9 F)
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
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
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2011	n/a

Coldest night (TNn)

The coldest night of the year at Dumont, 1934 to 2011. The record is -33.3 C (-27.9 F) in 1970, marked on the chart; the median year is -33.3 C (-27.9 F).

Coldest night (TNn) at Dumont by year
Year	Coldest night (TNn)
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	-33.3 C (-27.9 F)
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
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
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2011	n/a

Wettest day (Rx1day)

The wettest day of the year at Dumont, 1934 to 2011. The record is 286.5 mm (11.3 in) in 1968, marked on the chart; the median year is 60.1 mm (2.4 in).

Wettest day (Rx1day) at Dumont by year
Year	Wettest day (Rx1day)
1934	50.8 mm (2.0 in)
1935	64.8 mm (2.6 in)
1936	76.7 mm (3.0 in)
1937	54.6 mm (2.1 in)
1938	56.1 mm (2.2 in)
1939	58.4 mm (2.3 in)
1940	131.1 mm (5.2 in)
1941	98.8 mm (3.9 in)
1942	78.2 mm (3.1 in)
1943	46.2 mm (1.8 in)
1944	38.9 mm (1.5 in)
1945	78.5 mm (3.1 in)
1946	42.2 mm (1.7 in)
1947	53.6 mm (2.1 in)
1948	55.9 mm (2.2 in)
1949	72.1 mm (2.8 in)
1950	71.4 mm (2.8 in)
1951	140.7 mm (5.5 in)
1952	33.5 mm (1.3 in)
1953	38.6 mm (1.5 in)
1954	58.9 mm (2.3 in)
1955	64.0 mm (2.5 in)
1956	37.1 mm (1.5 in)
1957	29.2 mm (1.1 in)
1958	45.5 mm (1.8 in)
1959	100.6 mm (4.0 in)
1960	58.9 mm (2.3 in)
1961	50.0 mm (2.0 in)
1962	100.3 mm (3.9 in)
1963	60.5 mm (2.4 in)
1964	112.0 mm (4.4 in)
1965	112.0 mm (4.4 in)
1966	59.2 mm (2.3 in)
1967	74.4 mm (2.9 in)
1968	286.5 mm (11.3 in)
1969	64.0 mm (2.5 in)
1970	54.9 mm (2.2 in)
1971	50.5 mm (2.0 in)
1972	45.7 mm (1.8 in)
1973	66.0 mm (2.6 in)
1974	77.5 mm (3.1 in)
1975	33.3 mm (1.3 in)
1976	76.7 mm (3.0 in)
1977	97.3 mm (3.8 in)
1978	100.1 mm (3.9 in)
1979	57.4 mm (2.3 in)
1980	88.1 mm (3.5 in)
1981	54.4 mm (2.1 in)
1982	59.7 mm (2.4 in)
1983	74.4 mm (2.9 in)
1984	55.4 mm (2.2 in)
1985	69.9 mm (2.8 in)
1986	55.9 mm (2.2 in)
1987	65.0 mm (2.6 in)
1988	48.5 mm (1.9 in)
1989	39.4 mm (1.6 in)
1990	133.9 mm (5.3 in)
1991	53.3 mm (2.1 in)
1992	54.9 mm (2.2 in)
1993	50.3 mm (2.0 in)
1994	88.1 mm (3.5 in)
1995	37.6 mm (1.5 in)
1996	50.0 mm (2.0 in)
1997	53.6 mm (2.1 in)
1998	81.5 mm (3.2 in)
1999	91.4 mm (3.6 in)
2000	54.6 mm (2.1 in)
2001	72.9 mm (2.9 in)
2002	92.7 mm (3.6 in)
2003	52.1 mm (2.1 in)
2004	63.5 mm (2.5 in)
2005	68.8 mm (2.7 in)
2006	157.5 mm (6.2 in)
2007	75.7 mm (3.0 in)
2008	91.2 mm (3.6 in)
2011	14.2 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Dumont, 1934 to 2011. The record is 305.6 mm (12.0 in) in 1968, marked on the chart; the median year is 103.9 mm (4.1 in).

Wettest five days (Rx5day) at Dumont by year
Year	Wettest five days (Rx5day)
1934	87.1 mm (3.4 in)
1935	101.9 mm (4.0 in)
1936	131.6 mm (5.2 in)
1937	87.9 mm (3.5 in)
1938	111.9 mm (4.4 in)
1939	92.3 mm (3.6 in)
1940	132.6 mm (5.2 in)
1941	130.6 mm (5.1 in)
1942	104.1 mm (4.1 in)
1943	60.6 mm (2.4 in)
1944	83.8 mm (3.3 in)
1945	108.2 mm (4.3 in)
1946	102.1 mm (4.0 in)
1947	86.2 mm (3.4 in)
1948	65.3 mm (2.6 in)
1949	131.8 mm (5.2 in)
1950	104.6 mm (4.1 in)
1951	151.1 mm (5.9 in)
1952	45.1 mm (1.8 in)
1953	71.6 mm (2.8 in)
1954	113.7 mm (4.5 in)
1955	93.2 mm (3.7 in)
1956	66.5 mm (2.6 in)
1957	63.0 mm (2.5 in)
1958	78.5 mm (3.1 in)
1959	176.1 mm (6.9 in)
1960	78.2 mm (3.1 in)
1961	86.1 mm (3.4 in)
1962	145.0 mm (5.7 in)
1963	96.5 mm (3.8 in)
1964	148.1 mm (5.8 in)
1965	163.9 mm (6.5 in)
1966	103.9 mm (4.1 in)
1967	154.7 mm (6.1 in)
1968	305.6 mm (12.0 in)
1969	136.5 mm (5.4 in)
1970	78.0 mm (3.1 in)
1971	69.3 mm (2.7 in)
1972	104.9 mm (4.1 in)
1973	119.6 mm (4.7 in)
1974	82.3 mm (3.2 in)
1975	50.8 mm (2.0 in)
1976	97.1 mm (3.8 in)
1977	103.1 mm (4.1 in)
1978	121.2 mm (4.8 in)
1979	109.7 mm (4.3 in)
1980	150.1 mm (5.9 in)
1981	65.7 mm (2.6 in)
1982	81.2 mm (3.2 in)
1983	158.0 mm (6.2 in)
1984	68.4 mm (2.7 in)
1985	72.5 mm (2.9 in)
1986	78.6 mm (3.1 in)
1987	119.6 mm (4.7 in)
1988	58.9 mm (2.3 in)
1989	54.9 mm (2.2 in)
1990	149.2 mm (5.9 in)
1991	112.5 mm (4.4 in)
1992	73.5 mm (2.9 in)
1993	88.1 mm (3.5 in)
1994	140.5 mm (5.5 in)
1995	65.6 mm (2.6 in)
1996	141.0 mm (5.6 in)
1997	77.5 mm (3.1 in)
1998	130.8 mm (5.1 in)
1999	121.6 mm (4.8 in)
2000	106.2 mm (4.2 in)
2001	95.5 mm (3.8 in)
2002	93.5 mm (3.7 in)
2003	145.1 mm (5.7 in)
2004	125.9 mm (5.0 in)
2005	126.7 mm (5.0 in)
2006	160.6 mm (6.3 in)
2007	163.6 mm (6.4 in)
2008	204.3 mm (8.0 in)
2011	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Dumont, 1934 to 2011. The record is 55 days in 1952, marked on the chart; the median year is 25 days.

Longest dry spell (CDD) at Dumont by year
Year	Longest dry spell (CDD)
1934	41 days
1935	24 days
1936	25 days
1937	23 days
1938	26 days
1939	22 days
1940	20 days
1941	21 days
1942	38 days
1943	26 days
1944	25 days
1945	30 days
1946	26 days
1947	27 days
1948	41 days
1949	33 days
1950	31 days
1951	17 days
1952	55 days
1953	31 days
1954	25 days
1955	31 days
1956	33 days
1957	16 days
1958	39 days
1959	24 days
1960	19 days
1961	16 days
1962	37 days
1963	21 days
1964	25 days
1965	22 days
1966	26 days
1967	17 days
1968	30 days
1969	28 days
1970	20 days
1971	21 days
1972	29 days
1973	19 days
1974	19 days
1975	24 days
1976	38 days
1977	19 days
1978	28 days
1979	30 days
1980	31 days
1981	26 days
1982	17 days
1983	22 days
1984	29 days
1985	19 days
1986	33 days
1987	49 days
1988	43 days
1989	25 days
1990	20 days
1991	37 days
1992	20 days
1993	22 days
1994	23 days
1995	29 days
1996	26 days
1997	20 days
1998	20 days
1999	23 days
2000	15 days
2001	17 days
2002	36 days
2003	19 days
2004	19 days
2005	16 days
2006	26 days
2007	22 days
2008	12 days
2011	n/a

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

70 years, 1934 to 2007

A day with at least 62.9 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 211.8 mm (8.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Dumont: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	62.9 mm (2.5 in)
5 years	88.9 mm (3.5 in)
10 years	110.6 mm (4.4 in)
25 years	144.5 mm (5.7 in)
50 years	175.3 mm (6.9 in)
100 years	211.8 mm (8.3 in)	Longer than the 70 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, 70 years of values from 1934 to 2007.

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: 286.5 mm (11.3 in) in 1968; 157.5 mm (6.2 in) in 2006; 140.7 mm (5.5 in) in 1951.

Download the Data

Data for Dumont standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dumont 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).