Ortonville Weather Records (USC00216224)

Record envelope, standing records and threshold days for Ortonville (USC00216224), Minnesota, United States, with 92 years of record.

Key Facts for Ortonville

Ortonville (USC00216224) is a weather station in Minnesota, United States at 45.30 latitude and -96.45 longitude, 299 m (981 ft) above sea level.
The station reports from 1892 to 1983, 92 years of record.
2 records set at Ortonville still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ortonville set a daily record precipitation of 9.9 mm (0.39 in) on 7 March 1983.

About the Station

Location: Minnesota, United States, 45.30 latitude, -96.45 longitude.
Elevation: 299 m (981 ft).
Period of record: 1892 to 1983, 92 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 Ortonville. 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 Ortonville, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	-16.7 C (1.9 F)	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

2 standing records

2 records at Ortonville still stand. 1980 holds the most, with 2.

Wettest Day of Each Month

Aug: 113.5 mm (4.5 in)

The wettest day on record for each calendar month at Ortonville. The most was 113.5 mm (4.5 in) on 18 August 1949.

Record daily precipitation for each month at Ortonville
Month	Record daily precipitation (mm)	Date
Jan	21.1 mm (0.8 in)	27 January 1944
Feb	44.7 mm (1.8 in)	6 February 1946
Mar	55.9 mm (2.2 in)	12 March 1977
Apr	52.1 mm (2.1 in)	7 April 1893
May	70.1 mm (2.8 in)	1 May 1942
Jun	80.5 mm (3.2 in)	28 June 1952
Jul	95.5 mm (3.8 in)	20 July 1948
Aug	113.5 mm (4.5 in)	18 August 1949
Sep	63.8 mm (2.5 in)	19 September 1963
Oct	71.9 mm (2.8 in)	31 October 1979
Nov	50.8 mm (2.0 in)	9 November 1970
Dec	35.6 mm (1.4 in)	28 December 1959

Latest Records

Latest records at Ortonville
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 March 1983	Ortonville, US	daily rain	9.9 mm (0.39 in)	7.4 mm (0.29 in)	89 years	20 of 100 (Routine)
6 March 1983	Ortonville, US	daily rain	14.0 mm (0.6 in)	3.6 mm (0.14 in)	36 years	20 of 100 (Routine)
10 November 1982	Ortonville, US	daily rain	14.0 mm (0.6 in)	3.8 mm (0.15 in)	41 years	20 of 100 (Routine)
9 October 1982	Ortonville, US	daily rain	17.3 mm (0.7 in)	1.6 mm (0.06 in)	13 years	14 of 100 (Routine)
15 September 1982	Ortonville, US	daily rain	15.2 mm (0.6 in)	1.0 mm (0.04 in)	12 years	13 of 100 (Routine)
12 September 1982	Ortonville, US	daily rain	13.2 mm (0.5 in)	1.5 mm (0.06 in)	39 years	20 of 100 (Routine)
20 March 1982	Ortonville, US	daily rain	26.7 mm (1.1 in)	3.3 mm (0.13 in)	17 years	18 of 100 (Routine)
22 July 1981	Ortonville, US	daily rain	15.0 mm (0.6 in)	6.1 mm (0.24 in)	3 years	13 of 100 (Routine)
12 July 1981	Ortonville, US	daily rain	23.9 mm (0.9 in)	7.6 mm (0.30 in)	34 years	20 of 100 (Routine)
13 June 1981	Ortonville, US	daily rain	67.1 mm (2.6 in)	49.8 mm (2.0 in)	11 years	52 of 100 (Notable)
28 May 1981	Ortonville, US	daily rain	31.2 mm (1.2 in)	16.2 mm (0.6 in)	24 years	30 of 100 (Routine)
29 March 1981	Ortonville, US	daily rain	17.3 mm (0.7 in)	7.6 mm (0.30 in)	16 years	20 of 100 (Routine)
16 July 1980	Ortonville, US	daily rain	42.7 mm (1.7 in)	20.9 mm (0.8 in)	37 years	35 of 100 (Notable)
5 June 1980	Ortonville, US	daily rain	33.5 mm (1.3 in)	7.3 mm (0.29 in)	13 years	16 of 100 (Routine)
5 February 1980	Ortonville, US	daily rain (Tie)	8.1 mm (0.32 in)	tie	28 years	4 of 100 (Routine)
5 January 1980	Ortonville, US	daily rain	1.8 mm (0.07 in)	1.3 mm (0.05 in)	34 years	20 of 100 (Routine)
31 October 1979	Ortonville, US	monthly rain	71.9 mm (2.8 in)	2.0 mm (0.08 in)	33 years	28 of 100 (Routine)
19 October 1979	Ortonville, US	daily rain	16.5 mm (0.6 in)	4.3 mm (0.17 in)	29 years	20 of 100 (Routine)
20 June 1979	Ortonville, US	daily rain	50.8 mm (2.0 in)	6.1 mm (0.24 in)	25 years	19 of 100 (Routine)
12 April 1979	Ortonville, US	daily rain	34.3 mm (1.4 in)	12.7 mm (0.5 in)	6 years	25 of 100 (Routine)

Extremes by Year

1892 to 1983

Yearly extremes at Ortonville: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Coldest night (TNn)	-16.7 C (1.9 F)	1980	-16.7 C (1.9 F)	1
Wettest day (Rx1day)	113.5 mm (4.5 in)	1949	52.6 mm (2.1 in)	47
Wettest five days (Rx5day)	180.1 mm (7.1 in)	1953	77.0 mm (3.0 in)	47
Longest dry spell (CDD)	70 days	1980	31 days	47

Coldest night (TNn)

The coldest night of the year at Ortonville, 1892 to 1983. The record is -16.7 C (1.9 F) in 1980, marked on the chart; the median year is -16.7 C (1.9 F).

Coldest night (TNn) at Ortonville by year
Year	Coldest night (TNn)
1892	n/a
1893	n/a
1894	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
1980	-16.7 C (1.9 F)
1981	n/a
1982	n/a
1983	n/a

Wettest day (Rx1day)

The wettest day of the year at Ortonville, 1892 to 1983. The record is 113.5 mm (4.5 in) in 1949, marked on the chart; the median year is 52.6 mm (2.1 in).

Wettest day (Rx1day) at Ortonville by year
Year	Wettest day (Rx1day)
1892	55.9 mm (2.2 in)
1893	52.1 mm (2.1 in)
1894	53.6 mm (2.1 in)
1940	28.4 mm (1.1 in)
1941	39.9 mm (1.6 in)
1942	70.1 mm (2.8 in)
1943	47.8 mm (1.9 in)
1944	37.6 mm (1.5 in)
1945	52.6 mm (2.1 in)
1946	69.9 mm (2.8 in)
1947	29.5 mm (1.2 in)
1948	95.5 mm (3.8 in)
1949	113.5 mm (4.5 in)
1950	49.3 mm (1.9 in)
1951	45.7 mm (1.8 in)
1952	80.5 mm (3.2 in)
1953	69.3 mm (2.7 in)
1954	46.5 mm (1.8 in)
1955	85.6 mm (3.4 in)
1956	28.2 mm (1.1 in)
1957	82.0 mm (3.2 in)
1958	22.9 mm (0.9 in)
1959	54.6 mm (2.1 in)
1960	41.7 mm (1.6 in)
1961	36.1 mm (1.4 in)
1962	31.8 mm (1.3 in)
1963	63.8 mm (2.5 in)
1964	81.3 mm (3.2 in)
1965	59.2 mm (2.3 in)
1966	64.0 mm (2.5 in)
1967	35.6 mm (1.4 in)
1968	39.6 mm (1.6 in)
1969	58.9 mm (2.3 in)
1970	50.8 mm (2.0 in)
1971	72.1 mm (2.8 in)
1972	62.7 mm (2.5 in)
1973	56.1 mm (2.2 in)
1974	46.5 mm (1.8 in)
1975	40.1 mm (1.6 in)
1976	30.5 mm (1.2 in)
1977	55.9 mm (2.2 in)
1978	63.5 mm (2.5 in)
1979	71.9 mm (2.8 in)
1980	42.7 mm (1.7 in)
1981	67.1 mm (2.6 in)
1982	34.0 mm (1.3 in)
1983	14.0 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ortonville, 1892 to 1983. The record is 180.1 mm (7.1 in) in 1953, marked on the chart; the median year is 77.0 mm (3.0 in).

Wettest five days (Rx5day) at Ortonville by year
Year	Wettest five days (Rx5day)
1892	77.0 mm (3.0 in)
1893	68.6 mm (2.7 in)
1894	86.6 mm (3.4 in)
1940	36.8 mm (1.4 in)
1941	47.2 mm (1.9 in)
1942	115.8 mm (4.6 in)
1943	85.1 mm (3.4 in)
1944	73.4 mm (2.9 in)
1945	99.5 mm (3.9 in)
1946	83.6 mm (3.3 in)
1947	55.6 mm (2.2 in)
1948	101.3 mm (4.0 in)
1949	113.5 mm (4.5 in)
1950	56.9 mm (2.2 in)
1951	55.8 mm (2.2 in)
1952	97.1 mm (3.8 in)
1953	180.1 mm (7.1 in)
1954	76.9 mm (3.0 in)
1955	100.9 mm (4.0 in)
1956	55.4 mm (2.2 in)
1957	104.6 mm (4.1 in)
1958	34.3 mm (1.4 in)
1959	60.4 mm (2.4 in)
1960	98.1 mm (3.9 in)
1961	62.5 mm (2.5 in)
1962	72.4 mm (2.9 in)
1963	84.9 mm (3.3 in)
1964	94.0 mm (3.7 in)
1965	90.9 mm (3.6 in)
1966	92.7 mm (3.6 in)
1967	82.8 mm (3.3 in)
1968	60.6 mm (2.4 in)
1969	68.3 mm (2.7 in)
1970	68.6 mm (2.7 in)
1971	75.2 mm (3.0 in)
1972	65.7 mm (2.6 in)
1973	87.7 mm (3.5 in)
1974	83.4 mm (3.3 in)
1975	60.1 mm (2.4 in)
1976	34.3 mm (1.4 in)
1977	79.0 mm (3.1 in)
1978	64.5 mm (2.5 in)
1979	78.5 mm (3.1 in)
1980	89.5 mm (3.5 in)
1981	86.4 mm (3.4 in)
1982	54.9 mm (2.2 in)
1983	34.9 mm (1.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ortonville, 1892 to 1983. The record is 70 days in 1980, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at Ortonville by year
Year	Longest dry spell (CDD)
1892	39 days
1893	34 days
1894	49 days
1940	17 days
1941	35 days
1942	46 days
1943	37 days
1944	31 days
1945	30 days
1946	21 days
1947	16 days
1948	20 days
1949	25 days
1950	31 days
1951	22 days
1952	56 days
1953	25 days
1954	29 days
1955	27 days
1956	22 days
1957	30 days
1958	30 days
1959	61 days
1960	32 days
1961	32 days
1962	31 days
1963	26 days
1964	47 days
1965	23 days
1966	25 days
1967	24 days
1968	22 days
1969	33 days
1970	57 days
1971	35 days
1972	29 days
1973	38 days
1974	43 days
1975	38 days
1976	47 days
1977	20 days
1978	52 days
1979	35 days
1980	70 days
1981	35 days
1982	41 days
1983	31 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

40 years, 1892 to 1982

A day with at least 53.4 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 104.5 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Ortonville: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	53.4 mm (2.1 in)
5 years	69.3 mm (2.7 in)
10 years	78.8 mm (3.1 in)
25 years	89.9 mm (3.5 in)
50 years	97.5 mm (3.8 in)	Longer than the 40 years of record
100 years	104.5 mm (4.1 in)	Longer than the 40 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, 40 years of values from 1892 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: 113.5 mm (4.5 in) in 1949; 85.6 mm (3.4 in) in 1955; 81.3 mm (3.2 in) in 1964.

Download the Data

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