Peterson Weather Records (USC00136590)

Record envelope, standing records and threshold days for Peterson (USC00136590), Iowa, United States, with 41 years of record.

Key Facts for Peterson

Peterson (USC00136590) is a weather station in Iowa, United States at 42.92 latitude and -95.34 longitude, 375 m (1,230 ft) above sea level.
The station reports from 1953 to 1993, 41 years of record.
12 records set at Peterson still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Peterson set a daily record precipitation of 17.0 mm (0.7 in) on 25 November 1993.

About the Station

Location: Iowa, United States, 42.92 latitude, -95.34 longitude.
Elevation: 375 m (1,230 ft).
Period of record: 1953 to 1993, 41 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 Peterson. 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 Peterson, 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	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	33.3 C (91.9 F)	8.9 C (48.0 F)	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

12 standing records

12 records at Peterson still stand. 1981 holds the most, with 12.

Wettest Day of Each Month

Aug: 244.1 mm (9.6 in)

The wettest day on record for each calendar month at Peterson. The most was 244.1 mm (9.6 in) on 23 August 1973.

Record daily precipitation for each month at Peterson
Month	Record daily precipitation (mm)	Date
Jan	27.9 mm (1.1 in)	23 January 1992
Feb	54.4 mm (2.1 in)	19 February 1971
Mar	139.7 mm (5.5 in)	27 March 1983
Apr	57.4 mm (2.3 in)	27 April 1975
May	78.7 mm (3.1 in)	21 May 1960
Jun	115.1 mm (4.5 in)	25 June 1969
Jul	97.5 mm (3.8 in)	6 July 1978
Aug	244.1 mm (9.6 in)	23 August 1973
Sep	86.4 mm (3.4 in)	8 September 1964
Oct	58.7 mm (2.3 in)	31 October 1979
Nov	67.6 mm (2.7 in)	9 November 1977
Dec	44.5 mm (1.8 in)	28 December 1982

Period of Record Coverage

1981 to 1981

1 years of record at Peterson, 1981 to 1981. 1 years have data for under 90 percent of days and are left out of rankings: 1981.

Latest Records

Latest records at Peterson
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 November 1993	Peterson, US	daily rain	17.0 mm (0.7 in)	13.7 mm (0.5 in)	16 years	20 of 100 (Routine)
9 October 1993	Peterson, US	daily rain (Tie)	39.4 mm (1.6 in)	tie	0 years	1 of 100 (Routine)
30 August 1993	Peterson, US	daily rain	79.5 mm (3.1 in)	49.5 mm (1.9 in)	11 years	32 of 100 (Routine)
17 July 1993	Peterson, US	daily rain	72.4 mm (2.9 in)	46.5 mm (1.8 in)	20 years	42 of 100 (Notable)
13 July 1993	Peterson, US	daily rain	30.5 mm (1.2 in)	16.5 mm (0.6 in)	31 years	24 of 100 (Routine)
13 June 1993	Peterson, US	daily rain	102.9 mm (4.1 in)	70.6 mm (2.8 in)	12 years	47 of 100 (Notable)
2 June 1993	Peterson, US	daily rain	15.7 mm (0.6 in)	3.0 mm (0.12 in)	12 years	9 of 100 (Routine)
30 May 1993	Peterson, US	daily rain	39.4 mm (1.6 in)	5.1 mm (0.20 in)	12 years	11 of 100 (Routine)
7 May 1993	Peterson, US	daily rain	20.3 mm (0.8 in)	8.1 mm (0.32 in)	8 years	12 of 100 (Routine)
20 April 1993	Peterson, US	daily rain	49.5 mm (1.9 in)	28.4 mm (1.1 in)	34 years	42 of 100 (Notable)
31 March 1993	Peterson, US	daily rain	13.7 mm (0.5 in)	0.5 mm (0.02 in)	8 years	6 of 100 (Routine)
22 March 1993	Peterson, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	39 years	26 of 100 (Routine)
26 February 1993	Peterson, US	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	31 years	24 of 100 (Routine)
13 February 1993	Peterson, US	daily rain	4.3 mm (0.17 in)	1.5 mm (0.06 in)	20 years	11 of 100 (Routine)
13 February 1993	Peterson, US	daily snowfall	5.1 cm (2.0 in)	1.3 cm (0.5 in)	20 years	11 of 100 (Routine)
11 February 1993	Peterson, US	daily rain	5.8 mm (0.23 in)	4.5 mm (0.18 in)	12 years	12 of 100 (Routine)
12 January 1993	Peterson, US	daily rain	16.0 mm (0.6 in)	12.4 mm (0.5 in)	29 years	20 of 100 (Routine)
12 January 1993	Peterson, US	daily snowfall	20.3 cm (8.0 in)	11.4 cm (4.5 in)	14 years	32 of 100 (Routine)
6 January 1993	Peterson, US	daily snowfall	5.1 cm (2.0 in)	3.8 cm (1.5 in)	19 years	17 of 100 (Routine)
9 December 1992	Peterson, US	daily snowfall	5.1 cm (2.0 in)	2.6 cm (1.0 in)	31 years	18 of 100 (Routine)

Extremes by Year

1953 to 1993

Yearly extremes at Peterson: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.3 C (91.9 F)	1981	33.3 C (91.9 F)	1
Coldest night (TNn)	8.9 C (48.0 F)	1981	8.9 C (48.0 F)	1
Wettest day (Rx1day)	244.1 mm (9.6 in)	1973	57.4 mm (2.3 in)	41
Wettest five days (Rx5day)	249.9 mm (9.8 in)	1973	95.8 mm (3.8 in)	41
Longest dry spell (CDD)	58 days	1974	29 days	41

Hottest day (TXx)

The hottest day of the year at Peterson, 1953 to 1993. The record is 33.3 C (91.9 F) in 1981, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Peterson by year
Year	Hottest day (TXx)
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	n/a
1981	33.3 C (91.9 F)
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

Coldest night (TNn)

The coldest night of the year at Peterson, 1953 to 1993. The record is 8.9 C (48.0 F) in 1981, marked on the chart; the median year is 8.9 C (48.0 F).

Coldest night (TNn) at Peterson by year
Year	Coldest night (TNn)
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	n/a
1981	8.9 C (48.0 F)
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

Wettest day (Rx1day)

The wettest day of the year at Peterson, 1953 to 1993. The record is 244.1 mm (9.6 in) in 1973, marked on the chart; the median year is 57.4 mm (2.3 in).

Wettest day (Rx1day) at Peterson by year
Year	Wettest day (Rx1day)
1953	14.7 mm (0.6 in)
1954	86.6 mm (3.4 in)
1955	44.7 mm (1.8 in)
1956	48.3 mm (1.9 in)
1957	58.4 mm (2.3 in)
1958	31.2 mm (1.2 in)
1959	61.2 mm (2.4 in)
1960	78.7 mm (3.1 in)
1961	30.0 mm (1.2 in)
1962	67.3 mm (2.6 in)
1963	34.3 mm (1.4 in)
1964	86.4 mm (3.4 in)
1965	57.2 mm (2.3 in)
1966	37.1 mm (1.5 in)
1967	45.2 mm (1.8 in)
1968	81.8 mm (3.2 in)
1969	115.1 mm (4.5 in)
1970	55.4 mm (2.2 in)
1971	64.5 mm (2.5 in)
1972	71.9 mm (2.8 in)
1973	244.1 mm (9.6 in)
1974	57.4 mm (2.3 in)
1975	59.7 mm (2.4 in)
1976	68.3 mm (2.7 in)
1977	67.6 mm (2.7 in)
1978	97.5 mm (3.8 in)
1979	58.7 mm (2.3 in)
1980	56.6 mm (2.2 in)
1981	45.7 mm (1.8 in)
1982	51.1 mm (2.0 in)
1983	139.7 mm (5.5 in)
1984	54.9 mm (2.2 in)
1985	52.6 mm (2.1 in)
1986	51.3 mm (2.0 in)
1987	50.8 mm (2.0 in)
1988	127.0 mm (5.0 in)
1989	49.8 mm (2.0 in)
1990	48.3 mm (1.9 in)
1991	57.2 mm (2.3 in)
1992	77.5 mm (3.1 in)
1993	102.9 mm (4.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Peterson, 1953 to 1993. The record is 249.9 mm (9.8 in) in 1973, marked on the chart; the median year is 95.8 mm (3.8 in).

Wettest five days (Rx5day) at Peterson by year
Year	Wettest five days (Rx5day)
1953	27.2 mm (1.1 in)
1954	143.1 mm (5.6 in)
1955	51.6 mm (2.0 in)
1956	62.1 mm (2.4 in)
1957	85.9 mm (3.4 in)
1958	71.1 mm (2.8 in)
1959	106.1 mm (4.2 in)
1960	124.4 mm (4.9 in)
1961	59.4 mm (2.3 in)
1962	101.1 mm (4.0 in)
1963	59.7 mm (2.4 in)
1964	148.3 mm (5.8 in)
1965	78.7 mm (3.1 in)
1966	49.3 mm (1.9 in)
1967	67.6 mm (2.7 in)
1968	96.5 mm (3.8 in)
1969	153.7 mm (6.1 in)
1970	126.3 mm (5.0 in)
1971	111.3 mm (4.4 in)
1972	86.9 mm (3.4 in)
1973	249.9 mm (9.8 in)
1974	92.6 mm (3.6 in)
1975	123.2 mm (4.9 in)
1976	68.3 mm (2.7 in)
1977	77.3 mm (3.0 in)
1978	133.5 mm (5.3 in)
1979	75.4 mm (3.0 in)
1980	67.1 mm (2.6 in)
1981	93.6 mm (3.7 in)
1982	103.2 mm (4.1 in)
1983	156.4 mm (6.2 in)
1984	102.7 mm (4.0 in)
1985	95.8 mm (3.8 in)
1986	92.6 mm (3.6 in)
1987	117.6 mm (4.6 in)
1988	129.6 mm (5.1 in)
1989	93.3 mm (3.7 in)
1990	119.1 mm (4.7 in)
1991	72.2 mm (2.8 in)
1992	141.0 mm (5.6 in)
1993	140.8 mm (5.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Peterson, 1953 to 1993. The record is 58 days in 1974, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Peterson by year
Year	Longest dry spell (CDD)
1953	16 days
1954	34 days
1955	25 days
1956	29 days
1957	20 days
1958	44 days
1959	18 days
1960	34 days
1961	30 days
1962	48 days
1963	47 days
1964	33 days
1965	21 days
1966	25 days
1967	43 days
1968	41 days
1969	25 days
1970	33 days
1971	32 days
1972	23 days
1973	17 days
1974	58 days
1975	27 days
1976	42 days
1977	25 days
1978	19 days
1979	26 days
1980	30 days
1981	45 days
1982	29 days
1983	22 days
1984	29 days
1985	26 days
1986	32 days
1987	38 days
1988	25 days
1989	37 days
1990	25 days
1991	23 days
1992	22 days
1993	39 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

38 years, 1954 to 1992

A day with at least 56.7 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 221.2 mm (8.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Peterson: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	56.7 mm (2.2 in)
5 years	80.0 mm (3.1 in)
10 years	101.5 mm (4.0 in)
25 years	138.3 mm (5.4 in)
50 years	174.7 mm (6.9 in)	Longer than the 38 years of record
100 years	221.2 mm (8.7 in)	Longer than the 38 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, 38 years of values from 1954 to 1992.

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: 244.1 mm (9.6 in) in 1973; 139.7 mm (5.5 in) in 1983; 127.0 mm (5.0 in) in 1988.

Download the Data

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