Clarence Weather Records (USC00131528)

Record envelope, standing records and threshold days for Clarence (USC00131528), Iowa, United States, with 45 years of record.

Key Facts for Clarence

Clarence (USC00131528) is a weather station in Iowa, United States at 41.88 latitude and -91.07 longitude, 256 m (840 ft) above sea level.
The station reports from 1934 to 1978, 45 years of record.
1,464 records set at Clarence still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Clarence set a daily record snowfall of 7.6 cm (3.0 in) on 26 March 1978.

About the Station

Location: Iowa, United States, 41.88 latitude, -91.07 longitude.
Elevation: 256 m (840 ft).
Period of record: 1934 to 1978, 45 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 Clarence. 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 Clarence, 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)	-32.2 C (-26.0 F)	n/a	n/a
Feb	16.1 C (61.0 F)	-30.0 C (-22.0 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-22.8 C (-9.0 F)	n/a	n/a
Apr	30.6 C (87.1 F)	-11.7 C (10.9 F)	n/a	n/a
May	39.4 C (102.9 F)	-2.2 C (28.0 F)	n/a	n/a
Jun	38.9 C (102.0 F)	3.3 C (37.9 F)	n/a	n/a
Jul	43.9 C (111.0 F)	7.8 C (46.0 F)	n/a	n/a
Aug	41.1 C (106.0 F)	3.9 C (39.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-8.9 C (16.0 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-18.9 C (-2.0 F)	n/a	n/a
Dec	16.7 C (62.1 F)	-25.0 C (-13.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Clarence still stand. 1936 holds the most, with 168.

All-Time Record Progression

1 new records

1 all-time records were set at Clarence between 4 January 1971 and 4 January 1971. Each dot is a new record.

Wettest Day of Each Month

Jun: 166.9 mm (6.6 in)

The wettest day on record for each calendar month at Clarence. The most was 166.9 mm (6.6 in) on 26 June 1944.

Record daily precipitation for each month at Clarence
Month	Record daily precipitation (mm)	Date
Jan	48.3 mm (1.9 in)	4 January 1971
Feb	34.5 mm (1.4 in)	20 February 1953
Mar	63.8 mm (2.5 in)	25 March 1945
Apr	62.5 mm (2.5 in)	9 April 1973
May	72.6 mm (2.9 in)	10 May 1951
Jun	166.9 mm (6.6 in)	26 June 1944
Jul	104.6 mm (4.1 in)	18 July 1972
Aug	90.7 mm (3.6 in)	31 August 1956
Sep	102.9 mm (4.1 in)	13 September 1961
Oct	56.6 mm (2.2 in)	31 October 1960
Nov	82.3 mm (3.2 in)	17 November 1952
Dec	62.2 mm (2.4 in)	15 December 1971

Period of Record Coverage

1934 to 1947

14 years of record at Clarence, 1934 to 1947. Every year has data for at least 90 percent of its days.

Days with data per year at Clarence
Year	Days with data	Share of year	Complete
1934	347	95%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	365	100%	Yes
1946	363	99%	Yes
1947	334	92%	Yes

Latest Records

Latest records at Clarence
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 March 1978	Clarence, US	daily snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	13 years	13 of 100 (Routine)
25 March 1978	Clarence, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	3 years	1 of 100 (Routine)
1 January 1978	Clarence, US	daily snowfall	17.8 cm (7.0 in)	2.6 cm (1.0 in)	36 years	20 of 100 (Routine)
21 December 1977	Clarence, US	daily rain	6.6 mm (0.26 in)	0.2 mm (0.01 in)	3 years	4 of 100 (Routine)
9 December 1977	Clarence, US	daily snow depth	30.5 cm (12.0 in)	10.2 cm (4.0 in)	8 years	19 of 100 (Routine)
9 December 1977	Clarence, US	daily rain	3.8 mm (0.15 in)	1.3 mm (0.05 in)	23 years	11 of 100 (Routine)
9 December 1977	Clarence, US	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	23 years	2 of 100 (Routine)
8 December 1977	Clarence, US	daily snow depth	27.9 cm (11.0 in)	5.0 cm (2.0 in)	8 years	12 of 100 (Routine)
7 December 1977	Clarence, US	daily snow depth	25.4 cm (10.0 in)	10.2 cm (4.0 in)	12 years	20 of 100 (Routine)
6 December 1977	Clarence, US	daily snow depth	25.4 cm (10.0 in)	10.2 cm (4.0 in)	12 years	20 of 100 (Routine)
6 December 1977	Clarence, US	daily snowfall (Tie)	10.2 cm (4.0 in)	tie	27 years	3 of 100 (Routine)
5 December 1977	Clarence, US	daily snow depth (Tie)	15.2 cm (6.0 in)	tie	12 years	1 of 100 (Routine)
1 December 1977	Clarence, US	daily snowfall (Tie)	5.1 cm (2.0 in)	tie	43 years	4 of 100 (Routine)
28 November 1977	Clarence, US	daily snow depth (Tie)	10.2 cm (4.0 in)	tie	2 years	1 of 100 (Routine)
26 November 1977	Clarence, US	daily snow depth (Tie)	5.1 cm (2.0 in)	tie	36 years	3 of 100 (Routine)
25 November 1977	Clarence, US	daily snowfall	7.6 cm (3.0 in)	5.1 cm (2.0 in)	2 years	14 of 100 (Routine)
25 November 1977	Clarence, US	daily snow depth (Tie)	7.6 cm (3.0 in)	tie	30 years	3 of 100 (Routine)
23 November 1977	Clarence, US	daily snowfall	2.5 cm (1.0 in)	1.7 cm (0.7 in)	40 years	19 of 100 (Routine)
24 September 1977	Clarence, US	daily rain	29.2 mm (1.1 in)	4.8 mm (0.19 in)	40 years	18 of 100 (Routine)
18 September 1977	Clarence, US	daily rain	78.7 mm (3.1 in)	41.9 mm (1.6 in)	8 years	31 of 100 (Routine)

Climate Trend

12 complete years, 1935 to 1946

One stripe for each of 12 complete years at Clarence, 1935 to 1946. Blue stripes are years cooler than the station's own mean of 9.4 C (48.8 F); red stripes are warmer. The coolest year was 1937, at 8.5 C (47.3 F), and the warmest was 1941, at 10.5 C (50.9 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Clarence as warming stripes, 1935 to 1946
Year	Annual mean temperature	Difference from the station mean
1935	8.9 C	-0.43 C
1936	8.9 C	-0.45 C
1937	8.5 C	-0.83 C
1938	10.5 C	+1.15 C
1939	10.2 C	+0.86 C
1940	8.7 C	-0.68 C
1941	10.5 C	+1.15 C
1942	9.3 C	-0.10 C
1943	8.5 C	-0.82 C
1944	9.4 C	+0.01 C
1945	8.6 C	-0.78 C
1946	10.3 C	+0.94 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1934 to 1978

Yearly extremes at Clarence: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	1936	37.2 C (99.0 F)	14
Coldest night (TNn)	-32.2 C (-26.0 F)	1936	-25.0 C (-13.0 F)	14
Wettest day (Rx1day)	166.9 mm (6.6 in)	1944	65.9 mm (2.6 in)	44
Wettest five days (Rx5day)	200.7 mm (7.9 in)	1944	93.5 mm (3.7 in)	44
Longest dry spell (CDD)	63 days	1952	23 days	44

Hottest day (TXx)

The hottest day of the year at Clarence, 1934 to 1978. The record is 43.9 C (111.0 F) in 1936, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Clarence by year
Year	Hottest day (TXx)
1934	39.4 C (102.9 F)
1935	36.1 C (97.0 F)
1936	43.9 C (111.0 F)
1937	37.2 C (99.0 F)
1938	35.0 C (95.0 F)
1939	37.2 C (99.0 F)
1940	40.0 C (104.0 F)
1941	37.8 C (100.0 F)
1942	36.1 C (97.0 F)
1943	36.1 C (97.0 F)
1944	35.6 C (96.1 F)
1945	37.2 C (99.0 F)
1946	35.6 C (96.1 F)
1947	38.9 C (102.0 F)
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

Coldest night (TNn)

The coldest night of the year at Clarence, 1934 to 1978. The record is -32.2 C (-26.0 F) in 1936, marked on the chart; the median year is -25.0 C (-13.0 F).

Coldest night (TNn) at Clarence by year
Year	Coldest night (TNn)
1934	-22.2 C (-8.0 F)
1935	-25.0 C (-13.0 F)
1936	-32.2 C (-26.0 F)
1937	-21.1 C (-6.0 F)
1938	-22.2 C (-8.0 F)
1939	-21.1 C (-6.0 F)
1940	-30.0 C (-22.0 F)
1941	-23.3 C (-9.9 F)
1942	-32.2 C (-26.0 F)
1943	-28.9 C (-20.0 F)
1944	-25.0 C (-13.0 F)
1945	-25.6 C (-14.1 F)
1946	-23.3 C (-9.9 F)
1947	-28.3 C (-18.9 F)
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

Wettest day (Rx1day)

The wettest day of the year at Clarence, 1934 to 1978. The record is 166.9 mm (6.6 in) in 1944, marked on the chart; the median year is 65.9 mm (2.6 in).

Wettest day (Rx1day) at Clarence by year
Year	Wettest day (Rx1day)
1934	61.5 mm (2.4 in)
1935	64.5 mm (2.5 in)
1936	49.5 mm (1.9 in)
1937	54.4 mm (2.1 in)
1938	90.2 mm (3.6 in)
1939	52.8 mm (2.1 in)
1940	50.5 mm (2.0 in)
1941	102.1 mm (4.0 in)
1942	43.4 mm (1.7 in)
1943	75.9 mm (3.0 in)
1944	166.9 mm (6.6 in)
1945	63.8 mm (2.5 in)
1946	63.8 mm (2.5 in)
1947	44.2 mm (1.7 in)
1949	86.6 mm (3.4 in)
1950	52.8 mm (2.1 in)
1951	72.6 mm (2.9 in)
1952	89.2 mm (3.5 in)
1953	40.6 mm (1.6 in)
1954	45.0 mm (1.8 in)
1955	49.3 mm (1.9 in)
1956	90.7 mm (3.6 in)
1957	69.6 mm (2.7 in)
1958	79.0 mm (3.1 in)
1959	65.3 mm (2.6 in)
1960	56.6 mm (2.2 in)
1961	102.9 mm (4.1 in)
1962	52.6 mm (2.1 in)
1963	80.8 mm (3.2 in)
1964	45.5 mm (1.8 in)
1965	78.5 mm (3.1 in)
1966	66.8 mm (2.6 in)
1967	71.4 mm (2.8 in)
1968	82.8 mm (3.3 in)
1969	52.8 mm (2.1 in)
1970	76.2 mm (3.0 in)
1971	66.5 mm (2.6 in)
1972	104.6 mm (4.1 in)
1973	84.3 mm (3.3 in)
1974	69.1 mm (2.7 in)
1975	33.8 mm (1.3 in)
1976	33.5 mm (1.3 in)
1977	78.7 mm (3.1 in)
1978	48.0 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Clarence, 1934 to 1978. The record is 200.7 mm (7.9 in) in 1944, marked on the chart; the median year is 93.5 mm (3.7 in).

Wettest five days (Rx5day) at Clarence by year
Year	Wettest five days (Rx5day)
1934	81.1 mm (3.2 in)
1935	90.9 mm (3.6 in)
1936	74.7 mm (2.9 in)
1937	69.1 mm (2.7 in)
1938	138.0 mm (5.4 in)
1939	75.7 mm (3.0 in)
1940	60.5 mm (2.4 in)
1941	115.3 mm (4.5 in)
1942	103.6 mm (4.1 in)
1943	97.2 mm (3.8 in)
1944	200.7 mm (7.9 in)
1945	72.2 mm (2.8 in)
1946	89.6 mm (3.5 in)
1947	80.7 mm (3.2 in)
1949	112.5 mm (4.4 in)
1950	99.0 mm (3.9 in)
1951	88.9 mm (3.5 in)
1952	123.2 mm (4.9 in)
1953	94.0 mm (3.7 in)
1954	84.6 mm (3.3 in)
1955	61.5 mm (2.4 in)
1956	97.8 mm (3.9 in)
1957	116.9 mm (4.6 in)
1958	114.9 mm (4.5 in)
1959	91.7 mm (3.6 in)
1960	94.7 mm (3.7 in)
1961	164.6 mm (6.5 in)
1962	71.8 mm (2.8 in)
1963	105.2 mm (4.1 in)
1964	81.9 mm (3.2 in)
1965	146.6 mm (5.8 in)
1966	79.9 mm (3.1 in)
1967	102.6 mm (4.0 in)
1968	123.6 mm (4.9 in)
1969	93.0 mm (3.7 in)
1970	161.7 mm (6.4 in)
1971	89.1 mm (3.5 in)
1972	139.9 mm (5.5 in)
1973	107.7 mm (4.2 in)
1974	188.5 mm (7.4 in)
1975	39.4 mm (1.6 in)
1976	57.1 mm (2.2 in)
1977	87.6 mm (3.4 in)
1978	69.8 mm (2.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Clarence, 1934 to 1978. The record is 63 days in 1952, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Clarence by year
Year	Longest dry spell (CDD)
1934	33 days
1935	17 days
1936	22 days
1937	15 days
1938	24 days
1939	30 days
1940	20 days
1941	17 days
1942	35 days
1943	27 days
1944	25 days
1945	21 days
1946	25 days
1947	22 days
1949	21 days
1950	29 days
1951	20 days
1952	63 days
1953	24 days
1954	29 days
1955	29 days
1956	31 days
1957	29 days
1958	26 days
1959	17 days
1960	14 days
1961	16 days
1962	19 days
1963	20 days
1964	36 days
1965	20 days
1966	26 days
1967	28 days
1968	26 days
1969	29 days
1970	15 days
1971	23 days
1972	15 days
1973	16 days
1974	15 days
1975	17 days
1976	26 days
1977	17 days
1978	11 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

41 years, 1934 to 1977

A day with at least 64.9 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 142.9 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Clarence: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	64.9 mm (2.6 in)
5 years	85.8 mm (3.4 in)
10 years	99.6 mm (3.9 in)
25 years	117.0 mm (4.6 in)
50 years	130.0 mm (5.1 in)	Longer than the 41 years of record
100 years	142.9 mm (5.6 in)	Longer than the 41 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, 41 years of values from 1934 to 1977.

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: 166.9 mm (6.6 in) in 1944; 104.6 mm (4.1 in) in 1972; 102.9 mm (4.1 in) in 1961.

Download the Data

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