Washta Weather Records (USC00138693)

Record envelope, standing records and threshold days for Washta (USC00138693), Iowa, United States, with 123 years of record.

Key Facts for Washta

Washta (USC00138693) is a weather station in Iowa, United States at 42.57 latitude and -95.72 longitude, 351 m (1,150 ft) above sea level.
The station reports from 1897 to 2019, 123 years of record.
1,464 records set at Washta still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Washta set a daily record snowfall of 0.5 cm (0.2 in) on 2 April 2019.

About the Station

Location: Iowa, United States, 42.57 latitude, -95.72 longitude.
Elevation: 351 m (1,150 ft).
Period of record: 1897 to 2019, 123 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Washta. 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 Washta, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.1 C (61.0 F)	-43.9 C (-47.0 F)	n/a	n/a
Feb	20.0 C (68.0 F)	-37.8 C (-36.0 F)	n/a	n/a
Mar	30.0 C (86.0 F)	-29.4 C (-20.9 F)	n/a	n/a
Apr	35.6 C (96.1 F)	-19.4 C (-2.9 F)	n/a	n/a
May	37.8 C (100.0 F)	-10.6 C (12.9 F)	n/a	n/a
Jun	41.7 C (107.1 F)	-0.6 C (30.9 F)	n/a	n/a
Jul	41.1 C (106.0 F)	4.4 C (39.9 F)	n/a	n/a
Aug	41.7 C (107.1 F)	0.0 C (32.0 F)	n/a	n/a
Sep	40.6 C (105.1 F)	-6.7 C (19.9 F)	n/a	n/a
Oct	33.9 C (93.0 F)	-25.0 C (-13.0 F)	n/a	n/a
Nov	26.7 C (80.1 F)	-31.7 C (-25.1 F)	n/a	n/a
Dec	20.6 C (69.1 F)	-40.0 C (-40.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Washta still stand. 1931 holds the most, with 68.

Standing records at Washta by the year they were set
Year set	Standing records
1905	48
1906	47
1907	46
1908	35
1909	55
1910	45
1911	55
1912	35
1913	59
1914	49
1915	37
1916	32
1917	34
1918	49
1919	32
1920	27
1921	40
1922	31
1923	44
1924	43
1925	38
1926	37
1927	37
1928	37
1929	34
1930	61
1931	68
1932	25
1933	28
1981	2
1989	13
1990	15
1991	18
1992	22
1993	17
1994	19
2012	3
2013	7
2014	39
2015	28
2016	19
2017	14
2018	34
2019	6

All-Time Record Progression

2 new records

2 all-time records were set at Washta between 21 February 1993 and 17 August 2015. Each dot is a new record.

When Washta set new all-time records
Date	Kind	Detail
1993-02-21	Record daily snowfall	Record daily snowfall 35.6 cm (14.0 in)
2015-08-17	Record daily precipitation	Record daily precipitation 144.0 mm (5.7 in)

Wettest Day of Each Month

Aug: 144.0 mm (5.7 in)

The wettest day on record for each calendar month at Washta. The most was 144.0 mm (5.7 in) on 17 August 2015.

Record daily precipitation for each month at Washta
Month	Record daily precipitation (mm)	Date
Jan	26.4 mm (1.0 in)	27 January 1954
Feb	30.0 mm (1.2 in)	20 February 1954
Mar	46.7 mm (1.8 in)	24 March 2016
Apr	113.0 mm (4.4 in)	21 April 1932
May	81.5 mm (3.2 in)	19 May 1990
Jun	112.0 mm (4.4 in)	15 June 2014
Jul	116.8 mm (4.6 in)	15 July 1900
Aug	144.0 mm (5.7 in)	17 August 2015
Sep	117.6 mm (4.6 in)	18 September 1926
Oct	55.9 mm (2.2 in)	7 October 1992
Nov	55.9 mm (2.2 in)	10 November 1919
Dec	35.6 mm (1.4 in)	19 December 1902

Period of Record Coverage

1905 to 2019

39 years of record at Washta, 1905 to 2019. 12 years have data for under 90 percent of days and are left out of rankings: 1905, 1916, 1933, 1956, 1981, 2012, 2013, 2014 and others.

Days with data per year at Washta
Year	Days with data	Share of year	Complete
1905	303	83%	No
1906	358	98%	Yes
1907	361	99%	Yes
1908	363	99%	Yes
1909	365	100%	Yes
1910	363	99%	Yes
1911	362	99%	Yes
1912	337	92%	Yes
1913	362	99%	Yes
1914	361	99%	Yes
1915	363	99%	Yes
1916	320	87%	No
1917	331	91%	Yes
1918	362	99%	Yes
1919	362	99%	Yes
1920	355	97%	Yes
1921	364	100%	Yes
1922	364	100%	Yes
1923	363	99%	Yes
1924	359	98%	Yes
1925	331	91%	Yes
1926	361	99%	Yes
1927	361	99%	Yes
1928	363	99%	Yes
1929	364	100%	Yes
1930	365	100%	Yes
1931	363	99%	Yes
1932	362	99%	Yes
1933	206	56%	No
1956	20	5%	No
1981	30	8%	No
2012	61	17%	No
2013	118	32%	No
2014	301	82%	No
2015	354	97%	Yes
2016	305	83%	No
2017	78	21%	No
2018	310	85%	No
2019	99	27%	No

Latest Records

Latest records at Washta
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 April 2019	Washta, US	daily snowfall	0.5 cm (0.2 in)	0.5 cm (0.2 in)	119 years	20 of 100 (Routine)
14 March 2019	Washta, US	daily rain	27.7 mm (1.1 in)	8.6 mm (0.34 in)	119 years	51 of 100 (Notable)
10 March 2019	Washta, US	daily rain	30.0 mm (1.2 in)	14.8 mm (0.6 in)	117 years	59 of 100 (Notable)
8 March 2019	Washta, US	daily snowfall	5.3 cm (2.1 in)	5.3 cm (2.1 in)	120 years	49 of 100 (Notable)
5 March 2019	Washta, US	daily low min (Tie)	-23.3 C (-9.9 F)	tie	4 years	2 of 100 (Routine)
28 February 2019	Washta, US	daily low max (Tie)	-12.8 C (9.0 F)	tie	100 years	10 of 100 (Routine)
26 February 2019	Washta, US	daily low max	-13.3 C (8.1 F)	2.2 C (4.0 F)	4 years	14 of 100 (Routine)
25 February 2019	Washta, US	daily low max	-11.1 C (12.0 F)	3.3 C (5.9 F)	4 years	15 of 100 (Routine)
24 February 2019	Washta, US	daily snowfall	19.6 cm (7.7 in)	17.1 cm (6.7 in)	92 years	65 of 100 (Major)
24 February 2019	Washta, US	daily rain	19.1 mm (0.8 in)	14.0 mm (0.6 in)	92 years	20 of 100 (Routine)
20 February 2019	Washta, US	daily snowfall	10.2 cm (4.0 in)	7.2 cm (2.8 in)	3 years	22 of 100 (Routine)
17 February 2019	Washta, US	daily snowfall	13.2 cm (5.2 in)	5.6 cm (2.2 in)	115 years	49 of 100 (Notable)
17 February 2019	Washta, US	daily rain	10.9 mm (0.4 in)	3.3 mm (0.13 in)	115 years	20 of 100 (Routine)
12 February 2019	Washta, US	daily snowfall	9.4 cm (3.7 in)	6.1 cm (2.4 in)	3 years	20 of 100 (Routine)
7 February 2019	Washta, US	daily snowfall	3.3 cm (1.3 in)	0.8 cm (0.3 in)	113 years	20 of 100 (Routine)
3 February 2019	Washta, US	daily high min	3.9 C (39.0 F)	3.3 C (5.9 F)	92 years	41 of 100 (Notable)
30 January 2019	Washta, US	daily low max (Tie)	-17.2 C (1.0 F)	tie	109 years	10 of 100 (Routine)
15 January 2019	Washta, US	daily high min (Tie)	-1.7 C (28.9 F)	tie	104 years	10 of 100 (Routine)
7 January 2019	Washta, US	daily high min	2.2 C (36.0 F)	3.3 C (5.9 F)	91 years	41 of 100 (Notable)
6 January 2019	Washta, US	daily high max (Tie)	12.2 C (54.0 F)	tie	85 years	8 of 100 (Routine)

Climate Trend

22 complete years, 1906 to 1932

One stripe for each of 22 complete years at Washta, 1906 to 1932. Blue stripes are years cooler than the station's own mean of 8.7 C (47.6 F); red stripes are warmer. The coolest year was 1924, at 7.2 C (44.9 F), and the warmest was 1931, at 11.3 C (52.3 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Washta as warming stripes, 1906 to 1932
Year	Annual mean temperature	Difference from the station mean
1906	8.6 C	-0.11 C
1907	7.7 C	-1.00 C
1908	8.9 C	+0.25 C
1909	7.6 C	-1.04 C
1910	8.6 C	-0.13 C
1911	9.1 C	+0.38 C
1913	9.0 C	+0.35 C
1914	8.9 C	+0.26 C
1915	8.5 C	-0.15 C
1918	9.0 C	+0.30 C
1919	8.3 C	-0.34 C
1921	10.4 C	+1.75 C
1922	9.2 C	+0.54 C
1923	8.0 C	-0.66 C
1924	7.2 C	-1.52 C
1926	8.7 C	-0.02 C
1927	8.3 C	-0.38 C
1928	8.5 C	-0.15 C
1929	7.3 C	-1.35 C
1930	9.7 C	+0.97 C
1931	11.3 C	+2.61 C
1932	8.2 C	-0.46 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

1897 to 2019

Yearly extremes at Washta: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1930	36.7 C (98.1 F)	39
Coldest night (TNn)	-43.9 C (-47.0 F)	1912	-30.6 C (-23.1 F)	45
Wettest day (Rx1day)	144.0 mm (5.7 in)	2015	55.1 mm (2.2 in)	56
Wettest five days (Rx5day)	200.1 mm (7.9 in)	2015	80.3 mm (3.2 in)	55
Longest dry spell (CDD)	54 days	1914	26 days	55

Hottest day (TXx)

The hottest day of the year at Washta, 1897 to 2019. The record is 41.7 C (107.1 F) in 1930, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Washta by year
Year	Hottest day (TXx)
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	37.2 C (99.0 F)
1906	37.8 C (100.0 F)
1907	35.0 C (95.0 F)
1908	35.0 C (95.0 F)
1909	36.1 C (97.0 F)
1910	36.1 C (97.0 F)
1911	41.1 C (106.0 F)
1912	36.7 C (98.1 F)
1913	37.8 C (100.0 F)
1914	37.8 C (100.0 F)
1915	31.1 C (88.0 F)
1916	37.2 C (99.0 F)
1917	35.6 C (96.1 F)
1918	36.7 C (98.1 F)
1919	35.6 C (96.1 F)
1920	34.4 C (93.9 F)
1921	36.7 C (98.1 F)
1922	37.8 C (100.0 F)
1923	33.9 C (93.0 F)
1924	33.9 C (93.0 F)
1925	37.2 C (99.0 F)
1926	39.4 C (102.9 F)
1927	36.7 C (98.1 F)
1928	36.7 C (98.1 F)
1929	36.7 C (98.1 F)
1930	41.7 C (107.1 F)
1931	40.6 C (105.1 F)
1932	38.3 C (100.9 F)
1933	41.7 C (107.1 F)
1954	n/a
1955	n/a
1956	10.0 C (50.0 F)
1981	31.7 C (89.1 F)
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
2012	37.2 C (99.0 F)
2013	33.3 C (91.9 F)
2014	32.8 C (91.0 F)
2015	35.6 C (96.1 F)
2016	35.6 C (96.1 F)
2017	34.4 C (93.9 F)
2018	37.8 C (100.0 F)
2019	27.8 C (82.0 F)

Coldest night (TNn)

The coldest night of the year at Washta, 1897 to 2019. The record is -43.9 C (-47.0 F) in 1912, marked on the chart; the median year is -30.6 C (-23.1 F).

Coldest night (TNn) at Washta by year
Year	Coldest night (TNn)
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	-20.0 C (-4.0 F)
1906	-31.1 C (-24.0 F)
1907	-35.0 C (-31.0 F)
1908	-26.7 C (-16.1 F)
1909	-29.4 C (-20.9 F)
1910	-36.7 C (-34.1 F)
1911	-37.2 C (-35.0 F)
1912	-43.9 C (-47.0 F)
1913	-29.4 C (-20.9 F)
1914	-31.7 C (-25.1 F)
1915	-34.4 C (-29.9 F)
1916	-27.2 C (-17.0 F)
1917	-40.0 C (-40.0 F)
1918	-37.8 C (-36.0 F)
1919	-32.8 C (-27.0 F)
1920	-26.7 C (-16.1 F)
1921	-30.0 C (-22.0 F)
1922	-31.1 C (-24.0 F)
1923	-28.3 C (-18.9 F)
1924	-37.8 C (-36.0 F)
1925	-28.3 C (-18.9 F)
1926	-28.9 C (-20.0 F)
1927	-26.7 C (-16.1 F)
1928	-24.4 C (-11.9 F)
1929	-33.9 C (-29.0 F)
1930	-32.2 C (-26.0 F)
1931	-22.8 C (-9.0 F)
1932	-32.8 C (-27.0 F)
1933	-32.2 C (-26.0 F)
1954	n/a
1955	n/a
1956	-21.7 C (-7.1 F)
1981	-3.3 C (26.1 F)
1988	n/a
1989	-34.4 C (-29.9 F)
1990	-31.1 C (-24.0 F)
1991	-31.7 C (-25.1 F)
1992	-26.7 C (-16.1 F)
1993	-35.6 C (-32.1 F)
1994	-36.1 C (-33.0 F)
2012	2.2 C (36.0 F)
2013	-25.0 C (-13.0 F)
2014	-28.9 C (-20.0 F)
2015	-30.6 C (-23.1 F)
2016	-25.0 C (-13.0 F)
2017	-25.6 C (-14.1 F)
2018	-33.3 C (-27.9 F)
2019	-28.9 C (-20.0 F)

Wettest day (Rx1day)

The wettest day of the year at Washta, 1897 to 2019. The record is 144.0 mm (5.7 in) in 2015, marked on the chart; the median year is 55.1 mm (2.2 in).

Wettest day (Rx1day) at Washta by year
Year	Wettest day (Rx1day)
1897	38.1 mm (1.5 in)
1898	41.9 mm (1.6 in)
1899	68.8 mm (2.7 in)
1900	116.8 mm (4.6 in)
1901	38.6 mm (1.5 in)
1902	64.8 mm (2.6 in)
1903	84.3 mm (3.3 in)
1904	55.1 mm (2.2 in)
1905	98.6 mm (3.9 in)
1906	52.8 mm (2.1 in)
1907	52.3 mm (2.1 in)
1908	52.1 mm (2.1 in)
1909	69.9 mm (2.8 in)
1910	62.2 mm (2.4 in)
1911	46.2 mm (1.8 in)
1912	69.1 mm (2.7 in)
1913	73.7 mm (2.9 in)
1914	116.8 mm (4.6 in)
1915	101.6 mm (4.0 in)
1916	38.1 mm (1.5 in)
1917	46.0 mm (1.8 in)
1918	49.5 mm (1.9 in)
1919	86.4 mm (3.4 in)
1920	78.7 mm (3.1 in)
1921	52.8 mm (2.1 in)
1922	60.5 mm (2.4 in)
1923	48.8 mm (1.9 in)
1924	55.1 mm (2.2 in)
1925	101.6 mm (4.0 in)
1926	117.6 mm (4.6 in)
1927	40.6 mm (1.6 in)
1928	59.9 mm (2.4 in)
1929	52.1 mm (2.1 in)
1930	47.0 mm (1.9 in)
1931	45.0 mm (1.8 in)
1932	113.0 mm (4.4 in)
1933	34.5 mm (1.4 in)
1954	106.7 mm (4.2 in)
1955	60.7 mm (2.4 in)
1956	5.8 mm (0.23 in)
1981	6.4 mm (0.25 in)
1988	10.2 mm (0.4 in)
1989	68.6 mm (2.7 in)
1990	81.5 mm (3.2 in)
1991	50.8 mm (2.0 in)
1992	55.9 mm (2.2 in)
1993	48.8 mm (1.9 in)
1994	55.9 mm (2.2 in)
2012	38.4 mm (1.5 in)
2013	36.3 mm (1.4 in)
2014	112.0 mm (4.4 in)
2015	144.0 mm (5.7 in)
2016	53.3 mm (2.1 in)
2017	53.1 mm (2.1 in)
2018	81.3 mm (3.2 in)
2019	30.0 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Washta, 1897 to 2019. The record is 200.1 mm (7.9 in) in 2015, marked on the chart; the median year is 80.3 mm (3.2 in).

Wettest five days (Rx5day) at Washta by year
Year	Wettest five days (Rx5day)
1897	45.0 mm (1.8 in)
1898	78.2 mm (3.1 in)
1899	80.3 mm (3.2 in)
1900	162.3 mm (6.4 in)
1901	73.2 mm (2.9 in)
1902	154.0 mm (6.1 in)
1903	166.3 mm (6.5 in)
1904	72.4 mm (2.9 in)
1905	114.1 mm (4.5 in)
1906	76.2 mm (3.0 in)
1907	100.4 mm (4.0 in)
1908	103.7 mm (4.1 in)
1909	87.9 mm (3.5 in)
1910	86.1 mm (3.4 in)
1911	49.2 mm (1.9 in)
1912	76.3 mm (3.0 in)
1913	124.4 mm (4.9 in)
1914	148.6 mm (5.9 in)
1915	102.9 mm (4.1 in)
1916	49.5 mm (1.9 in)
1917	75.0 mm (3.0 in)
1918	73.7 mm (2.9 in)
1919	125.1 mm (4.9 in)
1920	83.8 mm (3.3 in)
1921	75.9 mm (3.0 in)
1922	101.1 mm (4.0 in)
1923	67.3 mm (2.6 in)
1924	96.8 mm (3.8 in)
1925	139.2 mm (5.5 in)
1926	119.9 mm (4.7 in)
1927	53.4 mm (2.1 in)
1928	78.4 mm (3.1 in)
1929	72.1 mm (2.8 in)
1930	74.0 mm (2.9 in)
1931	73.1 mm (2.9 in)
1932	129.6 mm (5.1 in)
1933	70.1 mm (2.8 in)
1954	154.7 mm (6.1 in)
1955	72.1 mm (2.8 in)
1956	5.8 mm (0.23 in)
1981	n/a
1988	10.2 mm (0.4 in)
1989	122.9 mm (4.8 in)
1990	122.6 mm (4.8 in)
1991	84.6 mm (3.3 in)
1992	114.3 mm (4.5 in)
1993	80.7 mm (3.2 in)
1994	76.2 mm (3.0 in)
2012	70.1 mm (2.8 in)
2013	42.6 mm (1.7 in)
2014	176.5 mm (6.9 in)
2015	200.1 mm (7.9 in)
2016	69.4 mm (2.7 in)
2017	75.6 mm (3.0 in)
2018	99.1 mm (3.9 in)
2019	71.4 mm (2.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Washta, 1897 to 2019. The record is 54 days in 1914, marked on the chart; the median year is 26 days.

Longest dry spell (CDD) at Washta by year
Year	Longest dry spell (CDD)
1897	23 days
1898	31 days
1899	21 days
1900	20 days
1901	29 days
1902	20 days
1903	23 days
1904	36 days
1905	23 days
1906	26 days
1907	21 days
1908	30 days
1909	17 days
1910	47 days
1911	39 days
1912	21 days
1913	27 days
1914	54 days
1915	30 days
1916	29 days
1917	32 days
1918	22 days
1919	28 days
1920	20 days
1921	25 days
1922	20 days
1923	47 days
1924	32 days
1925	25 days
1926	47 days
1927	26 days
1928	20 days
1929	23 days
1930	26 days
1931	41 days
1932	28 days
1933	18 days
1954	35 days
1955	49 days
1956	28 days
1981	n/a
1988	11 days
1989	29 days
1990	25 days
1991	23 days
1992	22 days
1993	18 days
1994	22 days
2012	13 days
2013	26 days
2014	23 days
2015	27 days
2016	22 days
2017	51 days
2018	21 days
2019	37 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.

Frost Dates and Growing Season

22 years with a frost

Across 22 years with a frost, the median last spring frost at Washta falls on 17 May and the median first autumn frost on 24 September, which leaves a median of 131 days between them.

Frost dates and growing season at Washta
Measure	Median, all years	Earliest period	Recent period (1906 to 1932)	Recent against earliest	Fitted trend
Last spring frost	17 May	n/a	17 May	n/a	n/a
First autumn frost	24 September	n/a	24 September	n/a	n/a
Growing days	131 days	n/a	131 days	n/a	n/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

41 years, 1898 to 2018

A day with at least 63.2 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 173.9 mm (6.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Washta: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	63.2 mm (2.5 in)
5 years	85.8 mm (3.4 in)
10 years	103.2 mm (4.1 in)
25 years	128.5 mm (5.1 in)
50 years	150.0 mm (5.9 in)	Longer than the 41 years of record
100 years	173.9 mm (6.8 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 1898 to 2018.

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: 144.0 mm (5.7 in) in 2015; 117.6 mm (4.6 in) in 1926; 116.8 mm (4.6 in) in 1900.

Download the Data

Data for Washta standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Washta 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 2026-10-17 (17 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).