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
Record highRecord low2026 daily maximum2026 daily minimum
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
Year with most
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
Complete yearUnder 90 percent of days
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.
Cooler than the station meanWarmer than the station mean
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.