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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Lacona Weather Records (USC00134523)

Record envelope, standing records and threshold days for Lacona (USC00134523), Iowa, United States, with 39 years of record.

Key Facts for Lacona

  • Lacona (USC00134523) is a weather station in Iowa, United States at 41.18 latitude and -93.37 longitude, 250 m (820 ft) above sea level.
  • The station reports from 1899 to 1937, 39 years of record.
  • 0 records set at Lacona still stand.
  • Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
  • Lacona tied a daily record precipitation of 10.2 mm (0.4 in) on 20 August 1937.

About the Station

  • Location: Iowa, United States, 41.18 latitude, -93.37 longitude.
  • Elevation: 250 m (820 ft).
  • Period of record: 1899 to 1937, 39 years.
  • Eligible elements: prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Lacona, with 2026 drawn through them The band shows the record high and record low for each calendar day at Lacona. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Lacona. 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 Lacona, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Lacona by the year they were set 0 records at Lacona still stand. 00000000000
0 records at Lacona still stand.
Standing records at Lacona by the year they were set
Year setStanding records

Wettest Day of Each Month

Jun: 196.9 mm (7.8 in)
Record daily precipitation for each month at Lacona The wettest day on record for each calendar month at Lacona. The most was 196.9 mm (7.8 in) on 13 June 1926. 050100150200 Jan: 53.3 mm (2.1 in), 28 January 1909 Jan Feb: 50.8 mm (2.0 in), 17 February 1911 Feb Mar: 66.0 mm (2.6 in), 16 March 1919 Mar Apr: 53.6 mm (2.1 in), 20 April 1905 Apr May: 99.1 mm (3.9 in), 24 May 1922 May Jun: 196.9 mm (7.8 in), 13 June 1926 Jun Jul: 128.3 mm (5.1 in), 22 July 1935 Jul Aug: 157.5 mm (6.2 in), 27 August 1903 Aug Sep: 116.8 mm (4.6 in), 14 September 1914 Sep Oct: 76.5 mm (3.0 in), 18 October 1905 Oct Nov: 73.7 mm (2.9 in), 3 November 1935 Nov Dec: 32.8 mm (1.3 in), 30 December 1906 Dec
The wettest day on record for each calendar month at Lacona. The most was 196.9 mm (7.8 in) on 13 June 1926.
Record daily precipitation for each month at Lacona
MonthRecord daily precipitation (mm)Date
Jan53.3 mm (2.1 in)28 January 1909
Feb50.8 mm (2.0 in)17 February 1911
Mar66.0 mm (2.6 in)16 March 1919
Apr53.6 mm (2.1 in)20 April 1905
May99.1 mm (3.9 in)24 May 1922
Jun196.9 mm (7.8 in)13 June 1926
Jul128.3 mm (5.1 in)22 July 1935
Aug157.5 mm (6.2 in)27 August 1903
Sep116.8 mm (4.6 in)14 September 1914
Oct76.5 mm (3.0 in)18 October 1905
Nov73.7 mm (2.9 in)3 November 1935
Dec32.8 mm (1.3 in)30 December 1906

Latest Records

20
Latest records at Lacona
DateStationRecordValueBeat old record byOld record stoodSignificance
20 August 1937Lacona, USdaily rain (Tie)10.2 mm (0.4 in)tie8 years1 of 100 (Routine)
19 August 1937Lacona, USdaily rain27.4 mm (1.1 in)4.5 mm (0.18 in)12 years8 of 100 (Routine)
13 July 1937Lacona, USdaily rain (Tie)6.4 mm (0.25 in)tie24 years2 of 100 (Routine)
25 March 1937Lacona, USdaily snowfall (Tie)5.1 cm (2.0 in)tie24 years2 of 100 (Routine)
19 February 1937Lacona, USdaily snowfall8.9 cm (3.5 in)2.5 cm (1.0 in)13 years11 of 100 (Routine)
19 February 1937Lacona, USdaily rain8.9 mm (0.35 in)2.5 mm (0.10 in)13 years9 of 100 (Routine)
30 January 1937Lacona, USdaily rain20.6 mm (0.8 in)10.4 mm (0.4 in)21 years20 of 100 (Routine)
8 January 1937Lacona, USdaily rain3.0 mm (0.12 in)0.5 mm (0.02 in)25 years10 of 100 (Routine)
7 January 1937Lacona, USdaily rain24.9 mm (1.0 in)9.7 mm (0.38 in)7 years19 of 100 (Routine)
7 January 1937Lacona, USdaily snowfall (Tie)7.6 cm (3.0 in)tie14 years1 of 100 (Routine)
5 December 1936Lacona, USdaily snowfall8.9 cm (3.5 in)1.3 cm (0.5 in)27 years14 of 100 (Routine)
4 October 1936Lacona, USdaily rain27.4 mm (1.1 in)0.5 mm (0.02 in)34 years13 of 100 (Routine)
16 September 1936Lacona, USdaily rain17.8 mm (0.7 in)2.6 mm (0.10 in)31 years13 of 100 (Routine)
13 September 1936Lacona, USdaily rain32.3 mm (1.3 in)4.4 mm (0.17 in)26 years12 of 100 (Routine)
12 September 1936Lacona, USdaily rain37.6 mm (1.5 in)19.8 mm (0.8 in)3 years15 of 100 (Routine)
5 August 1936Lacona, USdaily rain (Tie)50.8 mm (2.0 in)tie12 years1 of 100 (Routine)
9 June 1936Lacona, USdaily rain24.1 mm (0.9 in)9.6 mm (0.38 in)13 years10 of 100 (Routine)
1 April 1936Lacona, USdaily snowfall6.4 cm (2.5 in)6.4 cm (2.5 in)36 years26 of 100 (Routine)
17 January 1936Lacona, USdaily snowfall12.7 cm (5.0 in)1.3 cm (0.5 in)5 years7 of 100 (Routine)
17 January 1936Lacona, USdaily rain12.7 mm (0.5 in)1.3 mm (0.05 in)5 years5 of 100 (Routine)

Extremes by Year

1899 to 1937
Yearly extremes at Lacona: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)196.9 mm (7.8 in)192666.0 mm (2.6 in)39
Wettest five days (Rx5day)292.3 mm (11.5 in)1926102.1 mm (4.0 in)39
Longest dry spell (CDD)45 days193122 days39

Wettest day (Rx1day)

Wettest day (Rx1day) at Lacona by year The wettest day of the year at Lacona, 1899 to 1937. The record is 196.9 mm (7.8 in) in 1926, marked on the chart; the median year is 66.0 mm (2.6 in). 0501001502001900191019201930Record: 196.9 mm (7.8 in) in 1926
The wettest day of the year at Lacona, 1899 to 1937. The record is 196.9 mm (7.8 in) in 1926, marked on the chart; the median year is 66.0 mm (2.6 in).
Wettest day (Rx1day) at Lacona by year
YearWettest day (Rx1day)
189959.4 mm (2.3 in)
190063.5 mm (2.5 in)
190163.5 mm (2.5 in)
1902101.6 mm (4.0 in)
1903157.5 mm (6.2 in)
190488.9 mm (3.5 in)
190576.5 mm (3.0 in)
190663.5 mm (2.5 in)
190735.6 mm (1.4 in)
190871.1 mm (2.8 in)
190953.3 mm (2.1 in)
191042.7 mm (1.7 in)
191155.9 mm (2.2 in)
191281.3 mm (3.2 in)
1913101.6 mm (4.0 in)
1914116.8 mm (4.6 in)
1915104.4 mm (4.1 in)
191652.8 mm (2.1 in)
191774.7 mm (2.9 in)
191891.4 mm (3.6 in)
191966.0 mm (2.6 in)
192064.5 mm (2.5 in)
192163.5 mm (2.5 in)
192299.1 mm (3.9 in)
192352.1 mm (2.1 in)
1924114.3 mm (4.5 in)
192570.1 mm (2.8 in)
1926196.9 mm (7.8 in)
192744.5 mm (1.8 in)
192866.0 mm (2.6 in)
192926.7 mm (1.1 in)
1930106.7 mm (4.2 in)
193177.2 mm (3.0 in)
193257.2 mm (2.3 in)
193350.8 mm (2.0 in)
193440.6 mm (1.6 in)
1935128.3 mm (5.1 in)
193650.8 mm (2.0 in)
193731.8 mm (1.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Lacona by year The wettest five days of the year at Lacona, 1899 to 1937. The record is 292.3 mm (11.5 in) in 1926, marked on the chart; the median year is 102.1 mm (4.0 in). 01002003001900191019201930Record: 292.3 mm (11.5 in) in 1926
The wettest five days of the year at Lacona, 1899 to 1937. The record is 292.3 mm (11.5 in) in 1926, marked on the chart; the median year is 102.1 mm (4.0 in).
Wettest five days (Rx5day) at Lacona by year
YearWettest five days (Rx5day)
189992.9 mm (3.7 in)
1900108.0 mm (4.3 in)
190178.7 mm (3.1 in)
1902142.2 mm (5.6 in)
1903170.2 mm (6.7 in)
1904101.6 mm (4.0 in)
190599.5 mm (3.9 in)
190663.5 mm (2.5 in)
190769.6 mm (2.7 in)
1908101.5 mm (4.0 in)
190988.9 mm (3.5 in)
191066.8 mm (2.6 in)
1911101.2 mm (4.0 in)
191289.4 mm (3.5 in)
1913190.8 mm (7.5 in)
1914196.8 mm (7.7 in)
1915153.6 mm (6.0 in)
191678.4 mm (3.1 in)
1917138.7 mm (5.5 in)
1918102.1 mm (4.0 in)
1919115.0 mm (4.5 in)
1920108.7 mm (4.3 in)
1921122.0 mm (4.8 in)
1922141.5 mm (5.6 in)
192362.6 mm (2.5 in)
1924144.8 mm (5.7 in)
192591.7 mm (3.6 in)
1926292.3 mm (11.5 in)
192767.4 mm (2.7 in)
1928113.5 mm (4.5 in)
192959.9 mm (2.4 in)
1930132.1 mm (5.2 in)
1931108.6 mm (4.3 in)
193287.8 mm (3.5 in)
193361.0 mm (2.4 in)
1934114.2 mm (4.5 in)
1935204.0 mm (8.0 in)
1936114.4 mm (4.5 in)
193757.7 mm (2.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Lacona by year The longest dry spell of the year at Lacona, 1899 to 1937. The record is 45 days in 1931, marked on the chart; the median year is 22 days. 10203040501900191019201930Record: 45 days in 1931
The longest dry spell of the year at Lacona, 1899 to 1937. The record is 45 days in 1931, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Lacona by year
YearLongest dry spell (CDD)
189919 days
190022 days
190127 days
190219 days
190316 days
190431 days
190522 days
190634 days
190725 days
190827 days
190916 days
191022 days
191118 days
191217 days
191342 days
191424 days
191523 days
191619 days
191722 days
191819 days
191934 days
192018 days
192120 days
192217 days
192323 days
192420 days
192525 days
192624 days
192732 days
192819 days
192920 days
193019 days
193145 days
193217 days
193330 days
193435 days
193517 days
193622 days
193722 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

35 years, 1900 to 1936

A day with at least 71.6 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 207.1 mm (8.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Lacona: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years71.6 mm (2.8 in)
5 years101.2 mm (4.0 in)
10 years123.3 mm (4.9 in)
25 years154.2 mm (6.1 in)
50 years179.6 mm (7.1 in)Longer than the 35 years of record
100 years207.1 mm (8.2 in)Longer than the 35 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, 35 years of values from 1900 to 1936.

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: 196.9 mm (7.8 in) in 1926; 157.5 mm (6.2 in) in 1903; 128.3 mm (5.1 in) in 1935.

Download the Data

  • Data for Lacona standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Lacona 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 . Last revised (2025-12-31).