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Built 2026-10-15 (15 October 2026)

Gilman Weather Records (USC00133239)

Record envelope, standing records and threshold days for Gilman (USC00133239), Iowa, United States, with 120 years of record.

Key Facts for Gilman

  • Gilman (USC00133239) is a weather station in Iowa, United States at 41.88 latitude and -92.78 longitude, 312 m (1,025 ft) above sea level.
  • The station reports from 1899 to 2018, 120 years of record.
  • 0 records set at Gilman still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Gilman set a daily record snow depth of 5.1 cm (2.0 in) on 15 April 2018.

About the Station

  • Location: Iowa, United States, 41.88 latitude, -92.78 longitude.
  • Elevation: 312 m (1,025 ft).
  • Period of record: 1899 to 2018, 120 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Gilman, with 2026 drawn through them The band shows the record high and record low for each calendar day at Gilman. 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 Gilman. 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 Gilman, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

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

Wettest Day of Each Month

May: 122.2 mm (4.8 in)
Record daily precipitation for each month at Gilman The wettest day on record for each calendar month at Gilman. The most was 122.2 mm (4.8 in) on 24 May 1918. 050100150 Jan: 31.2 mm (1.2 in), 29 January 1909 Jan Feb: 41.9 mm (1.6 in), 13 February 1911 Feb Mar: 54.6 mm (2.1 in), 31 March 1998 Mar Apr: 77.5 mm (3.1 in), 18 April 2013 Apr May: 122.2 mm (4.8 in), 24 May 1918 May Jun: 79.2 mm (3.1 in), 17 June 1990 Jun Jul: 97.5 mm (3.8 in), 18 July 2008 Jul Aug: 98.8 mm (3.9 in), 14 August 1986 Aug Sep: 116.8 mm (4.6 in), 7 September 2007 Sep Oct: 65.8 mm (2.6 in), 1 October 1911 Oct Nov: 101.6 mm (4.0 in), 4 November 2003 Nov Dec: 71.1 mm (2.8 in), 14 December 2015 Dec
The wettest day on record for each calendar month at Gilman. The most was 122.2 mm (4.8 in) on 24 May 1918.
Record daily precipitation for each month at Gilman
MonthRecord daily precipitation (mm)Date
Jan31.2 mm (1.2 in)29 January 1909
Feb41.9 mm (1.6 in)13 February 1911
Mar54.6 mm (2.1 in)31 March 1998
Apr77.5 mm (3.1 in)18 April 2013
May122.2 mm (4.8 in)24 May 1918
Jun79.2 mm (3.1 in)17 June 1990
Jul97.5 mm (3.8 in)18 July 2008
Aug98.8 mm (3.9 in)14 August 1986
Sep116.8 mm (4.6 in)7 September 2007
Oct65.8 mm (2.6 in)1 October 1911
Nov101.6 mm (4.0 in)4 November 2003
Dec71.1 mm (2.8 in)14 December 2015

Latest Records

20
Latest records at Gilman
DateStationRecordValueBeat old record byOld record stoodSignificance
15 April 2018Gilman, USdaily snow depth5.1 cm (2.0 in)5.1 cm (2.0 in)118 years20 of 100 (Routine)
15 April 2018Gilman, USdaily snowfall5.1 cm (2.0 in)2.6 cm (1.0 in)32 years24 of 100 (Routine)
9 April 2018Gilman, USdaily snow depth5.1 cm (2.0 in)5.1 cm (2.0 in)118 years20 of 100 (Routine)
9 April 2018Gilman, USdaily snowfall5.1 cm (2.0 in)1.3 cm (0.5 in)36 years22 of 100 (Routine)
17 March 2018Gilman, USdaily rain20.3 mm (0.8 in)7.1 mm (0.28 in)112 years20 of 100 (Routine)
17 March 2018Gilman, USdaily snowfall7.6 cm (3.0 in)3.3 cm (1.3 in)33 years26 of 100 (Routine)
30 December 2017Gilman, USdaily snowfall7.6 cm (3.0 in)2.5 cm (1.0 in)110 years44 of 100 (Notable)
15 August 2017Gilman, USdaily rain50.8 mm (2.0 in)17.3 mm (0.7 in)115 years50 of 100 (Notable)
21 July 2017Gilman, USdaily rain53.3 mm (2.1 in)26.1 mm (1.0 in)104 years56 of 100 (Notable)
13 March 2017Gilman, USdaily snowfall7.6 cm (3.0 in)2.5 cm (1.0 in)112 years44 of 100 (Notable)
13 March 2017Gilman, USdaily snow depth7.6 cm (3.0 in)2.5 cm (1.0 in)26 years20 of 100 (Routine)
7 March 2017Gilman, USdaily rain15.2 mm (0.6 in)2.5 mm (0.10 in)100 years20 of 100 (Routine)
26 December 2016Gilman, USdaily rain17.8 mm (0.7 in)1.3 mm (0.05 in)100 years20 of 100 (Routine)
18 December 2016Gilman, USdaily snowfall (Tie)5.1 cm (2.0 in)tie13 years3 of 100 (Routine)
5 December 2016Gilman, USdaily snow depth10.2 cm (4.0 in)5.1 cm (2.0 in)20 years21 of 100 (Routine)
4 December 2016Gilman, USdaily snowfall7.6 cm (3.0 in)5.1 cm (2.0 in)26 years26 of 100 (Routine)
2 November 2016Gilman, USdaily rain39.4 mm (1.6 in)1.6 mm (0.06 in)24 years18 of 100 (Routine)
26 October 2016Gilman, USdaily rain20.3 mm (0.8 in)1.0 mm (0.04 in)99 years20 of 100 (Routine)
12 August 2016Gilman, USdaily rain83.8 mm (3.3 in)58.4 mm (2.3 in)23 years53 of 100 (Notable)
5 August 2016Gilman, USdaily rain40.6 mm (1.6 in)2.2 mm (0.09 in)28 years19 of 100 (Routine)

Extremes by Year

1899 to 2018
Yearly extremes at Gilman: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)122.2 mm (4.8 in)191860.8 mm (2.4 in)64
Wettest five days (Rx5day)199.7 mm (7.9 in)191894.4 mm (3.7 in)64
Longest dry spell (CDD)49 days198722 days64

Wettest day (Rx1day)

Wettest day (Rx1day) at Gilman by year The wettest day of the year at Gilman, 1899 to 2018. The record is 122.2 mm (4.8 in) in 1918, marked on the chart; the median year is 60.8 mm (2.4 in). 050100150190019201940196019802000Record: 122.2 mm (4.8 in) in 1918
The wettest day of the year at Gilman, 1899 to 2018. The record is 122.2 mm (4.8 in) in 1918, marked on the chart; the median year is 60.8 mm (2.4 in).
Wettest day (Rx1day) at Gilman by year
YearWettest day (Rx1day)
189948.5 mm (1.9 in)
190067.1 mm (2.6 in)
190166.0 mm (2.6 in)
190250.3 mm (2.0 in)
190353.3 mm (2.1 in)
190457.7 mm (2.3 in)
190545.7 mm (1.8 in)
190651.8 mm (2.0 in)
190745.0 mm (1.8 in)
190850.3 mm (2.0 in)
190987.9 mm (3.5 in)
191054.6 mm (2.1 in)
191165.8 mm (2.6 in)
191252.3 mm (2.1 in)
191336.1 mm (1.4 in)
191480.8 mm (3.2 in)
191559.9 mm (2.4 in)
191629.5 mm (1.2 in)
191766.5 mm (2.6 in)
1918122.2 mm (4.8 in)
197333.3 mm (1.3 in)
197469.3 mm (2.7 in)
197742.7 mm (1.7 in)
197886.1 mm (3.4 in)
197979.0 mm (3.1 in)
198050.8 mm (2.0 in)
198177.5 mm (3.1 in)
198260.5 mm (2.4 in)
198362.0 mm (2.4 in)
198453.6 mm (2.1 in)
198546.2 mm (1.8 in)
198698.8 mm (3.9 in)
198777.5 mm (3.1 in)
198855.4 mm (2.2 in)
198955.6 mm (2.2 in)
199079.2 mm (3.1 in)
199153.6 mm (2.1 in)
199297.0 mm (3.8 in)
199384.6 mm (3.3 in)
199459.9 mm (2.4 in)
199543.2 mm (1.7 in)
199678.7 mm (3.1 in)
199766.0 mm (2.6 in)
199874.9 mm (2.9 in)
199949.8 mm (2.0 in)
200049.5 mm (1.9 in)
200153.3 mm (2.1 in)
200261.0 mm (2.4 in)
2003101.6 mm (4.0 in)
200483.8 mm (3.3 in)
200555.9 mm (2.2 in)
200673.7 mm (2.9 in)
2007116.8 mm (4.6 in)
200897.5 mm (3.8 in)
200981.3 mm (3.2 in)
201062.2 mm (2.4 in)
201155.9 mm (2.2 in)
201247.0 mm (1.9 in)
201377.5 mm (3.1 in)
201474.9 mm (2.9 in)
201582.6 mm (3.3 in)
201683.8 mm (3.3 in)
201753.3 mm (2.1 in)
201820.3 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Gilman by year The wettest five days of the year at Gilman, 1899 to 2018. The record is 199.7 mm (7.9 in) in 1918, marked on the chart; the median year is 94.4 mm (3.7 in). 050100150200190019201940196019802000Record: 199.7 mm (7.9 in) in 1918
The wettest five days of the year at Gilman, 1899 to 2018. The record is 199.7 mm (7.9 in) in 1918, marked on the chart; the median year is 94.4 mm (3.7 in).
Wettest five days (Rx5day) at Gilman by year
YearWettest five days (Rx5day)
189968.5 mm (2.7 in)
1900102.7 mm (4.0 in)
190168.5 mm (2.7 in)
1902101.7 mm (4.0 in)
1903125.9 mm (5.0 in)
190479.1 mm (3.1 in)
190583.8 mm (3.3 in)
190657.6 mm (2.3 in)
190772.7 mm (2.9 in)
190863.0 mm (2.5 in)
1909110.2 mm (4.3 in)
191099.6 mm (3.9 in)
1911107.2 mm (4.2 in)
191274.4 mm (2.9 in)
191355.4 mm (2.2 in)
1914155.2 mm (6.1 in)
1915110.7 mm (4.4 in)
191643.2 mm (1.7 in)
191782.2 mm (3.2 in)
1918199.7 mm (7.9 in)
197337.4 mm (1.5 in)
197484.3 mm (3.3 in)
197758.9 mm (2.3 in)
1978159.5 mm (6.3 in)
1979138.3 mm (5.4 in)
198076.5 mm (3.0 in)
198178.0 mm (3.1 in)
198280.5 mm (3.2 in)
1983154.9 mm (6.1 in)
198477.7 mm (3.1 in)
198577.0 mm (3.0 in)
1986111.0 mm (4.4 in)
1987111.3 mm (4.4 in)
198866.8 mm (2.6 in)
198967.8 mm (2.7 in)
1990166.3 mm (6.5 in)
199187.4 mm (3.4 in)
1992128.3 mm (5.1 in)
1993115.9 mm (4.6 in)
1994119.9 mm (4.7 in)
199586.3 mm (3.4 in)
199678.7 mm (3.1 in)
1997101.6 mm (4.0 in)
1998105.3 mm (4.1 in)
199967.8 mm (2.7 in)
200089.1 mm (3.5 in)
200171.6 mm (2.8 in)
200285.0 mm (3.3 in)
2003152.4 mm (6.0 in)
2004143.5 mm (5.6 in)
2005105.4 mm (4.1 in)
2006105.5 mm (4.2 in)
2007126.9 mm (5.0 in)
2008144.6 mm (5.7 in)
2009143.0 mm (5.6 in)
2010114.8 mm (4.5 in)
201178.7 mm (3.1 in)
201272.1 mm (2.8 in)
2013153.8 mm (6.1 in)
2014174.6 mm (6.9 in)
2015122.7 mm (4.8 in)
2016137.1 mm (5.4 in)
201763.4 mm (2.5 in)
201820.3 mm (0.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Gilman by year The longest dry spell of the year at Gilman, 1899 to 2018. The record is 49 days in 1987, marked on the chart; the median year is 22 days. 0204060190019201940196019802000Record: 49 days in 1987
The longest dry spell of the year at Gilman, 1899 to 2018. The record is 49 days in 1987, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Gilman by year
YearLongest dry spell (CDD)
189920 days
190021 days
190120 days
190221 days
190327 days
190430 days
190527 days
190630 days
190725 days
190828 days
190918 days
191019 days
191118 days
191221 days
191328 days
191419 days
19156 days
191616 days
191730 days
19188 days
197317 days
19747 days
19778 days
197825 days
197919 days
198028 days
198131 days
198217 days
198323 days
198424 days
198514 days
198623 days
198749 days
198838 days
198948 days
199019 days
199137 days
199221 days
199318 days
199416 days
199524 days
199624 days
199720 days
199823 days
199934 days
200025 days
200118 days
200242 days
200317 days
200419 days
200519 days
200618 days
200731 days
200815 days
200930 days
201026 days
201124 days
201225 days
201320 days
201422 days
201523 days
201620 days
201735 days
201814 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

45 years, 1900 to 2017

A day with at least 64.7 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 126.1 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Gilman: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years64.7 mm (2.5 in)
5 years81.0 mm (3.2 in)
10 years91.8 mm (3.6 in)
25 years105.6 mm (4.2 in)
50 years115.8 mm (4.6 in)Longer than the 45 years of record
100 years126.1 mm (5.0 in)Longer than the 45 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, 45 years of values from 1900 to 2017.

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: 116.8 mm (4.6 in) in 2007; 101.6 mm (4.0 in) in 2003; 98.8 mm (3.9 in) in 1986.

Download the Data

  • Data for Gilman standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Gilman 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).