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Built 2026-10-16 (16 October 2026)

Dover Dam Weather Records (USC00332272)

Record envelope, standing records and threshold days for Dover Dam (USC00332272), Ohio, United States, with 39 years of record.

Key Facts for Dover Dam

  • Dover Dam (USC00332272) is a weather station in Ohio, United States at 40.57 latitude and -81.42 longitude, 284 m (930 ft) above sea level.
  • The station reports from 1949 to 1987, 39 years of record.
  • 0 records set at Dover Dam still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Dover Dam set a daily record precipitation of 26.4 mm (1.0 in) on 19 May 1987.

About the Station

  • Location: Ohio, United States, 40.57 latitude, -81.42 longitude.
  • Elevation: 284 m (930 ft).
  • Period of record: 1949 to 1987, 39 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 Dover Dam, with 2026 drawn through them The band shows the record high and record low for each calendar day at Dover Dam. 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 Dover Dam. 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 Dover Dam, 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 Dover Dam by the year they were set 0 records at Dover Dam still stand. 00000000000
0 records at Dover Dam still stand.
Standing records at Dover Dam by the year they were set
Year setStanding records

Wettest Day of Each Month

Jul: 143.5 mm (5.6 in)
Record daily precipitation for each month at Dover Dam The wettest day on record for each calendar month at Dover Dam. The most was 143.5 mm (5.6 in) on 5 July 1969. 050100150 Jan: 44.5 mm (1.8 in), 27 January 1952 Jan Feb: 48.0 mm (1.9 in), 26 February 1961 Feb Mar: 58.2 mm (2.3 in), 10 March 1964 Mar Apr: 45.0 mm (1.8 in), 27 April 1959 Apr May: 78.7 mm (3.1 in), 6 May 1971 May Jun: 85.6 mm (3.4 in), 20 June 1983 Jun Jul: 143.5 mm (5.6 in), 5 July 1969 Jul Aug: 79.0 mm (3.1 in), 28 August 1974 Aug Sep: 61.0 mm (2.4 in), 14 September 1979 Sep Oct: 71.1 mm (2.8 in), 1 October 1959 Oct Nov: 62.2 mm (2.4 in), 5 November 1985 Nov Dec: 40.6 mm (1.6 in), 28 December 1968 Dec
The wettest day on record for each calendar month at Dover Dam. The most was 143.5 mm (5.6 in) on 5 July 1969.
Record daily precipitation for each month at Dover Dam
MonthRecord daily precipitation (mm)Date
Jan44.5 mm (1.8 in)27 January 1952
Feb48.0 mm (1.9 in)26 February 1961
Mar58.2 mm (2.3 in)10 March 1964
Apr45.0 mm (1.8 in)27 April 1959
May78.7 mm (3.1 in)6 May 1971
Jun85.6 mm (3.4 in)20 June 1983
Jul143.5 mm (5.6 in)5 July 1969
Aug79.0 mm (3.1 in)28 August 1974
Sep61.0 mm (2.4 in)14 September 1979
Oct71.1 mm (2.8 in)1 October 1959
Nov62.2 mm (2.4 in)5 November 1985
Dec40.6 mm (1.6 in)28 December 1968

Latest Records

20
Latest records at Dover Dam
DateStationRecordValueBeat old record byOld record stoodSignificance
19 May 1987Dover Dam, USdaily rain26.4 mm (1.0 in)10.9 mm (0.4 in)0 years15 of 100 (Routine)
7 April 1987Dover Dam, USdaily snow depth2.5 cm (1.0 in)2.5 cm (1.0 in)36 years16 of 100 (Routine)
6 April 1987Dover Dam, USdaily snow depth15.2 cm (6.0 in)15.2 cm (6.0 in)36 years29 of 100 (Routine)
5 April 1987Dover Dam, USdaily snow depth25.4 cm (10.0 in)25.4 cm (10.0 in)36 years39 of 100 (Notable)
5 April 1987Dover Dam, USdaily snowfall10.2 cm (4.0 in)10.2 cm (4.0 in)36 years34 of 100 (Routine)
4 April 1987Dover Dam, USmonthly snow depth38.1 cm (15.0 in)25.4 cm (10.0 in)4 years39 of 100 (Notable)
31 March 1987Dover Dam, USdaily rain33.5 mm (1.3 in)13.9 mm (0.5 in)24 years27 of 100 (Routine)
31 March 1987Dover Dam, USdaily snowfall7.6 cm (3.0 in)2.5 cm (1.0 in)22 years14 of 100 (Routine)
3 December 1986Dover Dam, USdaily rain14.7 mm (0.6 in)1.7 mm (0.07 in)19 years10 of 100 (Routine)
2 December 1986Dover Dam, USdaily rain32.8 mm (1.3 in)20.1 mm (0.8 in)12 years38 of 100 (Notable)
26 October 1986Dover Dam, USdaily rain12.2 mm (0.5 in)1.8 mm (0.07 in)5 years6 of 100 (Routine)
25 September 1986Dover Dam, USdaily rain28.2 mm (1.1 in)19.6 mm (0.8 in)16 years25 of 100 (Routine)
26 July 1986Dover Dam, USdaily rain14.0 mm (0.6 in)2.6 mm (0.10 in)24 years11 of 100 (Routine)
9 July 1986Dover Dam, USdaily rain49.0 mm (1.9 in)1.2 mm (0.05 in)32 years12 of 100 (Routine)
2 July 1986Dover Dam, USdaily rain58.2 mm (2.3 in)29.8 mm (1.2 in)3 years22 of 100 (Routine)
31 May 1986Dover Dam, USdaily rain13.7 mm (0.5 in)0.7 mm (0.03 in)8 years5 of 100 (Routine)
19 May 1986Dover Dam, USdaily rain15.5 mm (0.6 in)1.3 mm (0.05 in)16 years9 of 100 (Routine)
5 February 1986Dover Dam, USdaily rain18.3 mm (0.7 in)6.9 mm (0.27 in)15 years16 of 100 (Routine)
20 January 1986Dover Dam, USdaily rain25.7 mm (1.0 in)8.9 mm (0.35 in)34 years26 of 100 (Routine)
14 December 1985Dover Dam, USdaily snowfall (Tie)2.5 cm (1.0 in)tie35 years3 of 100 (Routine)

Extremes by Year

1949 to 1987
Yearly extremes at Dover Dam: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)143.5 mm (5.6 in)196958.2 mm (2.3 in)39
Wettest five days (Rx5day)182.2 mm (7.2 in)196987.6 mm (3.4 in)39
Longest dry spell (CDD)46 days196314 days39

Wettest day (Rx1day)

Wettest day (Rx1day) at Dover Dam by year The wettest day of the year at Dover Dam, 1949 to 1987. The record is 143.5 mm (5.6 in) in 1969, marked on the chart; the median year is 58.2 mm (2.3 in). 0501001501950196019701980Record: 143.5 mm (5.6 in) in 1969
The wettest day of the year at Dover Dam, 1949 to 1987. The record is 143.5 mm (5.6 in) in 1969, marked on the chart; the median year is 58.2 mm (2.3 in).
Wettest day (Rx1day) at Dover Dam by year
YearWettest day (Rx1day)
194926.9 mm (1.1 in)
195082.8 mm (3.3 in)
195145.0 mm (1.8 in)
195244.5 mm (1.8 in)
195347.8 mm (1.9 in)
195459.9 mm (2.4 in)
195538.1 mm (1.5 in)
195653.3 mm (2.1 in)
195773.7 mm (2.9 in)
195891.4 mm (3.6 in)
195971.1 mm (2.8 in)
196062.0 mm (2.4 in)
196156.9 mm (2.2 in)
196236.8 mm (1.4 in)
196350.3 mm (2.0 in)
196458.2 mm (2.3 in)
196569.9 mm (2.8 in)
196640.9 mm (1.6 in)
196731.5 mm (1.2 in)
196883.8 mm (3.3 in)
1969143.5 mm (5.6 in)
197043.4 mm (1.7 in)
197178.7 mm (3.1 in)
197236.6 mm (1.4 in)
197334.3 mm (1.4 in)
197479.0 mm (3.1 in)
197564.8 mm (2.6 in)
197649.5 mm (1.9 in)
197793.7 mm (3.7 in)
197852.3 mm (2.1 in)
197961.0 mm (2.4 in)
198063.2 mm (2.5 in)
198142.7 mm (1.7 in)
198240.6 mm (1.6 in)
198385.6 mm (3.4 in)
198460.7 mm (2.4 in)
198562.2 mm (2.4 in)
198658.2 mm (2.3 in)
198738.1 mm (1.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Dover Dam by year The wettest five days of the year at Dover Dam, 1949 to 1987. The record is 182.2 mm (7.2 in) in 1969, marked on the chart; the median year is 87.6 mm (3.4 in). 501001502001950196019701980Record: 182.2 mm (7.2 in) in 1969
The wettest five days of the year at Dover Dam, 1949 to 1987. The record is 182.2 mm (7.2 in) in 1969, marked on the chart; the median year is 87.6 mm (3.4 in).
Wettest five days (Rx5day) at Dover Dam by year
YearWettest five days (Rx5day)
194955.6 mm (2.2 in)
195089.9 mm (3.5 in)
195156.2 mm (2.2 in)
195273.9 mm (2.9 in)
195363.7 mm (2.5 in)
195490.2 mm (3.6 in)
195563.4 mm (2.5 in)
195678.5 mm (3.1 in)
195787.6 mm (3.4 in)
1958169.1 mm (6.7 in)
1959109.4 mm (4.3 in)
1960103.5 mm (4.1 in)
1961113.5 mm (4.5 in)
196268.5 mm (2.7 in)
196381.6 mm (3.2 in)
196499.4 mm (3.9 in)
196575.0 mm (3.0 in)
196659.4 mm (2.3 in)
196755.4 mm (2.2 in)
196890.9 mm (3.6 in)
1969182.2 mm (7.2 in)
1970108.6 mm (4.3 in)
197188.9 mm (3.5 in)
197253.9 mm (2.1 in)
197388.2 mm (3.5 in)
1974128.6 mm (5.1 in)
1975102.2 mm (4.0 in)
1976120.9 mm (4.8 in)
197798.8 mm (3.9 in)
197870.9 mm (2.8 in)
197987.4 mm (3.4 in)
198087.6 mm (3.4 in)
198177.0 mm (3.0 in)
198256.2 mm (2.2 in)
198397.8 mm (3.9 in)
198484.6 mm (3.3 in)
198597.8 mm (3.9 in)
198693.9 mm (3.7 in)
198776.7 mm (3.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Dover Dam by year The longest dry spell of the year at Dover Dam, 1949 to 1987. The record is 46 days in 1963, marked on the chart; the median year is 14 days. 010203040501950196019701980Record: 46 days in 1963
The longest dry spell of the year at Dover Dam, 1949 to 1987. The record is 46 days in 1963, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Dover Dam by year
YearLongest dry spell (CDD)
19499 days
195012 days
195114 days
195213 days
195319 days
195414 days
195528 days
195614 days
195713 days
195815 days
195915 days
196011 days
196111 days
196217 days
196346 days
196423 days
196513 days
196615 days
196726 days
196814 days
196925 days
197011 days
197114 days
19729 days
197313 days
197410 days
197515 days
197624 days
197719 days
197812 days
197910 days
198011 days
198119 days
198217 days
198315 days
198411 days
198519 days
198614 days
198716 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

37 years, 1950 to 1986

A day with at least 56.5 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 134.2 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Dover Dam: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years56.5 mm (2.2 in)
5 years75.5 mm (3.0 in)
10 years88.8 mm (3.5 in)
25 years106.4 mm (4.2 in)
50 years120.0 mm (4.7 in)Longer than the 37 years of record
100 years134.2 mm (5.3 in)Longer than the 37 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, 37 years of values from 1950 to 1986.

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: 143.5 mm (5.6 in) in 1969; 93.7 mm (3.7 in) in 1977; 91.4 mm (3.6 in) in 1958.

Download the Data

  • Data for Dover Dam standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Dover Dam 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.

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