Daily records
Page built 2026-10-16
Data as of 2025-12-31
Search
Built 2026-10-16 (16 October 2026)

Grayson Lake Weather Records (USC00153398)

Record envelope, standing records and threshold days for Grayson Lake (USC00153398), Kentucky, United States, with 44 years of record.

Key Facts for Grayson Lake

  • Grayson Lake (USC00153398) is a weather station in Kentucky, United States at 38.25 latitude and -82.99 longitude, 218 m (715 ft) above sea level.
  • The station reports from 1969 to 2012, 44 years of record.
  • 0 records set at Grayson Lake still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Grayson Lake set a daily record precipitation of 29.7 mm (1.2 in) on 27 December 2011.

About the Station

  • Location: Kentucky, United States, 38.25 latitude, -82.99 longitude.
  • Elevation: 218 m (715 ft).
  • Period of record: 1969 to 2012, 44 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 Grayson Lake, with 2026 drawn through them The band shows the record high and record low for each calendar day at Grayson Lake. 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 Grayson Lake. 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 Grayson Lake, 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 Grayson Lake by the year they were set 0 records at Grayson Lake still stand. 00000000000
0 records at Grayson Lake still stand.
Standing records at Grayson Lake by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Grayson Lake set new all-time records 1 all-time records were set at Grayson Lake between 21 July 2010 and 21 July 2010. Each dot is a new record. Record daily precipitation21 July 2010: Record daily precipitation 157.7 mm (6.2 in)2010
1 all-time records were set at Grayson Lake between 21 July 2010 and 21 July 2010. Each dot is a new record.
When Grayson Lake set new all-time records
DateKindDetail
2010-07-21Record daily precipitationRecord daily precipitation 157.7 mm (6.2 in)

Wettest Day of Each Month

Jul: 157.7 mm (6.2 in)
Record daily precipitation for each month at Grayson Lake The wettest day on record for each calendar month at Grayson Lake. The most was 157.7 mm (6.2 in) on 21 July 2010. 050100150200 Jan: 65.5 mm (2.6 in), 28 January 2009 Jan Feb: 57.2 mm (2.3 in), 6 February 2004 Feb Mar: 101.6 mm (4.0 in), 20 March 2002 Mar Apr: 71.1 mm (2.8 in), 22 April 1972 Apr May: 109.7 mm (4.3 in), 12 May 1986 May Jun: 82.3 mm (3.2 in), 5 June 1993 Jun Jul: 157.7 mm (6.2 in), 21 July 2010 Jul Aug: 91.4 mm (3.6 in), 25 August 1999 Aug Sep: 104.9 mm (4.1 in), 6 September 2011 Sep Oct: 69.1 mm (2.7 in), 2 October 1977 Oct Nov: 85.1 mm (3.4 in), 20 November 1988 Nov Dec: 86.9 mm (3.4 in), 9 December 1978 Dec
The wettest day on record for each calendar month at Grayson Lake. The most was 157.7 mm (6.2 in) on 21 July 2010.
Record daily precipitation for each month at Grayson Lake
MonthRecord daily precipitation (mm)Date
Jan65.5 mm (2.6 in)28 January 2009
Feb57.2 mm (2.3 in)6 February 2004
Mar101.6 mm (4.0 in)20 March 2002
Apr71.1 mm (2.8 in)22 April 1972
May109.7 mm (4.3 in)12 May 1986
Jun82.3 mm (3.2 in)5 June 1993
Jul157.7 mm (6.2 in)21 July 2010
Aug91.4 mm (3.6 in)25 August 1999
Sep104.9 mm (4.1 in)6 September 2011
Oct69.1 mm (2.7 in)2 October 1977
Nov85.1 mm (3.4 in)20 November 1988
Dec86.9 mm (3.4 in)9 December 1978

Latest Records

20
Latest records at Grayson Lake
DateStationRecordValueBeat old record byOld record stoodSignificance
27 December 2011Grayson Lake, USdaily rain29.7 mm (1.2 in)21.1 mm (0.8 in)13 years26 of 100 (Routine)
6 December 2011Grayson Lake, USdaily rain17.3 mm (0.7 in)1.3 mm (0.05 in)28 years13 of 100 (Routine)
21 November 2011Grayson Lake, USdaily rain17.0 mm (0.7 in)6.8 mm (0.27 in)28 years18 of 100 (Routine)
20 October 2011Grayson Lake, USdaily rain50.8 mm (2.0 in)22.1 mm (0.9 in)4 years24 of 100 (Routine)
20 September 2011Grayson Lake, USdaily rain24.1 mm (0.9 in)11.9 mm (0.5 in)9 years15 of 100 (Routine)
7 September 2011Grayson Lake, USdaily rain7.1 mm (0.28 in)2.8 mm (0.11 in)40 years18 of 100 (Routine)
6 September 2011Grayson Lake, USmonthly rain104.9 mm (4.1 in)34.8 mm (1.4 in)6 years43 of 100 (Notable)
25 July 2011Grayson Lake, USdaily rain29.7 mm (1.2 in)8.6 mm (0.34 in)32 years18 of 100 (Routine)
12 July 2011Grayson Lake, USdaily rain48.3 mm (1.9 in)23.7 mm (0.9 in)41 years32 of 100 (Routine)
23 April 2011Grayson Lake, USdaily rain28.4 mm (1.1 in)15.4 mm (0.6 in)14 years24 of 100 (Routine)
17 April 2011Grayson Lake, USdaily rain31.8 mm (1.3 in)2.3 mm (0.09 in)12 years9 of 100 (Routine)
12 April 2011Grayson Lake, USdaily rain47.0 mm (1.9 in)36.1 mm (1.4 in)10 years45 of 100 (Notable)
5 April 2011Grayson Lake, USdaily rain37.6 mm (1.5 in)6.1 mm (0.24 in)33 years20 of 100 (Routine)
25 February 2011Grayson Lake, USdaily rain52.1 mm (2.1 in)36.6 mm (1.4 in)32 years51 of 100 (Notable)
1 December 2010Grayson Lake, USdaily rain55.9 mm (2.2 in)20.3 mm (0.8 in)36 years31 of 100 (Routine)
21 July 2010Grayson Lake, USall-time rain157.7 mm (6.2 in)48.0 mm (1.9 in)24 years68 of 100 (Major)
13 June 2010Grayson Lake, USdaily rain32.0 mm (1.3 in)4.3 mm (0.17 in)28 years15 of 100 (Routine)
3 May 2010Grayson Lake, USdaily rain80.8 mm (3.2 in)59.5 mm (2.3 in)24 years51 of 100 (Notable)
26 April 2010Grayson Lake, USdaily rain37.6 mm (1.5 in)8.9 mm (0.35 in)5 years14 of 100 (Routine)
6 April 2010Grayson Lake, USdaily rain21.1 mm (0.8 in)10.7 mm (0.4 in)24 years20 of 100 (Routine)

Extremes by Year

1969 to 2012
Yearly extremes at Grayson Lake: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)157.7 mm (6.2 in)201064.9 mm (2.6 in)44
Wettest five days (Rx5day)195.0 mm (7.7 in)201095.6 mm (3.8 in)44
Longest dry spell (CDD)31 days199516 days44

Wettest day (Rx1day)

Wettest day (Rx1day) at Grayson Lake by year The wettest day of the year at Grayson Lake, 1969 to 2012. The record is 157.7 mm (6.2 in) in 2010, marked on the chart; the median year is 64.9 mm (2.6 in). 05010015020019701980199020002010Record: 157.7 mm (6.2 in) in 2010
The wettest day of the year at Grayson Lake, 1969 to 2012. The record is 157.7 mm (6.2 in) in 2010, marked on the chart; the median year is 64.9 mm (2.6 in).
Wettest day (Rx1day) at Grayson Lake by year
YearWettest day (Rx1day)
196950.8 mm (2.0 in)
197075.7 mm (3.0 in)
197147.0 mm (1.9 in)
197271.1 mm (2.8 in)
197358.4 mm (2.3 in)
197459.7 mm (2.4 in)
197553.3 mm (2.1 in)
197655.1 mm (2.2 in)
197769.1 mm (2.7 in)
197886.9 mm (3.4 in)
197951.3 mm (2.0 in)
198081.5 mm (3.2 in)
198154.6 mm (2.1 in)
198263.8 mm (2.5 in)
198360.2 mm (2.4 in)
198450.0 mm (2.0 in)
198536.8 mm (1.4 in)
1986109.7 mm (4.3 in)
198773.2 mm (2.9 in)
198885.1 mm (3.4 in)
198959.2 mm (2.3 in)
199046.5 mm (1.8 in)
199167.1 mm (2.6 in)
199271.6 mm (2.8 in)
199382.3 mm (3.2 in)
199444.5 mm (1.8 in)
199581.3 mm (3.2 in)
199669.1 mm (2.7 in)
199781.5 mm (3.2 in)
199835.6 mm (1.4 in)
199991.4 mm (3.6 in)
200064.3 mm (2.5 in)
200150.0 mm (2.0 in)
2002101.6 mm (4.0 in)
200383.8 mm (3.3 in)
200470.1 mm (2.8 in)
200563.5 mm (2.5 in)
200666.0 mm (2.6 in)
200752.6 mm (2.1 in)
200841.1 mm (1.6 in)
200965.5 mm (2.6 in)
2010157.7 mm (6.2 in)
2011104.9 mm (4.1 in)
20120.0 mm (0.00 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Grayson Lake by year The wettest five days of the year at Grayson Lake, 1969 to 2012. The record is 195.0 mm (7.7 in) in 2010, marked on the chart; the median year is 95.6 mm (3.8 in). 05010015020019701980199020002010Record: 195.0 mm (7.7 in) in 2010
The wettest five days of the year at Grayson Lake, 1969 to 2012. The record is 195.0 mm (7.7 in) in 2010, marked on the chart; the median year is 95.6 mm (3.8 in).
Wettest five days (Rx5day) at Grayson Lake by year
YearWettest five days (Rx5day)
196972.0 mm (2.8 in)
197075.7 mm (3.0 in)
197192.5 mm (3.6 in)
197291.2 mm (3.6 in)
1973107.5 mm (4.2 in)
1974106.9 mm (4.2 in)
197585.8 mm (3.4 in)
197655.1 mm (2.2 in)
197778.8 mm (3.1 in)
1978138.5 mm (5.5 in)
197985.7 mm (3.4 in)
198096.0 mm (3.8 in)
198168.6 mm (2.7 in)
198299.3 mm (3.9 in)
1983140.3 mm (5.5 in)
198496.7 mm (3.8 in)
198554.3 mm (2.1 in)
1986148.0 mm (5.8 in)
198795.9 mm (3.8 in)
1988139.2 mm (5.5 in)
1989107.9 mm (4.2 in)
199085.4 mm (3.4 in)
1991103.7 mm (4.1 in)
199294.5 mm (3.7 in)
199387.9 mm (3.5 in)
199495.4 mm (3.8 in)
1995157.0 mm (6.2 in)
199685.3 mm (3.4 in)
1997157.5 mm (6.2 in)
199881.3 mm (3.2 in)
199999.0 mm (3.9 in)
200088.4 mm (3.5 in)
2001125.2 mm (4.9 in)
2002145.0 mm (5.7 in)
2003116.4 mm (4.6 in)
2004163.9 mm (6.5 in)
200595.7 mm (3.8 in)
200685.6 mm (3.4 in)
200786.3 mm (3.4 in)
200876.2 mm (3.0 in)
200986.4 mm (3.4 in)
2010195.0 mm (7.7 in)
2011120.2 mm (4.7 in)
201211.7 mm (0.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Grayson Lake by year The longest dry spell of the year at Grayson Lake, 1969 to 2012. The record is 31 days in 1995, marked on the chart; the median year is 16 days. 01020304019701980199020002010Record: 31 days in 1995
The longest dry spell of the year at Grayson Lake, 1969 to 2012. The record is 31 days in 1995, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Grayson Lake by year
YearLongest dry spell (CDD)
196912 days
197014 days
197113 days
197214 days
197315 days
197417 days
197513 days
197621 days
197716 days
197811 days
197914 days
198015 days
198123 days
198212 days
198319 days
198418 days
198517 days
198624 days
198719 days
198821 days
198912 days
199013 days
199113 days
199217 days
199317 days
199422 days
199531 days
199614 days
199716 days
199821 days
199918 days
200011 days
200116 days
200218 days
200314 days
200422 days
200527 days
200611 days
200716 days
200815 days
200920 days
201029 days
201114 days
20129 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

39 years, 1970 to 2010

A day with at least 64.0 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 141.7 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Grayson Lake: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years64.0 mm (2.5 in)
5 years82.3 mm (3.2 in)
10 years95.3 mm (3.8 in)
25 years113.0 mm (4.4 in)
50 years127.0 mm (5.0 in)Longer than the 39 years of record
100 years141.7 mm (5.6 in)Longer than the 39 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, 39 years of values from 1970 to 2010.

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: 157.7 mm (6.2 in) in 2010; 109.7 mm (4.3 in) in 1986; 101.6 mm (4.0 in) in 2002.

Download the Data

  • Data for Grayson Lake standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Grayson Lake 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).