Built 2026-10-16 (16 October 2026)

Loyalhanna Lake Weather Records (USC00365212)

Record envelope, standing records and threshold days for Loyalhanna Lake (USC00365212), Pennsylvania, United States, with 47 years of record.

Key Facts for Loyalhanna Lake

  • Loyalhanna Lake (USC00365212) is a weather station in Pennsylvania, United States at 40.46 latitude and -79.45 longitude, 302 m (990 ft) above sea level.
  • The station reports from 1980 to 2026, 47 years of record.
  • 1,464 records set at Loyalhanna Lake still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Loyalhanna Lake set a daily record low maximum temperature of 21.1 C (70.0 F) on 25 August 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Pennsylvania, United States, 40.46 latitude, -79.45 longitude.
  • Elevation: 302 m (990 ft).
  • Period of record: 1980 to 2026, 47 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

32 days at or beyond a record
Daily record high and record low at Loyalhanna Lake, with 2026 drawn through them The band shows the record high and record low for each calendar day at Loyalhanna Lake. The lines show the 2026 daily maximum and minimum. 32 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Loyalhanna Lake. The lines show the 2026 daily maximum and minimum. 32 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Loyalhanna Lake, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan21.7 C (71.1 F)-30.0 C (-22.0 F)17.8 C (64.0 F)-15.0 C (5.0 F)
Feb25.0 C (77.0 F)-29.4 C (-20.9 F)19.4 C (66.9 F)-25.0 C (-13.0 F)
Mar28.9 C (84.0 F)-20.6 C (-5.1 F)28.9 C (84.0 F)-8.3 C (17.1 F)
Apr32.2 C (90.0 F)-8.9 C (16.0 F)28.9 C (84.0 F)-5.0 C (23.0 F)
May33.9 C (93.0 F)-3.3 C (26.1 F)24.4 C (75.9 F)-1.1 C (30.0 F)
Jun36.1 C (97.0 F)2.2 C (36.0 F)35.0 C (95.0 F)6.1 C (43.0 F)
Jul36.7 C (98.1 F)3.9 C (39.0 F)35.0 C (95.0 F)8.9 C (48.0 F)
Aug35.6 C (96.1 F)5.6 C (42.1 F)31.1 C (88.0 F)9.4 C (48.9 F)
Sep36.1 C (97.0 F)-1.1 C (30.0 F)n/an/a
Oct32.2 C (90.0 F)-10.0 C (14.0 F)n/an/a
Nov27.2 C (81.0 F)-15.6 C (3.9 F)n/an/a
Dec22.8 C (73.0 F)-27.8 C (-18.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Loyalhanna Lake by the year they were set 1,464 records at Loyalhanna Lake still stand. 1991 holds the most, with 90. 02550751001989: 461990: 551991: 901992: 691993: 471994: 371995: 291996: 391997: 391998: 391999: 372000: 372001: 462002: 442003: 222004: 232005: 322006: 222007: 372008: 252009: 332010: 292011: 182012: 292013: 402014: 602015: 532016: 392017: 492018: 502019: 272020: 262021: 282022: 242023: 272024: 512025: 302026: 361989199319972001200520092013201720212025
1,464 records at Loyalhanna Lake still stand. 1991 holds the most, with 90.
Standing records at Loyalhanna Lake by the year they were set
Year setStanding records
198946
199055
199190
199269
199347
199437
199529
199639
199739
199839
199937
200037
200146
200244
200322
200423
200532
200622
200737
200825
200933
201029
201118
201229
201340
201460
201553
201639
201749
201850
201927
202026
202128
202224
202327
202451
202530
202636

Wettest Day of Each Month

Sep: 133.9 mm (5.3 in)
Record daily precipitation for each month at Loyalhanna Lake The wettest day on record for each calendar month at Loyalhanna Lake. The most was 133.9 mm (5.3 in) on 18 September 2004. 050100150 Jan: 127.0 mm (5.0 in), 26 January 2004 Jan Feb: 50.8 mm (2.0 in), 2 February 1988 Feb Mar: 43.2 mm (1.7 in), 19 March 2021 Mar Apr: 59.4 mm (2.3 in), 10 April 1999 Apr May: 49.5 mm (1.9 in), 3 May 1985 May Jun: 77.5 mm (3.1 in), 21 June 2018 Jun Jul: 101.6 mm (4.0 in), 9 July 1986 Jul Aug: 100.3 mm (3.9 in), 29 August 2013 Aug Sep: 133.9 mm (5.3 in), 18 September 2004 Sep Oct: 66.0 mm (2.6 in), 30 October 2012 Oct Nov: 58.4 mm (2.3 in), 13 November 2022 Nov Dec: 59.4 mm (2.3 in), 1 December 2010 Dec
The wettest day on record for each calendar month at Loyalhanna Lake. The most was 133.9 mm (5.3 in) on 18 September 2004.
Record daily precipitation for each month at Loyalhanna Lake
MonthRecord daily precipitation (mm)Date
Jan127.0 mm (5.0 in)26 January 2004
Feb50.8 mm (2.0 in)2 February 1988
Mar43.2 mm (1.7 in)19 March 2021
Apr59.4 mm (2.3 in)10 April 1999
May49.5 mm (1.9 in)3 May 1985
Jun77.5 mm (3.1 in)21 June 2018
Jul101.6 mm (4.0 in)9 July 1986
Aug100.3 mm (3.9 in)29 August 2013
Sep133.9 mm (5.3 in)18 September 2004
Oct66.0 mm (2.6 in)30 October 2012
Nov58.4 mm (2.3 in)13 November 2022
Dec59.4 mm (2.3 in)1 December 2010

Period of Record Coverage

1989 to 2026
Days with data per year at Loyalhanna Lake 38 years of record at Loyalhanna Lake, 1989 to 2026. 28 years have data for under 90 percent of days and are left out of rankings: 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998 and others. 1989: 174 of 365 days1990: 344 of 365 days1991: 341 of 365 days1992: 313 of 366 days1993: 325 of 365 days1994: 284 of 365 days1995: 187 of 365 days1996: 254 of 366 days1997: 292 of 365 days1998: 316 of 365 days1999: 267 of 365 days2000: 326 of 366 days2001: 298 of 365 days2002: 220 of 365 days2003: 271 of 365 days2004: 299 of 366 days2005: 237 of 365 days2006: 253 of 365 days2007: 228 of 365 days2008: 277 of 366 days2009: 275 of 365 days2010: 294 of 365 days2011: 171 of 365 days2012: 248 of 366 days2013: 293 of 365 days2014: 321 of 365 days2015: 327 of 365 days2016: 328 of 366 days2017: 350 of 365 days2018: 323 of 365 days2019: 364 of 365 days2020: 348 of 366 days2021: 331 of 365 days2022: 341 of 365 days2023: 345 of 365 days2024: 366 of 366 days2025: 349 of 365 days2026: 193 of 365 days19901995200020052010201520202025
38 years of record at Loyalhanna Lake, 1989 to 2026. 28 years have data for under 90 percent of days and are left out of rankings: 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998 and others.
Days with data per year at Loyalhanna Lake
YearDays with dataShare of yearComplete
198917448%No
199034494%Yes
199134193%Yes
199231386%No
199332589%No
199428478%No
199518751%No
199625469%No
199729280%No
199831687%No
199926773%No
200032689%No
200129882%No
200222060%No
200327174%No
200429982%No
200523765%No
200625369%No
200722862%No
200827776%No
200927575%No
201029481%No
201117147%No
201224868%No
201329380%No
201432188%No
201532790%No
201632890%No
201735096%Yes
201832388%No
2019364100%Yes
202034895%Yes
202133191%Yes
202234193%Yes
202334595%Yes
2024366100%Yes
202534996%Yes
202619353%No

Latest Records

20
Latest records at Loyalhanna Lake
DateStationRecordValueBeat old record byOld record stoodSignificance
25 August 2026Loyalhanna Lake, USdaily low max (Provisional)21.1 C (70.0 F)0.6 C (1.1 F)8 years7 of 100 (Routine)
19 August 2026Loyalhanna Lake, USdaily low min (Tie, Provisional)10.0 C (50.0 F)tie28 years2 of 100 (Routine)
18 August 2026Loyalhanna Lake, USdaily low min (Provisional)9.4 C (48.9 F)1.7 C (3.1 F)19 years13 of 100 (Routine)
8 August 2026Loyalhanna Lake, USdaily rain34.3 mm (1.4 in)16.5 mm (0.6 in)19 years21 of 100 (Routine)
31 July 2026Loyalhanna Lake, USdaily low min8.9 C (48.0 F)1.1 C (2.0 F)12 years9 of 100 (Routine)
24 July 2026Loyalhanna Lake, USdaily low min10.6 C (51.1 F)1.6 C (2.9 F)11 years10 of 100 (Routine)
23 July 2026Loyalhanna Lake, USdaily low min10.6 C (51.1 F)0.5 C (0.9 F)25 years11 of 100 (Routine)
23 July 2026Loyalhanna Lake, USdaily low max (Tie)23.3 C (73.9 F)tie23 years2 of 100 (Routine)
19 July 2026Loyalhanna Lake, USdaily rain18.5 mm (0.7 in)2.5 mm (0.10 in)13 years10 of 100 (Routine)
6 July 2026Loyalhanna Lake, USdaily rain30.2 mm (1.2 in)16.2 mm (0.6 in)24 years24 of 100 (Routine)
4 July 2026Loyalhanna Lake, USdaily high max35.0 C (95.0 F)0.6 C (1.1 F)27 years13 of 100 (Routine)
3 July 2026Loyalhanna Lake, USdaily high min22.2 C (72.0 F)2.2 C (4.0 F)27 years17 of 100 (Routine)
3 July 2026Loyalhanna Lake, USdaily high max (Tie)34.4 C (93.9 F)tie24 years2 of 100 (Routine)
2 July 2026Loyalhanna Lake, USdaily high max33.9 C (93.0 F)0.6 C (1.1 F)13 years9 of 100 (Routine)
2 July 2026Loyalhanna Lake, USdaily high min (Tie)21.7 C (71.1 F)tie12 years1 of 100 (Routine)
1 July 2026Loyalhanna Lake, USdaily high max32.8 C (91.0 F)0.6 C (1.1 F)29 years13 of 100 (Routine)
23 June 2026Loyalhanna Lake, USdaily rain30.5 mm (1.2 in)2.1 mm (0.08 in)36 years17 of 100 (Routine)
20 June 2026Loyalhanna Lake, USdaily low min7.8 C (46.0 F)0.5 C (0.9 F)21 years10 of 100 (Routine)
17 June 2026Loyalhanna Lake, USdaily low min8.3 C (46.9 F)0.6 C (1.1 F)27 years12 of 100 (Routine)
16 June 2026Loyalhanna Lake, USdaily low max20.6 C (69.1 F)1.1 C (2.0 F)20 years11 of 100 (Routine)

Climate Trend

13 complete years, 1990 to 2025
Annual mean temperature at Loyalhanna Lake as warming stripes, 1990 to 2025 One stripe for each of 13 complete years at Loyalhanna Lake, 1990 to 2025. Blue stripes are years cooler than the station's own mean of 10.7 C (51.3 F); red stripes are warmer. The coolest year was 2014, at 8.8 C (47.8 F), and the warmest was 2024, at 12.0 C (53.7 F). The strongest colour marks a difference of 2.0 C (3.6 F). 1990: 11.9 C, +1.1 C from the station mean1991: 11.8 C, +1.0 C from the station mean1993: 11.2 C, +0.5 C from the station mean1994: 11.2 C, +0.5 C from the station mean2013: 10.0 C, -0.7 C from the station mean2014: 8.8 C, -1.9 C from the station mean2015: 10.0 C, -0.7 C from the station mean2017: 10.8 C, 0.0 C from the station mean2019: 10.4 C, -0.4 C from the station mean2022: 9.9 C, -0.8 C from the station mean2023: 11.2 C, +0.5 C from the station mean2024: 12.0 C, +1.3 C from the station mean2025: 10.4 C, -0.3 C from the station mean19901995200020052010201520202025
One stripe for each of 13 complete years at Loyalhanna Lake, 1990 to 2025. Blue stripes are years cooler than the station's own mean of 10.7 C (51.3 F); red stripes are warmer. The coolest year was 2014, at 8.8 C (47.8 F), and the warmest was 2024, at 12.0 C (53.7 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Loyalhanna Lake as warming stripes, 1990 to 2025
YearAnnual mean temperatureDifference from the station mean
199011.9 C+1.14 C
199111.8 C+1.03 C
199311.2 C+0.46 C
199411.2 C+0.47 C
201310.0 C-0.71 C
20148.8 C-1.94 C
201510.0 C-0.75 C
201710.8 C+0.01 C
201910.4 C-0.37 C
20229.9 C-0.82 C
202311.2 C+0.46 C
202412.0 C+1.30 C
202510.4 C-0.31 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

1980 to 2026
Yearly extremes at Loyalhanna Lake: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)36.7 C (98.1 F)201234.2 C (93.5 F)38
Coldest night (TNn)-30.0 C (-22.0 F)1994-20.0 C (-4.0 F)38
Wettest day (Rx1day)133.9 mm (5.3 in)200450.8 mm (2.0 in)47
Wettest five days (Rx5day)142.9 mm (5.6 in)200587.0 mm (3.4 in)47
Longest dry spell (CDD)31 days198514 days47

Hottest day (TXx)

Hottest day (TXx) at Loyalhanna Lake by year The hottest day of the year at Loyalhanna Lake, 1980 to 2026. The record is 36.7 C (98.1 F) in 2012, marked on the chart; the median year is 34.2 C (93.5 F). 303234363819801990200020102020Record: 36.7 C (98.1 F) in 2012
The hottest day of the year at Loyalhanna Lake, 1980 to 2026. The record is 36.7 C (98.1 F) in 2012, marked on the chart; the median year is 34.2 C (93.5 F).
Hottest day (TXx) at Loyalhanna Lake by year
YearHottest day (TXx)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
198934.4 C (93.9 F)
199035.6 C (96.1 F)
199135.6 C (96.1 F)
199233.3 C (91.9 F)
199334.4 C (93.9 F)
199435.6 C (96.1 F)
199533.3 C (91.9 F)
199633.3 C (91.9 F)
199734.4 C (93.9 F)
199833.9 C (93.0 F)
199936.1 C (97.0 F)
200033.3 C (91.9 F)
200135.6 C (96.1 F)
200236.1 C (97.0 F)
200332.2 C (90.0 F)
200436.1 C (97.0 F)
200535.0 C (95.0 F)
200635.0 C (95.0 F)
200734.4 C (93.9 F)
200833.9 C (93.0 F)
200933.3 C (91.9 F)
201034.4 C (93.9 F)
201132.2 C (90.0 F)
201236.7 C (98.1 F)
201332.8 C (91.0 F)
201431.1 C (88.0 F)
201532.8 C (91.0 F)
201633.3 C (91.9 F)
201734.4 C (93.9 F)
201833.9 C (93.0 F)
201932.8 C (91.0 F)
202034.4 C (93.9 F)
202132.8 C (91.0 F)
202232.8 C (91.0 F)
202333.3 C (91.9 F)
202435.0 C (95.0 F)
202533.9 C (93.0 F)
202635.0 C (95.0 F)

Coldest night (TNn)

Coldest night (TNn) at Loyalhanna Lake by year The coldest night of the year at Loyalhanna Lake, 1980 to 2026. The record is -30.0 C (-22.0 F) in 1994, marked on the chart; the median year is -20.0 C (-4.0 F). -30-25-20-15-1019801990200020102020Record: -30.0 C (-22.0 F) in 1994
The coldest night of the year at Loyalhanna Lake, 1980 to 2026. The record is -30.0 C (-22.0 F) in 1994, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Loyalhanna Lake by year
YearColdest night (TNn)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989-27.8 C (-18.0 F)
1990-13.9 C (7.0 F)
1991-17.8 C (0.0 F)
1992-21.7 C (-7.1 F)
1993-20.0 C (-4.0 F)
1994-30.0 C (-22.0 F)
1995-18.3 C (-0.9 F)
1996-22.2 C (-8.0 F)
1997-20.0 C (-4.0 F)
1998-16.7 C (1.9 F)
1999-17.8 C (0.0 F)
2000-16.7 C (1.9 F)
2001-15.0 C (5.0 F)
2002-15.0 C (5.0 F)
2003-21.1 C (-6.0 F)
2004-22.2 C (-8.0 F)
2005-21.1 C (-6.0 F)
2006-12.2 C (10.0 F)
2007-20.6 C (-5.1 F)
2008-16.7 C (1.9 F)
2009-21.1 C (-6.0 F)
2010-25.0 C (-13.0 F)
2011-23.9 C (-11.0 F)
2012-14.4 C (6.1 F)
2013-15.0 C (5.0 F)
2014-25.0 C (-13.0 F)
2015-29.4 C (-20.9 F)
2016-21.1 C (-6.0 F)
2017-17.8 C (0.0 F)
2018-25.0 C (-13.0 F)
2019-20.0 C (-4.0 F)
2020-13.3 C (8.1 F)
2021-15.6 C (3.9 F)
2022-23.3 C (-9.9 F)
2023-15.0 C (5.0 F)
2024-17.8 C (0.0 F)
2025-26.1 C (-15.0 F)
2026-25.0 C (-13.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Loyalhanna Lake by year The wettest day of the year at Loyalhanna Lake, 1980 to 2026. The record is 133.9 mm (5.3 in) in 2004, marked on the chart; the median year is 50.8 mm (2.0 in). 05010015019801990200020102020Record: 133.9 mm (5.3 in) in 2004
The wettest day of the year at Loyalhanna Lake, 1980 to 2026. The record is 133.9 mm (5.3 in) in 2004, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest day (Rx1day) at Loyalhanna Lake by year
YearWettest day (Rx1day)
198048.8 mm (1.9 in)
198152.1 mm (2.1 in)
198237.3 mm (1.5 in)
198350.3 mm (2.0 in)
198448.3 mm (1.9 in)
198549.5 mm (1.9 in)
1986101.6 mm (4.0 in)
198751.8 mm (2.0 in)
198850.8 mm (2.0 in)
198941.1 mm (1.6 in)
199044.2 mm (1.7 in)
199151.3 mm (2.0 in)
199244.7 mm (1.8 in)
199355.1 mm (2.2 in)
199459.4 mm (2.3 in)
199533.8 mm (1.3 in)
199653.6 mm (2.1 in)
199754.4 mm (2.1 in)
199836.8 mm (1.4 in)
199976.2 mm (3.0 in)
200085.1 mm (3.4 in)
200143.2 mm (1.7 in)
200239.1 mm (1.5 in)
200345.7 mm (1.8 in)
2004133.9 mm (5.3 in)
200580.5 mm (3.2 in)
200640.9 mm (1.6 in)
200785.3 mm (3.4 in)
200844.7 mm (1.8 in)
200940.9 mm (1.6 in)
201099.6 mm (3.9 in)
201174.4 mm (2.9 in)
201266.0 mm (2.6 in)
2013100.3 mm (3.9 in)
201447.8 mm (1.9 in)
201564.8 mm (2.6 in)
201645.7 mm (1.8 in)
201743.2 mm (1.7 in)
201877.5 mm (3.1 in)
201942.4 mm (1.7 in)
202040.1 mm (1.6 in)
202172.4 mm (2.9 in)
202278.0 mm (3.1 in)
202359.4 mm (2.3 in)
202451.3 mm (2.0 in)
202538.1 mm (1.5 in)
202634.3 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Loyalhanna Lake by year The wettest five days of the year at Loyalhanna Lake, 1980 to 2026. The record is 142.9 mm (5.6 in) in 2005, marked on the chart; the median year is 87.0 mm (3.4 in). 25507510012515019801990200020102020Record: 142.9 mm (5.6 in) in 2005
The wettest five days of the year at Loyalhanna Lake, 1980 to 2026. The record is 142.9 mm (5.6 in) in 2005, marked on the chart; the median year is 87.0 mm (3.4 in).
Wettest five days (Rx5day) at Loyalhanna Lake by year
YearWettest five days (Rx5day)
198078.7 mm (3.1 in)
1981134.1 mm (5.3 in)
198264.6 mm (2.5 in)
198362.3 mm (2.5 in)
198471.5 mm (2.8 in)
1985115.9 mm (4.6 in)
1986142.5 mm (5.6 in)
198771.3 mm (2.8 in)
198887.0 mm (3.4 in)
198988.6 mm (3.5 in)
199077.9 mm (3.1 in)
199157.1 mm (2.2 in)
1992123.0 mm (4.8 in)
199357.6 mm (2.3 in)
199489.1 mm (3.5 in)
199555.7 mm (2.2 in)
199666.5 mm (2.6 in)
1997113.4 mm (4.5 in)
199849.3 mm (1.9 in)
199984.6 mm (3.3 in)
2000101.6 mm (4.0 in)
200166.1 mm (2.6 in)
200255.4 mm (2.2 in)
2003105.2 mm (4.1 in)
2004137.7 mm (5.4 in)
2005142.9 mm (5.6 in)
200671.1 mm (2.8 in)
2007113.2 mm (4.5 in)
200886.3 mm (3.4 in)
200950.8 mm (2.0 in)
2010100.9 mm (4.0 in)
2011123.2 mm (4.9 in)
2012120.4 mm (4.7 in)
2013134.2 mm (5.3 in)
201457.9 mm (2.3 in)
2015129.8 mm (5.1 in)
201668.3 mm (2.7 in)
201792.0 mm (3.6 in)
2018103.7 mm (4.1 in)
201992.7 mm (3.6 in)
202098.9 mm (3.9 in)
202182.6 mm (3.3 in)
2022123.4 mm (4.9 in)
202385.0 mm (3.3 in)
2024109.0 mm (4.3 in)
202577.7 mm (3.1 in)
202684.3 mm (3.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Loyalhanna Lake by year The longest dry spell of the year at Loyalhanna Lake, 1980 to 2026. The record is 31 days in 1985, marked on the chart; the median year is 14 days. 01020304019801990200020102020Record: 31 days in 1985
The longest dry spell of the year at Loyalhanna Lake, 1980 to 2026. The record is 31 days in 1985, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Loyalhanna Lake by year
YearLongest dry spell (CDD)
19809 days
198115 days
198217 days
198322 days
198411 days
198531 days
198612 days
198719 days
198822 days
198911 days
199013 days
199116 days
199215 days
199312 days
199416 days
199512 days
199610 days
199716 days
199812 days
199916 days
200015 days
200115 days
200220 days
200315 days
200412 days
200515 days
200616 days
200716 days
200813 days
200915 days
201018 days
20116 days
20129 days
20138 days
201411 days
201512 days
201610 days
201714 days
201811 days
201911 days
202014 days
202111 days
202216 days
202313 days
202412 days
202517 days
20268 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

36 years, 1981 to 2025

A day with at least 48.8 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 153.8 mm (6.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Loyalhanna Lake: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years48.8 mm (1.9 in)
5 years62.6 mm (2.5 in)
10 years75.8 mm (3.0 in)
25 years99.1 mm (3.9 in)
50 years122.8 mm (4.8 in)Longer than the 36 years of record
100 years153.8 mm (6.1 in)Longer than the 36 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, 36 years of values from 1981 to 2025.

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: 133.9 mm (5.3 in) in 2004; 101.6 mm (4.0 in) in 1986; 99.6 mm (3.9 in) in 2010.

Download the Data

  • Data for Loyalhanna Lake standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Loyalhanna 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 (2026-10-14).