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Blue Marsh Lake Weather Records (USC00360785)

Record envelope, standing records and threshold days for Blue Marsh Lake (USC00360785), Pennsylvania, United States, with 49 years of record.

Key Facts for Blue Marsh Lake

  • Blue Marsh Lake (USC00360785) is a weather station in Pennsylvania, United States at 40.38 latitude and -76.03 longitude, 107 m (350 ft) above sea level.
  • The station reports from 1978 to 2026, 49 years of record.
  • 1,464 records set at Blue Marsh Lake still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Blue Marsh Lake set a daily record precipitation of 33.8 mm (1.3 in) on 17 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, 40.38 latitude, -76.03 longitude.
  • Elevation: 107 m (350 ft).
  • Period of record: 1978 to 2026, 49 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

16 days at or beyond a record
Daily record high and record low at Blue Marsh Lake, with 2026 drawn through them The band shows the record high and record low for each calendar day at Blue Marsh Lake. The lines show the 2026 daily maximum and minimum. 16 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 Blue Marsh Lake. The lines show the 2026 daily maximum and minimum. 16 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Blue Marsh Lake, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan21.1 C (70.0 F)-33.9 C (-29.0 F)11.1 C (52.0 F)-21.7 C (-7.1 F)
Feb26.7 C (80.1 F)-24.4 C (-11.9 F)10.0 C (50.0 F)-18.3 C (-0.9 F)
Mar29.4 C (84.9 F)-21.1 C (-6.0 F)26.7 C (80.1 F)-7.2 C (19.0 F)
Apr32.2 C (90.0 F)-9.4 C (15.1 F)31.7 C (89.1 F)-4.4 C (24.1 F)
May35.0 C (95.0 F)-1.7 C (28.9 F)34.4 C (93.9 F)1.1 C (34.0 F)
Jun37.8 C (100.0 F)1.7 C (35.1 F)33.9 C (93.0 F)7.2 C (45.0 F)
Jul39.4 C (102.9 F)7.8 C (46.0 F)38.9 C (102.0 F)10.6 C (51.1 F)
Aug38.3 C (100.9 F)4.4 C (39.9 F)33.9 C (93.0 F)11.7 C (53.1 F)
Sep36.1 C (97.0 F)-1.1 C (30.0 F)32.8 C (91.0 F)5.6 C (42.1 F)
Oct32.8 C (91.0 F)-6.1 C (21.0 F)28.3 C (82.9 F)2.2 C (36.0 F)
Nov27.2 C (81.0 F)-12.2 C (10.0 F)n/an/a
Dec22.8 C (73.0 F)-18.9 C (-2.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Blue Marsh Lake by the year they were set 1,464 records at Blue Marsh Lake still stand. 2015 holds the most, with 48. 02040601978: 131979: 391980: 381981: 261982: 431983: 311984: 461985: 331986: 311987: 291988: 431989: 331990: 381991: 431992: 471993: 331994: 281995: 281996: 311997: 221998: 381999: 302000: 372001: 262002: 302003: 212004: 212005: 402006: 312007: 282008: 222009: 22010: 252011: 272012: 252013: 192014: 312015: 482016: 312017: 332018: 352019: 162020: 232021: 342022: 292023: 212024: 182025: 242026: 241978198319881993199820032008201320182023
1,464 records at Blue Marsh Lake still stand. 2015 holds the most, with 48.
Standing records at Blue Marsh Lake by the year they were set
Year setStanding records
197813
197939
198038
198126
198243
198331
198446
198533
198631
198729
198843
198933
199038
199143
199247
199333
199428
199528
199631
199722
199838
199930
200037
200126
200230
200321
200421
200540
200631
200728
200822
20092
201025
201127
201225
201319
201431
201548
201631
201733
201835
201916
202023
202134
202229
202321
202418
202524
202624

All-Time Record Progression

3 new records
When Blue Marsh Lake set new all-time records 3 all-time records were set at Blue Marsh Lake between 1 October 2010 and 25 January 2016. Each dot is a new record. Record daily precipitationRecord high maximum temperatureRecord daily snowfall1 October 2010: Record daily precipitation 153.2 mm (6.0 in)23 July 2011: Record high maximum temperature 39.4 C (102.9 F)25 January 2016: Record daily snowfall 71.1 cm (28.0 in)20102015
3 all-time records were set at Blue Marsh Lake between 1 October 2010 and 25 January 2016. Each dot is a new record.
When Blue Marsh Lake set new all-time records
DateKindDetail
2010-10-01Record daily precipitationRecord daily precipitation 153.2 mm (6.0 in)
2011-07-23Record high maximum temperatureRecord high maximum temperature 39.4 C (102.9 F)
2016-01-25Record daily snowfallRecord daily snowfall 71.1 cm (28.0 in)

Wettest Day of Each Month

Oct: 153.2 mm (6.0 in)
Record daily precipitation for each month at Blue Marsh Lake The wettest day on record for each calendar month at Blue Marsh Lake. The most was 153.2 mm (6.0 in) on 1 October 2010. 050100150200 Jan: 61.5 mm (2.4 in), 4 January 1982 Jan Feb: 66.0 mm (2.6 in), 15 February 2007 Feb Mar: 84.1 mm (3.3 in), 22 March 2000 Mar Apr: 76.5 mm (3.0 in), 16 April 1983 Apr May: 105.2 mm (4.1 in), 6 May 1989 May Jun: 102.9 mm (4.1 in), 7 June 1994 Jun Jul: 102.1 mm (4.0 in), 23 July 2013 Jul Aug: 115.3 mm (4.5 in), 4 August 2018 Aug Sep: 124.0 mm (4.9 in), 9 September 1987 Sep Oct: 153.2 mm (6.0 in), 1 October 2010 Oct Nov: 65.5 mm (2.6 in), 23 November 2011 Nov Dec: 90.4 mm (3.6 in), 13 December 1983 Dec
The wettest day on record for each calendar month at Blue Marsh Lake. The most was 153.2 mm (6.0 in) on 1 October 2010.
Record daily precipitation for each month at Blue Marsh Lake
MonthRecord daily precipitation (mm)Date
Jan61.5 mm (2.4 in)4 January 1982
Feb66.0 mm (2.6 in)15 February 2007
Mar84.1 mm (3.3 in)22 March 2000
Apr76.5 mm (3.0 in)16 April 1983
May105.2 mm (4.1 in)6 May 1989
Jun102.9 mm (4.1 in)7 June 1994
Jul102.1 mm (4.0 in)23 July 2013
Aug115.3 mm (4.5 in)4 August 2018
Sep124.0 mm (4.9 in)9 September 1987
Oct153.2 mm (6.0 in)1 October 2010
Nov65.5 mm (2.6 in)23 November 2011
Dec90.4 mm (3.6 in)13 December 1983

Period of Record Coverage

1978 to 2026
Days with data per year at Blue Marsh Lake 49 years of record at Blue Marsh Lake, 1978 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1978, 1986, 1987, 1988, 1989, 2002, 2003, 2009 and others. 1978: 212 of 365 days1979: 329 of 365 days1980: 365 of 366 days1981: 353 of 365 days1982: 350 of 365 days1983: 354 of 365 days1984: 350 of 366 days1985: 332 of 365 days1986: 249 of 365 days1987: 250 of 365 days1988: 285 of 366 days1989: 271 of 365 days1990: 346 of 365 days1991: 352 of 365 days1992: 335 of 366 days1993: 360 of 365 days1994: 353 of 365 days1995: 354 of 365 days1996: 356 of 366 days1997: 352 of 365 days1998: 361 of 365 days1999: 357 of 365 days2000: 361 of 366 days2001: 363 of 365 days2002: 263 of 365 days2003: 323 of 365 days2004: 354 of 366 days2005: 357 of 365 days2006: 338 of 365 days2007: 362 of 365 days2008: 359 of 366 days2009: 152 of 365 days2010: 362 of 365 days2011: 364 of 365 days2012: 361 of 366 days2013: 360 of 365 days2014: 361 of 365 days2015: 363 of 365 days2016: 365 of 366 days2017: 353 of 365 days2018: 354 of 365 days2019: 361 of 365 days2020: 366 of 366 days2021: 361 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 359 of 366 days2025: 354 of 365 days2026: 281 of 365 days19801990200020102020
49 years of record at Blue Marsh Lake, 1978 to 2026. 9 years have data for under 90 percent of days and are left out of rankings: 1978, 1986, 1987, 1988, 1989, 2002, 2003, 2009 and others.
Days with data per year at Blue Marsh Lake
YearDays with dataShare of yearComplete
197821258%No
197932990%Yes
1980365100%Yes
198135397%Yes
198235096%Yes
198335497%Yes
198435096%Yes
198533291%Yes
198624968%No
198725068%No
198828578%No
198927174%No
199034695%Yes
199135296%Yes
199233592%Yes
199336099%Yes
199435397%Yes
199535497%Yes
199635697%Yes
199735296%Yes
199836199%Yes
199935798%Yes
200036199%Yes
200136399%Yes
200226372%No
200332388%No
200435497%Yes
200535798%Yes
200633893%Yes
200736299%Yes
200835998%Yes
200915242%No
201036299%Yes
2011364100%Yes
201236199%Yes
201336099%Yes
201436199%Yes
201536399%Yes
2016365100%Yes
201735397%Yes
201835497%Yes
201936199%Yes
2020366100%Yes
202136199%Yes
2022365100%Yes
2023365100%Yes
202435998%Yes
202535497%Yes
202628177%No

Latest Records

20
Latest records at Blue Marsh Lake
DateStationRecordValueBeat old record byOld record stoodSignificance
17 August 2026Blue Marsh Lake, USdaily rain (Provisional)33.8 mm (1.3 in)24.1 mm (0.9 in)32 years28 of 100 (Routine)
7 August 2026Blue Marsh Lake, USdaily high max (Tie)33.3 C (91.9 F)tie4 years1 of 100 (Routine)
8 July 2026Blue Marsh Lake, USdaily low max (Tie)24.4 C (75.9 F)tie41 years4 of 100 (Routine)
7 July 2026Blue Marsh Lake, USdaily low max23.3 C (73.9 F)0.6 C (1.1 F)47 years19 of 100 (Routine)
4 July 2026Blue Marsh Lake, USdaily high max37.8 C (100.0 F)2.2 C (4.0 F)27 years18 of 100 (Routine)
3 July 2026Blue Marsh Lake, USdaily high max38.9 C (102.0 F)3.3 C (5.9 F)8 years15 of 100 (Routine)
3 July 2026Blue Marsh Lake, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)35 years15 of 100 (Routine)
2 July 2026Blue Marsh Lake, USdaily high max37.2 C (99.0 F)1.6 C (2.9 F)8 years10 of 100 (Routine)
2 July 2026Blue Marsh Lake, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)8 years7 of 100 (Routine)
1 July 2026Blue Marsh Lake, USdaily high min (Tie)21.1 C (70.0 F)tie0 years1 of 100 (Routine)
13 June 2026Blue Marsh Lake, USdaily high max33.9 C (93.0 F)1.1 C (2.0 F)11 years9 of 100 (Routine)
24 May 2026Blue Marsh Lake, USdaily low max10.0 C (50.0 F)2.8 C (5.0 F)23 years15 of 100 (Routine)
20 May 2026Blue Marsh Lake, USdaily high max34.4 C (93.9 F)0.5 C (0.9 F)29 years12 of 100 (Routine)
19 May 2026Blue Marsh Lake, USdaily high max34.4 C (93.9 F)2.2 C (4.0 F)40 years20 of 100 (Routine)
19 May 2026Blue Marsh Lake, USdaily high min18.3 C (64.9 F)0.5 C (0.9 F)21 years11 of 100 (Routine)
18 May 2026Blue Marsh Lake, USdaily high max (Tie)30.0 C (86.0 F)tie28 years3 of 100 (Routine)
18 May 2026Blue Marsh Lake, USdaily high min (Tie)15.6 C (60.1 F)tie21 years2 of 100 (Routine)
6 May 2026Blue Marsh Lake, USdaily high min (Tie)15.6 C (60.1 F)tie0 years1 of 100 (Routine)
21 April 2026Blue Marsh Lake, USdaily low min-3.9 C (25.0 F)1.1 C (2.0 F)8 years8 of 100 (Routine)
17 April 2026Blue Marsh Lake, USdaily high max31.7 C (89.1 F)1.1 C (2.0 F)24 years12 of 100 (Routine)

Climate Trend

37 complete years, 1979 to 2025
Annual mean temperature at Blue Marsh Lake as warming stripes, 1979 to 2025 One stripe for each of 37 complete years at Blue Marsh Lake, 1979 to 2025. Blue stripes are years cooler than the station's own mean of 10.8 C (51.5 F); red stripes are warmer. The coolest year was 1992, at 9.0 C (48.2 F), and the warmest was 1998, at 12.3 C (54.2 F). The strongest colour marks a difference of 1.9 C (3.4 F). 1979: 10.4 C, -0.4 C from the station mean1980: 10.3 C, -0.6 C from the station mean1981: 10.0 C, -0.8 C from the station mean1982: 9.4 C, -1.5 C from the station mean1983: 10.0 C, -0.9 C from the station mean1984: 10.1 C, -0.7 C from the station mean1991: 10.9 C, 0.0 C from the station mean1992: 9.0 C, -1.9 C from the station mean1993: 10.5 C, -0.3 C from the station mean1994: 10.3 C, -0.6 C from the station mean1995: 10.7 C, -0.2 C from the station mean1996: 10.1 C, -0.7 C from the station mean1997: 10.2 C, -0.6 C from the station mean1998: 12.3 C, +1.5 C from the station mean1999: 11.4 C, +0.5 C from the station mean2000: 9.8 C, -1.1 C from the station mean2001: 10.7 C, -0.2 C from the station mean2004: 10.8 C, -0.1 C from the station mean2005: 11.5 C, +0.7 C from the station mean2007: 10.8 C, 0.0 C from the station mean2008: 10.6 C, -0.2 C from the station mean2010: 11.6 C, +0.8 C from the station mean2011: 11.5 C, +0.7 C from the station mean2012: 12.1 C, +1.2 C from the station mean2013: 10.7 C, -0.2 C from the station mean2014: 9.6 C, -1.3 C from the station mean2015: 10.8 C, 0.0 C from the station mean2016: 11.7 C, +0.9 C from the station mean2017: 11.5 C, +0.6 C from the station mean2018: 11.2 C, +0.3 C from the station mean2019: 11.4 C, +0.5 C from the station mean2020: 12.1 C, +1.3 C from the station mean2021: 11.9 C, +1.1 C from the station mean2022: 11.0 C, +0.2 C from the station mean2023: 11.8 C, +0.9 C from the station mean2024: 11.8 C, +1.0 C from the station mean2025: 10.8 C, 0.0 C from the station mean1979198519901995200020052010201520202025
One stripe for each of 37 complete years at Blue Marsh Lake, 1979 to 2025. Blue stripes are years cooler than the station's own mean of 10.8 C (51.5 F); red stripes are warmer. The coolest year was 1992, at 9.0 C (48.2 F), and the warmest was 1998, at 12.3 C (54.2 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Blue Marsh Lake as warming stripes, 1979 to 2025
YearAnnual mean temperatureDifference from the station mean
197910.4 C-0.44 C
198010.3 C-0.59 C
198110.0 C-0.84 C
19829.4 C-1.47 C
198310.0 C-0.89 C
198410.1 C-0.74 C
199110.9 C+0.03 C
19929.0 C-1.86 C
199310.5 C-0.30 C
199410.3 C-0.59 C
199510.7 C-0.17 C
199610.1 C-0.73 C
199710.2 C-0.65 C
199812.3 C+1.47 C
199911.4 C+0.53 C
20009.8 C-1.08 C
200110.7 C-0.18 C
200410.8 C-0.07 C
200511.5 C+0.67 C
200710.8 C+0.00 C
200810.6 C-0.20 C
201011.6 C+0.79 C
201111.5 C+0.67 C
201212.1 C+1.22 C
201310.7 C-0.18 C
20149.6 C-1.28 C
201510.8 C-0.03 C
201611.7 C+0.89 C
201711.5 C+0.63 C
201811.2 C+0.31 C
201911.4 C+0.52 C
202012.1 C+1.26 C
202111.9 C+1.10 C
202211.0 C+0.20 C
202311.8 C+0.94 C
202411.8 C+0.95 C
202510.8 C-0.02 C

The annual mean temperature here has risen by 0.4 C (0.2 to 0.5) per decade over 1979 to 2025. In Fahrenheit: 0.7 F (0.4 to 0.9) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Blue Marsh Lake
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.4 C (0.2 to 0.5) per decade0.7 F (0.4 to 0.9) per decade1979 to 202537Rise
Mean daily maximum0.4 C (0.2 to 0.6) per decade0.7 F (0.4 to 1.0) per decade1979 to 202537Rise
Mean daily minimum0.3 C (0.2 to 0.5) per decade0.6 F (0.3 to 0.9) per decade1979 to 202537Rise

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

1978 to 2026
Yearly extremes at Blue Marsh Lake: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)201135.6 C (96.1 F)49
Coldest night (TNn)-33.9 C (-29.0 F)1994-17.2 C (1.0 F)49
Wettest day (Rx1day)153.2 mm (6.0 in)201069.9 mm (2.8 in)49
Wettest five days (Rx5day)204.6 mm (8.1 in)201091.0 mm (3.6 in)49
Longest dry spell (CDD)34 days202415 days49

Hottest day (TXx)

Hottest day (TXx) at Blue Marsh Lake by year The hottest day of the year at Blue Marsh Lake, 1978 to 2026. The record is 39.4 C (102.9 F) in 2011, marked on the chart; the median year is 35.6 C (96.1 F). 323436384019801990200020102020Record: 39.4 C (102.9 F) in 2011
The hottest day of the year at Blue Marsh Lake, 1978 to 2026. The record is 39.4 C (102.9 F) in 2011, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Blue Marsh Lake by year
YearHottest day (TXx)
197834.4 C (93.9 F)
197933.9 C (93.0 F)
198036.7 C (98.1 F)
198133.9 C (93.0 F)
198236.1 C (97.0 F)
198335.0 C (95.0 F)
198433.9 C (93.0 F)
198533.3 C (91.9 F)
198637.8 C (100.0 F)
198736.7 C (98.1 F)
198838.9 C (102.0 F)
198932.2 C (90.0 F)
199035.0 C (95.0 F)
199136.1 C (97.0 F)
199232.8 C (91.0 F)
199335.6 C (96.1 F)
199436.1 C (97.0 F)
199537.2 C (99.0 F)
199633.9 C (93.0 F)
199735.6 C (96.1 F)
199838.3 C (100.9 F)
199938.9 C (102.0 F)
200032.8 C (91.0 F)
200136.1 C (97.0 F)
200236.7 C (98.1 F)
200332.8 C (91.0 F)
200433.3 C (91.9 F)
200535.0 C (95.0 F)
200636.1 C (97.0 F)
200734.4 C (93.9 F)
200833.9 C (93.0 F)
200933.9 C (93.0 F)
201037.8 C (100.0 F)
201139.4 C (102.9 F)
201237.8 C (100.0 F)
201335.0 C (95.0 F)
201432.8 C (91.0 F)
201533.9 C (93.0 F)
201636.1 C (97.0 F)
201734.4 C (93.9 F)
201835.6 C (96.1 F)
201935.6 C (96.1 F)
202035.6 C (96.1 F)
202136.1 C (97.0 F)
202235.0 C (95.0 F)
202335.6 C (96.1 F)
202436.7 C (98.1 F)
202536.7 C (98.1 F)
202638.9 C (102.0 F)

Coldest night (TNn)

Coldest night (TNn) at Blue Marsh Lake by year The coldest night of the year at Blue Marsh Lake, 1978 to 2026. The record is -33.9 C (-29.0 F) in 1994, marked on the chart; the median year is -17.2 C (1.0 F). -40-30-20-1019801990200020102020Record: -33.9 C (-29.0 F) in 1994
The coldest night of the year at Blue Marsh Lake, 1978 to 2026. The record is -33.9 C (-29.0 F) in 1994, marked on the chart; the median year is -17.2 C (1.0 F).
Coldest night (TNn) at Blue Marsh Lake by year
YearColdest night (TNn)
1978-11.1 C (12.0 F)
1979-23.9 C (-11.0 F)
1980-18.9 C (-2.0 F)
1981-24.4 C (-11.9 F)
1982-25.0 C (-13.0 F)
1983-20.0 C (-4.0 F)
1984-27.2 C (-17.0 F)
1985-23.3 C (-9.9 F)
1986-17.2 C (1.0 F)
1987-22.8 C (-9.0 F)
1988-26.1 C (-15.0 F)
1989-17.2 C (1.0 F)
1990-15.6 C (3.9 F)
1991-15.6 C (3.9 F)
1992-17.2 C (1.0 F)
1993-17.2 C (1.0 F)
1994-33.9 C (-29.0 F)
1995-17.2 C (1.0 F)
1996-24.4 C (-11.9 F)
1997-18.9 C (-2.0 F)
1998-12.2 C (10.0 F)
1999-15.6 C (3.9 F)
2000-16.7 C (1.9 F)
2001-17.8 C (0.0 F)
2002-15.6 C (3.9 F)
2003-18.9 C (-2.0 F)
2004-16.7 C (1.9 F)
2005-16.7 C (1.9 F)
2006-10.6 C (12.9 F)
2007-17.8 C (0.0 F)
2008-13.9 C (7.0 F)
2009-17.2 C (1.0 F)
2010-12.2 C (10.0 F)
2011-21.1 C (-6.0 F)
2012-12.8 C (9.0 F)
2013-13.9 C (7.0 F)
2014-21.1 C (-6.0 F)
2015-22.8 C (-9.0 F)
2016-16.1 C (3.0 F)
2017-15.0 C (5.0 F)
2018-20.6 C (-5.1 F)
2019-24.4 C (-11.9 F)
2020-11.1 C (12.0 F)
2021-13.9 C (7.0 F)
2022-16.1 C (3.0 F)
2023-12.8 C (9.0 F)
2024-16.1 C (3.0 F)
2025-25.0 C (-13.0 F)
2026-21.7 C (-7.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Blue Marsh Lake by year The wettest day of the year at Blue Marsh Lake, 1978 to 2026. The record is 153.2 mm (6.0 in) in 2010, marked on the chart; the median year is 69.9 mm (2.8 in). 05010015020019801990200020102020Record: 153.2 mm (6.0 in) in 2010
The wettest day of the year at Blue Marsh Lake, 1978 to 2026. The record is 153.2 mm (6.0 in) in 2010, marked on the chart; the median year is 69.9 mm (2.8 in).
Wettest day (Rx1day) at Blue Marsh Lake by year
YearWettest day (Rx1day)
197856.1 mm (2.2 in)
197989.7 mm (3.5 in)
198041.1 mm (1.6 in)
198136.6 mm (1.4 in)
198267.6 mm (2.7 in)
198390.4 mm (3.6 in)
198457.7 mm (2.3 in)
1985101.6 mm (4.0 in)
198643.9 mm (1.7 in)
1987124.0 mm (4.9 in)
198872.9 mm (2.9 in)
1989105.2 mm (4.1 in)
199052.1 mm (2.1 in)
199159.9 mm (2.4 in)
199253.8 mm (2.1 in)
199355.4 mm (2.2 in)
1994104.1 mm (4.1 in)
199566.0 mm (2.6 in)
199664.8 mm (2.6 in)
199748.5 mm (1.9 in)
199856.4 mm (2.2 in)
1999119.1 mm (4.7 in)
200084.1 mm (3.3 in)
200199.8 mm (3.9 in)
200255.9 mm (2.2 in)
200392.2 mm (3.6 in)
200490.7 mm (3.6 in)
200557.9 mm (2.3 in)
200680.8 mm (3.2 in)
200775.9 mm (3.0 in)
200866.8 mm (2.6 in)
200945.7 mm (1.8 in)
2010153.2 mm (6.0 in)
201165.5 mm (2.6 in)
201274.4 mm (2.9 in)
2013102.1 mm (4.0 in)
201477.5 mm (3.1 in)
201569.9 mm (2.8 in)
201677.0 mm (3.0 in)
201753.8 mm (2.1 in)
2018115.3 mm (4.5 in)
2019100.6 mm (4.0 in)
202079.8 mm (3.1 in)
2021110.5 mm (4.4 in)
202255.9 mm (2.2 in)
202383.6 mm (3.3 in)
202450.3 mm (2.0 in)
202569.9 mm (2.8 in)
202636.3 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Blue Marsh Lake by year The wettest five days of the year at Blue Marsh Lake, 1978 to 2026. The record is 204.6 mm (8.1 in) in 2010, marked on the chart; the median year is 91.0 mm (3.6 in). 05010015020025019801990200020102020Record: 204.6 mm (8.1 in) in 2010
The wettest five days of the year at Blue Marsh Lake, 1978 to 2026. The record is 204.6 mm (8.1 in) in 2010, marked on the chart; the median year is 91.0 mm (3.6 in).
Wettest five days (Rx5day) at Blue Marsh Lake by year
YearWettest five days (Rx5day)
197891.1 mm (3.6 in)
197998.9 mm (3.9 in)
198051.5 mm (2.0 in)
198173.9 mm (2.9 in)
1982103.4 mm (4.1 in)
1983141.2 mm (5.6 in)
198487.1 mm (3.4 in)
1985129.5 mm (5.1 in)
198663.0 mm (2.5 in)
198741.4 mm (1.6 in)
1988139.2 mm (5.5 in)
1989150.9 mm (5.9 in)
199087.6 mm (3.4 in)
199167.3 mm (2.6 in)
199264.4 mm (2.5 in)
1993102.8 mm (4.0 in)
1994151.3 mm (6.0 in)
199566.8 mm (2.6 in)
199693.2 mm (3.7 in)
199776.5 mm (3.0 in)
199887.9 mm (3.5 in)
1999160.0 mm (6.3 in)
200091.0 mm (3.6 in)
2001100.1 mm (3.9 in)
2002100.1 mm (3.9 in)
200396.0 mm (3.8 in)
2004118.6 mm (4.7 in)
200567.1 mm (2.6 in)
2006186.0 mm (7.3 in)
200794.7 mm (3.7 in)
200881.8 mm (3.2 in)
200970.1 mm (2.8 in)
2010204.6 mm (8.1 in)
2011167.1 mm (6.6 in)
2012112.5 mm (4.4 in)
201383.8 mm (3.3 in)
201441.2 mm (1.6 in)
201546.5 mm (1.8 in)
201677.8 mm (3.1 in)
201715.3 mm (0.6 in)
2018161.3 mm (6.4 in)
2019132.6 mm (5.2 in)
2020125.8 mm (5.0 in)
2021121.4 mm (4.8 in)
202264.6 mm (2.5 in)
202387.2 mm (3.4 in)
202451.4 mm (2.0 in)
202575.5 mm (3.0 in)
202681.5 mm (3.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Blue Marsh Lake by year The longest dry spell of the year at Blue Marsh Lake, 1978 to 2026. The record is 34 days in 2024, marked on the chart; the median year is 15 days. 01020304019801990200020102020Record: 34 days in 2024
The longest dry spell of the year at Blue Marsh Lake, 1978 to 2026. The record is 34 days in 2024, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Blue Marsh Lake by year
YearLongest dry spell (CDD)
197819 days
197913 days
198027 days
198115 days
198214 days
198321 days
198412 days
198512 days
198620 days
198724 days
198823 days
198912 days
199012 days
199123 days
199217 days
199310 days
199412 days
199520 days
199611 days
199719 days
199815 days
199920 days
200024 days
200120 days
200215 days
200313 days
200415 days
200516 days
200620 days
200722 days
200825 days
200914 days
201019 days
201114 days
201216 days
201311 days
20146 days
20156 days
20167 days
20175 days
20188 days
20198 days
20208 days
202110 days
202212 days
202316 days
202434 days
202515 days
202611 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.

Frost Dates and Growing Season

37 years with a frost

Across 37 years with a frost, the median last spring frost at Blue Marsh Lake falls on 25 April and the median first autumn frost on 19 October, which leaves a median of 172 days between them.

Fitted over all years, the growing season changes by +1.8 days per decade at this station.

Frost dates and growing season at Blue Marsh Lake
MeasureMedian, all yearsEarliest periodRecent period (1992 to 2025)Recent against earliestFitted trend
Last spring frost25 Apriln/a27 Apriln/a+0.9 days per decade
First autumn frost19 Octobern/a19 Octobern/a+2.7 days per decade
Growing days172 daysn/a168 daysn/a+1.8 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

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