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N Adams Harriman AP Weather Records (USW00054768)

Record envelope, standing records and threshold days for N Adams Harriman AP (USW00054768), Massachusetts, United States, with 40 years of record.

Key Facts for N Adams Harriman AP

  • N Adams Harriman AP (USW00054768) is a weather station in Massachusetts, United States at 42.70 latitude and -73.17 longitude, 197 m (646 ft) above sea level.
  • The station reports from 1987 to 2026, 40 years of record.
  • 1,464 records set at N Adams Harriman AP still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • N Adams Harriman AP tied a daily record high maximum temperature of 26.7 C (80.1 F) on 2 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Massachusetts, United States, 42.70 latitude, -73.17 longitude.
  • Elevation: 197 m (646 ft).
  • Period of record: 1987 to 2026, 40 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

12 days at or beyond a record
Daily record high and record low at N Adams Harriman AP, with 2026 drawn through them The band shows the record high and record low for each calendar day at N Adams Harriman AP. The lines show the 2026 daily maximum and minimum. 12 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 N Adams Harriman AP. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at N Adams Harriman AP, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan20.0 C (68.0 F)-28.8 C (-19.8 F)10.6 C (51.1 F)-24.4 C (-11.9 F)
Feb24.4 C (75.9 F)-28.8 C (-19.8 F)4.4 C (39.9 F)-22.8 C (-9.0 F)
Mar30.6 C (87.1 F)-25.6 C (-14.1 F)22.8 C (73.0 F)-8.3 C (17.1 F)
Apr32.2 C (90.0 F)-17.7 C (0.1 F)28.9 C (84.0 F)-7.2 C (19.0 F)
May35.0 C (95.0 F)-4.9 C (23.2 F)32.2 C (90.0 F)-0.6 C (30.9 F)
Jun33.9 C (93.0 F)0.6 C (33.1 F)31.7 C (89.1 F)2.2 C (36.0 F)
Jul35.6 C (96.1 F)6.1 C (43.0 F)33.9 C (93.0 F)7.8 C (46.0 F)
Aug34.4 C (93.9 F)3.3 C (37.9 F)31.7 C (89.1 F)8.9 C (48.0 F)
Sep33.3 C (91.9 F)-2.2 C (28.0 F)26.7 C (80.1 F)1.7 C (35.1 F)
Oct31.1 C (88.0 F)-7.8 C (18.0 F)26.7 C (80.1 F)-1.7 C (28.9 F)
Nov25.0 C (77.0 F)-17.1 C (1.2 F)n/an/a
Dec21.1 C (70.0 F)-24.4 C (-11.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at N Adams Harriman AP by the year they were set 1,464 records at N Adams Harriman AP still stand. 2002 holds the most, with 71. 0204060801987: 121988: 621989: 161996: 181997: 451998: 381999: 472000: 582001: 482002: 712003: 402004: 522005: 542006: 462007: 502008: 372009: 352010: 442011: 362012: 422013: 422014: 432015: 632016: 402017: 532018: 612019: 352020: 412021: 502022: 532023: 392024: 472025: 282026: 18198719972001200520092013201720212025
1,464 records at N Adams Harriman AP still stand. 2002 holds the most, with 71.
Standing records at N Adams Harriman AP by the year they were set
Year setStanding records
198712
198862
198916
199618
199745
199838
199947
200058
200148
200271
200340
200452
200554
200646
200750
200837
200935
201044
201136
201242
201342
201443
201563
201640
201753
201861
201935
202041
202150
202253
202339
202447
202528
202618

Wettest Day of Each Month

Oct: 150.9 mm (5.9 in)
Record daily precipitation for each month at N Adams Harriman AP The wettest day on record for each calendar month at N Adams Harriman AP. The most was 150.9 mm (5.9 in) on 8 October 2005. 050100150200 Jan: 42.7 mm (1.7 in), 24 January 2019 Jan Feb: 40.6 mm (1.6 in), 13 February 2008 Feb Mar: 47.5 mm (1.9 in), 23 March 2024 Mar Apr: 42.7 mm (1.7 in), 23 April 2023 Apr May: 66.3 mm (2.6 in), 19 May 1999 May Jun: 72.4 mm (2.9 in), 25 June 2014 Jun Jul: 67.1 mm (2.6 in), 9 July 2008 Jul Aug: 123.2 mm (4.9 in), 28 August 2011 Aug Sep: 102.1 mm (4.0 in), 16 September 1999 Sep Oct: 150.9 mm (5.9 in), 8 October 2005 Oct Nov: 55.6 mm (2.2 in), 2 November 1988 Nov Dec: 64.8 mm (2.6 in), 17 December 2000 Dec
The wettest day on record for each calendar month at N Adams Harriman AP. The most was 150.9 mm (5.9 in) on 8 October 2005.
Record daily precipitation for each month at N Adams Harriman AP
MonthRecord daily precipitation (mm)Date
Jan42.7 mm (1.7 in)24 January 2019
Feb40.6 mm (1.6 in)13 February 2008
Mar47.5 mm (1.9 in)23 March 2024
Apr42.7 mm (1.7 in)23 April 2023
May66.3 mm (2.6 in)19 May 1999
Jun72.4 mm (2.9 in)25 June 2014
Jul67.1 mm (2.6 in)9 July 2008
Aug123.2 mm (4.9 in)28 August 2011
Sep102.1 mm (4.0 in)16 September 1999
Oct150.9 mm (5.9 in)8 October 2005
Nov55.6 mm (2.2 in)2 November 1988
Dec64.8 mm (2.6 in)17 December 2000

Period of Record Coverage

1987 to 2026
Days with data per year at N Adams Harriman AP 34 years of record at N Adams Harriman AP, 1987 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1987, 1988, 1989, 1996, 2025, 2026. 1987: 92 of 365 days1988: 303 of 366 days1989: 89 of 365 days1996: 183 of 366 days1997: 363 of 365 days1998: 361 of 365 days1999: 364 of 365 days2000: 366 of 366 days2001: 362 of 365 days2002: 360 of 365 days2003: 360 of 365 days2004: 363 of 366 days2005: 365 of 365 days2006: 364 of 365 days2007: 361 of 365 days2008: 363 of 366 days2009: 364 of 365 days2010: 364 of 365 days2011: 363 of 365 days2012: 363 of 366 days2013: 363 of 365 days2014: 364 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 363 of 365 days2018: 362 of 365 days2019: 363 of 365 days2020: 363 of 366 days2021: 352 of 365 days2022: 352 of 365 days2023: 350 of 365 days2024: 351 of 366 days2025: 297 of 365 days2026: 270 of 365 days200020052010201520202025
34 years of record at N Adams Harriman AP, 1987 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1987, 1988, 1989, 1996, 2025, 2026.
Days with data per year at N Adams Harriman AP
YearDays with dataShare of yearComplete
19879225%No
198830383%No
19898924%No
199618350%No
199736399%Yes
199836199%Yes
1999364100%Yes
2000366100%Yes
200136299%Yes
200236099%Yes
200336099%Yes
200436399%Yes
2005365100%Yes
2006364100%Yes
200736199%Yes
200836399%Yes
2009364100%Yes
2010364100%Yes
201136399%Yes
201236399%Yes
201336399%Yes
2014364100%Yes
2015365100%Yes
2016366100%Yes
201736399%Yes
201836299%Yes
201936399%Yes
202036399%Yes
202135296%Yes
202235296%Yes
202335096%Yes
202435196%Yes
202529781%No
202627074%No

Latest Records

20
Latest records at N Adams Harriman AP
DateStationRecordValueBeat old record byOld record stoodSignificance
2 October 2026N Adams Harriman AP, USdaily high max (Tie, Provisional)26.7 C (80.1 F)tie24 years2 of 100 (Routine)
20 September 2026N Adams Harriman AP, USdaily low max (Provisional)13.9 C (57.0 F)2.8 C (5.0 F)5 years11 of 100 (Routine)
7 August 2026N Adams Harriman AP, USdaily high min (Tie)20.0 C (68.0 F)tie15 years2 of 100 (Routine)
2 August 2026N Adams Harriman AP, USdaily high min (Tie)20.6 C (69.1 F)tie20 years2 of 100 (Routine)
29 July 2026N Adams Harriman AP, USdaily low max20.6 C (69.1 F)1.1 C (2.0 F)12 years10 of 100 (Routine)
24 July 2026N Adams Harriman AP, USdaily low min7.8 C (46.0 F)1.6 C (2.9 F)11 years11 of 100 (Routine)
20 July 2026N Adams Harriman AP, USdaily low min (Tie)7.8 C (46.0 F)tie28 years3 of 100 (Routine)
7 July 2026N Adams Harriman AP, USdaily low max20.6 C (69.1 F)0.5 C (0.9 F)25 years12 of 100 (Routine)
4 July 2026N Adams Harriman AP, USdaily high min20.6 C (69.1 F)0.6 C (1.1 F)27 years13 of 100 (Routine)
22 June 2026N Adams Harriman AP, USdaily low max (Tie)18.3 C (64.9 F)tie19 years2 of 100 (Routine)
12 June 2026N Adams Harriman AP, USdaily high min20.6 C (69.1 F)0.6 C (1.1 F)20 years11 of 100 (Routine)
31 May 2026N Adams Harriman AP, USdaily low min1.7 C (35.1 F)1.6 C (2.9 F)24 years14 of 100 (Routine)
30 May 2026N Adams Harriman AP, USdaily low min2.8 C (37.0 F)0.5 C (0.9 F)21 years11 of 100 (Routine)
20 May 2026N Adams Harriman AP, USdaily high min (Tie)13.3 C (55.9 F)tie8 years1 of 100 (Routine)
19 May 2026N Adams Harriman AP, USdaily high min16.7 C (62.1 F)3.4 C (6.1 F)27 years19 of 100 (Routine)
19 May 2026N Adams Harriman AP, USdaily high max32.2 C (90.0 F)3.3 C (5.9 F)7 years11 of 100 (Routine)
5 May 2026N Adams Harriman AP, USdaily high max26.7 C (80.1 F)1.7 C (3.1 F)25 years14 of 100 (Routine)
21 April 2026N Adams Harriman AP, USdaily low min-6.1 C (21.0 F)1.8 C (3.2 F)8 years10 of 100 (Routine)
20 April 2026N Adams Harriman AP, USdaily low max6.7 C (44.1 F)1.1 C (2.0 F)8 years7 of 100 (Routine)
31 March 2026N Adams Harriman AP, USmonthly high min11.7 C (53.1 F)1.1 C (2.0 F)9 years17 of 100 (Routine)

Climate Trend

27 complete years, 1997 to 2024
Annual mean temperature at N Adams Harriman AP as warming stripes, 1997 to 2024 One stripe for each of 27 complete years at N Adams Harriman AP, 1997 to 2024. Blue stripes are years cooler than the station's own mean of 8.7 C (47.7 F); red stripes are warmer. The coolest year was 1997, at 7.6 C (45.8 F), and the warmest was 2024, at 10.3 C (50.6 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1997: 7.6 C, -1.1 C from the station mean1998: 9.5 C, +0.7 C from the station mean1999: 8.9 C, +0.2 C from the station mean2000: 7.7 C, -1.0 C from the station mean2001: 8.5 C, -0.2 C from the station mean2002: 8.8 C, 0.0 C from the station mean2003: 7.7 C, -1.1 C from the station mean2004: 7.9 C, -0.8 C from the station mean2005: 8.4 C, -0.3 C from the station mean2006: 9.4 C, +0.6 C from the station mean2007: 8.3 C, -0.4 C from the station mean2008: 8.5 C, -0.3 C from the station mean2009: 8.1 C, -0.6 C from the station mean2010: 9.2 C, +0.5 C from the station mean2011: 9.0 C, +0.2 C from the station mean2012: 9.9 C, +1.1 C from the station mean2013: 8.3 C, -0.5 C from the station mean2014: 7.8 C, -1.0 C from the station mean2015: 8.1 C, -0.6 C from the station mean2016: 9.1 C, +0.4 C from the station mean2017: 8.8 C, +0.1 C from the station mean2018: 8.7 C, -0.1 C from the station mean2019: 8.1 C, -0.6 C from the station mean2020: 9.6 C, +0.9 C from the station mean2021: 10.0 C, +1.3 C from the station mean2022: 9.9 C, +1.1 C from the station mean2024: 10.3 C, +1.6 C from the station mean199720002005201020152020
One stripe for each of 27 complete years at N Adams Harriman AP, 1997 to 2024. Blue stripes are years cooler than the station's own mean of 8.7 C (47.7 F); red stripes are warmer. The coolest year was 1997, at 7.6 C (45.8 F), and the warmest was 2024, at 10.3 C (50.6 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at N Adams Harriman AP as warming stripes, 1997 to 2024
YearAnnual mean temperatureDifference from the station mean
19977.6 C-1.10 C
19989.5 C+0.74 C
19998.9 C+0.16 C
20007.7 C-1.00 C
20018.5 C-0.20 C
20028.8 C+0.04 C
20037.7 C-1.09 C
20047.9 C-0.83 C
20058.4 C-0.34 C
20069.4 C+0.64 C
20078.3 C-0.42 C
20088.5 C-0.29 C
20098.1 C-0.60 C
20109.2 C+0.47 C
20119.0 C+0.22 C
20129.9 C+1.13 C
20138.3 C-0.49 C
20147.8 C-0.99 C
20158.1 C-0.64 C
20169.1 C+0.39 C
20178.8 C+0.10 C
20188.7 C-0.06 C
20198.1 C-0.63 C
20209.6 C+0.90 C
202110.0 C+1.29 C
20229.9 C+1.15 C
202410.3 C+1.57 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

1987 to 2026
Yearly extremes at N Adams Harriman AP: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.6 C (96.1 F)198833.9 C (93.0 F)34
Coldest night (TNn)-28.8 C (-19.8 F)2011-22.9 C (-9.3 F)34
Wettest day (Rx1day)150.9 mm (5.9 in)200558.8 mm (2.3 in)32
Wettest five days (Rx5day)169.8 mm (6.7 in)200586.5 mm (3.4 in)32
Longest dry spell (CDD)34 days201516 days32

Hottest day (TXx)

Hottest day (TXx) at N Adams Harriman AP by year The hottest day of the year at N Adams Harriman AP, 1987 to 2026. The record is 35.6 C (96.1 F) in 1988, marked on the chart; the median year is 33.9 C (93.0 F). 20253035401990200020102020Record: 35.6 C (96.1 F) in 1988
The hottest day of the year at N Adams Harriman AP, 1987 to 2026. The record is 35.6 C (96.1 F) in 1988, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at N Adams Harriman AP by year
YearHottest day (TXx)
198722.2 C (72.0 F)
198835.6 C (96.1 F)
198921.1 C (70.0 F)
199631.1 C (88.0 F)
199732.8 C (91.0 F)
199831.1 C (88.0 F)
199932.8 C (91.0 F)
200031.1 C (88.0 F)
200134.4 C (93.9 F)
200234.4 C (93.9 F)
200332.8 C (91.0 F)
200431.1 C (88.0 F)
200533.3 C (91.9 F)
200634.4 C (93.9 F)
200733.9 C (93.0 F)
200833.9 C (93.0 F)
200932.2 C (90.0 F)
201034.4 C (93.9 F)
201134.4 C (93.9 F)
201234.4 C (93.9 F)
201333.9 C (93.0 F)
201432.2 C (90.0 F)
201532.2 C (90.0 F)
201632.8 C (91.0 F)
201732.8 C (91.0 F)
201834.4 C (93.9 F)
201932.2 C (90.0 F)
202035.0 C (95.0 F)
202133.9 C (93.0 F)
202235.0 C (95.0 F)
202333.9 C (93.0 F)
202433.9 C (93.0 F)
202533.9 C (93.0 F)
202633.9 C (93.0 F)

Coldest night (TNn)

Coldest night (TNn) at N Adams Harriman AP by year The coldest night of the year at N Adams Harriman AP, 1987 to 2026. The record is -28.8 C (-19.8 F) in 2011, marked on the chart; the median year is -22.9 C (-9.3 F). -30-25-20-151990200020102020Record: -28.8 C (-19.8 F) in 2011
The coldest night of the year at N Adams Harriman AP, 1987 to 2026. The record is -28.8 C (-19.8 F) in 2011, marked on the chart; the median year is -22.9 C (-9.3 F).
Coldest night (TNn) at N Adams Harriman AP by year
YearColdest night (TNn)
1987-19.4 C (-2.9 F)
1988-21.1 C (-6.0 F)
1989-20.0 C (-4.0 F)
1996-18.3 C (-0.9 F)
1997-22.2 C (-8.0 F)
1998-24.4 C (-11.9 F)
1999-23.3 C (-9.9 F)
2000-23.3 C (-9.9 F)
2001-17.8 C (0.0 F)
2002-16.7 C (1.9 F)
2003-25.6 C (-14.1 F)
2004-24.4 C (-11.9 F)
2005-26.1 C (-15.0 F)
2006-19.9 C (-3.8 F)
2007-21.6 C (-6.9 F)
2008-23.2 C (-9.8 F)
2009-24.3 C (-11.7 F)
2010-19.9 C (-3.8 F)
2011-28.8 C (-19.8 F)
2012-21.6 C (-6.9 F)
2013-22.7 C (-8.9 F)
2014-26.0 C (-14.8 F)
2015-28.8 C (-19.8 F)
2016-27.1 C (-16.8 F)
2017-20.5 C (-4.9 F)
2018-26.6 C (-15.9 F)
2019-22.7 C (-8.9 F)
2020-22.7 C (-8.9 F)
2021-23.2 C (-9.8 F)
2022-22.7 C (-8.9 F)
2023-26.0 C (-14.8 F)
2024-22.7 C (-8.9 F)
2025-28.2 C (-18.8 F)
2026-24.4 C (-11.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at N Adams Harriman AP by year The wettest day of the year at N Adams Harriman AP, 1987 to 2026. The record is 150.9 mm (5.9 in) in 2005, marked on the chart; the median year is 58.8 mm (2.3 in). 0501001502001990200020102020Record: 150.9 mm (5.9 in) in 2005
The wettest day of the year at N Adams Harriman AP, 1987 to 2026. The record is 150.9 mm (5.9 in) in 2005, marked on the chart; the median year is 58.8 mm (2.3 in).
Wettest day (Rx1day) at N Adams Harriman AP by year
YearWettest day (Rx1day)
1987113.0 mm (4.4 in)
198855.6 mm (2.2 in)
198926.2 mm (1.0 in)
1996n/a
1997n/a
199845.2 mm (1.8 in)
1999102.1 mm (4.0 in)
200066.0 mm (2.6 in)
200137.8 mm (1.5 in)
200244.2 mm (1.7 in)
200359.2 mm (2.3 in)
200453.8 mm (2.1 in)
2005150.9 mm (5.9 in)
200662.0 mm (2.4 in)
200778.7 mm (3.1 in)
200882.3 mm (3.2 in)
200971.9 mm (2.8 in)
201069.1 mm (2.7 in)
2011123.2 mm (4.9 in)
201249.5 mm (1.9 in)
201362.2 mm (2.4 in)
201472.4 mm (2.9 in)
201574.7 mm (2.9 in)
201637.1 mm (1.5 in)
201748.3 mm (1.9 in)
201865.5 mm (2.6 in)
201962.0 mm (2.4 in)
202046.2 mm (1.8 in)
202150.8 mm (2.0 in)
202243.9 mm (1.7 in)
202358.4 mm (2.3 in)
202447.5 mm (1.9 in)
202537.8 mm (1.5 in)
202652.1 mm (2.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at N Adams Harriman AP by year The wettest five days of the year at N Adams Harriman AP, 1987 to 2026. The record is 169.8 mm (6.7 in) in 2005, marked on the chart; the median year is 86.5 mm (3.4 in). 501001502001990200020102020Record: 169.8 mm (6.7 in) in 2005
The wettest five days of the year at N Adams Harriman AP, 1987 to 2026. The record is 169.8 mm (6.7 in) in 2005, marked on the chart; the median year is 86.5 mm (3.4 in).
Wettest five days (Rx5day) at N Adams Harriman AP by year
YearWettest five days (Rx5day)
1987126.5 mm (5.0 in)
198887.9 mm (3.5 in)
198952.9 mm (2.1 in)
1996n/a
1997n/a
1998103.5 mm (4.1 in)
1999115.9 mm (4.6 in)
200096.5 mm (3.8 in)
200160.2 mm (2.4 in)
200265.7 mm (2.6 in)
200398.0 mm (3.9 in)
200495.3 mm (3.8 in)
2005169.8 mm (6.7 in)
200681.9 mm (3.2 in)
2007106.8 mm (4.2 in)
2008112.7 mm (4.4 in)
200997.8 mm (3.9 in)
2010116.9 mm (4.6 in)
2011144.1 mm (5.7 in)
201273.4 mm (2.9 in)
2013115.3 mm (4.5 in)
201472.4 mm (2.9 in)
201581.8 mm (3.2 in)
201674.5 mm (2.9 in)
201761.5 mm (2.4 in)
201876.2 mm (3.0 in)
201972.2 mm (2.8 in)
202085.1 mm (3.4 in)
2021109.5 mm (4.3 in)
202266.3 mm (2.6 in)
202376.7 mm (3.0 in)
202467.4 mm (2.7 in)
202566.6 mm (2.6 in)
202691.0 mm (3.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at N Adams Harriman AP by year The longest dry spell of the year at N Adams Harriman AP, 1987 to 2026. The record is 34 days in 2015, marked on the chart; the median year is 16 days. 0102030401990200020102020Record: 34 days in 2015
The longest dry spell of the year at N Adams Harriman AP, 1987 to 2026. The record is 34 days in 2015, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at N Adams Harriman AP by year
YearLongest dry spell (CDD)
19878 days
198812 days
198912 days
1996n/a
1997n/a
199813 days
199926 days
200011 days
200114 days
200213 days
200316 days
200415 days
200514 days
200617 days
200713 days
200815 days
200916 days
201018 days
201116 days
201218 days
201312 days
201418 days
201534 days
201617 days
201717 days
201815 days
201911 days
202017 days
202116 days
202216 days
202316 days
202421 days
202516 days
202610 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

27 years with a frost

Across 27 years with a frost, the median last spring frost at N Adams Harriman AP falls on 11 May and the median first autumn frost on 7 October, which leaves a median of 152 days between them.

Fitted over all years, the growing season changes by +9.2 days per decade at this station.

Frost dates and growing season at N Adams Harriman AP
MeasureMedian, all yearsEarliest periodRecent period (1997 to 2024)Recent against earliestFitted trend
Last spring frost11 Mayn/a11 Mayn/a-6.7 days per decade
First autumn frost7 Octobern/a7 Octobern/a+2.5 days per decade
Growing days152 daysn/a152 daysn/a+9.2 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 N Adams Harriman AP standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for N Adams Harriman AP 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-16).