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Wellsville Weather Records (USC00309072)

Record envelope, standing records and threshold days for Wellsville (USC00309072), New York, United States, with 71 years of record.

Key Facts for Wellsville

  • Wellsville (USC00309072) is a weather station in New York, United States at 42.12 latitude and -77.95 longitude, 460 m (1,510 ft) above sea level.
  • The station reports from 1956 to 2026, 71 years of record.
  • 1,464 records set at Wellsville still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Wellsville set a daily record precipitation of 53.6 mm (2.1 in) on 3 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: New York, United States, 42.12 latitude, -77.95 longitude.
  • Elevation: 460 m (1,510 ft).
  • Period of record: 1956 to 2026, 71 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

26 days at or beyond a record
Daily record high and record low at Wellsville, with 2026 drawn through them The band shows the record high and record low for each calendar day at Wellsville. The lines show the 2026 daily maximum and minimum. 26 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 Wellsville. The lines show the 2026 daily maximum and minimum. 26 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Wellsville, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan17.8 C (64.0 F)-28.3 C (-18.9 F)11.1 C (52.0 F)-23.9 C (-11.0 F)
Feb22.2 C (72.0 F)-31.1 C (-24.0 F)10.0 C (50.0 F)-28.3 C (-18.9 F)
Mar25.0 C (77.0 F)-30.0 C (-22.0 F)23.3 C (73.9 F)-13.9 C (7.0 F)
Apr30.6 C (87.1 F)-15.0 C (5.0 F)27.2 C (81.0 F)-10.0 C (14.0 F)
May35.6 C (96.1 F)-6.1 C (21.0 F)31.7 C (89.1 F)-2.8 C (27.0 F)
Jun33.3 C (91.9 F)-1.1 C (30.0 F)31.7 C (89.1 F)2.2 C (36.0 F)
Jul37.8 C (100.0 F)3.3 C (37.9 F)33.9 C (93.0 F)7.2 C (45.0 F)
Aug32.8 C (91.0 F)3.9 C (39.0 F)29.4 C (84.9 F)6.1 C (43.0 F)
Sep32.2 C (90.0 F)-2.2 C (28.0 F)30.6 C (87.1 F)2.2 C (36.0 F)
Oct29.4 C (84.9 F)-7.2 C (19.0 F)23.9 C (75.0 F)0.6 C (33.1 F)
Nov23.9 C (75.0 F)-19.4 C (-2.9 F)n/an/a
Dec19.4 C (66.9 F)-22.2 C (-8.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Wellsville by the year they were set 1,464 records at Wellsville still stand. 2015 holds the most, with 91. 02550751001980: 42004: 552005: 832006: 682007: 872008: 622009: 552010: 602011: 482012: 772013: 702014: 692015: 912016: 602017: 762018: 742019: 462020: 472021: 572022: 552023: 492024: 522025: 672026: 5219802006200920122015201820212024
1,464 records at Wellsville still stand. 2015 holds the most, with 91.
Standing records at Wellsville by the year they were set
Year setStanding records
19804
200455
200583
200668
200787
200862
200955
201060
201148
201277
201370
201469
201591
201660
201776
201874
201946
202047
202157
202255
202349
202452
202567
202652

All-Time Record Progression

1 new records
When Wellsville set new all-time records 1 all-time records were set at Wellsville between 13 March 1993 and 13 March 1993. Each dot is a new record. Record daily snowfall13 March 1993: Record daily snowfall 55.9 cm (22.0 in)
1 all-time records were set at Wellsville between 13 March 1993 and 13 March 1993. Each dot is a new record.
When Wellsville set new all-time records
DateKindDetail
1993-03-13Record daily snowfallRecord daily snowfall 55.9 cm (22.0 in)

Wettest Day of Each Month

Jun: 166.9 mm (6.6 in)
Record daily precipitation for each month at Wellsville The wettest day on record for each calendar month at Wellsville. The most was 166.9 mm (6.6 in) on 21 June 1972. 050100150200 Jan: 53.6 mm (2.1 in), 13 January 2018 Jan Feb: 58.4 mm (2.3 in), 26 February 1961 Feb Mar: 45.7 mm (1.8 in), 4 March 1999 Mar Apr: 50.0 mm (2.0 in), 30 April 2021 Apr May: 58.4 mm (2.3 in), 14 May 2011 May Jun: 166.9 mm (6.6 in), 21 June 1972 Jun Jul: 77.0 mm (3.0 in), 22 July 2003 Jul Aug: 110.5 mm (4.4 in), 13 August 1994 Aug Sep: 99.3 mm (3.9 in), 14 September 1977 Sep Oct: 86.9 mm (3.4 in), 20 October 1995 Oct Nov: 63.5 mm (2.5 in), 12 November 2022 Nov Dec: 46.0 mm (1.8 in), 1 December 2010 Dec
The wettest day on record for each calendar month at Wellsville. The most was 166.9 mm (6.6 in) on 21 June 1972.
Record daily precipitation for each month at Wellsville
MonthRecord daily precipitation (mm)Date
Jan53.6 mm (2.1 in)13 January 2018
Feb58.4 mm (2.3 in)26 February 1961
Mar45.7 mm (1.8 in)4 March 1999
Apr50.0 mm (2.0 in)30 April 2021
May58.4 mm (2.3 in)14 May 2011
Jun166.9 mm (6.6 in)21 June 1972
Jul77.0 mm (3.0 in)22 July 2003
Aug110.5 mm (4.4 in)13 August 1994
Sep99.3 mm (3.9 in)14 September 1977
Oct86.9 mm (3.4 in)20 October 1995
Nov63.5 mm (2.5 in)12 November 2022
Dec46.0 mm (1.8 in)1 December 2010

Period of Record Coverage

1980 to 2026
Days with data per year at Wellsville 24 years of record at Wellsville, 1980 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1980, 2026. 1980: 31 of 366 days2004: 334 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 364 of 365 days2008: 366 of 366 days2009: 364 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 365 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 280 of 365 days198020052010201520202025
24 years of record at Wellsville, 1980 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1980, 2026.
Days with data per year at Wellsville
YearDays with dataShare of yearComplete
1980318%No
200433491%Yes
2005365100%Yes
2006365100%Yes
2007364100%Yes
2008366100%Yes
2009364100%Yes
2010365100%Yes
2011365100%Yes
2012365100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017364100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628077%No

Latest Records

20
Latest records at Wellsville
DateStationRecordValueBeat old record byOld record stoodSignificance
3 September 2026Wellsville, USdaily rain (Provisional)53.6 mm (2.1 in)10.4 mm (0.4 in)20 years22 of 100 (Routine)
29 July 2026Wellsville, USdaily rain43.7 mm (1.7 in)4.3 mm (0.17 in)68 years31 of 100 (Routine)
6 July 2026Wellsville, USdaily rain11.9 mm (0.5 in)0.2 mm (0.01 in)19 years12 of 100 (Routine)
27 March 2026Wellsville, USdaily rain28.7 mm (1.1 in)11.4 mm (0.4 in)24 years31 of 100 (Routine)
23 February 2026Wellsville, USdaily snowfall (Tie)5.1 cm (2.0 in)tie39 years4 of 100 (Routine)
26 January 2026Wellsville, USdaily snowfall15.2 cm (6.0 in)8.8 cm (3.5 in)27 years35 of 100 (Notable)
30 November 2025Wellsville, USdaily snow depth17.8 cm (7.0 in)2.6 cm (1.0 in)67 years31 of 100 (Routine)
29 November 2025Wellsville, USdaily snow depth22.9 cm (9.0 in)5.1 cm (2.0 in)67 years34 of 100 (Routine)
10 November 2025Wellsville, USdaily snowfall5.1 cm (2.0 in)1.3 cm (0.5 in)48 years23 of 100 (Routine)
17 July 2025Wellsville, USdaily rain37.3 mm (1.5 in)8.6 mm (0.34 in)39 years26 of 100 (Routine)
7 June 2025Wellsville, USdaily rain36.6 mm (1.4 in)16.3 mm (0.6 in)12 years22 of 100 (Routine)
17 May 2025Wellsville, USdaily rain19.8 mm (0.8 in)4.3 mm (0.17 in)56 years20 of 100 (Routine)
6 May 2025Wellsville, USdaily rain29.5 mm (1.2 in)9.7 mm (0.38 in)15 years23 of 100 (Routine)
17 March 2025Wellsville, USdaily rain21.8 mm (0.9 in)4.8 mm (0.19 in)20 years20 of 100 (Routine)
17 February 2025Wellsville, USdaily snowfall (Tie)10.2 cm (4.0 in)tie28 years3 of 100 (Routine)
15 February 2025Wellsville, USdaily snowfall (Tie)10.2 cm (4.0 in)tie52 years5 of 100 (Routine)
1 February 2025Wellsville, USdaily rain12.7 mm (0.5 in)3.8 mm (0.15 in)39 years20 of 100 (Routine)
22 September 2024Wellsville, USdaily rain52.1 mm (2.1 in)24.9 mm (1.0 in)6 years29 of 100 (Routine)
7 September 2024Wellsville, USdaily rain27.9 mm (1.1 in)8.8 mm (0.35 in)66 years33 of 100 (Routine)
10 August 2024Wellsville, USdaily rain46.0 mm (1.8 in)14.0 mm (0.6 in)21 years25 of 100 (Routine)

Climate Trend

21 complete years, 2005 to 2025
Annual mean temperature at Wellsville as warming stripes, 2005 to 2025 One stripe for each of 21 complete years at Wellsville, 2005 to 2025. Blue stripes are years cooler than the station's own mean of 7.7 C (45.9 F); red stripes are warmer. The coolest year was 2014, at 6.2 C (43.1 F), and the warmest was 2024, at 9.1 C (48.4 F). The strongest colour marks a difference of 1.6 C (2.9 F). 2005: 7.0 C, -0.7 C from the station mean2006: 8.0 C, +0.3 C from the station mean2007: 7.1 C, -0.6 C from the station mean2008: 7.0 C, -0.7 C from the station mean2009: 6.8 C, -1.0 C from the station mean2010: 7.6 C, -0.2 C from the station mean2011: 8.0 C, +0.3 C from the station mean2012: 8.8 C, +1.1 C from the station mean2013: 7.2 C, -0.5 C from the station mean2014: 6.2 C, -1.5 C from the station mean2015: 7.0 C, -0.8 C from the station mean2016: 8.2 C, +0.5 C from the station mean2017: 8.0 C, +0.2 C from the station mean2018: 7.7 C, 0.0 C from the station mean2019: 7.4 C, -0.3 C from the station mean2020: 8.3 C, +0.6 C from the station mean2021: 8.6 C, +0.9 C from the station mean2022: 7.6 C, -0.1 C from the station mean2023: 8.8 C, +1.1 C from the station mean2024: 9.1 C, +1.4 C from the station mean2025: 7.9 C, +0.1 C from the station mean2005200820102012201420162018202020222024
One stripe for each of 21 complete years at Wellsville, 2005 to 2025. Blue stripes are years cooler than the station's own mean of 7.7 C (45.9 F); red stripes are warmer. The coolest year was 2014, at 6.2 C (43.1 F), and the warmest was 2024, at 9.1 C (48.4 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Wellsville as warming stripes, 2005 to 2025
YearAnnual mean temperatureDifference from the station mean
20057.0 C-0.72 C
20068.0 C+0.27 C
20077.1 C-0.59 C
20087.0 C-0.73 C
20096.8 C-0.96 C
20107.6 C-0.17 C
20118.0 C+0.26 C
20128.8 C+1.06 C
20137.2 C-0.53 C
20146.2 C-1.55 C
20157.0 C-0.77 C
20168.2 C+0.47 C
20178.0 C+0.24 C
20187.7 C-0.05 C
20197.4 C-0.35 C
20208.3 C+0.60 C
20218.6 C+0.92 C
20227.6 C-0.09 C
20238.8 C+1.12 C
20249.1 C+1.41 C
20257.9 C+0.13 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

1956 to 2026
Yearly extremes at Wellsville: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.8 C (100.0 F)201132.8 C (91.0 F)24
Coldest night (TNn)-31.1 C (-24.0 F)2015-24.4 C (-12.0 F)24
Wettest day (Rx1day)166.9 mm (6.6 in)197248.5 mm (1.9 in)71
Wettest five days (Rx5day)353.0 mm (13.9 in)197278.2 mm (3.1 in)71
Longest dry spell (CDD)27 days196315 days71

Hottest day (TXx)

Hottest day (TXx) at Wellsville by year The hottest day of the year at Wellsville, 1956 to 2026. The record is 37.8 C (100.0 F) in 2011, marked on the chart; the median year is 32.8 C (91.0 F). 30323436381960198020002020Record: 37.8 C (100.0 F) in 2011
The hottest day of the year at Wellsville, 1956 to 2026. The record is 37.8 C (100.0 F) in 2011, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Wellsville by year
YearHottest day (TXx)
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1979n/a
198035.6 C (96.1 F)
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
2003n/a
200432.2 C (90.0 F)
200533.3 C (91.9 F)
200632.2 C (90.0 F)
200733.3 C (91.9 F)
200833.3 C (91.9 F)
200930.6 C (87.1 F)
201033.3 C (91.9 F)
201137.8 C (100.0 F)
201234.4 C (93.9 F)
201332.8 C (91.0 F)
201430.6 C (87.1 F)
201532.2 C (90.0 F)
201632.8 C (91.0 F)
201730.6 C (87.1 F)
201833.9 C (93.0 F)
201932.2 C (90.0 F)
202032.2 C (90.0 F)
202132.2 C (90.0 F)
202232.8 C (91.0 F)
202331.1 C (88.0 F)
202432.2 C (90.0 F)
202533.3 C (91.9 F)
202633.9 C (93.0 F)

Coldest night (TNn)

Coldest night (TNn) at Wellsville by year The coldest night of the year at Wellsville, 1956 to 2026. The record is -31.1 C (-24.0 F) in 2015, marked on the chart; the median year is -24.4 C (-12.0 F). -40-30-20-1001960198020002020Record: -31.1 C (-24.0 F) in 2015
The coldest night of the year at Wellsville, 1956 to 2026. The record is -31.1 C (-24.0 F) in 2015, marked on the chart; the median year is -24.4 C (-12.0 F).
Coldest night (TNn) at Wellsville by year
YearColdest night (TNn)
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1979n/a
1980-2.2 C (28.0 F)
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
2003n/a
2004-26.7 C (-16.1 F)
2005-28.3 C (-18.9 F)
2006-16.7 C (1.9 F)
2007-22.2 C (-8.0 F)
2008-22.2 C (-8.0 F)
2009-27.8 C (-18.0 F)
2010-23.9 C (-11.0 F)
2011-28.3 C (-18.9 F)
2012-21.1 C (-6.0 F)
2013-22.2 C (-8.0 F)
2014-28.9 C (-20.0 F)
2015-31.1 C (-24.0 F)
2016-25.6 C (-14.1 F)
2017-21.1 C (-6.0 F)
2018-26.7 C (-16.1 F)
2019-25.0 C (-13.0 F)
2020-23.9 C (-11.0 F)
2021-20.0 C (-4.0 F)
2022-28.3 C (-18.9 F)
2023-23.3 C (-9.9 F)
2024-21.1 C (-6.0 F)
2025-25.6 C (-14.1 F)
2026-28.3 C (-18.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Wellsville by year The wettest day of the year at Wellsville, 1956 to 2026. The record is 166.9 mm (6.6 in) in 1972, marked on the chart; the median year is 48.5 mm (1.9 in). 0501001502001960198020002020Record: 166.9 mm (6.6 in) in 1972
The wettest day of the year at Wellsville, 1956 to 2026. The record is 166.9 mm (6.6 in) in 1972, marked on the chart; the median year is 48.5 mm (1.9 in).
Wettest day (Rx1day) at Wellsville by year
YearWettest day (Rx1day)
195655.4 mm (2.2 in)
195737.1 mm (1.5 in)
195839.4 mm (1.6 in)
195945.7 mm (1.8 in)
196046.2 mm (1.8 in)
196161.2 mm (2.4 in)
196239.9 mm (1.6 in)
196352.1 mm (2.1 in)
196446.5 mm (1.8 in)
196526.2 mm (1.0 in)
196684.1 mm (3.3 in)
196764.5 mm (2.5 in)
196840.4 mm (1.6 in)
196953.3 mm (2.1 in)
197031.2 mm (1.2 in)
197143.7 mm (1.7 in)
1972166.9 mm (6.6 in)
197341.4 mm (1.6 in)
197450.8 mm (2.0 in)
197556.6 mm (2.2 in)
197630.0 mm (1.2 in)
197799.3 mm (3.9 in)
197847.2 mm (1.9 in)
197942.9 mm (1.7 in)
198038.1 mm (1.5 in)
198156.4 mm (2.2 in)
198248.0 mm (1.9 in)
198330.5 mm (1.2 in)
198444.2 mm (1.7 in)
198527.4 mm (1.1 in)
198633.0 mm (1.3 in)
198761.0 mm (2.4 in)
198868.6 mm (2.7 in)
198973.7 mm (2.9 in)
199049.0 mm (1.9 in)
199137.1 mm (1.5 in)
199234.5 mm (1.4 in)
199359.9 mm (2.4 in)
1994110.5 mm (4.4 in)
199586.9 mm (3.4 in)
199649.5 mm (1.9 in)
199743.2 mm (1.7 in)
199846.0 mm (1.8 in)
199955.9 mm (2.2 in)
200066.3 mm (2.6 in)
200142.4 mm (1.7 in)
200244.5 mm (1.8 in)
200377.0 mm (3.0 in)
200457.7 mm (2.3 in)
200576.7 mm (3.0 in)
200643.2 mm (1.7 in)
200740.6 mm (1.6 in)
200840.1 mm (1.6 in)
200944.5 mm (1.8 in)
201066.0 mm (2.6 in)
201158.4 mm (2.3 in)
201253.3 mm (2.1 in)
201341.4 mm (1.6 in)
201439.4 mm (1.6 in)
201589.2 mm (3.5 in)
201661.0 mm (2.4 in)
201755.1 mm (2.2 in)
201853.6 mm (2.1 in)
201941.9 mm (1.6 in)
202048.5 mm (1.9 in)
202169.3 mm (2.7 in)
202263.5 mm (2.5 in)
202335.8 mm (1.4 in)
202452.1 mm (2.1 in)
202537.3 mm (1.5 in)
202653.6 mm (2.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Wellsville by year The wettest five days of the year at Wellsville, 1956 to 2026. The record is 353.0 mm (13.9 in) in 1972, marked on the chart; the median year is 78.2 mm (3.1 in). 01002003004001960198020002020Record: 353.0 mm (13.9 in) in 1972
The wettest five days of the year at Wellsville, 1956 to 2026. The record is 353.0 mm (13.9 in) in 1972, marked on the chart; the median year is 78.2 mm (3.1 in).
Wettest five days (Rx5day) at Wellsville by year
YearWettest five days (Rx5day)
195698.5 mm (3.9 in)
195761.0 mm (2.4 in)
195871.1 mm (2.8 in)
195963.3 mm (2.5 in)
1960112.6 mm (4.4 in)
196173.8 mm (2.9 in)
196265.8 mm (2.6 in)
196369.4 mm (2.7 in)
196458.4 mm (2.3 in)
196561.5 mm (2.4 in)
196686.1 mm (3.4 in)
196780.2 mm (3.2 in)
196858.4 mm (2.3 in)
196963.5 mm (2.5 in)
197064.1 mm (2.5 in)
197155.1 mm (2.2 in)
1972353.0 mm (13.9 in)
197354.4 mm (2.1 in)
197456.6 mm (2.2 in)
197578.2 mm (3.1 in)
197670.1 mm (2.8 in)
1977113.5 mm (4.5 in)
197873.3 mm (2.9 in)
197957.9 mm (2.3 in)
198043.7 mm (1.7 in)
198194.8 mm (3.7 in)
198266.6 mm (2.6 in)
198336.0 mm (1.4 in)
1984113.5 mm (4.5 in)
198560.5 mm (2.4 in)
198675.9 mm (3.0 in)
1987107.7 mm (4.2 in)
198889.7 mm (3.5 in)
1989102.2 mm (4.0 in)
199082.6 mm (3.3 in)
199164.8 mm (2.6 in)
199266.6 mm (2.6 in)
199395.5 mm (3.8 in)
1994141.5 mm (5.6 in)
199588.2 mm (3.5 in)
199689.2 mm (3.5 in)
199766.1 mm (2.6 in)
199893.8 mm (3.7 in)
199980.0 mm (3.1 in)
200084.9 mm (3.3 in)
200157.1 mm (2.2 in)
200276.8 mm (3.0 in)
2003138.7 mm (5.5 in)
2004113.1 mm (4.5 in)
2005125.2 mm (4.9 in)
200678.9 mm (3.1 in)
200779.1 mm (3.1 in)
200866.3 mm (2.6 in)
200970.5 mm (2.8 in)
201083.6 mm (3.3 in)
2011101.6 mm (4.0 in)
201271.1 mm (2.8 in)
201358.2 mm (2.3 in)
201480.3 mm (3.2 in)
2015104.9 mm (4.1 in)
2016123.5 mm (4.9 in)
201783.3 mm (3.3 in)
201893.2 mm (3.7 in)
201953.0 mm (2.1 in)
202075.4 mm (3.0 in)
202188.8 mm (3.5 in)
202282.4 mm (3.2 in)
202359.4 mm (2.3 in)
202472.4 mm (2.9 in)
202581.5 mm (3.2 in)
202687.0 mm (3.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Wellsville by year The longest dry spell of the year at Wellsville, 1956 to 2026. The record is 27 days in 1963, marked on the chart; the median year is 15 days. 510152025301960198020002020Record: 27 days in 1963
The longest dry spell of the year at Wellsville, 1956 to 2026. The record is 27 days in 1963, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Wellsville by year
YearLongest dry spell (CDD)
195614 days
195724 days
195811 days
195921 days
196013 days
196111 days
196223 days
196327 days
196423 days
19659 days
196617 days
196712 days
196817 days
196919 days
197016 days
197120 days
197211 days
197315 days
197410 days
197521 days
197613 days
197717 days
197814 days
197911 days
198016 days
198113 days
198215 days
198316 days
198412 days
198513 days
198615 days
198721 days
198817 days
198913 days
199013 days
199113 days
199221 days
199310 days
199414 days
199518 days
199614 days
199717 days
199813 days
199915 days
200017 days
200120 days
200221 days
200312 days
200414 days
200516 days
200617 days
200713 days
200812 days
200915 days
201011 days
201117 days
201219 days
201312 days
201414 days
201512 days
201610 days
201716 days
201811 days
201915 days
202014 days
202117 days
202213 days
202322 days
202414 days
202515 days
202621 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Wellsville falls on 19 May and the median first autumn frost on 10 October, which leaves a median of 146 days between them.

Frost dates and growing season at Wellsville
MeasureMedian, all yearsEarliest periodRecent period (2005 to 2025)Recent against earliestFitted trend
Last spring frost19 Mayn/a19 Mayn/an/a
First autumn frost10 Octobern/a10 Octobern/an/a
Growing days146 daysn/a146 daysn/an/a

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.

Rainfall Return Levels

61 years, 1957 to 2025

A day with at least 50.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 142.4 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Wellsville: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years50.0 mm (2.0 in)
5 years66.5 mm (2.6 in)
10 years80.1 mm (3.2 in)
25 years101.2 mm (4.0 in)
50 years120.1 mm (4.7 in)
100 years142.4 mm (5.6 in)Longer than the 61 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, 61 years of values from 1957 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: 166.9 mm (6.6 in) in 1972; 110.5 mm (4.4 in) in 1994; 99.3 mm (3.9 in) in 1977.

Download the Data

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