Built 2026-10-19 (19 October 2026)

Sumy Weather Records (UPM00033275)

Record envelope, standing records and threshold days for Sumy (UPM00033275), Ukraine, with 91 years of record.

Key Facts for Sumy

  • Sumy (UPM00033275) is a weather station in Ukraine at 50.85 latitude and 34.67 longitude, 181 m (594 ft) above sea level.
  • The station reports from 1936 to 2026, 91 years of record.
  • 1,464 records set at Sumy still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Sumy set a daily record high minimum temperature of 12.6 C (54.7 F) on 12 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Ukraine, 50.85 latitude, 34.67 longitude.
  • Elevation: 181 m (594 ft).
  • Period of record: 1936 to 2026, 91 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

4 days at or beyond a record
Daily record high and record low at Sumy, with 2026 drawn through them The band shows the record high and record low for each calendar day at Sumy. The lines show the 2026 daily maximum and minimum. 4 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 Sumy. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Sumy, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.8 C (65.8 F)-34.2 C (-29.6 F)5.7 C (42.3 F)-16.7 C (1.9 F)
Feb13.5 C (56.3 F)-32.5 C (-26.5 F)3.7 C (38.7 F)-23.4 C (-10.1 F)
Mar21.5 C (70.7 F)-27.8 C (-18.0 F)14.7 C (58.5 F)-4.4 C (24.1 F)
Apr30.7 C (87.3 F)-11.1 C (12.0 F)18.7 C (65.7 F)-1.6 C (29.1 F)
May33.2 C (91.8 F)-3.9 C (25.0 F)31.1 C (88.0 F)-1.1 C (30.0 F)
Jun36.1 C (97.0 F)0.9 C (33.6 F)31.1 C (88.0 F)6.0 C (42.8 F)
Jul36.1 C (97.0 F)5.0 C (41.0 F)33.6 C (92.5 F)10.8 C (51.4 F)
Aug39.4 C (102.9 F)4.0 C (39.2 F)34.1 C (93.4 F)9.1 C (48.4 F)
Sep34.7 C (94.5 F)-4.3 C (24.3 F)28.1 C (82.6 F)6.5 C (43.7 F)
Oct27.9 C (82.2 F)-11.7 C (10.9 F)20.3 C (68.5 F)3.6 C (38.5 F)
Nov18.4 C (65.1 F)-22.9 C (-9.2 F)n/an/a
Dec11.5 C (52.7 F)-29.5 C (-21.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Sumy by the year they were set 1,464 records at Sumy still stand. 2010 holds the most, with 66. 0204060801949: 81950: 211951: 81952: 261953: 151954: 291955: 111956: 281957: 121958: 111959: 71960: 61962: 21963: 11969: 261970: 101971: 71973: 171974: 161975: 231976: 361977: 221978: 131979: 371980: 241981: 191982: 141983: 231984: 121985: 311986: 181987: 291988: 121989: 191990: 191991: 111992: 131993: 381994: 221995: 201996: 231997: 201998: 251999: 272000: 162001: 162002: 262003: 192004: 192005: 82006: 172007: 202008: 162009: 132010: 662011: 102012: 212013: 262014: 282015: 262016: 162017: 122018: 262019: 242020: 302021: 312022: 102023: 252024: 602025: 612026: 11194919571971198019881996200420122020
1,464 records at Sumy still stand. 2010 holds the most, with 66.
Standing records at Sumy by the year they were set
Year setStanding records
19498
195021
19518
195226
195315
195429
195511
195628
195712
195811
19597
19606
19622
19631
196926
197010
19717
197317
197416
197523
197636
197722
197813
197937
198024
198119
198214
198323
198412
198531
198618
198729
198812
198919
199019
199111
199213
199338
199422
199520
199623
199720
199825
199927
200016
200116
200226
200319
200419
20058
200617
200720
200816
200913
201066
201110
201221
201326
201428
201526
201616
201712
201826
201924
202030
202131
202210
202325
202460
202561
202611

All-Time Record Progression

6 new records
When Sumy set new all-time records 6 all-time records were set at Sumy between 25 August 1994 and 10 July 2025. Each dot is a new record. Record daily precipitationRecord high maximum temperatureRecord high minimum temperature25 August 1994: Record daily precipitation 101.1 mm (4.0 in)14 June 1998: Record high maximum temperature 36.1 C (97.0 F)1 August 2010: Record high maximum temperature 37.8 C (100.0 F)2 August 2010: Record high maximum temperature 39.1 C (102.4 F)5 August 2010: Record high maximum temperature 39.4 C (102.9 F)10 July 2025: Record high minimum temperature 23.1 C (73.6 F)1995200020052010201520202025
6 all-time records were set at Sumy between 25 August 1994 and 10 July 2025. Each dot is a new record.
When Sumy set new all-time records
DateKindDetail
1994-08-25Record daily precipitationRecord daily precipitation 101.1 mm (4.0 in)
1998-06-14Record high maximum temperatureRecord high maximum temperature 36.1 C (97.0 F)
2010-08-01Record high maximum temperatureRecord high maximum temperature 37.8 C (100.0 F)
2010-08-02Record high maximum temperatureRecord high maximum temperature 39.1 C (102.4 F)
2010-08-05Record high maximum temperatureRecord high maximum temperature 39.4 C (102.9 F)
2025-07-10Record high minimum temperatureRecord high minimum temperature 23.1 C (73.6 F)

Wettest Day of Each Month

Aug: 101.1 mm (4.0 in)
Record daily precipitation for each month at Sumy The wettest day on record for each calendar month at Sumy. The most was 101.1 mm (4.0 in) on 25 August 1994. 050100150 Jan: 53.1 mm (2.1 in), 8 January 1976 Jan Feb: 28.0 mm (1.1 in), 16 February 2026 Feb Mar: 53.1 mm (2.1 in), 18 March 1976 Mar Apr: 36.1 mm (1.4 in), 12 April 2022 Apr May: 44.0 mm (1.7 in), 3 May 1983 May Jun: 60.5 mm (2.4 in), 27 June 2014 Jun Jul: 72.5 mm (2.9 in), 30 July 1942 Jul Aug: 101.1 mm (4.0 in), 25 August 1994 Aug Sep: 50.0 mm (2.0 in), 24 September 2014 Sep Oct: 53.1 mm (2.1 in), 5 October 1994 Oct Nov: 42.9 mm (1.7 in), 19 November 1999 Nov Dec: 34.0 mm (1.3 in), 18 December 1975 Dec
The wettest day on record for each calendar month at Sumy. The most was 101.1 mm (4.0 in) on 25 August 1994.
Record daily precipitation for each month at Sumy
MonthRecord daily precipitation (mm)Date
Jan53.1 mm (2.1 in)8 January 1976
Feb28.0 mm (1.1 in)16 February 2026
Mar53.1 mm (2.1 in)18 March 1976
Apr36.1 mm (1.4 in)12 April 2022
May44.0 mm (1.7 in)3 May 1983
Jun60.5 mm (2.4 in)27 June 2014
Jul72.5 mm (2.9 in)30 July 1942
Aug101.1 mm (4.0 in)25 August 1994
Sep50.0 mm (2.0 in)24 September 2014
Oct53.1 mm (2.1 in)5 October 1994
Nov42.9 mm (1.7 in)19 November 1999
Dec34.0 mm (1.3 in)18 December 1975

Period of Record Coverage

1949 to 2026
Days with data per year at Sumy 72 years of record at Sumy, 1949 to 2026. 61 years have data for under 90 percent of days and are left out of rankings: 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956 and others. 1949: 59 of 365 days1950: 151 of 365 days1951: 179 of 365 days1952: 201 of 366 days1953: 195 of 365 days1954: 220 of 365 days1955: 170 of 365 days1956: 186 of 366 days1957: 262 of 365 days1958: 121 of 365 days1959: 34 of 365 days1960: 38 of 366 days1961: 17 of 365 days1962: 21 of 365 days1963: 13 of 365 days1969: 328 of 365 days1970: 327 of 365 days1971: 163 of 365 days1973: 301 of 365 days1974: 315 of 365 days1975: 307 of 365 days1976: 312 of 366 days1977: 306 of 365 days1978: 319 of 365 days1979: 320 of 365 days1980: 317 of 366 days1981: 317 of 365 days1982: 298 of 365 days1983: 289 of 365 days1984: 294 of 366 days1985: 296 of 365 days1986: 289 of 365 days1987: 291 of 365 days1988: 302 of 366 days1989: 313 of 365 days1990: 307 of 365 days1991: 316 of 365 days1992: 301 of 366 days1993: 311 of 365 days1994: 297 of 365 days1995: 301 of 365 days1996: 318 of 366 days1997: 311 of 365 days1998: 296 of 365 days1999: 299 of 365 days2000: 313 of 366 days2001: 344 of 365 days2002: 179 of 365 days2003: 343 of 365 days2004: 283 of 366 days2005: 165 of 365 days2006: 199 of 365 days2007: 120 of 365 days2008: 85 of 366 days2009: 203 of 365 days2010: 331 of 365 days2011: 338 of 365 days2012: 332 of 366 days2013: 328 of 365 days2014: 340 of 365 days2015: 337 of 365 days2016: 331 of 366 days2017: 332 of 365 days2018: 328 of 365 days2019: 328 of 365 days2020: 336 of 366 days2021: 318 of 365 days2022: 269 of 365 days2023: 323 of 365 days2024: 319 of 366 days2025: 347 of 365 days2026: 275 of 365 days19501960197019801990200020102020
72 years of record at Sumy, 1949 to 2026. 61 years have data for under 90 percent of days and are left out of rankings: 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956 and others.
Days with data per year at Sumy
YearDays with dataShare of yearComplete
19495916%No
195015141%No
195117949%No
195220155%No
195319553%No
195422060%No
195517047%No
195618651%No
195726272%No
195812133%No
1959349%No
19603810%No
1961175%No
1962216%No
1963134%No
196932890%No
197032790%No
197116345%No
197330182%No
197431586%No
197530784%No
197631285%No
197730684%No
197831987%No
197932088%No
198031787%No
198131787%No
198229882%No
198328979%No
198429480%No
198529681%No
198628979%No
198729180%No
198830283%No
198931386%No
199030784%No
199131687%No
199230182%No
199331185%No
199429781%No
199530182%No
199631887%No
199731185%No
199829681%No
199929982%No
200031386%No
200134494%Yes
200217949%No
200334394%Yes
200428377%No
200516545%No
200619955%No
200712033%No
20088523%No
200920356%No
201033191%Yes
201133893%Yes
201233291%Yes
201332890%No
201434093%Yes
201533792%Yes
201633190%Yes
201733291%Yes
201832890%No
201932890%No
202033692%Yes
202131887%No
202226974%No
202332388%No
202431987%No
202534795%Yes
202627575%No

Latest Records

20
Latest records at Sumy
DateStationRecordValueBeat old record byOld record stoodSignificance
12 October 2026Sumy, UAdaily high min (Provisional)12.6 C (54.7 F)0.4 C (0.7 F)65 years26 of 100 (Routine)
12 October 2026Sumy, UAdaily high max (Provisional)20.3 C (68.5 F)0.5 C (0.9 F)12 years10 of 100 (Routine)
23 August 2026Sumy, UAdaily high min (Provisional)18.3 C (64.9 F)0.2 C (0.4 F)25 years14 of 100 (Routine)
22 August 2026Sumy, UAdaily high min (Provisional)19.3 C (66.7 F)0.3 C (0.5 F)44 years20 of 100 (Routine)
21 August 2026Sumy, UAdaily high min (Provisional)20.1 C (68.2 F)0.9 C (1.6 F)29 years17 of 100 (Routine)
5 July 2026Sumy, UAdaily low max17.9 C (64.2 F)0.1 C (0.2 F)52 years22 of 100 (Routine)
23 May 2026Sumy, UAdaily high min17.4 C (63.3 F)1.6 C (2.9 F)43 years23 of 100 (Routine)
22 May 2026Sumy, UAdaily high max31.1 C (88.0 F)1.7 C (3.1 F)12 years13 of 100 (Routine)
21 May 2026Sumy, UAdaily high max30.1 C (86.2 F)0.1 C (0.2 F)51 years22 of 100 (Routine)
20 May 2026Sumy, UAdaily high min18.6 C (65.5 F)1.4 C (2.5 F)72 years31 of 100 (Routine)
2 May 2026Sumy, UAdaily low min-1.1 C (30.0 F)1.1 C (2.0 F)55 years25 of 100 (Routine)
29 April 2026Sumy, UAdaily low max7.4 C (45.3 F)0.9 C (1.6 F)37 years19 of 100 (Routine)
24 April 2026Sumy, UAdaily low max5.2 C (41.4 F)0.9 C (1.6 F)55 years24 of 100 (Routine)
19 February 2026Sumy, UAdaily rain26.0 mm (1.0 in)12.7 mm (0.5 in)58 years66 of 100 (Major)
16 February 2026Sumy, UAmonthly rain28.0 mm (1.1 in)2.4 mm (0.09 in)88 years52 of 100 (Notable)
15 February 2026Sumy, UAdaily high min0.9 C (33.6 F)0.3 C (0.5 F)10 years10 of 100 (Routine)
2 February 2026Sumy, UAdaily low max-18.1 C (-0.6 F)1.0 C (1.8 F)14 years12 of 100 (Routine)
29 January 2026Sumy, UAdaily rain14.0 mm (0.6 in)7.9 mm (0.31 in)74 years20 of 100 (Routine)
7 January 2026Sumy, UAdaily high min2.0 C (35.6 F)0.7 C (1.3 F)24 years14 of 100 (Routine)
26 November 2025Sumy, UAdaily high min5.1 C (41.2 F)0.7 C (1.3 F)16 years12 of 100 (Routine)

Extremes by Year

1936 to 2026
Yearly extremes at Sumy: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)201033.3 C (91.9 F)72
Coldest night (TNn)-34.2 C (-29.6 F)1987-23.8 C (-10.9 F)72
Wettest day (Rx1day)101.1 mm (4.0 in)199434.0 mm (1.3 in)89
Wettest five days (Rx5day)131.7 mm (5.2 in)197349.3 mm (1.9 in)82
Longest dry spell (CDD)41 days197516 days89

Hottest day (TXx)

Hottest day (TXx) at Sumy by year The hottest day of the year at Sumy, 1936 to 2026. The record is 39.4 C (102.9 F) in 2010, marked on the chart; the median year is 33.3 C (91.9 F). 202530354019401960198020002020Record: 39.4 C (102.9 F) in 2010
The hottest day of the year at Sumy, 1936 to 2026. The record is 39.4 C (102.9 F) in 2010, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Sumy by year
YearHottest day (TXx)
1936n/a
1937n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
194930.0 C (86.0 F)
195030.0 C (86.0 F)
195132.8 C (91.0 F)
195233.9 C (93.0 F)
195331.1 C (88.0 F)
195435.0 C (95.0 F)
195533.9 C (93.0 F)
195632.8 C (91.0 F)
195733.9 C (93.0 F)
195832.2 C (90.0 F)
195923.9 C (75.0 F)
196027.2 C (81.0 F)
196130.0 C (86.0 F)
196222.8 C (73.0 F)
196328.9 C (84.0 F)
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
196933.9 C (93.0 F)
197035.0 C (95.0 F)
197132.2 C (90.0 F)
1972n/a
197330.0 C (86.0 F)
197432.0 C (89.6 F)
197535.0 C (95.0 F)
197629.0 C (84.2 F)
197730.0 C (86.0 F)
197830.0 C (86.0 F)
197933.0 C (91.4 F)
198031.0 C (87.8 F)
198135.0 C (95.0 F)
198228.4 C (83.1 F)
198331.5 C (88.7 F)
198433.0 C (91.4 F)
198530.8 C (87.4 F)
198633.0 C (91.4 F)
198733.0 C (91.4 F)
198830.9 C (87.6 F)
198932.8 C (91.0 F)
199031.0 C (87.8 F)
199134.1 C (93.4 F)
199233.6 C (92.5 F)
199332.4 C (90.3 F)
199433.6 C (92.5 F)
199531.3 C (88.3 F)
199635.0 C (95.0 F)
199730.1 C (86.2 F)
199836.1 C (97.0 F)
199935.0 C (95.0 F)
200034.4 C (93.9 F)
200135.9 C (96.6 F)
200234.3 C (93.7 F)
200331.4 C (88.5 F)
200431.4 C (88.5 F)
200532.4 C (90.3 F)
200634.8 C (94.6 F)
200735.5 C (95.9 F)
200834.9 C (94.8 F)
200934.3 C (93.7 F)
201039.4 C (102.9 F)
201133.6 C (92.5 F)
201236.4 C (97.5 F)
201332.6 C (90.7 F)
201434.9 C (94.8 F)
201534.7 C (94.5 F)
201636.0 C (96.8 F)
201733.8 C (92.8 F)
201833.8 C (92.8 F)
201933.5 C (92.3 F)
202034.0 C (93.2 F)
202135.3 C (95.5 F)
202232.9 C (91.2 F)
202335.0 C (95.0 F)
202436.4 C (97.5 F)
202536.0 C (96.8 F)
202634.1 C (93.4 F)

Coldest night (TNn)

Coldest night (TNn) at Sumy by year The coldest night of the year at Sumy, 1936 to 2026. The record is -34.2 C (-29.6 F) in 1987, marked on the chart; the median year is -23.8 C (-10.9 F). -40-30-20-10019401960198020002020Record: -34.2 C (-29.6 F) in 1987
The coldest night of the year at Sumy, 1936 to 2026. The record is -34.2 C (-29.6 F) in 1987, marked on the chart; the median year is -23.8 C (-10.9 F).
Coldest night (TNn) at Sumy by year
YearColdest night (TNn)
1936n/a
1937n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949-12.2 C (10.0 F)
1950-32.2 C (-26.0 F)
1951-25.0 C (-13.0 F)
1952-22.8 C (-9.0 F)
1953-27.2 C (-17.0 F)
1954-32.2 C (-26.0 F)
1955-18.9 C (-2.0 F)
1956-32.2 C (-26.0 F)
1957-23.9 C (-11.0 F)
1958-22.8 C (-9.0 F)
1959-25.0 C (-13.0 F)
1960-17.2 C (1.0 F)
1961-5.0 C (23.0 F)
1962-22.2 C (-8.0 F)
1963-26.1 C (-15.0 F)
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969-28.9 C (-20.0 F)
1970-30.0 C (-22.0 F)
1971-22.2 C (-8.0 F)
1972n/a
1973-28.0 C (-18.4 F)
1974-18.0 C (-0.4 F)
1975-24.0 C (-11.2 F)
1976-29.0 C (-20.2 F)
1977-24.0 C (-11.2 F)
1978-27.0 C (-16.6 F)
1979-30.0 C (-22.0 F)
1980-27.0 C (-16.6 F)
1981-18.0 C (-0.4 F)
1982-25.3 C (-13.5 F)
1983-21.1 C (-6.0 F)
1984-20.3 C (-4.5 F)
1985-32.5 C (-26.5 F)
1986-27.6 C (-17.7 F)
1987-34.2 C (-29.6 F)
1988-26.4 C (-15.5 F)
1989-20.8 C (-5.4 F)
1990-17.1 C (1.2 F)
1991-23.5 C (-10.3 F)
1992-17.5 C (0.5 F)
1993-22.9 C (-9.2 F)
1994-27.4 C (-17.3 F)
1995-26.3 C (-15.3 F)
1996-27.7 C (-17.9 F)
1997-29.5 C (-21.1 F)
1998-24.5 C (-12.1 F)
1999-22.9 C (-9.2 F)
2000-24.7 C (-12.5 F)
2001-21.8 C (-7.2 F)
2002-21.2 C (-6.2 F)
2003-26.9 C (-16.4 F)
2004-21.5 C (-6.7 F)
2005-22.3 C (-8.1 F)
2006-28.1 C (-18.6 F)
2007-23.8 C (-10.8 F)
2008-18.9 C (-2.0 F)
2009-25.6 C (-14.1 F)
2010-26.7 C (-16.1 F)
2011-22.4 C (-8.3 F)
2012-27.5 C (-17.5 F)
2013-21.1 C (-6.0 F)
2014-25.7 C (-14.3 F)
2015-22.6 C (-8.7 F)
2016-26.4 C (-15.5 F)
2017-23.4 C (-10.1 F)
2018-21.0 C (-5.8 F)
2019-20.8 C (-5.4 F)
2020-14.4 C (6.1 F)
2021-24.4 C (-11.9 F)
2022-18.6 C (-1.5 F)
2023-19.8 C (-3.6 F)
2024-23.4 C (-10.1 F)
2025-15.6 C (3.9 F)
2026-23.4 C (-10.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Sumy by year The wettest day of the year at Sumy, 1936 to 2026. The record is 101.1 mm (4.0 in) in 1994, marked on the chart; the median year is 34.0 mm (1.3 in). 025507510012519401960198020002020Record: 101.1 mm (4.0 in) in 1994
The wettest day of the year at Sumy, 1936 to 2026. The record is 101.1 mm (4.0 in) in 1994, marked on the chart; the median year is 34.0 mm (1.3 in).
Wettest day (Rx1day) at Sumy by year
YearWettest day (Rx1day)
193631.2 mm (1.2 in)
193731.5 mm (1.2 in)
194020.9 mm (0.8 in)
194164.6 mm (2.5 in)
194272.5 mm (2.9 in)
194332.4 mm (1.3 in)
194436.0 mm (1.4 in)
194535.6 mm (1.4 in)
194633.3 mm (1.3 in)
194733.3 mm (1.3 in)
194844.8 mm (1.8 in)
194935.6 mm (1.4 in)
195025.3 mm (1.0 in)
195129.0 mm (1.1 in)
195229.7 mm (1.2 in)
195313.0 mm (0.5 in)
195442.9 mm (1.7 in)
195519.8 mm (0.8 in)
195642.2 mm (1.7 in)
195720.4 mm (0.8 in)
195856.7 mm (2.2 in)
195925.0 mm (1.0 in)
196029.7 mm (1.2 in)
196132.4 mm (1.3 in)
196232.5 mm (1.3 in)
196337.2 mm (1.5 in)
196429.1 mm (1.1 in)
196538.3 mm (1.5 in)
196632.9 mm (1.3 in)
196741.2 mm (1.6 in)
196821.4 mm (0.8 in)
196925.4 mm (1.0 in)
197038.4 mm (1.5 in)
197141.0 mm (1.6 in)
197239.3 mm (1.5 in)
197362.8 mm (2.5 in)
197421.8 mm (0.9 in)
197534.0 mm (1.3 in)
197654.1 mm (2.1 in)
197740.0 mm (1.6 in)
197838.4 mm (1.5 in)
197936.9 mm (1.5 in)
198072.4 mm (2.9 in)
198132.3 mm (1.3 in)
198232.0 mm (1.3 in)
198344.0 mm (1.7 in)
198423.0 mm (0.9 in)
198536.9 mm (1.5 in)
198647.6 mm (1.9 in)
198725.0 mm (1.0 in)
198833.0 mm (1.3 in)
198922.7 mm (0.9 in)
199033.2 mm (1.3 in)
199152.1 mm (2.1 in)
199247.0 mm (1.9 in)
199364.0 mm (2.5 in)
1994101.1 mm (4.0 in)
199538.1 mm (1.5 in)
199631.0 mm (1.2 in)
199729.0 mm (1.1 in)
199830.0 mm (1.2 in)
199942.9 mm (1.7 in)
200043.0 mm (1.7 in)
200127.0 mm (1.1 in)
200224.0 mm (0.9 in)
200341.0 mm (1.6 in)
200416.0 mm (0.6 in)
200521.0 mm (0.8 in)
200632.0 mm (1.3 in)
200734.0 mm (1.3 in)
200826.0 mm (1.0 in)
200939.1 mm (1.5 in)
201038.1 mm (1.5 in)
201149.5 mm (1.9 in)
201220.1 mm (0.8 in)
201349.0 mm (1.9 in)
201460.5 mm (2.4 in)
201538.1 mm (1.5 in)
201673.9 mm (2.9 in)
201745.7 mm (1.8 in)
201820.1 mm (0.8 in)
201913.0 mm (0.5 in)
202038.1 mm (1.5 in)
202120.1 mm (0.8 in)
202239.9 mm (1.6 in)
202352.1 mm (2.1 in)
202423.1 mm (0.9 in)
202530.5 mm (1.2 in)
202628.0 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Sumy by year The wettest five days of the year at Sumy, 1936 to 2026. The record is 131.7 mm (5.2 in) in 1973, marked on the chart; the median year is 49.3 mm (1.9 in). 05010015019401960198020002020Record: 131.7 mm (5.2 in) in 1973
The wettest five days of the year at Sumy, 1936 to 2026. The record is 131.7 mm (5.2 in) in 1973, marked on the chart; the median year is 49.3 mm (1.9 in).
Wettest five days (Rx5day) at Sumy by year
YearWettest five days (Rx5day)
193650.2 mm (2.0 in)
193761.3 mm (2.4 in)
194052.6 mm (2.1 in)
194177.5 mm (3.1 in)
194272.7 mm (2.9 in)
194355.0 mm (2.2 in)
194441.8 mm (1.6 in)
194533.4 mm (1.3 in)
194657.6 mm (2.3 in)
194744.0 mm (1.7 in)
194859.6 mm (2.3 in)
194937.4 mm (1.5 in)
195044.1 mm (1.7 in)
195118.0 mm (0.7 in)
195261.6 mm (2.4 in)
195320.7 mm (0.8 in)
195477.0 mm (3.0 in)
195525.0 mm (1.0 in)
195666.5 mm (2.6 in)
195731.8 mm (1.3 in)
195875.3 mm (3.0 in)
195951.7 mm (2.0 in)
196053.6 mm (2.1 in)
196171.0 mm (2.8 in)
196245.9 mm (1.8 in)
196354.8 mm (2.2 in)
196460.4 mm (2.4 in)
196548.4 mm (1.9 in)
196653.4 mm (2.1 in)
196754.9 mm (2.2 in)
196840.6 mm (1.6 in)
196942.4 mm (1.7 in)
197099.9 mm (3.9 in)
197181.0 mm (3.2 in)
197274.4 mm (2.9 in)
1973131.7 mm (5.2 in)
197439.2 mm (1.5 in)
197543.7 mm (1.7 in)
197699.3 mm (3.9 in)
197750.3 mm (2.0 in)
197880.2 mm (3.2 in)
197984.6 mm (3.3 in)
198087.8 mm (3.5 in)
198158.0 mm (2.3 in)
198260.7 mm (2.4 in)
198391.2 mm (3.6 in)
198437.5 mm (1.5 in)
198578.1 mm (3.1 in)
1986100.3 mm (3.9 in)
198739.2 mm (1.5 in)
198869.3 mm (2.7 in)
198942.3 mm (1.7 in)
199061.9 mm (2.4 in)
199121.9 mm (0.9 in)
199283.3 mm (3.3 in)
199383.6 mm (3.3 in)
199424.8 mm (1.0 in)
199510.7 mm (0.4 in)
199644.9 mm (1.8 in)
199734.3 mm (1.4 in)
199848.1 mm (1.9 in)
199945.0 mm (1.8 in)
200052.0 mm (2.0 in)
200166.0 mm (2.6 in)
200216.0 mm (0.6 in)
200328.1 mm (1.1 in)
200430.1 mm (1.2 in)
200511.0 mm (0.4 in)
200632.1 mm (1.3 in)
200721.6 mm (0.9 in)
20085.5 mm (0.22 in)
2009n/a
2010n/a
201127.7 mm (1.1 in)
201249.3 mm (1.9 in)
201349.6 mm (2.0 in)
20144.0 mm (0.16 in)
20153.8 mm (0.15 in)
201623.2 mm (0.9 in)
201749.2 mm (1.9 in)
201825.9 mm (1.0 in)
2019n/a
2020n/a
2021n/a
202235.0 mm (1.4 in)
2023n/a
2024n/a
202515.6 mm (0.6 in)
202640.7 mm (1.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Sumy by year The longest dry spell of the year at Sumy, 1936 to 2026. The record is 41 days in 1975, marked on the chart; the median year is 16 days. 0102030405019401960198020002020Record: 41 days in 1975
The longest dry spell of the year at Sumy, 1936 to 2026. The record is 41 days in 1975, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Sumy by year
YearLongest dry spell (CDD)
193620 days
193727 days
194019 days
194113 days
194215 days
194324 days
194429 days
194514 days
194623 days
194720 days
194822 days
194922 days
195013 days
195111 days
195223 days
19539 days
195429 days
195519 days
195620 days
195721 days
195826 days
195919 days
196017 days
196124 days
196219 days
196316 days
196416 days
196525 days
196625 days
196717 days
196822 days
196919 days
197018 days
197129 days
197230 days
197323 days
197427 days
197541 days
197625 days
197715 days
197819 days
197927 days
198016 days
198130 days
198226 days
198328 days
198419 days
198524 days
198628 days
198737 days
198828 days
198926 days
199016 days
19919 days
199212 days
199322 days
19947 days
19953 days
19962 days
19972 days
19982 days
199916 days
20004 days
20014 days
20023 days
20037 days
20049 days
20053 days
20065 days
20074 days
20083 days
20094 days
20102 days
20113 days
20124 days
20137 days
20142 days
20153 days
20163 days
20172 days
20184 days
20192 days
20202 days
20212 days
20223 days
20232 days
20242 days
20252 days
20265 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

43 years, 1937 to 1993

A day with at least 34.6 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 75.3 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Sumy: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years34.6 mm (1.4 in)
5 years45.0 mm (1.8 in)
10 years52.1 mm (2.1 in)
25 years61.2 mm (2.4 in)
50 years68.2 mm (2.7 in)Longer than the 43 years of record
100 years75.3 mm (3.0 in)Longer than the 43 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, 43 years of values from 1937 to 1993.

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: 72.4 mm (2.9 in) in 1980; 64.0 mm (2.5 in) in 1993; 62.8 mm (2.5 in) in 1973.

Download the Data

  • Data for Sumy standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Sumy 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-17).