Built 2026-10-15 (15 October 2026)

Olney Weather Records (USC00416636)

Record envelope, standing records and threshold days for Olney (USC00416636), Texas, United States, with 56 years of record.

Key Facts for Olney

  • Olney (USC00416636) is a weather station in Texas, United States at 33.37 latitude and -98.77 longitude, 364 m (1,195 ft) above sea level.
  • The station reports from 1956 to 2011, 56 years of record.
  • 1,464 records set at Olney still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Olney set a daily record high minimum temperature of 26.7 C (80.1 F) on 12 August 2011.

About the Station

  • Location: Texas, United States, 33.37 latitude, -98.77 longitude.
  • Elevation: 364 m (1,195 ft).
  • Period of record: 1956 to 2011, 56 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Olney, with 2026 drawn through them The band shows the record high and record low for each calendar day at Olney. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Olney. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Olney, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan29.4 C (84.9 F)-20.6 C (-5.1 F)n/an/a
Feb35.0 C (95.0 F)-21.1 C (-6.0 F)n/an/a
Mar37.2 C (99.0 F)-11.7 C (10.9 F)n/an/a
Apr38.3 C (100.9 F)-3.3 C (26.1 F)n/an/a
May43.9 C (111.0 F)2.2 C (36.0 F)n/an/a
Jun45.6 C (114.1 F)9.4 C (48.9 F)n/an/a
Jul46.7 C (116.1 F)12.8 C (55.0 F)n/an/a
Aug43.9 C (111.0 F)11.7 C (53.1 F)n/an/a
Sep43.9 C (111.0 F)3.3 C (37.9 F)n/an/a
Oct39.4 C (102.9 F)-6.1 C (21.0 F)n/an/a
Nov32.8 C (91.0 F)-12.2 C (10.0 F)n/an/a
Dec30.0 C (86.0 F)-21.7 C (-7.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Olney by the year they were set 1,464 records at Olney still stand. 2011 holds the most, with 60. 02040601956: 391957: 221958: 381959: 351960: 311961: 281962: 291963: 261964: 171965: 361966: 301967: 381968: 131969: 271970: 261971: 311972: 291973: 131974: 401975: 181976: 301977: 331978: 351979: 261980: 311981: 151982: 231983: 391984: 371985: 281986: 271987: 191988: 91989: 481990: 301991: 231992: 281993: 191994: 151995: 211996: 271997: 311998: 211999: 112000: 352001: 92002: 212003: 332004: 152005: 32006: 102007: 252008: 192009: 252010: 172011: 601956196219681974198019861992199820042010
1,464 records at Olney still stand. 2011 holds the most, with 60.
Standing records at Olney by the year they were set
Year setStanding records
195639
195722
195838
195935
196031
196128
196229
196326
196417
196536
196630
196738
196813
196927
197026
197131
197229
197313
197440
197518
197630
197733
197835
197926
198031
198115
198223
198339
198437
198528
198627
198719
19889
198948
199030
199123
199228
199319
199415
199521
199627
199731
199821
199911
200035
20019
200221
200333
200415
20053
200610
200725
200819
200925
201017
201160

All-Time Record Progression

4 new records
When Olney set new all-time records 4 all-time records were set at Olney between 16 May 1989 and 28 July 2004. Each dot is a new record. Record daily precipitationRecord low minimum temperatureRecord low maximum temperature16 May 1989: Record daily precipitation 216.9 mm (8.5 in)23 December 1989: Record low minimum temperature -21.7 C (-7.1 F)22 December 1990: Record low maximum temperature -11.7 C (10.9 F)28 July 2004: Record daily precipitation 222.0 mm (8.7 in)1990199520002005
4 all-time records were set at Olney between 16 May 1989 and 28 July 2004. Each dot is a new record.
When Olney set new all-time records
DateKindDetail
1989-05-16Record daily precipitationRecord daily precipitation 216.9 mm (8.5 in)
1989-12-23Record low minimum temperatureRecord low minimum temperature -21.7 C (-7.1 F)
1990-12-22Record low maximum temperatureRecord low maximum temperature -11.7 C (10.9 F)
2004-07-28Record daily precipitationRecord daily precipitation 222.0 mm (8.7 in)

Wettest Day of Each Month

Jul: 222.0 mm (8.7 in)
Record daily precipitation for each month at Olney The wettest day on record for each calendar month at Olney. The most was 222.0 mm (8.7 in) on 28 July 2004. 0100200300 Jan: 78.7 mm (3.1 in), 3 January 2005 Jan Feb: 53.3 mm (2.1 in), 20 February 1997 Feb Mar: 69.9 mm (2.8 in), 24 March 2001 Mar Apr: 103.6 mm (4.1 in), 24 April 2004 Apr May: 216.9 mm (8.5 in), 16 May 1989 May Jun: 157.5 mm (6.2 in), 14 June 1983 Jun Jul: 222.0 mm (8.7 in), 28 July 2004 Jul Aug: 91.7 mm (3.6 in), 30 August 2003 Aug Sep: 118.6 mm (4.7 in), 28 September 1980 Sep Oct: 117.1 mm (4.6 in), 3 October 1959 Oct Nov: 66.0 mm (2.6 in), 15 November 2004 Nov Dec: 61.5 mm (2.4 in), 19 December 1987 Dec
The wettest day on record for each calendar month at Olney. The most was 222.0 mm (8.7 in) on 28 July 2004.
Record daily precipitation for each month at Olney
MonthRecord daily precipitation (mm)Date
Jan78.7 mm (3.1 in)3 January 2005
Feb53.3 mm (2.1 in)20 February 1997
Mar69.9 mm (2.8 in)24 March 2001
Apr103.6 mm (4.1 in)24 April 2004
May216.9 mm (8.5 in)16 May 1989
Jun157.5 mm (6.2 in)14 June 1983
Jul222.0 mm (8.7 in)28 July 2004
Aug91.7 mm (3.6 in)30 August 2003
Sep118.6 mm (4.7 in)28 September 1980
Oct117.1 mm (4.6 in)3 October 1959
Nov66.0 mm (2.6 in)15 November 2004
Dec61.5 mm (2.4 in)19 December 1987

Period of Record Coverage

1956 to 2011
Days with data per year at Olney 56 years of record at Olney, 1956 to 2011. 20 years have data for under 90 percent of days and are left out of rankings: 1966, 1970, 1972, 1973, 1978, 1979, 1980, 1985 and others. 1956: 340 of 366 days1957: 330 of 365 days1958: 330 of 365 days1959: 340 of 365 days1960: 355 of 366 days1961: 339 of 365 days1962: 350 of 365 days1963: 353 of 365 days1964: 357 of 366 days1965: 350 of 365 days1966: 314 of 365 days1967: 341 of 365 days1968: 357 of 366 days1969: 347 of 365 days1970: 324 of 365 days1971: 362 of 365 days1972: 322 of 366 days1973: 261 of 365 days1974: 350 of 365 days1975: 336 of 365 days1976: 346 of 366 days1977: 329 of 365 days1978: 243 of 365 days1979: 291 of 365 days1980: 264 of 366 days1981: 349 of 365 days1982: 329 of 365 days1983: 351 of 365 days1984: 337 of 366 days1985: 322 of 365 days1986: 330 of 365 days1987: 354 of 365 days1988: 337 of 366 days1989: 323 of 365 days1990: 358 of 365 days1991: 333 of 365 days1992: 274 of 366 days1993: 357 of 365 days1994: 339 of 365 days1995: 318 of 365 days1996: 357 of 366 days1997: 335 of 365 days1998: 316 of 365 days1999: 312 of 365 days2000: 330 of 366 days2001: 325 of 365 days2002: 329 of 365 days2003: 321 of 365 days2004: 328 of 366 days2005: 110 of 365 days2006: 122 of 365 days2007: 354 of 365 days2008: 363 of 366 days2009: 322 of 365 days2010: 350 of 365 days2011: 225 of 365 days196019701980199020002010
56 years of record at Olney, 1956 to 2011. 20 years have data for under 90 percent of days and are left out of rankings: 1966, 1970, 1972, 1973, 1978, 1979, 1980, 1985 and others.
Days with data per year at Olney
YearDays with dataShare of yearComplete
195634093%Yes
195733090%Yes
195833090%Yes
195934093%Yes
196035597%Yes
196133993%Yes
196235096%Yes
196335397%Yes
196435798%Yes
196535096%Yes
196631486%No
196734193%Yes
196835798%Yes
196934795%Yes
197032489%No
197136299%Yes
197232288%No
197326172%No
197435096%Yes
197533692%Yes
197634695%Yes
197732990%Yes
197824367%No
197929180%No
198026472%No
198134996%Yes
198232990%Yes
198335196%Yes
198433792%Yes
198532288%No
198633090%Yes
198735497%Yes
198833792%Yes
198932388%No
199035898%Yes
199133391%Yes
199227475%No
199335798%Yes
199433993%Yes
199531887%No
199635798%Yes
199733592%Yes
199831687%No
199931285%No
200033090%Yes
200132589%No
200232990%Yes
200332188%No
200432890%No
200511030%No
200612233%No
200735497%Yes
200836399%Yes
200932288%No
201035096%Yes
201122562%No

Latest Records

20
Latest records at Olney
DateStationRecordValueBeat old record byOld record stoodSignificance
12 August 2011Olney, USdaily high min26.7 C (80.1 F)1.1 C (2.0 F)12 years12 of 100 (Routine)
11 August 2011Olney, USdaily high min27.2 C (81.0 F)0.5 C (0.9 F)46 years21 of 100 (Routine)
11 August 2011Olney, USdaily high max42.8 C (109.0 F)0.6 C (1.1 F)41 years18 of 100 (Routine)
10 August 2011Olney, USdaily high min27.2 C (81.0 F)1.6 C (2.9 F)46 years25 of 100 (Routine)
10 August 2011Olney, USdaily high max43.3 C (109.9 F)1.6 C (2.9 F)12 years12 of 100 (Routine)
9 August 2011Olney, USdaily high min27.8 C (82.0 F)1.7 C (3.1 F)40 years24 of 100 (Routine)
9 August 2011Olney, USdaily high max42.2 C (108.0 F)1.1 C (2.0 F)40 years20 of 100 (Routine)
8 August 2011Olney, USmonthly high min28.3 C (82.9 F)0.5 C (0.9 F)31 years26 of 100 (Routine)
7 August 2011Olney, USdaily high min27.2 C (81.0 F)0.5 C (0.9 F)10 years10 of 100 (Routine)
6 August 2011Olney, USmonthly high min (Tie)27.8 C (82.0 F)tie31 years6 of 100 (Routine)
6 August 2011Olney, USmonthly high max (Tie)43.9 C (111.0 F)tie27 years5 of 100 (Routine)
5 August 2011Olney, USdaily high max43.3 C (109.9 F)1.6 C (2.9 F)46 years23 of 100 (Routine)
4 August 2011Olney, USdaily high min26.1 C (79.0 F)0.5 C (0.9 F)30 years16 of 100 (Routine)
4 August 2011Olney, USmonthly high max (Tie)43.9 C (111.0 F)tie27 years5 of 100 (Routine)
3 August 2011Olney, USmonthly high max (Tie)43.9 C (111.0 F)tie27 years5 of 100 (Routine)
2 August 2011Olney, USdaily high max42.2 C (108.0 F)0.5 C (0.9 F)30 years15 of 100 (Routine)
29 July 2011Olney, USdaily high min26.7 C (80.1 F)0.6 C (1.1 F)12 years10 of 100 (Routine)
28 July 2011Olney, USdaily high min26.7 C (80.1 F)0.6 C (1.1 F)46 years21 of 100 (Routine)
27 July 2011Olney, USdaily high max42.8 C (109.0 F)1.1 C (2.0 F)24 years15 of 100 (Routine)
27 July 2011Olney, USdaily high min26.7 C (80.1 F)1.1 C (2.0 F)12 years13 of 100 (Routine)

Climate Trend

27 complete years, 1959 to 2010
Annual mean temperature at Olney as warming stripes, 1959 to 2010 One stripe for each of 27 complete years at Olney, 1959 to 2010. Blue stripes are years cooler than the station's own mean of 18.0 C (64.5 F); red stripes are warmer. The coolest year was 2007, at 17.3 C (63.1 F), and the warmest was 2000, at 19.0 C (66.2 F). The strongest colour marks a difference of 1.0 C (1.8 F). 1959: 17.7 C, -0.3 C from the station mean1960: 17.5 C, -0.5 C from the station mean1962: 18.3 C, +0.3 C from the station mean1963: 18.8 C, +0.7 C from the station mean1964: 18.3 C, +0.3 C from the station mean1965: 18.3 C, +0.3 C from the station mean1967: 18.1 C, +0.1 C from the station mean1968: 17.4 C, -0.6 C from the station mean1971: 18.6 C, +0.6 C from the station mean1975: 17.6 C, -0.4 C from the station mean1976: 17.5 C, -0.5 C from the station mean1981: 18.6 C, +0.6 C from the station mean1983: 17.4 C, -0.7 C from the station mean1984: 18.8 C, +0.7 C from the station mean1987: 17.7 C, -0.4 C from the station mean1988: 18.0 C, 0.0 C from the station mean1990: 18.3 C, +0.3 C from the station mean1993: 17.3 C, -0.7 C from the station mean1994: 18.1 C, 0.0 C from the station mean1996: 18.3 C, +0.2 C from the station mean1997: 17.7 C, -0.3 C from the station mean2000: 19.0 C, +1.0 C from the station mean2001: 18.4 C, +0.4 C from the station mean2003: 18.9 C, +0.9 C from the station mean2007: 17.3 C, -0.8 C from the station mean2008: 17.7 C, -0.3 C from the station mean2010: 17.3 C, -0.8 C from the station mean19591965197019751980198519901995200020052010
One stripe for each of 27 complete years at Olney, 1959 to 2010. Blue stripes are years cooler than the station's own mean of 18.0 C (64.5 F); red stripes are warmer. The coolest year was 2007, at 17.3 C (63.1 F), and the warmest was 2000, at 19.0 C (66.2 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Olney as warming stripes, 1959 to 2010
YearAnnual mean temperatureDifference from the station mean
195917.7 C-0.33 C
196017.5 C-0.53 C
196218.3 C+0.26 C
196318.8 C+0.72 C
196418.3 C+0.29 C
196518.3 C+0.26 C
196718.1 C+0.05 C
196817.4 C-0.61 C
197118.6 C+0.60 C
197517.6 C-0.40 C
197617.5 C-0.50 C
198118.6 C+0.57 C
198317.4 C-0.67 C
198418.8 C+0.73 C
198717.7 C-0.36 C
198818.0 C-0.02 C
199018.3 C+0.30 C
199317.3 C-0.75 C
199418.1 C+0.04 C
199618.3 C+0.21 C
199717.7 C-0.31 C
200019.0 C+0.96 C
200118.4 C+0.37 C
200318.9 C+0.88 C
200717.3 C-0.79 C
200817.7 C-0.31 C
201017.3 C-0.76 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 2011
Yearly extremes at Olney: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.7 C (116.1 F)197841.7 C (107.1 F)56
Coldest night (TNn)-21.7 C (-7.1 F)1989-11.7 C (10.9 F)56
Wettest day (Rx1day)222.0 mm (8.7 in)200476.5 mm (3.0 in)56
Wettest five days (Rx5day)249.7 mm (9.8 in)2004106.5 mm (4.2 in)56
Longest dry spell (CDD)63 days197632 days56

Hottest day (TXx)

Hottest day (TXx) at Olney by year The hottest day of the year at Olney, 1956 to 2011. The record is 46.7 C (116.1 F) in 1978, marked on the chart; the median year is 41.7 C (107.1 F). 3035404550196019701980199020002010Record: 46.7 C (116.1 F) in 1978
The hottest day of the year at Olney, 1956 to 2011. The record is 46.7 C (116.1 F) in 1978, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Olney by year
YearHottest day (TXx)
195642.8 C (109.0 F)
195740.0 C (104.0 F)
195840.6 C (105.1 F)
195940.6 C (105.1 F)
196042.8 C (109.0 F)
196138.3 C (100.9 F)
196241.7 C (107.1 F)
196340.0 C (104.0 F)
196443.9 C (111.0 F)
196539.4 C (102.9 F)
196640.6 C (105.1 F)
196742.2 C (108.0 F)
196838.9 C (102.0 F)
196942.8 C (109.0 F)
197041.1 C (106.0 F)
197141.7 C (107.1 F)
197242.8 C (109.0 F)
197339.4 C (102.9 F)
197443.3 C (109.9 F)
197538.9 C (102.0 F)
197639.4 C (102.9 F)
197743.3 C (109.9 F)
197846.7 C (116.1 F)
197939.4 C (102.9 F)
198045.6 C (114.1 F)
198141.1 C (106.0 F)
198240.6 C (105.1 F)
198343.9 C (111.0 F)
198443.9 C (111.0 F)
198542.2 C (108.0 F)
198643.9 C (111.0 F)
198740.6 C (105.1 F)
198842.2 C (108.0 F)
198941.7 C (107.1 F)
199040.0 C (104.0 F)
199140.0 C (104.0 F)
199236.7 C (98.1 F)
199340.6 C (105.1 F)
199442.8 C (109.0 F)
199543.9 C (111.0 F)
199643.3 C (109.9 F)
199739.4 C (102.9 F)
199842.8 C (109.0 F)
199941.7 C (107.1 F)
200043.9 C (111.0 F)
200142.8 C (109.0 F)
200241.1 C (106.0 F)
200343.9 C (111.0 F)
200440.0 C (104.0 F)
200532.8 C (91.0 F)
200638.3 C (100.9 F)
200738.3 C (100.9 F)
200842.8 C (109.0 F)
200942.2 C (108.0 F)
201041.7 C (107.1 F)
201144.4 C (111.9 F)

Coldest night (TNn)

Coldest night (TNn) at Olney by year The coldest night of the year at Olney, 1956 to 2011. The record is -21.7 C (-7.1 F) in 1989, marked on the chart; the median year is -11.7 C (10.9 F). -25-20-15-10-5196019701980199020002010Record: -21.7 C (-7.1 F) in 1989
The coldest night of the year at Olney, 1956 to 2011. The record is -21.7 C (-7.1 F) in 1989, marked on the chart; the median year is -11.7 C (10.9 F).
Coldest night (TNn) at Olney by year
YearColdest night (TNn)
1956-13.3 C (8.1 F)
1957-9.4 C (15.1 F)
1958-12.2 C (10.0 F)
1959-15.0 C (5.0 F)
1960-13.3 C (8.1 F)
1961-11.7 C (10.9 F)
1962-16.1 C (3.0 F)
1963-15.0 C (5.0 F)
1964-13.3 C (8.1 F)
1965-11.7 C (10.9 F)
1966-20.6 C (-5.1 F)
1967-10.0 C (14.0 F)
1968-13.3 C (8.1 F)
1969-9.4 C (15.1 F)
1970-10.6 C (12.9 F)
1971-14.4 C (6.1 F)
1972-13.3 C (8.1 F)
1973-8.9 C (16.0 F)
1974-12.2 C (10.0 F)
1975-11.1 C (12.0 F)
1976-13.9 C (7.0 F)
1977-15.0 C (5.0 F)
1978-14.4 C (6.1 F)
1979-13.9 C (7.0 F)
1980-13.9 C (7.0 F)
1981-8.9 C (16.0 F)
1982-16.1 C (3.0 F)
1983-17.8 C (0.0 F)
1984-15.0 C (5.0 F)
1985-21.1 C (-6.0 F)
1986-11.7 C (10.9 F)
1987-9.4 C (15.1 F)
1988-11.7 C (10.9 F)
1989-21.7 C (-7.1 F)
1990-14.4 C (6.1 F)
1991-7.2 C (19.0 F)
1992-9.4 C (15.1 F)
1993-8.9 C (16.0 F)
1994-10.6 C (12.9 F)
1995-10.0 C (14.0 F)
1996-15.6 C (3.9 F)
1997-10.6 C (12.9 F)
1998-10.6 C (12.9 F)
1999-10.0 C (14.0 F)
2000-7.8 C (18.0 F)
2001-7.2 C (19.0 F)
2002-11.1 C (12.0 F)
2003-10.0 C (14.0 F)
2004-11.7 C (10.9 F)
2005-7.2 C (19.0 F)
2006-8.3 C (17.1 F)
2007-10.0 C (14.0 F)
2008-10.0 C (14.0 F)
2009-10.6 C (12.9 F)
2010-12.2 C (10.0 F)
2011-13.9 C (7.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Olney by year The wettest day of the year at Olney, 1956 to 2011. The record is 222.0 mm (8.7 in) in 2004, marked on the chart; the median year is 76.5 mm (3.0 in). 0100200300196019701980199020002010Record: 222.0 mm (8.7 in) in 2004
The wettest day of the year at Olney, 1956 to 2011. The record is 222.0 mm (8.7 in) in 2004, marked on the chart; the median year is 76.5 mm (3.0 in).
Wettest day (Rx1day) at Olney by year
YearWettest day (Rx1day)
195639.9 mm (1.6 in)
195760.2 mm (2.4 in)
195885.3 mm (3.4 in)
1959117.1 mm (4.6 in)
196083.3 mm (3.3 in)
196189.7 mm (3.5 in)
196264.3 mm (2.5 in)
196395.3 mm (3.8 in)
196467.3 mm (2.6 in)
196556.4 mm (2.2 in)
1966100.1 mm (3.9 in)
196771.9 mm (2.8 in)
196873.7 mm (2.9 in)
196978.7 mm (3.1 in)
197089.4 mm (3.5 in)
197171.6 mm (2.8 in)
1972130.8 mm (5.1 in)
197339.4 mm (1.6 in)
197481.3 mm (3.2 in)
197574.4 mm (2.9 in)
197664.3 mm (2.5 in)
197753.3 mm (2.1 in)
197854.9 mm (2.2 in)
197988.9 mm (3.5 in)
1980118.6 mm (4.7 in)
198176.2 mm (3.0 in)
198269.6 mm (2.7 in)
1983157.5 mm (6.2 in)
198478.7 mm (3.1 in)
198580.0 mm (3.1 in)
198676.7 mm (3.0 in)
198777.5 mm (3.1 in)
198857.4 mm (2.3 in)
1989216.9 mm (8.5 in)
1990102.6 mm (4.0 in)
199159.7 mm (2.4 in)
199246.7 mm (1.8 in)
199358.2 mm (2.3 in)
199488.1 mm (3.5 in)
199550.8 mm (2.0 in)
199658.7 mm (2.3 in)
199761.0 mm (2.4 in)
199884.6 mm (3.3 in)
199968.6 mm (2.7 in)
2000100.6 mm (4.0 in)
200169.9 mm (2.8 in)
200251.6 mm (2.0 in)
200391.7 mm (3.6 in)
2004222.0 mm (8.7 in)
200578.7 mm (3.1 in)
200649.0 mm (1.9 in)
200788.9 mm (3.5 in)
200883.8 mm (3.3 in)
200963.8 mm (2.5 in)
201086.4 mm (3.4 in)
201117.8 mm (0.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Olney by year The wettest five days of the year at Olney, 1956 to 2011. The record is 249.7 mm (9.8 in) in 2004, marked on the chart; the median year is 106.5 mm (4.2 in). 0100200300196019701980199020002010Record: 249.7 mm (9.8 in) in 2004
The wettest five days of the year at Olney, 1956 to 2011. The record is 249.7 mm (9.8 in) in 2004, marked on the chart; the median year is 106.5 mm (4.2 in).
Wettest five days (Rx5day) at Olney by year
YearWettest five days (Rx5day)
195689.7 mm (3.5 in)
1957142.7 mm (5.6 in)
195893.9 mm (3.7 in)
1959139.5 mm (5.5 in)
196089.4 mm (3.5 in)
196189.7 mm (3.5 in)
1962138.4 mm (5.4 in)
1963122.7 mm (4.8 in)
1964115.5 mm (4.5 in)
196564.1 mm (2.5 in)
1966164.5 mm (6.5 in)
196774.7 mm (2.9 in)
1968109.7 mm (4.3 in)
1969109.9 mm (4.3 in)
1970115.2 mm (4.5 in)
1971119.1 mm (4.7 in)
1972132.3 mm (5.2 in)
197379.3 mm (3.1 in)
1974119.7 mm (4.7 in)
1975101.1 mm (4.0 in)
197670.8 mm (2.8 in)
197784.8 mm (3.3 in)
197885.7 mm (3.4 in)
197997.6 mm (3.8 in)
1980196.8 mm (7.7 in)
1981124.8 mm (4.9 in)
1982104.9 mm (4.1 in)
1983160.8 mm (6.3 in)
1984133.6 mm (5.3 in)
1985107.7 mm (4.2 in)
1986149.1 mm (5.9 in)
198784.1 mm (3.3 in)
198857.9 mm (2.3 in)
1989224.8 mm (8.9 in)
1990120.1 mm (4.7 in)
1991105.3 mm (4.1 in)
1992100.4 mm (4.0 in)
199398.6 mm (3.9 in)
1994118.7 mm (4.7 in)
1995145.6 mm (5.7 in)
1996101.2 mm (4.0 in)
199797.3 mm (3.8 in)
199886.7 mm (3.4 in)
199994.3 mm (3.7 in)
2000108.8 mm (4.3 in)
200178.8 mm (3.1 in)
200265.9 mm (2.6 in)
2003118.9 mm (4.7 in)
2004249.7 mm (9.8 in)
200583.0 mm (3.3 in)
200669.6 mm (2.7 in)
2007162.8 mm (6.4 in)
200885.1 mm (3.4 in)
2009132.6 mm (5.2 in)
2010174.0 mm (6.9 in)
201133.3 mm (1.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Olney by year The longest dry spell of the year at Olney, 1956 to 2011. The record is 63 days in 1976, marked on the chart; the median year is 32 days. 20406080196019701980199020002010Record: 63 days in 1976
The longest dry spell of the year at Olney, 1956 to 2011. The record is 63 days in 1976, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Olney by year
YearLongest dry spell (CDD)
195632 days
195734 days
195827 days
195933 days
196039 days
196143 days
196229 days
196337 days
196462 days
196542 days
196627 days
196741 days
196835 days
196945 days
197040 days
197131 days
197241 days
197328 days
197429 days
197523 days
197663 days
197729 days
197843 days
197948 days
198028 days
198139 days
198231 days
198333 days
198430 days
198521 days
198632 days
198725 days
198826 days
198927 days
199028 days
199138 days
199224 days
199322 days
199441 days
199536 days
199659 days
199723 days
199824 days
199933 days
200059 days
200127 days
200228 days
200330 days
200425 days
200527 days
200621 days
200732 days
200843 days
200930 days
201028 days
201152 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 Olney falls on 2 April and the median first autumn frost on 11 November, which leaves a median of 229 days between them.

Fitted over all years, the growing season changes by +1.3 days per decade at this station.

Frost dates and growing season at Olney
MeasureMedian, all yearsEarliest periodRecent period (1959 to 2010)Recent against earliestFitted trend
Last spring frost2 Apriln/a2 Apriln/a-0.5 days per decade
First autumn frost11 Novembern/a11 Novembern/a+0.8 days per decade
Growing days229 daysn/a229 daysn/a+1.3 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.

Rainfall Return Levels

47 years, 1956 to 2010

A day with at least 75.8 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 224.5 mm (8.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Olney: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years75.8 mm (3.0 in)
5 years100.4 mm (4.0 in)
10 years121.4 mm (4.8 in)
25 years155.2 mm (6.1 in)
50 years186.6 mm (7.3 in)Longer than the 47 years of record
100 years224.5 mm (8.8 in)Longer than the 47 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, 47 years of values from 1956 to 2010.

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: 222.0 mm (8.7 in) in 2004; 216.9 mm (8.5 in) in 1989; 157.5 mm (6.2 in) in 1983.

Download the Data

  • Data for Olney standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Olney 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).