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Kaskaskia Rvr Navigation Lock Weather Records (USC00114629)

Record envelope, standing records and threshold days for Kaskaskia Rvr Navigation Lock (USC00114629), Illinois, United States, with 53 years of record.

Key Facts for Kaskaskia Rvr Navigation Lock

  • Kaskaskia Rvr Navigation Lock (USC00114629) is a weather station in Illinois, United States at 37.98 latitude and -89.95 longitude, 119 m (390 ft) above sea level.
  • The station reports from 1974 to 2026, 53 years of record.
  • 1,464 records set at Kaskaskia Rvr Navigation Lock still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Kaskaskia Rvr Navigation Lock set a daily record high minimum temperature of 16.7 C (62.1 F) on 13 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Illinois, United States, 37.98 latitude, -89.95 longitude.
  • Elevation: 119 m (390 ft).
  • Period of record: 1974 to 2026, 53 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

25 days at or beyond a record
Daily record high and record low at Kaskaskia Rvr Navigation Lock, with 2026 drawn through them The band shows the record high and record low for each calendar day at Kaskaskia Rvr Navigation Lock. The lines show the 2026 daily maximum and minimum. 25 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 Kaskaskia Rvr Navigation Lock. The lines show the 2026 daily maximum and minimum. 25 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Kaskaskia Rvr Navigation Lock, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan23.3 C (73.9 F)-27.8 C (-18.0 F)22.2 C (72.0 F)-20.0 C (-4.0 F)
Feb28.9 C (84.0 F)-25.6 C (-14.1 F)24.4 C (75.9 F)-16.1 C (3.0 F)
Mar33.3 C (91.9 F)-20.0 C (-4.0 F)33.3 C (91.9 F)-8.3 C (17.1 F)
Apr37.2 C (99.0 F)-5.6 C (21.9 F)31.1 C (88.0 F)3.9 C (39.0 F)
May36.7 C (98.1 F)-0.6 C (30.9 F)31.1 C (88.0 F)5.0 C (41.0 F)
Jun42.8 C (109.0 F)6.7 C (44.1 F)34.4 C (93.9 F)11.1 C (52.0 F)
Jul42.8 C (109.0 F)10.6 C (51.1 F)37.8 C (100.0 F)17.2 C (63.0 F)
Aug42.8 C (109.0 F)5.0 C (41.0 F)36.1 C (97.0 F)13.3 C (55.9 F)
Sep44.4 C (111.9 F)0.0 C (32.0 F)38.9 C (102.0 F)10.6 C (51.1 F)
Oct35.6 C (96.1 F)-5.0 C (23.0 F)33.9 C (93.0 F)5.0 C (41.0 F)
Nov31.7 C (89.1 F)-13.3 C (8.1 F)n/an/a
Dec25.6 C (78.1 F)-27.8 C (-18.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Kaskaskia Rvr Navigation Lock by the year they were set 1,464 records at Kaskaskia Rvr Navigation Lock still stand. 1989 holds the most, with 69. 0204060801974: 251975: 141976: 461977: 401978: 291979: 341980: 431981: 251982: 341983: 411984: 321985: 351986: 411987: 411988: 451989: 691990: 451991: 491992: 261993: 101995: 111996: 231997: 231998: 411999: 212000: 162001: 192002: 122003: 122004: 202005: 232006: 252007: 222008: 222009: 212010: 262011: 342012: 492013: 272014: 382015: 302016: 232017: 262018: 252019: 182020: 102021: 182022: 102023: 192024: 222025: 252026: 29197419801986199219992005201120172023
1,464 records at Kaskaskia Rvr Navigation Lock still stand. 1989 holds the most, with 69.
Standing records at Kaskaskia Rvr Navigation Lock by the year they were set
Year setStanding records
197425
197514
197646
197740
197829
197934
198043
198125
198234
198341
198432
198535
198641
198741
198845
198969
199045
199149
199226
199310
199511
199623
199723
199841
199921
200016
200119
200212
200312
200420
200523
200625
200722
200822
200921
201026
201134
201249
201327
201438
201530
201623
201726
201825
201918
202010
202118
202210
202319
202422
202525
202629

All-Time Record Progression

1 new records
When Kaskaskia Rvr Navigation Lock set new all-time records 1 all-time records were set at Kaskaskia Rvr Navigation Lock between 25 January 2026 and 25 January 2026. Each dot is a new record. Record daily snowfall25 January 2026: Record daily snowfall 22.9 cm (9.0 in)
1 all-time records were set at Kaskaskia Rvr Navigation Lock between 25 January 2026 and 25 January 2026. Each dot is a new record.
When Kaskaskia Rvr Navigation Lock set new all-time records
DateKindDetail
2026-01-25Record daily snowfallRecord daily snowfall 22.9 cm (9.0 in)

Wettest Day of Each Month

Dec: 205.7 mm (8.1 in)
Record daily precipitation for each month at Kaskaskia Rvr Navigation Lock The wettest day on record for each calendar month at Kaskaskia Rvr Navigation Lock. The most was 205.7 mm (8.1 in) on 28 December 1990. 0100200300 Jan: 95.3 mm (3.8 in), 9 January 1997 Jan Feb: 66.0 mm (2.6 in), 7 February 1999 Feb Mar: 101.6 mm (4.0 in), 19 March 2008 Mar Apr: 111.5 mm (4.4 in), 5 April 2025 Apr May: 90.9 mm (3.6 in), 1 May 1983 May Jun: 99.8 mm (3.9 in), 17 June 2015 Jun Jul: 100.8 mm (4.0 in), 5 July 2007 Jul Aug: 61.5 mm (2.4 in), 29 August 2004 Aug Sep: 93.2 mm (3.7 in), 17 September 2016 Sep Oct: 82.8 mm (3.3 in), 9 October 2009 Oct Nov: 108.2 mm (4.3 in), 5 November 2024 Nov Dec: 205.7 mm (8.1 in), 28 December 1990 Dec
The wettest day on record for each calendar month at Kaskaskia Rvr Navigation Lock. The most was 205.7 mm (8.1 in) on 28 December 1990.
Record daily precipitation for each month at Kaskaskia Rvr Navigation Lock
MonthRecord daily precipitation (mm)Date
Jan95.3 mm (3.8 in)9 January 1997
Feb66.0 mm (2.6 in)7 February 1999
Mar101.6 mm (4.0 in)19 March 2008
Apr111.5 mm (4.4 in)5 April 2025
May90.9 mm (3.6 in)1 May 1983
Jun99.8 mm (3.9 in)17 June 2015
Jul100.8 mm (4.0 in)5 July 2007
Aug61.5 mm (2.4 in)29 August 2004
Sep93.2 mm (3.7 in)17 September 2016
Oct82.8 mm (3.3 in)9 October 2009
Nov108.2 mm (4.3 in)5 November 2024
Dec205.7 mm (8.1 in)28 December 1990

Period of Record Coverage

1974 to 2026
Days with data per year at Kaskaskia Rvr Navigation Lock 52 years of record at Kaskaskia Rvr Navigation Lock, 1974 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1974, 1993, 1995, 2000, 2001, 2002, 2003, 2018 and others. 1974: 275 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 363 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 361 of 366 days1981: 361 of 365 days1982: 354 of 365 days1983: 361 of 365 days1984: 365 of 366 days1985: 356 of 365 days1986: 363 of 365 days1987: 364 of 365 days1988: 365 of 366 days1989: 362 of 365 days1990: 362 of 365 days1991: 363 of 365 days1992: 363 of 366 days1993: 209 of 365 days1995: 214 of 365 days1996: 361 of 366 days1997: 365 of 365 days1998: 363 of 365 days1999: 334 of 365 days2000: 240 of 366 days2001: 272 of 365 days2002: 272 of 365 days2003: 242 of 365 days2004: 331 of 366 days2005: 364 of 365 days2006: 364 of 365 days2007: 362 of 365 days2008: 362 of 366 days2009: 357 of 365 days2010: 365 of 365 days2011: 361 of 365 days2012: 362 of 366 days2013: 362 of 365 days2014: 349 of 365 days2015: 345 of 365 days2016: 349 of 366 days2017: 356 of 365 days2018: 261 of 365 days2019: 307 of 365 days2020: 348 of 366 days2021: 350 of 365 days2022: 262 of 365 days2023: 355 of 365 days2024: 357 of 366 days2025: 358 of 365 days2026: 270 of 365 days19801990200020102020
52 years of record at Kaskaskia Rvr Navigation Lock, 1974 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1974, 1993, 1995, 2000, 2001, 2002, 2003, 2018 and others.
Days with data per year at Kaskaskia Rvr Navigation Lock
YearDays with dataShare of yearComplete
197427575%No
1975365100%Yes
1976366100%Yes
197736399%Yes
1978365100%Yes
1979364100%Yes
198036199%Yes
198136199%Yes
198235497%Yes
198336199%Yes
1984365100%Yes
198535698%Yes
198636399%Yes
1987364100%Yes
1988365100%Yes
198936299%Yes
199036299%Yes
199136399%Yes
199236399%Yes
199320957%No
199521459%No
199636199%Yes
1997365100%Yes
199836399%Yes
199933492%Yes
200024066%No
200127275%No
200227275%No
200324266%No
200433190%Yes
2005364100%Yes
2006364100%Yes
200736299%Yes
200836299%Yes
200935798%Yes
2010365100%Yes
201136199%Yes
201236299%Yes
201336299%Yes
201434996%Yes
201534595%Yes
201634995%Yes
201735698%Yes
201826172%No
201930784%No
202034895%Yes
202135096%Yes
202226272%No
202335597%Yes
202435798%Yes
202535898%Yes
202627074%No

Latest Records

20
Latest records at Kaskaskia Rvr Navigation Lock
DateStationRecordValueBeat old record byOld record stoodSignificance
13 October 2026Kaskaskia Rvr Navigation Lock, USdaily high min (Provisional)16.7 C (62.1 F)0.6 C (1.1 F)40 years18 of 100 (Routine)
13 October 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Provisional)33.9 C (93.0 F)2.8 C (5.0 F)1 year9 of 100 (Routine)
10 October 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Provisional)31.7 C (89.1 F)1.1 C (2.0 F)16 years10 of 100 (Routine)
8 October 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Tie, Provisional)32.8 C (91.0 F)tie19 years2 of 100 (Routine)
1 October 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Tie, Provisional)33.9 C (93.0 F)tie7 years1 of 100 (Routine)
20 September 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Provisional)37.2 C (99.0 F)2.8 C (5.0 F)48 years24 of 100 (Routine)
19 September 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Provisional)36.1 C (97.0 F)1.7 C (3.1 F)0 years8 of 100 (Routine)
18 September 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Provisional)36.7 C (98.1 F)2.8 C (5.0 F)48 years24 of 100 (Routine)
18 September 2026Kaskaskia Rvr Navigation Lock, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie48 years4 of 100 (Routine)
17 September 2026Kaskaskia Rvr Navigation Lock, USdaily high min (Provisional)23.3 C (73.9 F)1.6 C (2.9 F)48 years22 of 100 (Routine)
17 September 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Provisional)36.7 C (98.1 F)1.7 C (3.1 F)7 years10 of 100 (Routine)
16 September 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Provisional)37.2 C (99.0 F)2.2 C (4.0 F)35 years19 of 100 (Routine)
16 September 2026Kaskaskia Rvr Navigation Lock, USdaily high min (Tie, Provisional)22.2 C (72.0 F)tie35 years3 of 100 (Routine)
9 September 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Tie, Provisional)35.0 C (95.0 F)tie45 years4 of 100 (Routine)
6 September 2026Kaskaskia Rvr Navigation Lock, USdaily high min (Provisional)23.3 C (73.9 F)1.1 C (2.0 F)13 years11 of 100 (Routine)
5 September 2026Kaskaskia Rvr Navigation Lock, USdaily high min (Provisional)23.3 C (73.9 F)0.5 C (0.9 F)8 years8 of 100 (Routine)
4 September 2026Kaskaskia Rvr Navigation Lock, USmonthly high min (Tie, Provisional)23.9 C (75.0 F)tie13 years4 of 100 (Routine)
3 September 2026Kaskaskia Rvr Navigation Lock, USdaily high max (Tie, Provisional)37.8 C (100.0 F)tie15 years2 of 100 (Routine)
3 September 2026Kaskaskia Rvr Navigation Lock, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie17 years2 of 100 (Routine)
2 September 2026Kaskaskia Rvr Navigation Lock, USmonthly high min (Tie, Provisional)23.9 C (75.0 F)tie13 years4 of 100 (Routine)

Climate Trend

39 complete years, 1975 to 2025
Annual mean temperature at Kaskaskia Rvr Navigation Lock as warming stripes, 1975 to 2025 One stripe for each of 39 complete years at Kaskaskia Rvr Navigation Lock, 1975 to 2025. Blue stripes are years cooler than the station's own mean of 13.5 C (56.4 F); red stripes are warmer. The coolest year was 1979, at 11.6 C (52.9 F), and the warmest was 1998, at 15.9 C (60.7 F). The strongest colour marks a difference of 2.4 C (4.3 F). 1975: 13.2 C, -0.3 C from the station mean1976: 12.5 C, -1.1 C from the station mean1977: 12.6 C, -0.9 C from the station mean1978: 11.8 C, -1.7 C from the station mean1979: 11.6 C, -1.9 C from the station mean1980: 12.8 C, -0.7 C from the station mean1981: 13.1 C, -0.4 C from the station mean1982: 12.7 C, -0.9 C from the station mean1983: 13.2 C, -0.4 C from the station mean1984: 13.1 C, -0.4 C from the station mean1985: 12.6 C, -1.0 C from the station mean1986: 13.9 C, +0.3 C from the station mean1987: 14.1 C, +0.6 C from the station mean1988: 12.8 C, -0.7 C from the station mean1989: 12.3 C, -1.2 C from the station mean1990: 13.8 C, +0.3 C from the station mean1991: 14.2 C, +0.6 C from the station mean1992: 13.1 C, -0.5 C from the station mean1996: 13.1 C, -0.5 C from the station mean1997: 13.9 C, +0.3 C from the station mean1998: 15.9 C, +2.4 C from the station mean2005: 14.3 C, +0.8 C from the station mean2006: 14.3 C, +0.7 C from the station mean2007: 14.3 C, +0.7 C from the station mean2008: 12.6 C, -1.0 C from the station mean2009: 13.2 C, -0.4 C from the station mean2010: 13.9 C, +0.3 C from the station mean2011: 14.3 C, +0.7 C from the station mean2012: 15.2 C, +1.7 C from the station mean2013: 12.9 C, -0.6 C from the station mean2014: 12.3 C, -1.2 C from the station mean2015: 14.3 C, +0.7 C from the station mean2016: 15.0 C, +1.4 C from the station mean2017: 15.0 C, +1.4 C from the station mean2020: 13.6 C, +0.1 C from the station mean2021: 13.9 C, +0.4 C from the station mean2023: 14.3 C, +0.8 C from the station mean2024: 14.8 C, +1.2 C from the station mean2025: 14.0 C, +0.4 C from the station mean19751980198519901995200020052010201520202025
One stripe for each of 39 complete years at Kaskaskia Rvr Navigation Lock, 1975 to 2025. Blue stripes are years cooler than the station's own mean of 13.5 C (56.4 F); red stripes are warmer. The coolest year was 1979, at 11.6 C (52.9 F), and the warmest was 1998, at 15.9 C (60.7 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Kaskaskia Rvr Navigation Lock as warming stripes, 1975 to 2025
YearAnnual mean temperatureDifference from the station mean
197513.2 C-0.30 C
197612.5 C-1.08 C
197712.6 C-0.92 C
197811.8 C-1.70 C
197911.6 C-1.91 C
198012.8 C-0.72 C
198113.1 C-0.40 C
198212.7 C-0.89 C
198313.2 C-0.38 C
198413.1 C-0.44 C
198512.6 C-0.97 C
198613.9 C+0.32 C
198714.1 C+0.57 C
198812.8 C-0.74 C
198912.3 C-1.20 C
199013.8 C+0.28 C
199114.2 C+0.64 C
199213.1 C-0.45 C
199613.1 C-0.46 C
199713.9 C+0.31 C
199815.9 C+2.40 C
200514.3 C+0.77 C
200614.3 C+0.75 C
200714.3 C+0.74 C
200812.6 C-0.98 C
200913.2 C-0.38 C
201013.9 C+0.31 C
201114.3 C+0.74 C
201215.2 C+1.69 C
201312.9 C-0.64 C
201412.3 C-1.22 C
201514.3 C+0.72 C
201615.0 C+1.43 C
201715.0 C+1.43 C
202013.6 C+0.07 C
202113.9 C+0.39 C
202314.3 C+0.77 C
202414.8 C+1.21 C
202514.0 C+0.43 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.5) per decade over 1975 to 2025. In Fahrenheit: 0.6 F (0.3 to 0.9) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Kaskaskia Rvr Navigation Lock
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.2 to 0.5) per decade0.6 F (0.3 to 0.9) per decade1975 to 202539Rise
Mean daily maximum0.20 C (-0.02 to 0.43) per decade0.37 F (-0.04 to 0.77) per decade1975 to 202539Not clearly different from zero
Mean daily minimum0.5 C (0.3 to 0.7) per decade0.9 F (0.6 to 1.2) per decade1975 to 202539Rise

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

1974 to 2026
Yearly extremes at Kaskaskia Rvr Navigation Lock: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)199038.3 C (100.9 F)52
Coldest night (TNn)-27.8 C (-18.0 F)1985-17.8 C (0.0 F)52
Wettest day (Rx1day)205.7 mm (8.1 in)199075.2 mm (3.0 in)52
Wettest five days (Rx5day)277.3 mm (10.9 in)1990107.7 mm (4.2 in)52
Longest dry spell (CDD)38 days201722 days52

Hottest day (TXx)

Hottest day (TXx) at Kaskaskia Rvr Navigation Lock by year The hottest day of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 44.4 C (111.9 F) in 1990, marked on the chart; the median year is 38.3 C (100.9 F). 3537.54042.54519801990200020102020Record: 44.4 C (111.9 F) in 1990
The hottest day of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 44.4 C (111.9 F) in 1990, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Kaskaskia Rvr Navigation Lock by year
YearHottest day (TXx)
197438.9 C (102.0 F)
197536.7 C (98.1 F)
197638.3 C (100.9 F)
197736.7 C (98.1 F)
197837.8 C (100.0 F)
197937.2 C (99.0 F)
198042.2 C (108.0 F)
198136.7 C (98.1 F)
198237.8 C (100.0 F)
198342.2 C (108.0 F)
198439.4 C (102.9 F)
198540.6 C (105.1 F)
198640.0 C (104.0 F)
198742.8 C (109.0 F)
198842.8 C (109.0 F)
198939.4 C (102.9 F)
199044.4 C (111.9 F)
199140.0 C (104.0 F)
199236.1 C (97.0 F)
199336.1 C (97.0 F)
199539.4 C (102.9 F)
199638.9 C (102.0 F)
199741.1 C (106.0 F)
199840.6 C (105.1 F)
199938.9 C (102.0 F)
200035.0 C (95.0 F)
200138.9 C (102.0 F)
200238.3 C (100.9 F)
200338.3 C (100.9 F)
200438.3 C (100.9 F)
200537.8 C (100.0 F)
200638.9 C (102.0 F)
200740.0 C (104.0 F)
200836.7 C (98.1 F)
200937.2 C (99.0 F)
201040.0 C (104.0 F)
201138.9 C (102.0 F)
201242.8 C (109.0 F)
201338.3 C (100.9 F)
201437.2 C (99.0 F)
201536.7 C (98.1 F)
201638.3 C (100.9 F)
201737.8 C (100.0 F)
201835.6 C (96.1 F)
201935.6 C (96.1 F)
202035.0 C (95.0 F)
202135.0 C (95.0 F)
202236.7 C (98.1 F)
202338.3 C (100.9 F)
202437.8 C (100.0 F)
202536.1 C (97.0 F)
202638.9 C (102.0 F)

Coldest night (TNn)

Coldest night (TNn) at Kaskaskia Rvr Navigation Lock by year The coldest night of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is -27.8 C (-18.0 F) in 1985, marked on the chart; the median year is -17.8 C (0.0 F). -30-25-20-15-1019801990200020102020Record: -27.8 C (-18.0 F) in 1985
The coldest night of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is -27.8 C (-18.0 F) in 1985, marked on the chart; the median year is -17.8 C (0.0 F).
Coldest night (TNn) at Kaskaskia Rvr Navigation Lock by year
YearColdest night (TNn)
1974-10.0 C (14.0 F)
1975-15.0 C (5.0 F)
1976-21.1 C (-6.0 F)
1977-26.1 C (-15.0 F)
1978-21.1 C (-6.0 F)
1979-23.9 C (-11.0 F)
1980-18.9 C (-2.0 F)
1981-18.9 C (-2.0 F)
1982-23.3 C (-9.9 F)
1983-25.0 C (-13.0 F)
1984-23.9 C (-11.0 F)
1985-27.8 C (-18.0 F)
1986-20.0 C (-4.0 F)
1987-14.4 C (6.1 F)
1988-19.4 C (-2.9 F)
1989-27.8 C (-18.0 F)
1990-18.9 C (-2.0 F)
1991-17.8 C (0.0 F)
1992-15.0 C (5.0 F)
1993-20.0 C (-4.0 F)
1995-17.8 C (0.0 F)
1996-23.3 C (-9.9 F)
1997-18.9 C (-2.0 F)
1998-13.3 C (8.1 F)
1999-17.2 C (1.0 F)
2000-17.2 C (1.0 F)
2001-12.2 C (10.0 F)
2002-13.3 C (8.1 F)
2003-14.4 C (6.1 F)
2004-18.9 C (-2.0 F)
2005-16.7 C (1.9 F)
2006-15.0 C (5.0 F)
2007-14.4 C (6.1 F)
2008-17.8 C (0.0 F)
2009-17.8 C (0.0 F)
2010-15.6 C (3.9 F)
2011-15.0 C (5.0 F)
2012-10.0 C (14.0 F)
2013-15.0 C (5.0 F)
2014-21.1 C (-6.0 F)
2015-21.1 C (-6.0 F)
2016-15.0 C (5.0 F)
2017-17.2 C (1.0 F)
2018-19.4 C (-2.9 F)
2019-17.2 C (1.0 F)
2020-13.3 C (8.1 F)
2021-20.0 C (-4.0 F)
2022-15.0 C (5.0 F)
2023-10.0 C (14.0 F)
2024-20.0 C (-4.0 F)
2025-18.3 C (-0.9 F)
2026-20.0 C (-4.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Kaskaskia Rvr Navigation Lock by year The wettest day of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 205.7 mm (8.1 in) in 1990, marked on the chart; the median year is 75.2 mm (3.0 in). 05010015020025019801990200020102020Record: 205.7 mm (8.1 in) in 1990
The wettest day of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 205.7 mm (8.1 in) in 1990, marked on the chart; the median year is 75.2 mm (3.0 in).
Wettest day (Rx1day) at Kaskaskia Rvr Navigation Lock by year
YearWettest day (Rx1day)
197452.1 mm (2.1 in)
197579.2 mm (3.1 in)
197649.0 mm (1.9 in)
197781.8 mm (3.2 in)
197850.8 mm (2.0 in)
197997.0 mm (3.8 in)
198061.0 mm (2.4 in)
198156.1 mm (2.2 in)
198274.9 mm (2.9 in)
198390.9 mm (3.6 in)
198479.8 mm (3.1 in)
198581.0 mm (3.2 in)
198673.7 mm (2.9 in)
198750.8 mm (2.0 in)
198852.1 mm (2.1 in)
198969.1 mm (2.7 in)
1990205.7 mm (8.1 in)
199142.4 mm (1.7 in)
199266.5 mm (2.6 in)
199375.4 mm (3.0 in)
199597.8 mm (3.9 in)
199676.2 mm (3.0 in)
199795.3 mm (3.8 in)
199855.4 mm (2.2 in)
199966.0 mm (2.6 in)
200097.8 mm (3.9 in)
200155.9 mm (2.2 in)
200283.8 mm (3.3 in)
200356.6 mm (2.2 in)
200463.5 mm (2.5 in)
200571.1 mm (2.8 in)
200650.5 mm (2.0 in)
2007100.8 mm (4.0 in)
2008101.6 mm (4.0 in)
200991.9 mm (3.6 in)
201081.3 mm (3.2 in)
201173.7 mm (2.9 in)
201250.8 mm (2.0 in)
201368.1 mm (2.7 in)
201482.6 mm (3.3 in)
201599.8 mm (3.9 in)
201693.2 mm (3.7 in)
201799.6 mm (3.9 in)
201888.9 mm (3.5 in)
201975.2 mm (3.0 in)
202075.2 mm (3.0 in)
202177.5 mm (3.1 in)
202255.9 mm (2.2 in)
202358.4 mm (2.3 in)
2024108.2 mm (4.3 in)
2025111.5 mm (4.4 in)
202663.5 mm (2.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Kaskaskia Rvr Navigation Lock by year The wettest five days of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 277.3 mm (10.9 in) in 1990, marked on the chart; the median year is 107.7 mm (4.2 in). 010020030019801990200020102020Record: 277.3 mm (10.9 in) in 1990
The wettest five days of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 277.3 mm (10.9 in) in 1990, marked on the chart; the median year is 107.7 mm (4.2 in).
Wettest five days (Rx5day) at Kaskaskia Rvr Navigation Lock by year
YearWettest five days (Rx5day)
197461.0 mm (2.4 in)
197582.2 mm (3.2 in)
197679.5 mm (3.1 in)
1977105.9 mm (4.2 in)
197894.5 mm (3.7 in)
1979136.7 mm (5.4 in)
1980105.2 mm (4.1 in)
1981101.2 mm (4.0 in)
1982130.8 mm (5.1 in)
1983161.3 mm (6.4 in)
1984133.8 mm (5.3 in)
1985153.3 mm (6.0 in)
1986123.4 mm (4.9 in)
198785.1 mm (3.4 in)
198893.3 mm (3.7 in)
198986.9 mm (3.4 in)
1990277.3 mm (10.9 in)
1991277.3 mm (10.9 in)
199296.2 mm (3.8 in)
199386.6 mm (3.4 in)
1995113.1 mm (4.5 in)
199686.1 mm (3.4 in)
1997152.5 mm (6.0 in)
199875.5 mm (3.0 in)
199975.0 mm (3.0 in)
2000150.6 mm (5.9 in)
200181.5 mm (3.2 in)
2002105.4 mm (4.1 in)
2003107.4 mm (4.2 in)
2004109.7 mm (4.3 in)
200587.6 mm (3.4 in)
2006101.1 mm (4.0 in)
2007120.4 mm (4.7 in)
2008137.7 mm (5.4 in)
2009110.4 mm (4.3 in)
201082.3 mm (3.2 in)
2011188.0 mm (7.4 in)
201251.1 mm (2.0 in)
2013108.0 mm (4.3 in)
201492.3 mm (3.6 in)
2015265.2 mm (10.4 in)
2016138.4 mm (5.4 in)
2017254.0 mm (10.0 in)
2018148.2 mm (5.8 in)
201991.2 mm (3.6 in)
202093.2 mm (3.7 in)
2021108.0 mm (4.3 in)
202270.6 mm (2.8 in)
2023108.0 mm (4.3 in)
2024180.3 mm (7.1 in)
2025197.6 mm (7.8 in)
2026126.0 mm (5.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Kaskaskia Rvr Navigation Lock by year The longest dry spell of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 38 days in 2017, marked on the chart; the median year is 22 days. 1020304019801990200020102020Record: 38 days in 2017
The longest dry spell of the year at Kaskaskia Rvr Navigation Lock, 1974 to 2026. The record is 38 days in 2017, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Kaskaskia Rvr Navigation Lock by year
YearLongest dry spell (CDD)
197427 days
197516 days
197625 days
197718 days
197823 days
197924 days
198024 days
198120 days
198217 days
198327 days
198414 days
198526 days
198623 days
198718 days
198825 days
198922 days
199021 days
199122 days
199228 days
199317 days
199526 days
199621 days
199718 days
199827 days
199935 days
200016 days
200129 days
200227 days
200327 days
200424 days
200523 days
200616 days
200718 days
200822 days
200916 days
201026 days
201125 days
201217 days
201326 days
201417 days
201518 days
201622 days
201738 days
201815 days
201913 days
202017 days
202113 days
202217 days
202322 days
202430 days
202522 days
202620 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

39 years with a frost

Across 39 years with a frost, the median last spring frost at Kaskaskia Rvr Navigation Lock falls on 10 April and the median first autumn frost on 25 October, which leaves a median of 195 days between them.

Fitted over all years, the growing season changes by +6.2 days per decade at this station.

Frost dates and growing season at Kaskaskia Rvr Navigation Lock
MeasureMedian, all yearsEarliest periodRecent period (1984 to 2025)Recent against earliestFitted trend
Last spring frost10 Apriln/a8 Apriln/a-2.6 days per decade
First autumn frost25 Octobern/a28 Octobern/a+3.6 days per decade
Growing days195 daysn/a196 daysn/a+6.2 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.

Rainfall Return Levels

43 years, 1975 to 2025

A day with at least 74.1 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 158.2 mm (6.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Kaskaskia Rvr Navigation Lock: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years74.1 mm (2.9 in)
5 years95.4 mm (3.8 in)
10 years110.0 mm (4.3 in)
25 years129.0 mm (5.1 in)
50 years143.5 mm (5.6 in)Longer than the 43 years of record
100 years158.2 mm (6.2 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 1975 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: 205.7 mm (8.1 in) in 1990; 111.5 mm (4.4 in) in 2025; 108.2 mm (4.3 in) in 2024.

Climate Twins

2008 to 2025 against 1961 to 1990

Over 2008 to 2025, Kaskaskia Rvr Navigation Lock had a mean temperature of 13.9 C (57.1 F) and 1,101.7 mm (43.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Harrisburg (United States, 128 km away), Fords Ferry Dam 5O (United States, 172 km away) and Evansville Museum (United States, 208 km away).

Climate twins of Kaskaskia Rvr Navigation Lock: stations whose 1961 to 1990 climate is closest to its 2008 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
HarrisburgUnited States128 km (80 mi)14.0 C (57.2 F)1,145.8 mm (45.1 in)0.45
Fords Ferry Dam 5OUnited States172 km (107 mi)13.7 C (56.6 F)1,120.3 mm (44.1 in)0.46
Evansville MuseumUnited States208 km (129 mi)14.0 C (57.3 F)1,161.7 mm (45.7 in)0.47

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Kaskaskia Rvr Navigation Lock standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Kaskaskia Rvr Navigation Lock 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).