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Joliet Weather Records (USW00014834)

Record envelope, standing records and threshold days for Joliet (USW00014834), Illinois, United States, with 134 years of record.

Key Facts for Joliet

  • Joliet (USW00014834) is a weather station in Illinois, United States at 41.55 latitude and -88.08 longitude, 168 m (551 ft) above sea level.
  • The station reports from 1893 to 2026, 134 years of record.
  • 1,464 records set at Joliet still stand.
  • Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
  • Joliet set a daily record high maximum temperature of 32.0 C (89.6 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: Illinois, United States, 41.55 latitude, -88.08 longitude.
  • Elevation: 168 m (551 ft).
  • Period of record: 1893 to 2026, 134 years.
  • Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

17 days at or beyond a record
Daily record high and record low at Joliet, with 2026 drawn through them The band shows the record high and record low for each calendar day at Joliet. The lines show the 2026 daily maximum and minimum. 17 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 Joliet. The lines show the 2026 daily maximum and minimum. 17 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Joliet, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan19.4 C (66.9 F)-28.9 C (-20.0 F)16.3 C (61.3 F)-21.1 C (-6.0 F)
Feb20.6 C (69.1 F)-28.9 C (-20.0 F)20.2 C (68.4 F)-16.5 C (2.3 F)
Mar28.4 C (83.1 F)-22.2 C (-8.0 F)28.4 C (83.1 F)-9.0 C (15.8 F)
Apr32.2 C (90.0 F)-10.0 C (14.0 F)28.6 C (83.5 F)-1.2 C (29.8 F)
May35.0 C (95.0 F)-3.3 C (26.1 F)30.7 C (87.3 F)-0.8 C (30.6 F)
Jun38.9 C (102.0 F)1.7 C (35.1 F)34.2 C (93.6 F)8.7 C (47.7 F)
Jul39.4 C (102.9 F)6.7 C (44.1 F)26.1 C (79.0 F)20.6 C (69.1 F)
Aug38.3 C (100.9 F)5.0 C (41.0 F)n/an/a
Sep38.3 C (100.9 F)-2.2 C (28.0 F)n/an/a
Oct35.6 C (96.1 F)-9.4 C (15.1 F)32.0 C (89.6 F)10.1 C (50.2 F)
Nov27.2 C (81.0 F)-23.3 C (-9.9 F)n/an/a
Dec20.6 C (69.1 F)-28.9 C (-20.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Joliet by the year they were set 1,464 records at Joliet still stand. 1895 holds the most, with 77. 0204060801893: 151894: 461895: 771896: 631897: 621898: 411899: 521900: 301927: 11939: 11946: 421947: 561948: 291949: 341950: 571951: 601952: 391953: 331954: 411955: 321956: 251957: 251958: 301959: 281960: 321961: 251962: 351963: 541964: 351965: 401966: 261967: 361968: 281969: 221970: 281971: 321972: 321973: 151974: 312025: 412026: 33189318981946195119561961196619712026
1,464 records at Joliet still stand. 1895 holds the most, with 77.
Standing records at Joliet by the year they were set
Year setStanding records
189315
189446
189577
189663
189762
189841
189952
190030
19271
19391
194642
194756
194829
194934
195057
195160
195239
195333
195441
195532
195625
195725
195830
195928
196032
196125
196235
196354
196435
196540
196626
196736
196828
196922
197028
197132
197232
197315
197431
202541
202633

All-Time Record Progression

1 new records
When Joliet set new all-time records 1 all-time records were set at Joliet between 11 June 1926 and 11 June 1926. Each dot is a new record. Record daily precipitation11 June 1926: Record daily precipitation 174.2 mm (6.9 in)
1 all-time records were set at Joliet between 11 June 1926 and 11 June 1926. Each dot is a new record.
When Joliet set new all-time records
DateKindDetail
1926-06-11Record daily precipitationRecord daily precipitation 174.2 mm (6.9 in)

Wettest Day of Each Month

Jun: 174.2 mm (6.9 in)
Record daily precipitation for each month at Joliet The wettest day on record for each calendar month at Joliet. The most was 174.2 mm (6.9 in) on 11 June 1926. 050100150200 Jan: 69.1 mm (2.7 in), 19 January 1907 Jan Feb: 59.4 mm (2.3 in), 6 February 1942 Feb Mar: 79.8 mm (3.1 in), 14 March 1944 Mar Apr: 88.9 mm (3.5 in), 5 April 1947 Apr May: 63.8 mm (2.5 in), 12 May 1966 May Jun: 174.2 mm (6.9 in), 11 June 1926 Jun Jul: 136.4 mm (5.4 in), 13 July 1957 Jul Aug: 83.3 mm (3.3 in), 17 August 1968 Aug Sep: 135.1 mm (5.3 in), 7 September 1942 Sep Oct: 86.4 mm (3.4 in), 11 October 1954 Oct Nov: 44.5 mm (1.8 in), 17 November 1928 Nov Dec: 75.9 mm (3.0 in), 19 December 1895 Dec
The wettest day on record for each calendar month at Joliet. The most was 174.2 mm (6.9 in) on 11 June 1926.
Record daily precipitation for each month at Joliet
MonthRecord daily precipitation (mm)Date
Jan69.1 mm (2.7 in)19 January 1907
Feb59.4 mm (2.3 in)6 February 1942
Mar79.8 mm (3.1 in)14 March 1944
Apr88.9 mm (3.5 in)5 April 1947
May63.8 mm (2.5 in)12 May 1966
Jun174.2 mm (6.9 in)11 June 1926
Jul136.4 mm (5.4 in)13 July 1957
Aug83.3 mm (3.3 in)17 August 1968
Sep135.1 mm (5.3 in)7 September 1942
Oct86.4 mm (3.4 in)11 October 1954
Nov44.5 mm (1.8 in)17 November 1928
Dec75.9 mm (3.0 in)19 December 1895

Period of Record Coverage

1893 to 2026
Days with data per year at Joliet 42 years of record at Joliet, 1893 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1893, 1938, 1939, 1942, 1953, 1973, 2026. 1893: 60 of 365 days1894: 363 of 365 days1895: 363 of 365 days1896: 366 of 366 days1897: 365 of 365 days1898: 365 of 365 days1899: 365 of 365 days1900: 362 of 365 days1938: 1 of 365 days1939: 1 of 365 days1942: 1 of 365 days1946: 363 of 365 days1947: 361 of 365 days1948: 365 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 255 of 365 days1954: 365 of 365 days1955: 360 of 365 days1956: 364 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 350 of 365 days1960: 362 of 366 days1961: 363 of 365 days1962: 364 of 365 days1963: 358 of 365 days1964: 354 of 366 days1965: 357 of 365 days1966: 356 of 365 days1967: 359 of 365 days1968: 359 of 366 days1969: 359 of 365 days1970: 361 of 365 days1971: 363 of 365 days1972: 333 of 366 days1973: 295 of 365 days1974: 332 of 365 days2025: 357 of 365 days2026: 182 of 365 days1900195019601970
42 years of record at Joliet, 1893 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1893, 1938, 1939, 1942, 1953, 1973, 2026.
Days with data per year at Joliet
YearDays with dataShare of yearComplete
18936016%No
189436399%Yes
189536399%Yes
1896366100%Yes
1897365100%Yes
1898365100%Yes
1899365100%Yes
190036299%Yes
193810%No
193910%No
194210%No
194636399%Yes
194736199%Yes
1948365100%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
195325570%No
1954365100%Yes
195536099%Yes
195636499%Yes
1957365100%Yes
1958365100%Yes
195935096%Yes
196036299%Yes
196136399%Yes
1962364100%Yes
196335898%Yes
196435497%Yes
196535798%Yes
196635698%Yes
196735998%Yes
196835998%Yes
196935998%Yes
197036199%Yes
197136399%Yes
197233391%Yes
197329581%No
197433291%Yes
202535798%Yes
202618250%No

Latest Records

20
Latest records at Joliet
DateStationRecordValueBeat old record byOld record stoodSignificance
12 October 2026Joliet, USdaily high max (Provisional)32.0 C (89.6 F)2.6 C (4.7 F)69 years34 of 100 (Routine)
30 June 2026Joliet, USdaily high min25.2 C (77.4 F)1.3 C (2.3 F)56 years28 of 100 (Routine)
29 June 2026Joliet, USdaily high min25.1 C (77.2 F)1.2 C (2.2 F)131 years42 of 100 (Notable)
10 June 2026Joliet, USdaily high min22.4 C (72.3 F)0.7 C (1.3 F)67 years31 of 100 (Routine)
9 June 2026Joliet, USdaily high min22.3 C (72.1 F)0.6 C (1.1 F)61 years29 of 100 (Routine)
5 June 2026Joliet, USdaily high min22.1 C (71.8 F)0.4 C (0.7 F)55 years26 of 100 (Routine)
18 May 2026Joliet, USdaily high min21.1 C (70.0 F)2.2 C (4.0 F)76 years37 of 100 (Notable)
2 May 2026Joliet, USdaily low min-0.8 C (30.6 F)0.2 C (0.4 F)60 years28 of 100 (Routine)
24 April 2026Joliet, USdaily high min19.3 C (66.7 F)1.5 C (2.7 F)65 years31 of 100 (Routine)
15 April 2026Joliet, USdaily high min17.6 C (63.7 F)2.0 C (3.6 F)72 years34 of 100 (Routine)
14 April 2026Joliet, USdaily high max28.5 C (83.3 F)2.9 C (5.2 F)129 years44 of 100 (Notable)
13 April 2026Joliet, USdaily high min18.0 C (64.4 F)3.0 C (5.4 F)129 years45 of 100 (Notable)
30 March 2026Joliet, USmonthly high max28.4 C (83.1 F)1.2 C (2.2 F)131 years51 of 100 (Notable)
26 March 2026Joliet, USdaily high max25.1 C (77.2 F)1.8 C (3.2 F)57 years29 of 100 (Routine)
25 March 2026Joliet, USdaily high max23.3 C (73.9 F)1.1 C (2.0 F)84 years36 of 100 (Notable)
22 March 2026Joliet, USdaily high max22.4 C (72.3 F)1.8 C (3.2 F)131 years42 of 100 (Notable)
21 March 2026Joliet, USdaily high max26.7 C (80.1 F)1.7 C (3.1 F)131 years42 of 100 (Notable)
17 March 2026Joliet, USdaily low max-3.9 C (25.0 F)1.7 C (3.1 F)125 years42 of 100 (Notable)
10 March 2026Joliet, USdaily high min8.0 C (46.4 F)1.3 C (2.3 F)131 years42 of 100 (Notable)
9 March 2026Joliet, USdaily high max23.0 C (73.4 F)1.9 C (3.4 F)52 years27 of 100 (Routine)

Climate Trend

32 complete years, 1894 to 2025
Annual mean temperature at Joliet as warming stripes, 1894 to 2025 One stripe for each of 32 complete years at Joliet, 1894 to 2025. Blue stripes are years cooler than the station's own mean of 10.5 C (50.8 F); red stripes are warmer. The coolest year was 1950, at 8.3 C (47.0 F), and the warmest was 2025, at 11.9 C (53.5 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1894: 11.4 C, +1.0 C from the station mean1895: 10.2 C, -0.3 C from the station mean1896: 11.5 C, +1.0 C from the station mean1897: 10.9 C, +0.5 C from the station mean1898: 10.2 C, -0.3 C from the station mean1899: 9.8 C, -0.7 C from the station mean1900: 10.2 C, -0.3 C from the station mean1946: 10.4 C, 0.0 C from the station mean1947: 9.3 C, -1.2 C from the station mean1948: 9.5 C, -1.0 C from the station mean1949: 10.3 C, -0.2 C from the station mean1950: 8.3 C, -2.1 C from the station mean1951: 8.5 C, -2.0 C from the station mean1952: 10.0 C, -0.5 C from the station mean1954: 11.6 C, +1.1 C from the station mean1955: 11.2 C, +0.8 C from the station mean1956: 11.6 C, +1.2 C from the station mean1957: 10.8 C, +0.3 C from the station mean1958: 10.0 C, -0.5 C from the station mean1960: 10.3 C, -0.2 C from the station mean1961: 10.5 C, 0.0 C from the station mean1962: 9.9 C, -0.6 C from the station mean1963: 10.1 C, -0.3 C from the station mean1964: 11.5 C, +1.1 C from the station mean1965: 11.1 C, +0.6 C from the station mean1966: 10.6 C, +0.1 C from the station mean1967: 10.1 C, -0.4 C from the station mean1968: 11.1 C, +0.7 C from the station mean1969: 10.2 C, -0.3 C from the station mean1970: 10.8 C, +0.4 C from the station mean1971: 11.3 C, +0.8 C from the station mean2025: 11.9 C, +1.5 C from the station mean18941900191019201930194019501960197019801990200020102020
One stripe for each of 32 complete years at Joliet, 1894 to 2025. Blue stripes are years cooler than the station's own mean of 10.5 C (50.8 F); red stripes are warmer. The coolest year was 1950, at 8.3 C (47.0 F), and the warmest was 2025, at 11.9 C (53.5 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Joliet as warming stripes, 1894 to 2025
YearAnnual mean temperatureDifference from the station mean
189411.4 C+0.96 C
189510.2 C-0.29 C
189611.5 C+1.05 C
189710.9 C+0.46 C
189810.2 C-0.27 C
18999.8 C-0.71 C
190010.2 C-0.31 C
194610.4 C-0.03 C
19479.3 C-1.15 C
19489.5 C-1.02 C
194910.3 C-0.17 C
19508.3 C-2.13 C
19518.5 C-1.97 C
195210.0 C-0.51 C
195411.6 C+1.13 C
195511.2 C+0.76 C
195611.6 C+1.16 C
195710.8 C+0.29 C
195810.0 C-0.45 C
196010.3 C-0.22 C
196110.5 C0.00 C
19629.9 C-0.59 C
196310.1 C-0.34 C
196411.5 C+1.06 C
196511.1 C+0.61 C
196610.6 C+0.08 C
196710.1 C-0.41 C
196811.1 C+0.67 C
196910.2 C-0.26 C
197010.8 C+0.36 C
197111.3 C+0.85 C
202511.9 C+1.46 C

The fitted trend in annual mean temperature here over 1894 to 2025 is 0.04 C (-0.07 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Joliet
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.04 C (-0.07 to 0.14) per decade0.1 F (-0.1 to 0.3) per decade1894 to 202532Not clearly different from zero
Mean daily maximum0.00 C (-0.12 to 0.11) per decade-0.01 F (-0.22 to 0.20) per decade1894 to 202532Not clearly different from zero
Mean daily minimum0.08 C (-0.03 to 0.20) per decade0.1 F (-0.1 to 0.4) per decade1894 to 202532Not clearly different from zero

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

1893 to 2026
Yearly extremes at Joliet: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)189736.1 C (97.0 F)42
Coldest night (TNn)-28.9 C (-20.0 F)1897-23.9 C (-11.0 F)43
Wettest day (Rx1day)174.2 mm (6.9 in)192659.7 mm (2.4 in)85
Wettest five days (Rx5day)234.2 mm (9.2 in)192685.2 mm (3.4 in)84
Longest dry spell (CDD)36 days191720 days85

Hottest day (TXx)

Hottest day (TXx) at Joliet by year The hottest day of the year at Joliet, 1893 to 2026. The record is 39.4 C (102.9 F) in 1897, marked on the chart; the median year is 36.1 C (97.0 F). 102030401900192019401960198020002020Record: 39.4 C (102.9 F) in 1897
The hottest day of the year at Joliet, 1893 to 2026. The record is 39.4 C (102.9 F) in 1897, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Joliet by year
YearHottest day (TXx)
189320.0 C (68.0 F)
189436.1 C (97.0 F)
189538.3 C (100.9 F)
189637.8 C (100.0 F)
189739.4 C (102.9 F)
189836.1 C (97.0 F)
189937.8 C (100.0 F)
190035.6 C (96.1 F)
1901n/a
1902n/a
1903n/a
1904n/a
1905n/a
1906n/a
1907n/a
1908n/a
1909n/a
1910n/a
1911n/a
1912n/a
1913n/a
1914n/a
1915n/a
1916n/a
1917n/a
1918n/a
1919n/a
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
193818.3 C (64.9 F)
193928.9 C (84.0 F)
1940n/a
1941n/a
194222.2 C (72.0 F)
1943n/a
1944n/a
1945n/a
194637.2 C (99.0 F)
194738.3 C (100.9 F)
194837.2 C (99.0 F)
194937.2 C (99.0 F)
195033.9 C (93.0 F)
195134.4 C (93.9 F)
195236.7 C (98.1 F)
195338.9 C (102.0 F)
195437.2 C (99.0 F)
195537.8 C (100.0 F)
195637.8 C (100.0 F)
195735.0 C (95.0 F)
195833.9 C (93.0 F)
195935.6 C (96.1 F)
196035.6 C (96.1 F)
196134.4 C (93.9 F)
196235.0 C (95.0 F)
196336.7 C (98.1 F)
196436.7 C (98.1 F)
196536.7 C (98.1 F)
196637.2 C (99.0 F)
196734.4 C (93.9 F)
196835.6 C (96.1 F)
196936.1 C (97.0 F)
197037.2 C (99.0 F)
197136.7 C (98.1 F)
197235.6 C (96.1 F)
197336.1 C (97.0 F)
197437.8 C (100.0 F)
2024n/a
202535.0 C (95.0 F)
202634.2 C (93.6 F)

Coldest night (TNn)

Coldest night (TNn) at Joliet by year The coldest night of the year at Joliet, 1893 to 2026. The record is -28.9 C (-20.0 F) in 1897, marked on the chart; the median year is -23.9 C (-11.0 F). -40-20020401900192019401960198020002020Record: -28.9 C (-20.0 F) in 1897
The coldest night of the year at Joliet, 1893 to 2026. The record is -28.9 C (-20.0 F) in 1897, marked on the chart; the median year is -23.9 C (-11.0 F).
Coldest night (TNn) at Joliet by year
YearColdest night (TNn)
1893-21.7 C (-7.1 F)
1894-26.1 C (-15.0 F)
1895-25.6 C (-14.1 F)
1896-23.3 C (-9.9 F)
1897-28.9 C (-20.0 F)
1898-22.2 C (-8.0 F)
1899-28.9 C (-20.0 F)
1900-21.7 C (-7.1 F)
1901n/a
1902n/a
1903n/a
1904n/a
1905n/a
1906n/a
1907n/a
1908n/a
1909n/a
1910n/a
1911n/a
1912n/a
1913n/a
1914n/a
1915n/a
1916n/a
1917n/a
1918n/a
1919n/a
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
1926n/a
19270.6 C (33.1 F)
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
19381.7 C (35.1 F)
193921.1 C (70.0 F)
1940n/a
1941n/a
19427.8 C (46.0 F)
1943n/a
1944n/a
1945n/a
1946-20.6 C (-5.1 F)
1947-23.3 C (-9.9 F)
1948-22.8 C (-9.0 F)
1949-23.3 C (-9.9 F)
1950-28.3 C (-18.9 F)
1951-28.9 C (-20.0 F)
1952-20.0 C (-4.0 F)
1953-23.9 C (-11.0 F)
1954-22.2 C (-8.0 F)
1955-23.9 C (-11.0 F)
1956-17.2 C (1.0 F)
1957-23.9 C (-11.0 F)
1958-25.0 C (-13.0 F)
1959-24.4 C (-11.9 F)
1960-27.8 C (-18.0 F)
1961-21.7 C (-7.1 F)
1962-26.1 C (-15.0 F)
1963-28.3 C (-18.9 F)
1964-21.1 C (-6.0 F)
1965-24.4 C (-11.9 F)
1966-27.2 C (-17.0 F)
1967-23.9 C (-11.0 F)
1968-25.6 C (-14.1 F)
1969-24.4 C (-11.9 F)
1970-27.2 C (-17.0 F)
1971-22.8 C (-9.0 F)
1972-25.6 C (-14.1 F)
1973-18.3 C (-0.9 F)
1974-25.6 C (-14.1 F)
2024n/a
2025-21.0 C (-5.8 F)
2026-21.1 C (-6.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Joliet by year The wettest day of the year at Joliet, 1893 to 2026. The record is 174.2 mm (6.9 in) in 1926, marked on the chart; the median year is 59.7 mm (2.4 in). 0501001502001900192019401960198020002020Record: 174.2 mm (6.9 in) in 1926
The wettest day of the year at Joliet, 1893 to 2026. The record is 174.2 mm (6.9 in) in 1926, marked on the chart; the median year is 59.7 mm (2.4 in).
Wettest day (Rx1day) at Joliet by year
YearWettest day (Rx1day)
189318.0 mm (0.7 in)
189439.4 mm (1.6 in)
189575.9 mm (3.0 in)
189645.7 mm (1.8 in)
189761.0 mm (2.4 in)
189862.0 mm (2.4 in)
189950.3 mm (2.0 in)
190059.2 mm (2.3 in)
190139.6 mm (1.6 in)
190276.2 mm (3.0 in)
190342.4 mm (1.7 in)
190449.5 mm (1.9 in)
190554.6 mm (2.1 in)
190663.2 mm (2.5 in)
190769.1 mm (2.7 in)
190857.2 mm (2.3 in)
190938.6 mm (1.5 in)
191032.5 mm (1.3 in)
1911106.7 mm (4.2 in)
191239.4 mm (1.6 in)
191352.6 mm (2.1 in)
191466.5 mm (2.6 in)
191562.5 mm (2.5 in)
191654.4 mm (2.1 in)
191745.2 mm (1.8 in)
191848.3 mm (1.9 in)
191966.0 mm (2.6 in)
192053.1 mm (2.1 in)
192142.2 mm (1.7 in)
192254.1 mm (2.1 in)
192361.0 mm (2.4 in)
192439.6 mm (1.6 in)
192536.8 mm (1.4 in)
1926174.2 mm (6.9 in)
192768.6 mm (2.7 in)
192854.6 mm (2.1 in)
192970.6 mm (2.8 in)
193072.1 mm (2.8 in)
193155.1 mm (2.2 in)
193260.5 mm (2.4 in)
193370.6 mm (2.8 in)
193440.4 mm (1.6 in)
193539.6 mm (1.6 in)
193659.7 mm (2.4 in)
193729.2 mm (1.1 in)
193845.2 mm (1.8 in)
193962.2 mm (2.4 in)
194039.4 mm (1.6 in)
194185.9 mm (3.4 in)
1942135.1 mm (5.3 in)
194347.8 mm (1.9 in)
194479.8 mm (3.1 in)
194553.6 mm (2.1 in)
194681.3 mm (3.2 in)
194788.9 mm (3.5 in)
194866.0 mm (2.6 in)
194957.7 mm (2.3 in)
195064.3 mm (2.5 in)
195189.9 mm (3.5 in)
195266.0 mm (2.6 in)
195339.6 mm (1.6 in)
195486.4 mm (3.4 in)
195565.3 mm (2.6 in)
195646.0 mm (1.8 in)
1957136.4 mm (5.4 in)
195879.2 mm (3.1 in)
195951.6 mm (2.0 in)
196062.7 mm (2.5 in)
196184.8 mm (3.3 in)
196264.3 mm (2.5 in)
196347.8 mm (1.9 in)
196461.5 mm (2.4 in)
196572.9 mm (2.9 in)
196673.7 mm (2.9 in)
196767.3 mm (2.6 in)
196883.3 mm (3.3 in)
196961.5 mm (2.4 in)
197085.6 mm (3.4 in)
197153.3 mm (2.1 in)
197266.0 mm (2.6 in)
197358.9 mm (2.3 in)
197436.8 mm (1.4 in)
20240.0 mm (0.00 in)
202532.0 mm (1.3 in)
202631.0 mm (1.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Joliet by year The wettest five days of the year at Joliet, 1893 to 2026. The record is 234.2 mm (9.2 in) in 1926, marked on the chart; the median year is 85.2 mm (3.4 in). 01002003001900192019401960198020002020Record: 234.2 mm (9.2 in) in 1926
The wettest five days of the year at Joliet, 1893 to 2026. The record is 234.2 mm (9.2 in) in 1926, marked on the chart; the median year is 85.2 mm (3.4 in).
Wettest five days (Rx5day) at Joliet by year
YearWettest five days (Rx5day)
189332.5 mm (1.3 in)
189498.5 mm (3.9 in)
1895143.8 mm (5.7 in)
189678.7 mm (3.1 in)
1897108.8 mm (4.3 in)
1898118.8 mm (4.7 in)
189981.0 mm (3.2 in)
190091.4 mm (3.6 in)
190169.9 mm (2.8 in)
1902134.9 mm (5.3 in)
190381.0 mm (3.2 in)
190472.3 mm (2.8 in)
190570.3 mm (2.8 in)
190674.7 mm (2.9 in)
190790.4 mm (3.6 in)
190878.7 mm (3.1 in)
190965.6 mm (2.6 in)
191051.5 mm (2.0 in)
1911232.0 mm (9.1 in)
191259.3 mm (2.3 in)
191358.2 mm (2.3 in)
191486.8 mm (3.4 in)
191589.7 mm (3.5 in)
191671.0 mm (2.8 in)
191774.9 mm (2.9 in)
191874.5 mm (2.9 in)
1919118.3 mm (4.7 in)
192072.6 mm (2.9 in)
192171.7 mm (2.8 in)
192268.3 mm (2.7 in)
1923115.4 mm (4.5 in)
192499.3 mm (3.9 in)
192572.1 mm (2.8 in)
1926234.2 mm (9.2 in)
1927125.9 mm (5.0 in)
192872.0 mm (2.8 in)
1929104.6 mm (4.1 in)
193074.7 mm (2.9 in)
193199.3 mm (3.9 in)
193282.3 mm (3.2 in)
193391.2 mm (3.6 in)
193471.3 mm (2.8 in)
193572.5 mm (2.9 in)
1936163.3 mm (6.4 in)
193749.5 mm (1.9 in)
193873.7 mm (2.9 in)
193996.0 mm (3.8 in)
194063.0 mm (2.5 in)
1941195.4 mm (7.7 in)
1942180.5 mm (7.1 in)
194383.6 mm (3.3 in)
194496.2 mm (3.8 in)
194595.3 mm (3.8 in)
194688.4 mm (3.5 in)
1947136.1 mm (5.4 in)
194877.5 mm (3.1 in)
194982.0 mm (3.2 in)
1950119.9 mm (4.7 in)
195198.8 mm (3.9 in)
1952118.7 mm (4.7 in)
195368.3 mm (2.7 in)
1954115.6 mm (4.6 in)
195593.0 mm (3.7 in)
195699.4 mm (3.9 in)
1957161.8 mm (6.4 in)
195889.6 mm (3.5 in)
195980.8 mm (3.2 in)
196065.7 mm (2.6 in)
1961157.0 mm (6.2 in)
196270.6 mm (2.8 in)
196382.1 mm (3.2 in)
196467.1 mm (2.6 in)
196598.3 mm (3.9 in)
1966117.9 mm (4.6 in)
1967123.4 mm (4.9 in)
196890.0 mm (3.5 in)
196969.6 mm (2.7 in)
1970105.8 mm (4.2 in)
197165.8 mm (2.6 in)
1972102.6 mm (4.0 in)
197388.6 mm (3.5 in)
197459.5 mm (2.3 in)
2024n/a
202527.0 mm (1.1 in)
202635.1 mm (1.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Joliet by year The longest dry spell of the year at Joliet, 1893 to 2026. The record is 36 days in 1917, marked on the chart; the median year is 20 days. 0102030401900192019401960198020002020Record: 36 days in 1917
The longest dry spell of the year at Joliet, 1893 to 2026. The record is 36 days in 1917, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Joliet by year
YearLongest dry spell (CDD)
189311 days
189418 days
189525 days
189617 days
189724 days
189823 days
189926 days
190017 days
190118 days
190222 days
190314 days
190422 days
190518 days
190620 days
190717 days
190835 days
190917 days
191021 days
191113 days
191229 days
191316 days
191423 days
191533 days
191623 days
191736 days
191816 days
191927 days
192023 days
192114 days
192216 days
192318 days
192414 days
192523 days
192611 days
192716 days
192820 days
192919 days
193022 days
193119 days
193216 days
193333 days
193426 days
193515 days
193627 days
193719 days
193823 days
193929 days
194017 days
194114 days
194227 days
194328 days
194428 days
194520 days
194622 days
194726 days
194829 days
194921 days
195026 days
195116 days
195233 days
195322 days
195420 days
195515 days
195625 days
195723 days
195827 days
195922 days
196014 days
196118 days
196218 days
196318 days
196424 days
196520 days
196623 days
196719 days
196820 days
196925 days
197015 days
197124 days
197214 days
197314 days
197415 days
20243 days
202516 days
202612 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

32 years with a frost

Across 32 years with a frost, the median last spring frost at Joliet falls on 25 April and the median first autumn frost on 20 October, which leaves a median of 177 days between them.

Fitted over all years, the growing season changes by +0.8 days per decade at this station.

Frost dates and growing season at Joliet
MeasureMedian, all yearsEarliest periodRecent period (1896 to 2025)Recent against earliestFitted trend
Last spring frost25 Apriln/a25 Apriln/a+0.3 days per decade
First autumn frost20 Octobern/a22 Octobern/a+1.1 days per decade
Growing days177 daysn/a177 daysn/a+0.8 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

74 years, 1896 to 1973

A day with at least 58.4 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 145.3 mm (5.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Joliet: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years58.4 mm (2.3 in)
5 years77.4 mm (3.0 in)
10 years91.5 mm (3.6 in)
25 years111.3 mm (4.4 in)
50 years127.6 mm (5.0 in)
100 years145.3 mm (5.7 in)Longer than the 74 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, 74 years of values from 1896 to 1973.

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: 174.2 mm (6.9 in) in 1926; 136.4 mm (5.4 in) in 1957; 135.1 mm (5.3 in) in 1942.

Download the Data

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