Daily records
Page built 2026-10-17
Data as of 2025-12-31
Search
Built 2026-10-17 (17 October 2026)

Monticello Weather Records (USC00115791)

Record envelope, standing records and threshold days for Monticello (USC00115791), Illinois, United States, with 66 years of record.

Key Facts for Monticello

  • Monticello (USC00115791) is a weather station in Illinois, United States at 40.03 latitude and -88.57 longitude, 192 m (630 ft) above sea level.
  • The station reports from 1899 to 1964, 66 years of record.
  • 1,460 records set at Monticello still stand.
  • Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

  • Location: Illinois, United States, 40.03 latitude, -88.57 longitude.
  • Elevation: 192 m (630 ft).
  • Period of record: 1899 to 1964, 66 years.
  • Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Monticello, with 2026 drawn through them The band shows the record high and record low for each calendar day at Monticello. 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 Monticello. 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 Monticello, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan13.9 C (57.0 F)-22.2 C (-8.0 F)n/an/a
Feb17.2 C (63.0 F)-26.7 C (-16.1 F)n/an/a
Mar26.1 C (79.0 F)-17.8 C (0.0 F)n/an/a
Apr29.4 C (84.9 F)-6.7 C (19.9 F)n/an/a
May31.7 C (89.1 F)0.0 C (32.0 F)n/an/a
Jun35.0 C (95.0 F)7.2 C (45.0 F)n/an/a
Jul41.1 C (106.0 F)10.6 C (51.1 F)n/an/a
Aug38.9 C (102.0 F)9.4 C (48.9 F)n/an/a
Sep35.6 C (96.1 F)0.6 C (33.1 F)n/an/a
Oct33.3 C (91.9 F)-1.7 C (28.9 F)n/an/a
Nov26.1 C (79.0 F)-10.6 C (12.9 F)n/an/a
Dec16.1 C (61.0 F)-27.2 C (-17.0 F)n/an/a

Which Years Hold Standing Records

1,460 standing records
Standing records at Monticello by the year they were set 1,460 records at Monticello still stand. 1900 holds the most, with 634. 02004006008001899: 321900: 6341901: 4381902: 2561903: 10018991900190119021903
1,460 records at Monticello still stand. 1900 holds the most, with 634.
Standing records at Monticello by the year they were set
Year setStanding records
189932
1900634
1901438
1902256
1903100

Wettest Day of Each Month

Oct: 111.8 mm (4.4 in)
Record daily precipitation for each month at Monticello The wettest day on record for each calendar month at Monticello. The most was 111.8 mm (4.4 in) on 6 October 1955. 050100150 Jan: 44.7 mm (1.8 in), 9 January 1901 Jan Feb: 48.5 mm (1.9 in), 10 February 1959 Feb Mar: 52.8 mm (2.1 in), 4 March 1963 Mar Apr: 91.4 mm (3.6 in), 11 April 1944 Apr May: 85.3 mm (3.4 in), 8 May 1961 May Jun: 61.0 mm (2.4 in), 26 June 1953 Jun Jul: 74.4 mm (2.9 in), 20 July 1946 Jul Aug: 80.8 mm (3.2 in), 3 August 1943 Aug Sep: 54.6 mm (2.1 in), 18 September 1952 Sep Oct: 111.8 mm (4.4 in), 6 October 1955 Oct Nov: 45.0 mm (1.8 in), 16 November 1964 Nov Dec: 60.7 mm (2.4 in), 21 December 1949 Dec
The wettest day on record for each calendar month at Monticello. The most was 111.8 mm (4.4 in) on 6 October 1955.
Record daily precipitation for each month at Monticello
MonthRecord daily precipitation (mm)Date
Jan44.7 mm (1.8 in)9 January 1901
Feb48.5 mm (1.9 in)10 February 1959
Mar52.8 mm (2.1 in)4 March 1963
Apr91.4 mm (3.6 in)11 April 1944
May85.3 mm (3.4 in)8 May 1961
Jun61.0 mm (2.4 in)26 June 1953
Jul74.4 mm (2.9 in)20 July 1946
Aug80.8 mm (3.2 in)3 August 1943
Sep54.6 mm (2.1 in)18 September 1952
Oct111.8 mm (4.4 in)6 October 1955
Nov45.0 mm (1.8 in)16 November 1964
Dec60.7 mm (2.4 in)21 December 1949

Period of Record Coverage

1899 to 1903
Days with data per year at Monticello 5 years of record at Monticello, 1899 to 1903. 4 years have data for under 90 percent of days and are left out of rankings: 1899, 1901, 1902, 1903. 1899: 30 of 365 days1900: 333 of 365 days1901: 249 of 365 days1902: 140 of 365 days1903: 66 of 365 days1900
5 years of record at Monticello, 1899 to 1903. 4 years have data for under 90 percent of days and are left out of rankings: 1899, 1901, 1902, 1903.
Days with data per year at Monticello
YearDays with dataShare of yearComplete
1899308%No
190033391%Yes
190124968%No
190214038%No
19036618%No

Latest Records

0

No records were set at this station in the latest data.

Extremes by Year

1899 to 1964
Yearly extremes at Monticello: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.1 C (106.0 F)190129.4 C (84.9 F)5
Coldest night (TNn)-27.2 C (-17.0 F)1901-23.9 C (-11.0 F)5
Wettest day (Rx1day)111.8 mm (4.4 in)195555.7 mm (2.2 in)28
Wettest five days (Rx5day)181.2 mm (7.1 in)195593.9 mm (3.7 in)28
Longest dry spell (CDD)45 days190123 days28

Hottest day (TXx)

Hottest day (TXx) at Monticello by year The hottest day of the year at Monticello, 1899 to 1964. The record is 41.1 C (106.0 F) in 1901, marked on the chart; the median year is 29.4 C (84.9 F). 25303540451900192019401960Record: 41.1 C (106.0 F) in 1901
The hottest day of the year at Monticello, 1899 to 1964. The record is 41.1 C (106.0 F) in 1901, marked on the chart; the median year is 29.4 C (84.9 F).
Hottest day (TXx) at Monticello by year
YearHottest day (TXx)
189929.4 C (84.9 F)
190036.7 C (98.1 F)
190141.1 C (106.0 F)
190229.4 C (84.9 F)
190328.9 C (84.0 F)
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a

Coldest night (TNn)

Coldest night (TNn) at Monticello by year The coldest night of the year at Monticello, 1899 to 1964. The record is -27.2 C (-17.0 F) in 1901, marked on the chart; the median year is -23.9 C (-11.0 F). -30-20-100101900192019401960Record: -27.2 C (-17.0 F) in 1901
The coldest night of the year at Monticello, 1899 to 1964. The record is -27.2 C (-17.0 F) in 1901, marked on the chart; the median year is -23.9 C (-11.0 F).
Coldest night (TNn) at Monticello by year
YearColdest night (TNn)
18998.9 C (48.0 F)
1900-20.6 C (-5.1 F)
1901-27.2 C (-17.0 F)
1902-23.9 C (-11.0 F)
1903-26.7 C (-16.1 F)
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Monticello by year The wettest day of the year at Monticello, 1899 to 1964. The record is 111.8 mm (4.4 in) in 1955, marked on the chart; the median year is 55.7 mm (2.2 in). 2550751001251900192019401960Record: 111.8 mm (4.4 in) in 1955
The wettest day of the year at Monticello, 1899 to 1964. The record is 111.8 mm (4.4 in) in 1955, marked on the chart; the median year is 55.7 mm (2.2 in).
Wettest day (Rx1day) at Monticello by year
YearWettest day (Rx1day)
189945.0 mm (1.8 in)
190049.0 mm (1.9 in)
190144.7 mm (1.8 in)
190227.9 mm (1.1 in)
190332.3 mm (1.3 in)
194236.3 mm (1.4 in)
194380.8 mm (3.2 in)
194491.4 mm (3.6 in)
194553.1 mm (2.1 in)
194674.4 mm (2.9 in)
194757.7 mm (2.3 in)
194855.9 mm (2.2 in)
194960.7 mm (2.4 in)
195043.9 mm (1.7 in)
195166.5 mm (2.6 in)
195254.6 mm (2.1 in)
195361.0 mm (2.4 in)
195468.3 mm (2.7 in)
1955111.8 mm (4.4 in)
195678.0 mm (3.1 in)
195755.4 mm (2.2 in)
195872.4 mm (2.9 in)
195948.5 mm (1.9 in)
196051.1 mm (2.0 in)
196185.3 mm (3.4 in)
196245.2 mm (1.8 in)
196352.8 mm (2.1 in)
196487.6 mm (3.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Monticello by year The wettest five days of the year at Monticello, 1899 to 1964. The record is 181.2 mm (7.1 in) in 1955, marked on the chart; the median year is 93.9 mm (3.7 in). 0501001502001900192019401960Record: 181.2 mm (7.1 in) in 1955
The wettest five days of the year at Monticello, 1899 to 1964. The record is 181.2 mm (7.1 in) in 1955, marked on the chart; the median year is 93.9 mm (3.7 in).
Wettest five days (Rx5day) at Monticello by year
YearWettest five days (Rx5day)
189965.6 mm (2.6 in)
190091.4 mm (3.6 in)
190170.2 mm (2.8 in)
190234.3 mm (1.4 in)
190343.2 mm (1.7 in)
194264.0 mm (2.5 in)
1943150.9 mm (5.9 in)
1944115.8 mm (4.6 in)
194598.0 mm (3.9 in)
194696.3 mm (3.8 in)
1947110.6 mm (4.4 in)
1948119.9 mm (4.7 in)
1949113.5 mm (4.5 in)
195086.1 mm (3.4 in)
1951110.5 mm (4.4 in)
195264.5 mm (2.5 in)
195375.5 mm (3.0 in)
195486.1 mm (3.4 in)
1955181.2 mm (7.1 in)
1956127.8 mm (5.0 in)
195790.2 mm (3.6 in)
1958128.0 mm (5.0 in)
195964.7 mm (2.5 in)
1960112.6 mm (4.4 in)
1961122.9 mm (4.8 in)
196279.7 mm (3.1 in)
196381.7 mm (3.2 in)
1964162.6 mm (6.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Monticello by year The longest dry spell of the year at Monticello, 1899 to 1964. The record is 45 days in 1901, marked on the chart; the median year is 23 days. 010203040501900192019401960Record: 45 days in 1901
The longest dry spell of the year at Monticello, 1899 to 1964. The record is 45 days in 1901, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Monticello by year
YearLongest dry spell (CDD)
189914 days
190027 days
190145 days
190226 days
190317 days
19429 days
194328 days
194428 days
194528 days
194617 days
194726 days
194832 days
194922 days
195018 days
195115 days
195225 days
195322 days
195423 days
195517 days
195632 days
195723 days
195831 days
195918 days
196020 days
196123 days
196217 days
196319 days
196426 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.

Download the Data

  • Data for Monticello standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Monticello 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 (2025-12-31).