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Built 2026-10-17 (17 October 2026)

Bluffs Weather Records (USC00110781)

Record envelope, standing records and threshold days for Bluffs (USC00110781), Illinois, United States, with 47 years of record.

Key Facts for Bluffs

  • Bluffs (USC00110781) is a weather station in Illinois, United States at 39.75 latitude and -90.53 longitude, 165 m (540 ft) above sea level.
  • The station reports from 1940 to 1986, 47 years of record.
  • 0 records set at Bluffs still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Bluffs set a daily record precipitation of 23.6 mm (0.9 in) on 25 October 1986.

About the Station

  • Location: Illinois, United States, 39.75 latitude, -90.53 longitude.
  • Elevation: 165 m (540 ft).
  • Period of record: 1940 to 1986, 47 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Bluffs, with 2026 drawn through them The band shows the record high and record low for each calendar day at Bluffs. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Bluffs. 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 Bluffs, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Bluffs by the year they were set 0 records at Bluffs still stand. 00000000000
0 records at Bluffs still stand.
Standing records at Bluffs by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Bluffs set new all-time records 1 all-time records were set at Bluffs between 4 July 1986 and 4 July 1986. Each dot is a new record. Record daily precipitation4 July 1986: Record daily precipitation 195.6 mm (7.7 in)
1 all-time records were set at Bluffs between 4 July 1986 and 4 July 1986. Each dot is a new record.
When Bluffs set new all-time records
DateKindDetail
1986-07-04Record daily precipitationRecord daily precipitation 195.6 mm (7.7 in)

Wettest Day of Each Month

Jul: 195.6 mm (7.7 in)
Record daily precipitation for each month at Bluffs The wettest day on record for each calendar month at Bluffs. The most was 195.6 mm (7.7 in) on 4 July 1986. 050100150200 Jan: 34.5 mm (1.4 in), 20 January 1974 Jan Feb: 46.5 mm (1.8 in), 4 February 1942 Feb Mar: 63.5 mm (2.5 in), 3 March 1985 Mar Apr: 102.1 mm (4.0 in), 11 April 1979 Apr May: 84.6 mm (3.3 in), 6 May 1977 May Jun: 70.4 mm (2.8 in), 21 June 1965 Jun Jul: 195.6 mm (7.7 in), 4 July 1986 Jul Aug: 75.2 mm (3.0 in), 7 August 1982 Aug Sep: 122.2 mm (4.8 in), 16 September 1965 Sep Oct: 79.5 mm (3.1 in), 4 October 1941 Oct Nov: 61.7 mm (2.4 in), 2 November 1946 Nov Dec: 111.8 mm (4.4 in), 31 December 1984 Dec
The wettest day on record for each calendar month at Bluffs. The most was 195.6 mm (7.7 in) on 4 July 1986.
Record daily precipitation for each month at Bluffs
MonthRecord daily precipitation (mm)Date
Jan34.5 mm (1.4 in)20 January 1974
Feb46.5 mm (1.8 in)4 February 1942
Mar63.5 mm (2.5 in)3 March 1985
Apr102.1 mm (4.0 in)11 April 1979
May84.6 mm (3.3 in)6 May 1977
Jun70.4 mm (2.8 in)21 June 1965
Jul195.6 mm (7.7 in)4 July 1986
Aug75.2 mm (3.0 in)7 August 1982
Sep122.2 mm (4.8 in)16 September 1965
Oct79.5 mm (3.1 in)4 October 1941
Nov61.7 mm (2.4 in)2 November 1946
Dec111.8 mm (4.4 in)31 December 1984

Latest Records

20
Latest records at Bluffs
DateStationRecordValueBeat old record byOld record stoodSignificance
25 October 1986Bluffs, USdaily rain23.6 mm (0.9 in)2.3 mm (0.09 in)8 years7 of 100 (Routine)
30 September 1986Bluffs, USdaily rain37.6 mm (1.5 in)3.8 mm (0.15 in)32 years15 of 100 (Routine)
24 September 1986Bluffs, USdaily rain63.0 mm (2.5 in)10.4 mm (0.4 in)16 years15 of 100 (Routine)
28 July 1986Bluffs, USdaily rain27.4 mm (1.1 in)7.6 mm (0.30 in)12 years11 of 100 (Routine)
11 July 1986Bluffs, USdaily rain69.1 mm (2.7 in)2.3 mm (0.09 in)45 years18 of 100 (Routine)
4 July 1986Bluffs, USall-time rain195.6 mm (7.7 in)73.4 mm (2.9 in)20 years70 of 100 (Major)
28 June 1986Bluffs, USdaily rain50.8 mm (2.0 in)16.0 mm (0.6 in)28 years23 of 100 (Routine)
27 June 1986Bluffs, USdaily rain51.3 mm (2.0 in)12.7 mm (0.5 in)3 years13 of 100 (Routine)
15 February 1986Bluffs, USdaily snowfall10.2 cm (4.0 in)5.1 cm (2.0 in)43 years26 of 100 (Routine)
7 February 1986Bluffs, USdaily snowfall7.6 cm (3.0 in)5.1 cm (2.0 in)12 years17 of 100 (Routine)
1 February 1986Bluffs, USdaily rain33.8 mm (1.3 in)15.8 mm (0.6 in)18 years28 of 100 (Routine)
13 December 1985Bluffs, USdaily rain45.2 mm (1.8 in)20.3 mm (0.8 in)8 years22 of 100 (Routine)
30 November 1985Bluffs, USdaily rain47.0 mm (1.9 in)28.7 mm (1.1 in)10 years34 of 100 (Routine)
20 November 1985Bluffs, USdaily rain27.9 mm (1.1 in)6.8 mm (0.27 in)28 years18 of 100 (Routine)
19 November 1985Bluffs, USdaily rain43.2 mm (1.7 in)19.6 mm (0.8 in)2 years22 of 100 (Routine)
14 November 1985Bluffs, USdaily rain36.6 mm (1.4 in)31.0 mm (1.2 in)11 years36 of 100 (Notable)
31 October 1985Bluffs, USdaily rain40.6 mm (1.6 in)0.5 mm (0.02 in)38 years15 of 100 (Routine)
24 October 1985Bluffs, USdaily rain50.8 mm (2.0 in)10.9 mm (0.4 in)10 years14 of 100 (Routine)
22 September 1985Bluffs, USdaily rain53.3 mm (2.1 in)13.9 mm (0.5 in)15 years17 of 100 (Routine)
31 July 1985Bluffs, USdaily rain61.2 mm (2.4 in)17.3 mm (0.7 in)42 years26 of 100 (Routine)

Extremes by Year

1940 to 1986
Yearly extremes at Bluffs: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)195.6 mm (7.7 in)198662.2 mm (2.4 in)47
Wettest five days (Rx5day)209.1 mm (8.2 in)198691.7 mm (3.6 in)47
Longest dry spell (CDD)37 days197924 days47

Wettest day (Rx1day)

Wettest day (Rx1day) at Bluffs by year The wettest day of the year at Bluffs, 1940 to 1986. The record is 195.6 mm (7.7 in) in 1986, marked on the chart; the median year is 62.2 mm (2.4 in). 05010015020019401950196019701980Record: 195.6 mm (7.7 in) in 1986
The wettest day of the year at Bluffs, 1940 to 1986. The record is 195.6 mm (7.7 in) in 1986, marked on the chart; the median year is 62.2 mm (2.4 in).
Wettest day (Rx1day) at Bluffs by year
YearWettest day (Rx1day)
194066.8 mm (2.6 in)
194179.5 mm (3.1 in)
194258.4 mm (2.3 in)
194343.9 mm (1.7 in)
194457.4 mm (2.3 in)
194543.2 mm (1.7 in)
194669.1 mm (2.7 in)
194758.9 mm (2.3 in)
1948106.2 mm (4.2 in)
194977.5 mm (3.1 in)
195064.8 mm (2.6 in)
195184.8 mm (3.3 in)
195250.5 mm (2.0 in)
195345.0 mm (1.8 in)
195442.9 mm (1.7 in)
195566.5 mm (2.6 in)
195658.4 mm (2.3 in)
195753.3 mm (2.1 in)
195862.2 mm (2.4 in)
195955.1 mm (2.2 in)
196063.0 mm (2.5 in)
196157.9 mm (2.3 in)
196250.3 mm (2.0 in)
196364.8 mm (2.6 in)
196452.8 mm (2.1 in)
1965122.2 mm (4.8 in)
196651.1 mm (2.0 in)
196759.4 mm (2.3 in)
196872.4 mm (2.9 in)
196966.8 mm (2.6 in)
197058.4 mm (2.3 in)
197148.8 mm (1.9 in)
197254.1 mm (2.1 in)
197398.8 mm (3.9 in)
197446.7 mm (1.8 in)
197589.9 mm (3.5 in)
197638.6 mm (1.5 in)
197784.6 mm (3.3 in)
197873.2 mm (2.9 in)
1979102.1 mm (4.0 in)
198057.2 mm (2.3 in)
1981114.6 mm (4.5 in)
198275.2 mm (3.0 in)
198339.4 mm (1.6 in)
1984111.8 mm (4.4 in)
198563.5 mm (2.5 in)
1986195.6 mm (7.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Bluffs by year The wettest five days of the year at Bluffs, 1940 to 1986. The record is 209.1 mm (8.2 in) in 1986, marked on the chart; the median year is 91.7 mm (3.6 in). 5010015020025019401950196019701980Record: 209.1 mm (8.2 in) in 1986
The wettest five days of the year at Bluffs, 1940 to 1986. The record is 209.1 mm (8.2 in) in 1986, marked on the chart; the median year is 91.7 mm (3.6 in).
Wettest five days (Rx5day) at Bluffs by year
YearWettest five days (Rx5day)
194066.8 mm (2.6 in)
1941159.9 mm (6.3 in)
194281.8 mm (3.2 in)
1943113.3 mm (4.5 in)
194487.1 mm (3.4 in)
1945103.4 mm (4.1 in)
1946153.2 mm (6.0 in)
194783.0 mm (3.3 in)
1948111.8 mm (4.4 in)
194988.4 mm (3.5 in)
195096.8 mm (3.8 in)
1951129.5 mm (5.1 in)
195260.7 mm (2.4 in)
195373.7 mm (2.9 in)
195462.3 mm (2.5 in)
195597.8 mm (3.9 in)
195671.4 mm (2.8 in)
195781.6 mm (3.2 in)
1958104.6 mm (4.1 in)
195982.6 mm (3.3 in)
196079.5 mm (3.1 in)
1961122.4 mm (4.8 in)
196288.7 mm (3.5 in)
196389.7 mm (3.5 in)
196482.8 mm (3.3 in)
1965141.3 mm (5.6 in)
196686.1 mm (3.4 in)
1967109.6 mm (4.3 in)
1968101.1 mm (4.0 in)
1969157.0 mm (6.2 in)
1970136.4 mm (5.4 in)
197160.7 mm (2.4 in)
197273.7 mm (2.9 in)
1973114.3 mm (4.5 in)
197461.7 mm (2.4 in)
197598.0 mm (3.9 in)
197684.6 mm (3.3 in)
1977130.3 mm (5.1 in)
197876.8 mm (3.0 in)
1979121.7 mm (4.8 in)
1980130.0 mm (5.1 in)
1981114.6 mm (4.5 in)
198291.7 mm (3.6 in)
198378.3 mm (3.1 in)
198481.2 mm (3.2 in)
1985112.8 mm (4.4 in)
1986209.1 mm (8.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Bluffs by year The longest dry spell of the year at Bluffs, 1940 to 1986. The record is 37 days in 1979, marked on the chart; the median year is 24 days. 1020304019401950196019701980Record: 37 days in 1979
The longest dry spell of the year at Bluffs, 1940 to 1986. The record is 37 days in 1979, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Bluffs by year
YearLongest dry spell (CDD)
194020 days
194132 days
194229 days
194326 days
194426 days
194521 days
194626 days
194723 days
194829 days
194921 days
195029 days
195118 days
195226 days
195323 days
195420 days
195529 days
195632 days
195722 days
195831 days
195930 days
196019 days
196114 days
196216 days
196334 days
196430 days
196520 days
196629 days
196725 days
196824 days
196918 days
197017 days
197126 days
197218 days
197315 days
197416 days
197514 days
197626 days
197723 days
197821 days
197937 days
198027 days
198125 days
198218 days
198321 days
198422 days
198524 days
198626 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

42 years, 1941 to 1985

A day with at least 61.3 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 144.7 mm (5.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Bluffs: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years61.3 mm (2.4 in)
5 years79.7 mm (3.1 in)
10 years93.3 mm (3.7 in)
25 years112.3 mm (4.4 in)
50 years127.9 mm (5.0 in)Longer than the 42 years of record
100 years144.7 mm (5.7 in)Longer than the 42 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, 42 years of values from 1941 to 1985.

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: 122.2 mm (4.8 in) in 1965; 114.6 mm (4.5 in) in 1981; 111.8 mm (4.4 in) in 1984.

Download the Data

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