Utica Starved Rock Dam Weather Records (USC00118756)

Record envelope, standing records and threshold days for Utica Starved Rock Dam (USC00118756), Illinois, United States, with 63 years of record.

Key Facts for Utica Starved Rock Dam

Utica Starved Rock Dam (USC00118756) is a weather station in Illinois, United States at 41.32 latitude and -88.99 longitude, 140 m (460 ft) above sea level.
The station reports from 1943 to 2005, 63 years of record.
1,464 records set at Utica Starved Rock Dam still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Utica Starved Rock Dam set a daily record precipitation of 14.5 mm (0.6 in) on 14 February 2005.

About the Station

Location: Illinois, United States, 41.32 latitude, -88.99 longitude.
Elevation: 140 m (460 ft).
Period of record: 1943 to 2005, 63 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Utica Starved Rock Dam. 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 Utica Starved Rock Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.7 C (62.1 F)	-31.1 C (-24.0 F)	n/a	n/a
Feb	21.7 C (71.1 F)	-22.2 C (-8.0 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-10.0 C (14.0 F)	n/a	n/a
May	33.9 C (93.0 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	35.0 C (95.0 F)	3.3 C (37.9 F)	n/a	n/a
Jul	37.8 C (100.0 F)	8.3 C (46.9 F)	n/a	n/a
Aug	35.0 C (95.0 F)	7.8 C (46.0 F)	n/a	n/a
Sep	35.0 C (95.0 F)	2.8 C (37.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-5.6 C (21.9 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-17.2 C (1.0 F)	n/a	n/a
Dec	20.6 C (69.1 F)	-26.1 C (-15.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Utica Starved Rock Dam still stand. 2000 holds the most, with 206.

All-Time Record Progression

3 new records

3 all-time records were set at Utica Starved Rock Dam between 14 January 1979 and 19 January 1979. Each dot is a new record.

When Utica Starved Rock Dam set new all-time records
Date	Kind	Detail
1979-01-14	Record snow depth	Record snow depth 55.9 cm (22.0 in)
1979-01-17	Record snow depth	Record snow depth 58.4 cm (23.0 in)
1979-01-19	Record snow depth	Record snow depth 66.0 cm (26.0 in)

Wettest Day of Each Month

Jul: 177.0 mm (7.0 in)

The wettest day on record for each calendar month at Utica Starved Rock Dam. The most was 177.0 mm (7.0 in) on 14 July 1958.

Record daily precipitation for each month at Utica Starved Rock Dam
Month	Record daily precipitation (mm)	Date
Jan	49.5 mm (1.9 in)	1 January 1985
Feb	73.2 mm (2.9 in)	21 February 1997
Mar	96.5 mm (3.8 in)	25 March 1954
Apr	58.9 mm (2.3 in)	25 April 1950
May	86.9 mm (3.4 in)	12 May 1966
Jun	94.7 mm (3.7 in)	2 June 1970
Jul	177.0 mm (7.0 in)	14 July 1958
Aug	123.2 mm (4.9 in)	15 August 1981
Sep	102.1 mm (4.0 in)	12 September 1961
Oct	68.6 mm (2.7 in)	11 October 1969
Nov	62.0 mm (2.4 in)	28 November 1990
Dec	80.0 mm (3.1 in)	3 December 1982

Period of Record Coverage

1949 to 2005

14 years of record at Utica Starved Rock Dam, 1949 to 2005. 7 years have data for under 90 percent of days and are left out of rankings: 1949, 1970, 1976, 1977, 1978, 1997, 2005.

Days with data per year at Utica Starved Rock Dam
Year	Days with data	Share of year	Complete
1949	31	8%	No
1970	26	7%	No
1976	92	25%	No
1977	90	25%	No
1978	120	33%	No
1997	122	33%	No
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	363	99%	Yes
2004	365	100%	Yes
2005	49	13%	No

Latest Records

Latest records at Utica Starved Rock Dam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 February 2005	Utica Starved Rock Dam, US	daily rain	14.5 mm (0.6 in)	5.1 mm (0.20 in)	27 years	20 of 100 (Routine)
7 February 2005	Utica Starved Rock Dam, US	daily rain	7.1 mm (0.28 in)	1.3 mm (0.05 in)	19 years	12 of 100 (Routine)
6 January 2005	Utica Starved Rock Dam, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	36 years	4 of 100 (Routine)
2 January 2005	Utica Starved Rock Dam, US	daily rain	26.4 mm (1.0 in)	1.5 mm (0.06 in)	40 years	20 of 100 (Routine)
25 November 2004	Utica Starved Rock Dam, US	daily snowfall	5.3 cm (2.1 in)	0.2 cm (0.1 in)	27 years	14 of 100 (Routine)
16 September 2004	Utica Starved Rock Dam, US	daily rain	15.7 mm (0.6 in)	1.0 mm (0.04 in)	21 years	12 of 100 (Routine)
31 May 2004	Utica Starved Rock Dam, US	daily rain	33.8 mm (1.3 in)	28.2 mm (1.1 in)	19 years	34 of 100 (Routine)
16 March 2004	Utica Starved Rock Dam, US	daily snowfall	7.1 cm (2.8 in)	2.0 cm (0.8 in)	3 years	10 of 100 (Routine)
5 March 2004	Utica Starved Rock Dam, US	daily rain	31.8 mm (1.3 in)	6.4 mm (0.25 in)	40 years	24 of 100 (Routine)
3 February 2004	Utica Starved Rock Dam, US	daily snowfall	8.9 cm (3.5 in)	1.3 cm (0.5 in)	32 years	18 of 100 (Routine)
5 December 2003	Utica Starved Rock Dam, US	daily snowfall	1.3 cm (0.5 in)	0.5 cm (0.2 in)	52 years	20 of 100 (Routine)
10 July 2003	Utica Starved Rock Dam, US	daily rain	35.1 mm (1.4 in)	14.3 mm (0.6 in)	56 years	32 of 100 (Routine)
7 April 2003	Utica Starved Rock Dam, US	daily snowfall	2.5 cm (1.0 in)	1.2 cm (0.5 in)	30 years	17 of 100 (Routine)
7 March 2003	Utica Starved Rock Dam, US	daily snow depth	12.7 cm (5.0 in)	2.5 cm (1.0 in)	37 years	21 of 100 (Routine)
6 March 2003	Utica Starved Rock Dam, US	daily snow depth (Tie)	15.2 cm (6.0 in)	tie	24 years	3 of 100 (Routine)
5 March 2003	Utica Starved Rock Dam, US	daily snowfall	14.0 cm (5.5 in)	10.2 cm (4.0 in)	20 years	33 of 100 (Routine)
5 March 2003	Utica Starved Rock Dam, US	daily snow depth (Tie)	15.2 cm (6.0 in)	tie	37 years	4 of 100 (Routine)
15 February 2003	Utica Starved Rock Dam, US	monthly snowfall	15.2 cm (6.0 in)	2.5 cm (1.0 in)	40 years	35 of 100 (Notable)
29 January 2003	Utica Starved Rock Dam, US	daily snowfall	3.8 cm (1.5 in)	2.5 cm (1.0 in)	19 years	15 of 100 (Routine)
27 June 2002	Utica Starved Rock Dam, US	daily rain	22.4 mm (0.9 in)	5.4 mm (0.21 in)	28 years	18 of 100 (Routine)

Extremes by Year

1943 to 2005

Yearly extremes at Utica Starved Rock Dam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1999	33.9 C (93.0 F)	14
Coldest night (TNn)	-31.1 C (-24.0 F)	1999	-20.0 C (-4.0 F)	14
Wettest day (Rx1day)	177.0 mm (7.0 in)	1958	61.5 mm (2.4 in)	63
Wettest five days (Rx5day)	204.4 mm (8.0 in)	1958	101.2 mm (4.0 in)	63
Longest dry spell (CDD)	41 days	1969	23 days	63

Hottest day (TXx)

The hottest day of the year at Utica Starved Rock Dam, 1943 to 2005. The record is 37.8 C (100.0 F) in 1999, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Utica Starved Rock Dam by year
Year	Hottest day (TXx)
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	16.7 C (62.1 F)
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	27.2 C (81.0 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	30.0 C (86.0 F)
1977	36.7 C (98.1 F)
1978	25.6 C (78.1 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	31.1 C (88.0 F)
1998	35.0 C (95.0 F)
1999	37.8 C (100.0 F)
2000	35.0 C (95.0 F)
2001	35.6 C (96.1 F)
2002	35.6 C (96.1 F)
2003	35.0 C (95.0 F)
2004	32.8 C (91.0 F)
2005	16.1 C (61.0 F)

Coldest night (TNn)

The coldest night of the year at Utica Starved Rock Dam, 1943 to 2005. The record is -31.1 C (-24.0 F) in 1999, marked on the chart; the median year is -20.0 C (-4.0 F).

Coldest night (TNn) at Utica Starved Rock Dam by year
Year	Coldest night (TNn)
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	-20.0 C (-4.0 F)
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	-0.6 C (30.9 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	-23.9 C (-11.0 F)
1977	-7.8 C (18.0 F)
1978	-21.1 C (-6.0 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	-10.6 C (12.9 F)
1998	-20.0 C (-4.0 F)
1999	-31.1 C (-24.0 F)
2000	-26.1 C (-15.0 F)
2001	-19.4 C (-2.9 F)
2002	-20.0 C (-4.0 F)
2003	-20.0 C (-4.0 F)
2004	-22.2 C (-8.0 F)
2005	-17.2 C (1.0 F)

Wettest day (Rx1day)

The wettest day of the year at Utica Starved Rock Dam, 1943 to 2005. The record is 177.0 mm (7.0 in) in 1958, marked on the chart; the median year is 61.5 mm (2.4 in).

Wettest day (Rx1day) at Utica Starved Rock Dam by year
Year	Wettest day (Rx1day)
1943	68.8 mm (2.7 in)
1944	63.5 mm (2.5 in)
1945	42.7 mm (1.7 in)
1946	40.6 mm (1.6 in)
1947	55.9 mm (2.2 in)
1948	78.2 mm (3.1 in)
1949	43.9 mm (1.7 in)
1950	58.9 mm (2.3 in)
1951	57.2 mm (2.3 in)
1952	52.8 mm (2.1 in)
1953	80.3 mm (3.2 in)
1954	96.5 mm (3.8 in)
1955	63.0 mm (2.5 in)
1956	53.3 mm (2.1 in)
1957	45.7 mm (1.8 in)
1958	177.0 mm (7.0 in)
1959	49.5 mm (1.9 in)
1960	53.3 mm (2.1 in)
1961	102.1 mm (4.0 in)
1962	81.5 mm (3.2 in)
1963	37.1 mm (1.5 in)
1964	61.5 mm (2.4 in)
1965	66.5 mm (2.6 in)
1966	86.9 mm (3.4 in)
1967	53.3 mm (2.1 in)
1968	82.6 mm (3.3 in)
1969	68.6 mm (2.7 in)
1970	94.7 mm (3.7 in)
1971	38.6 mm (1.5 in)
1972	79.2 mm (3.1 in)
1973	49.5 mm (1.9 in)
1974	86.9 mm (3.4 in)
1975	83.3 mm (3.3 in)
1976	50.0 mm (2.0 in)
1977	74.4 mm (2.9 in)
1978	82.8 mm (3.3 in)
1979	104.1 mm (4.1 in)
1980	56.9 mm (2.2 in)
1981	123.2 mm (4.9 in)
1982	102.9 mm (4.1 in)
1983	57.9 mm (2.3 in)
1984	64.8 mm (2.6 in)
1985	56.6 mm (2.2 in)
1986	54.6 mm (2.1 in)
1987	91.9 mm (3.6 in)
1988	39.1 mm (1.5 in)
1989	74.2 mm (2.9 in)
1990	83.6 mm (3.3 in)
1991	51.3 mm (2.0 in)
1992	86.9 mm (3.4 in)
1993	42.4 mm (1.7 in)
1994	55.9 mm (2.2 in)
1995	51.1 mm (2.0 in)
1996	78.7 mm (3.1 in)
1997	73.2 mm (2.9 in)
1998	60.2 mm (2.4 in)
1999	76.7 mm (3.0 in)
2000	50.8 mm (2.0 in)
2001	57.9 mm (2.3 in)
2002	73.2 mm (2.9 in)
2003	36.3 mm (1.4 in)
2004	42.7 mm (1.7 in)
2005	26.4 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Utica Starved Rock Dam, 1943 to 2005. The record is 204.4 mm (8.0 in) in 1958, marked on the chart; the median year is 101.2 mm (4.0 in).

Wettest five days (Rx5day) at Utica Starved Rock Dam by year
Year	Wettest five days (Rx5day)
1943	75.4 mm (3.0 in)
1944	81.3 mm (3.2 in)
1945	65.0 mm (2.6 in)
1946	72.4 mm (2.9 in)
1947	55.2 mm (2.2 in)
1948	110.7 mm (4.4 in)
1949	75.5 mm (3.0 in)
1950	110.3 mm (4.3 in)
1951	109.3 mm (4.3 in)
1952	75.4 mm (3.0 in)
1953	101.2 mm (4.0 in)
1954	97.5 mm (3.8 in)
1955	69.1 mm (2.7 in)
1956	75.9 mm (3.0 in)
1957	105.1 mm (4.1 in)
1958	204.4 mm (8.0 in)
1959	86.1 mm (3.4 in)
1960	92.7 mm (3.6 in)
1961	199.9 mm (7.9 in)
1962	126.5 mm (5.0 in)
1963	64.8 mm (2.6 in)
1964	104.5 mm (4.1 in)
1965	144.0 mm (5.7 in)
1966	124.7 mm (4.9 in)
1967	95.7 mm (3.8 in)
1968	124.0 mm (4.9 in)
1969	102.2 mm (4.0 in)
1970	130.5 mm (5.1 in)
1971	60.7 mm (2.4 in)
1972	93.4 mm (3.7 in)
1973	60.7 mm (2.4 in)
1974	127.5 mm (5.0 in)
1975	132.0 mm (5.2 in)
1976	99.1 mm (3.9 in)
1977	89.9 mm (3.5 in)
1978	187.0 mm (7.4 in)
1979	184.1 mm (7.2 in)
1980	103.6 mm (4.1 in)
1981	123.5 mm (4.9 in)
1982	118.1 mm (4.6 in)
1983	124.0 mm (4.9 in)
1984	109.3 mm (4.3 in)
1985	102.6 mm (4.0 in)
1986	102.7 mm (4.0 in)
1987	129.7 mm (5.1 in)
1988	55.9 mm (2.2 in)
1989	128.6 mm (5.1 in)
1990	102.4 mm (4.0 in)
1991	105.6 mm (4.2 in)
1992	91.5 mm (3.6 in)
1993	75.7 mm (3.0 in)
1994	62.5 mm (2.5 in)
1995	102.2 mm (4.0 in)
1996	134.6 mm (5.3 in)
1997	89.5 mm (3.5 in)
1998	112.2 mm (4.4 in)
1999	88.6 mm (3.5 in)
2000	68.3 mm (2.7 in)
2001	79.1 mm (3.1 in)
2002	90.5 mm (3.6 in)
2003	98.9 mm (3.9 in)
2004	78.7 mm (3.1 in)
2005	66.5 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Utica Starved Rock Dam, 1943 to 2005. The record is 41 days in 1969, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Utica Starved Rock Dam by year
Year	Longest dry spell (CDD)
1943	24 days
1944	32 days
1945	21 days
1946	31 days
1947	28 days
1948	29 days
1949	22 days
1950	30 days
1951	17 days
1952	33 days
1953	23 days
1954	23 days
1955	24 days
1956	25 days
1957	29 days
1958	34 days
1959	14 days
1960	24 days
1961	19 days
1962	19 days
1963	19 days
1964	36 days
1965	16 days
1966	26 days
1967	23 days
1968	17 days
1969	41 days
1970	12 days
1971	23 days
1972	12 days
1973	17 days
1974	21 days
1975	13 days
1976	27 days
1977	18 days
1978	18 days
1979	26 days
1980	20 days
1981	23 days
1982	18 days
1983	15 days
1984	17 days
1985	11 days
1986	28 days
1987	29 days
1988	31 days
1989	24 days
1990	16 days
1991	30 days
1992	15 days
1993	21 days
1994	23 days
1995	29 days
1996	23 days
1997	19 days
1998	19 days
1999	33 days
2000	18 days
2001	19 days
2002	24 days
2003	17 days
2004	21 days
2005	15 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

60 years, 1944 to 2004

A day with at least 63.4 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 148.3 mm (5.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Utica Starved Rock Dam: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	63.4 mm (2.5 in)
5 years	84.2 mm (3.3 in)
10 years	98.7 mm (3.9 in)
25 years	117.9 mm (4.6 in)
50 years	132.9 mm (5.2 in)
100 years	148.3 mm (5.8 in)	Longer than the 60 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, 60 years of values from 1944 to 2004.

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: 177.0 mm (7.0 in) in 1958; 123.2 mm (4.9 in) in 1981; 104.1 mm (4.1 in) in 1979.

Download the Data

Data for Utica Starved Rock Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Utica Starved Rock Dam 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

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