Shelbyville Dam Weather Records (USC00117876)
Record envelope, standing records and threshold days for Shelbyville Dam (USC00117876), Illinois, United States, with 86 years of record.
Key Facts for Shelbyville Dam
- Shelbyville Dam (USC00117876) is a weather station in Illinois, United States at 39.41 latitude and -88.77 longitude, 198 m (650 ft) above sea level.
- The station reports from 1941 to 2026, 86 years of record.
- 1,464 records set at Shelbyville Dam still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Shelbyville Dam set a daily record high minimum temperature of 17.8 C (64.0 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, 39.41 latitude, -88.77 longitude.
- Elevation: 198 m (650 ft).
- Period of record: 1941 to 2026, 86 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
29 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.0 C (68.0 F) | -29.4 C (-20.9 F) | 18.3 C (64.9 F) | -21.7 C (-7.1 F) |
| Feb | 23.9 C (75.0 F) | -27.8 C (-18.0 F) | 21.1 C (70.0 F) | -17.8 C (0.0 F) |
| Mar | 30.6 C (87.1 F) | -19.4 C (-2.9 F) | 30.6 C (87.1 F) | -10.6 C (12.9 F) |
| Apr | 31.7 C (89.1 F) | -6.1 C (21.0 F) | 28.9 C (84.0 F) | 1.7 C (35.1 F) |
| May | 35.0 C (95.0 F) | -1.1 C (30.0 F) | 29.4 C (84.9 F) | 4.4 C (39.9 F) |
| Jun | 40.0 C (104.0 F) | 6.1 C (43.0 F) | 33.3 C (91.9 F) | 13.3 C (55.9 F) |
| Jul | 39.4 C (102.9 F) | 11.1 C (52.0 F) | 34.4 C (93.9 F) | 13.9 C (57.0 F) |
| Aug | 38.3 C (100.9 F) | 5.6 C (42.1 F) | 35.0 C (95.0 F) | 13.3 C (55.9 F) |
| Sep | 36.7 C (98.1 F) | 0.6 C (33.1 F) | 37.8 C (100.0 F) | 8.9 C (48.0 F) |
| Oct | 33.3 C (91.9 F) | -6.1 C (21.0 F) | 32.8 C (91.0 F) | 8.9 C (48.0 F) |
| Nov | 26.7 C (80.1 F) | -15.6 C (3.9 F) | n/a | n/a |
| Dec | 22.2 C (72.0 F) | -26.1 C (-15.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1973 | 6 |
| 1974 | 1 |
| 1975 | 4 |
| 1976 | 49 |
| 1977 | 58 |
| 1978 | 26 |
| 1979 | 33 |
| 1980 | 6 |
| 1981 | 29 |
| 1982 | 31 |
| 1983 | 54 |
| 1984 | 42 |
| 1985 | 30 |
| 1986 | 34 |
| 1987 | 27 |
| 1988 | 42 |
| 1989 | 11 |
| 1996 | 19 |
| 1997 | 39 |
| 1998 | 29 |
| 1999 | 23 |
| 2000 | 34 |
| 2001 | 32 |
| 2002 | 29 |
| 2003 | 31 |
| 2004 | 32 |
| 2005 | 21 |
| 2006 | 34 |
| 2007 | 46 |
| 2008 | 20 |
| 2009 | 26 |
| 2010 | 26 |
| 2011 | 34 |
| 2012 | 67 |
| 2013 | 32 |
| 2014 | 56 |
| 2015 | 35 |
| 2016 | 21 |
| 2017 | 47 |
| 2018 | 37 |
| 2019 | 36 |
| 2020 | 21 |
| 2021 | 3 |
| 2022 | 26 |
| 2023 | 30 |
| 2024 | 30 |
| 2025 | 34 |
| 2026 | 31 |
Wettest Day of Each Month
Jul: 132.1 mm (5.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 88.9 mm (3.5 in) | 11 January 2020 |
| Feb | 72.4 mm (2.9 in) | 21 February 2018 |
| Mar | 62.2 mm (2.4 in) | 31 March 2022 |
| Apr | 86.9 mm (3.4 in) | 19 April 2013 |
| May | 85.9 mm (3.4 in) | 26 May 2011 |
| Jun | 102.4 mm (4.0 in) | 9 June 2026 |
| Jul | 132.1 mm (5.2 in) | 28 July 1979 |
| Aug | 77.7 mm (3.1 in) | 16 August 2016 |
| Sep | 101.6 mm (4.0 in) | 1 September 2003 |
| Oct | 116.3 mm (4.6 in) | 5 October 2000 |
| Nov | 66.3 mm (2.6 in) | 25 November 2010 |
| Dec | 113.8 mm (4.5 in) | 27 December 2015 |
Period of Record Coverage
1973 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1973 | 61 | 17% | No |
| 1974 | 28 | 8% | No |
| 1975 | 60 | 16% | No |
| 1976 | 294 | 80% | No |
| 1977 | 323 | 88% | No |
| 1978 | 324 | 89% | No |
| 1979 | 345 | 95% | Yes |
| 1980 | 53 | 14% | No |
| 1981 | 352 | 96% | Yes |
| 1982 | 312 | 85% | No |
| 1983 | 319 | 87% | No |
| 1984 | 338 | 92% | Yes |
| 1985 | 347 | 95% | Yes |
| 1986 | 267 | 73% | No |
| 1987 | 273 | 75% | No |
| 1988 | 323 | 88% | No |
| 1989 | 74 | 20% | No |
| 1996 | 173 | 47% | No |
| 1997 | 336 | 92% | Yes |
| 1998 | 330 | 90% | Yes |
| 1999 | 319 | 87% | No |
| 2000 | 324 | 89% | No |
| 2001 | 343 | 94% | Yes |
| 2002 | 362 | 99% | Yes |
| 2003 | 361 | 99% | Yes |
| 2004 | 333 | 91% | Yes |
| 2005 | 358 | 98% | Yes |
| 2006 | 357 | 98% | Yes |
| 2007 | 349 | 96% | Yes |
| 2008 | 319 | 87% | No |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 334 | 92% | Yes |
| 2016 | 334 | 91% | Yes |
| 2017 | 364 | 100% | Yes |
| 2018 | 333 | 91% | Yes |
| 2019 | 347 | 95% | Yes |
| 2020 | 283 | 77% | No |
| 2021 | 120 | 33% | No |
| 2022 | 354 | 97% | Yes |
| 2023 | 357 | 98% | Yes |
| 2024 | 362 | 99% | Yes |
| 2025 | 363 | 99% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 October 2026 | Shelbyville Dam, US | daily high min (Provisional) | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 52 years | 22 of 100 (Routine) |
| 13 October 2026 | Shelbyville Dam, US | daily high max (Provisional) | 32.8 C (91.0 F) | 3.4 C (6.1 F) | 1 year | 10 of 100 (Routine) |
| 10 October 2026 | Shelbyville Dam, US | daily high max (Provisional) | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 16 years | 10 of 100 (Routine) |
| 20 September 2026 | Shelbyville Dam, US | daily high max (Provisional) | 34.4 C (93.9 F) | 1.6 C (2.9 F) | 48 years | 22 of 100 (Routine) |
| 20 September 2026 | Shelbyville Dam, US | daily high min (Provisional) | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 24 years | 13 of 100 (Routine) |
| 19 September 2026 | Shelbyville Dam, US | daily high min (Provisional) | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 48 years | 20 of 100 (Routine) |
| 18 September 2026 | Shelbyville Dam, US | daily high max (Provisional) | 35.6 C (96.1 F) | 2.3 C (4.1 F) | 43 years | 22 of 100 (Routine) |
| 18 September 2026 | Shelbyville Dam, US | daily high min (Provisional) | 22.8 C (73.0 F) | 0.6 C (1.1 F) | 48 years | 20 of 100 (Routine) |
| 17 September 2026 | Shelbyville Dam, US | daily high max (Provisional) | 35.0 C (95.0 F) | 1.7 C (3.1 F) | 8 years | 10 of 100 (Routine) |
| 17 September 2026 | Shelbyville Dam, US | daily high min (Provisional) | 21.1 C (70.0 F) | 1.1 C (2.0 F) | 9 years | 9 of 100 (Routine) |
| 16 September 2026 | Shelbyville Dam, US | monthly high max (Tie, Provisional) | 37.8 C (100.0 F) | tie | 0 years | 3 of 100 (Routine) |
| 6 September 2026 | Shelbyville Dam, US | daily high max (Provisional) | 37.2 C (99.0 F) | 1.1 C (2.0 F) | 27 years | 15 of 100 (Routine) |
| 6 September 2026 | Shelbyville Dam, US | daily high min (Tie, Provisional) | 22.2 C (72.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 5 September 2026 | Shelbyville Dam, US | daily high min (Provisional) | 23.3 C (73.9 F) | 1.6 C (2.9 F) | 40 years | 20 of 100 (Routine) |
| 5 September 2026 | Shelbyville Dam, US | monthly high max (Tie, Provisional) | 37.8 C (100.0 F) | tie | 0 years | 3 of 100 (Routine) |
| 4 September 2026 | Shelbyville Dam, US | monthly high min (Provisional) | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 0 years | 16 of 100 (Routine) |
| 4 September 2026 | Shelbyville Dam, US | daily high max (Provisional) | 37.2 C (99.0 F) | 1.1 C (2.0 F) | 19 years | 12 of 100 (Routine) |
| 3 September 2026 | Shelbyville Dam, US | monthly high max (Provisional) | 37.8 C (100.0 F) | 0.6 C (1.1 F) | 0 years | 16 of 100 (Routine) |
| 3 September 2026 | Shelbyville Dam, US | monthly high min (Tie, Provisional) | 23.3 C (73.9 F) | tie | 0 years | 3 of 100 (Routine) |
| 2 September 2026 | Shelbyville Dam, US | monthly high min (Provisional) | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 40 years | 28 of 100 (Routine) |
Climate Trend
23 complete years, 1979 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1979 | 9.9 C | -2.18 C |
| 1981 | 11.6 C | -0.45 C |
| 1985 | 11.1 C | -0.97 C |
| 1988 | 12.0 C | -0.04 C |
| 1997 | 11.0 C | -1.07 C |
| 2001 | 12.3 C | +0.27 C |
| 2002 | 12.2 C | +0.12 C |
| 2003 | 11.4 C | -0.69 C |
| 2005 | 12.8 C | +0.71 C |
| 2006 | 12.8 C | +0.74 C |
| 2007 | 13.0 C | +0.91 C |
| 2009 | 11.5 C | -0.58 C |
| 2010 | 12.1 C | +0.02 C |
| 2011 | 12.3 C | +0.23 C |
| 2012 | 14.0 C | +1.90 C |
| 2013 | 11.2 C | -0.81 C |
| 2014 | 10.2 C | -1.88 C |
| 2017 | 13.3 C | +1.24 C |
| 2019 | 11.8 C | -0.24 C |
| 2022 | 11.5 C | -0.51 C |
| 2023 | 13.4 C | +1.30 C |
| 2024 | 13.5 C | +1.40 C |
| 2025 | 12.6 C | +0.58 C |
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1941 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1988 | 36.1 C (97.0 F) | 48 |
| Coldest night (TNn) | -29.4 C (-20.9 F) | 1977 | -20.8 C (-5.5 F) | 48 |
| Wettest day (Rx1day) | 132.1 mm (5.2 in) | 1979 | 62.0 mm (2.4 in) | 55 |
| Wettest five days (Rx5day) | 215.2 mm (8.5 in) | 1979 | 90.7 mm (3.6 in) | 55 |
| Longest dry spell (CDD) | 34 days | 2025 | 19 days | 55 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1941 | n/a |
| 1942 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1973 | 32.2 C (90.0 F) |
| 1974 | 25.0 C (77.0 F) |
| 1975 | 31.7 C (89.1 F) |
| 1976 | 37.2 C (99.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 36.7 C (98.1 F) |
| 1980 | 30.6 C (87.1 F) |
| 1981 | 36.1 C (97.0 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 38.3 C (100.9 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 36.1 C (97.0 F) |
| 1987 | 38.3 C (100.9 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 30.6 C (87.1 F) |
| 1996 | 35.6 C (96.1 F) |
| 1997 | 36.1 C (97.0 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 38.3 C (100.9 F) |
| 2000 | 35.6 C (96.1 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 36.7 C (98.1 F) |
| 2003 | 37.2 C (99.0 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 37.2 C (99.0 F) |
| 2006 | 36.1 C (97.0 F) |
| 2007 | 37.2 C (99.0 F) |
| 2008 | 33.9 C (93.0 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 36.1 C (97.0 F) |
| 2014 | 34.4 C (93.9 F) |
| 2015 | 35.0 C (95.0 F) |
| 2016 | 35.0 C (95.0 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 35.0 C (95.0 F) |
| 2019 | 34.4 C (93.9 F) |
| 2020 | 33.9 C (93.0 F) |
| 2021 | 32.2 C (90.0 F) |
| 2022 | 37.2 C (99.0 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 36.1 C (97.0 F) |
| 2025 | 36.1 C (97.0 F) |
| 2026 | 37.8 C (100.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1941 | n/a |
| 1942 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1973 | 1.1 C (34.0 F) |
| 1974 | -2.2 C (28.0 F) |
| 1975 | -7.8 C (18.0 F) |
| 1976 | -21.7 C (-7.1 F) |
| 1977 | -29.4 C (-20.9 F) |
| 1978 | -22.2 C (-8.0 F) |
| 1979 | -26.7 C (-16.1 F) |
| 1980 | -16.7 C (1.9 F) |
| 1981 | -23.3 C (-9.9 F) |
| 1982 | -28.9 C (-20.0 F) |
| 1983 | -26.1 C (-15.0 F) |
| 1984 | -25.0 C (-13.0 F) |
| 1985 | -29.4 C (-20.9 F) |
| 1986 | -21.7 C (-7.1 F) |
| 1987 | -24.4 C (-11.9 F) |
| 1988 | -21.7 C (-7.1 F) |
| 1989 | -19.4 C (-2.9 F) |
| 1996 | -14.4 C (6.1 F) |
| 1997 | -21.7 C (-7.1 F) |
| 1998 | -16.1 C (3.0 F) |
| 1999 | -26.1 C (-15.0 F) |
| 2000 | -20.6 C (-5.1 F) |
| 2001 | -18.3 C (-0.9 F) |
| 2002 | -16.1 C (3.0 F) |
| 2003 | -20.0 C (-4.0 F) |
| 2004 | -22.8 C (-9.0 F) |
| 2005 | -20.0 C (-4.0 F) |
| 2006 | -16.1 C (3.0 F) |
| 2007 | -20.0 C (-4.0 F) |
| 2008 | -18.3 C (-0.9 F) |
| 2009 | -22.2 C (-8.0 F) |
| 2010 | -21.1 C (-6.0 F) |
| 2011 | -18.9 C (-2.0 F) |
| 2012 | -12.8 C (9.0 F) |
| 2013 | -16.1 C (3.0 F) |
| 2014 | -28.3 C (-18.9 F) |
| 2015 | -23.3 C (-9.9 F) |
| 2016 | -17.8 C (0.0 F) |
| 2017 | -19.4 C (-2.9 F) |
| 2018 | -22.8 C (-9.0 F) |
| 2019 | -24.4 C (-11.9 F) |
| 2020 | -17.2 C (1.0 F) |
| 2021 | -7.8 C (18.0 F) |
| 2022 | -22.8 C (-9.0 F) |
| 2023 | -13.3 C (8.1 F) |
| 2024 | -23.3 C (-9.9 F) |
| 2025 | -20.0 C (-4.0 F) |
| 2026 | -21.7 C (-7.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1941 | 66.0 mm (2.6 in) |
| 1942 | 43.4 mm (1.7 in) |
| 1951 | 90.4 mm (3.6 in) |
| 1952 | 45.7 mm (1.8 in) |
| 1953 | 71.6 mm (2.8 in) |
| 1954 | 35.8 mm (1.4 in) |
| 1955 | 57.4 mm (2.3 in) |
| 1973 | 62.0 mm (2.4 in) |
| 1974 | 16.8 mm (0.7 in) |
| 1975 | 39.9 mm (1.6 in) |
| 1976 | 42.4 mm (1.7 in) |
| 1977 | 61.5 mm (2.4 in) |
| 1978 | 70.6 mm (2.8 in) |
| 1979 | 132.1 mm (5.2 in) |
| 1980 | 11.9 mm (0.5 in) |
| 1981 | 57.4 mm (2.3 in) |
| 1982 | 77.5 mm (3.1 in) |
| 1983 | 57.2 mm (2.3 in) |
| 1984 | 42.7 mm (1.7 in) |
| 1985 | 69.1 mm (2.7 in) |
| 1986 | 45.0 mm (1.8 in) |
| 1987 | 49.8 mm (2.0 in) |
| 1988 | 65.0 mm (2.6 in) |
| 1989 | 29.2 mm (1.1 in) |
| 1996 | 51.1 mm (2.0 in) |
| 1997 | 54.6 mm (2.1 in) |
| 1998 | 71.6 mm (2.8 in) |
| 1999 | 58.7 mm (2.3 in) |
| 2000 | 116.3 mm (4.6 in) |
| 2001 | 60.7 mm (2.4 in) |
| 2002 | 62.2 mm (2.4 in) |
| 2003 | 101.6 mm (4.0 in) |
| 2004 | 45.0 mm (1.8 in) |
| 2005 | 48.8 mm (1.9 in) |
| 2006 | 50.8 mm (2.0 in) |
| 2007 | 48.8 mm (1.9 in) |
| 2008 | 50.8 mm (2.0 in) |
| 2009 | 55.9 mm (2.2 in) |
| 2010 | 82.0 mm (3.2 in) |
| 2011 | 85.9 mm (3.4 in) |
| 2012 | 54.1 mm (2.1 in) |
| 2013 | 86.9 mm (3.4 in) |
| 2014 | 84.3 mm (3.3 in) |
| 2015 | 113.8 mm (4.5 in) |
| 2016 | 77.7 mm (3.1 in) |
| 2017 | 83.8 mm (3.3 in) |
| 2018 | 72.4 mm (2.9 in) |
| 2019 | 71.6 mm (2.8 in) |
| 2020 | 90.2 mm (3.6 in) |
| 2021 | 67.8 mm (2.7 in) |
| 2022 | 71.1 mm (2.8 in) |
| 2023 | 47.8 mm (1.9 in) |
| 2024 | 73.9 mm (2.9 in) |
| 2025 | 68.6 mm (2.7 in) |
| 2026 | 102.4 mm (4.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1941 | 146.0 mm (5.7 in) |
| 1942 | 43.4 mm (1.7 in) |
| 1951 | 105.0 mm (4.1 in) |
| 1952 | 71.6 mm (2.8 in) |
| 1953 | 77.4 mm (3.0 in) |
| 1954 | 56.9 mm (2.2 in) |
| 1955 | 60.4 mm (2.4 in) |
| 1973 | 101.8 mm (4.0 in) |
| 1974 | 27.2 mm (1.1 in) |
| 1975 | 45.9 mm (1.8 in) |
| 1976 | 55.6 mm (2.2 in) |
| 1977 | 61.8 mm (2.4 in) |
| 1978 | 91.9 mm (3.6 in) |
| 1979 | 215.2 mm (8.5 in) |
| 1980 | 27.5 mm (1.1 in) |
| 1981 | 77.2 mm (3.0 in) |
| 1982 | 102.3 mm (4.0 in) |
| 1983 | 137.4 mm (5.4 in) |
| 1984 | 81.0 mm (3.2 in) |
| 1985 | 88.6 mm (3.5 in) |
| 1986 | 82.0 mm (3.2 in) |
| 1987 | 58.9 mm (2.3 in) |
| 1988 | 73.9 mm (2.9 in) |
| 1989 | 45.7 mm (1.8 in) |
| 1996 | 68.9 mm (2.7 in) |
| 1997 | 70.2 mm (2.8 in) |
| 1998 | 85.8 mm (3.4 in) |
| 1999 | 85.9 mm (3.4 in) |
| 2000 | 127.2 mm (5.0 in) |
| 2001 | 110.5 mm (4.4 in) |
| 2002 | 119.6 mm (4.7 in) |
| 2003 | 143.0 mm (5.6 in) |
| 2004 | 83.1 mm (3.3 in) |
| 2005 | 113.5 mm (4.5 in) |
| 2006 | 91.4 mm (3.6 in) |
| 2007 | 72.4 mm (2.9 in) |
| 2008 | 103.6 mm (4.1 in) |
| 2009 | 85.1 mm (3.4 in) |
| 2010 | 106.2 mm (4.2 in) |
| 2011 | 98.1 mm (3.9 in) |
| 2012 | 98.1 mm (3.9 in) |
| 2013 | 130.6 mm (5.1 in) |
| 2014 | 87.9 mm (3.5 in) |
| 2015 | 171.0 mm (6.7 in) |
| 2016 | 129.3 mm (5.1 in) |
| 2017 | 166.6 mm (6.6 in) |
| 2018 | 95.9 mm (3.8 in) |
| 2019 | 93.8 mm (3.7 in) |
| 2020 | 139.1 mm (5.5 in) |
| 2021 | 135.4 mm (5.3 in) |
| 2022 | 172.4 mm (6.8 in) |
| 2023 | 74.7 mm (2.9 in) |
| 2024 | 76.7 mm (3.0 in) |
| 2025 | 90.7 mm (3.6 in) |
| 2026 | 127.8 mm (5.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1941 | 17 days |
| 1942 | 30 days |
| 1951 | 14 days |
| 1952 | 25 days |
| 1953 | 24 days |
| 1954 | 17 days |
| 1955 | 9 days |
| 1973 | 14 days |
| 1974 | 11 days |
| 1975 | 9 days |
| 1976 | 24 days |
| 1977 | 14 days |
| 1978 | 18 days |
| 1979 | 27 days |
| 1980 | 12 days |
| 1981 | 24 days |
| 1982 | 11 days |
| 1983 | 21 days |
| 1984 | 13 days |
| 1985 | 20 days |
| 1986 | 30 days |
| 1987 | 18 days |
| 1988 | 31 days |
| 1989 | 19 days |
| 1996 | 26 days |
| 1997 | 16 days |
| 1998 | 14 days |
| 1999 | 19 days |
| 2000 | 15 days |
| 2001 | 23 days |
| 2002 | 26 days |
| 2003 | 23 days |
| 2004 | 20 days |
| 2005 | 20 days |
| 2006 | 16 days |
| 2007 | 17 days |
| 2008 | 18 days |
| 2009 | 16 days |
| 2010 | 19 days |
| 2011 | 20 days |
| 2012 | 32 days |
| 2013 | 19 days |
| 2014 | 18 days |
| 2015 | 26 days |
| 2016 | 23 days |
| 2017 | 22 days |
| 2018 | 13 days |
| 2019 | 22 days |
| 2020 | 21 days |
| 2021 | 12 days |
| 2022 | 13 days |
| 2023 | 21 days |
| 2024 | 32 days |
| 2025 | 34 days |
| 2026 | 19 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
23 years with a frostAcross 23 years with a frost, the median last spring frost at Shelbyville Dam falls on 10 April and the median first autumn frost on 22 October, which leaves a median of 191 days between them.
| Measure | Median, all years | Earliest period | Recent period (1979 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 10 April | n/a | 10 April | n/a | n/a |
| First autumn frost | 22 October | n/a | 22 October | n/a | n/a |
| Growing days | 191 days | n/a | 191 days | n/a | n/a |
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
36 years, 1941 to 2025A day with at least 65.9 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 147.0 mm (5.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 65.9 mm (2.6 in) | |
| 5 years | 84.5 mm (3.3 in) | |
| 10 years | 98.0 mm (3.9 in) | |
| 25 years | 116.4 mm (4.6 in) | |
| 50 years | 131.3 mm (5.2 in) | Longer than the 36 years of record |
| 100 years | 147.0 mm (5.8 in) | Longer than the 36 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, 36 years of values from 1941 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: 132.1 mm (5.2 in) in 1979; 116.3 mm (4.6 in) in 2000; 113.8 mm (4.5 in) in 2015.
Download the Data
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).