Hannibal Locks & Dam Weather Records (USC00333500)
Record envelope, standing records and threshold days for Hannibal Locks & Dam (USC00333500), Ohio, United States, with 52 years of record.
Key Facts for Hannibal Locks & Dam
- Hannibal Locks & Dam (USC00333500) is a weather station in Ohio, United States at 39.67 latitude and -80.87 longitude, 189 m (620 ft) above sea level.
- The station reports from 1975 to 2026, 52 years of record.
- 1,464 records set at Hannibal Locks & Dam still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Hannibal Locks & Dam set a daily record precipitation of 45.7 mm (1.8 in) on 11 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Ohio, United States, 39.67 latitude, -80.87 longitude.
- Elevation: 189 m (620 ft).
- Period of record: 1975 to 2026, 52 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
16 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 22.8 C (73.0 F) | -31.1 C (-24.0 F) | 16.7 C (62.1 F) | -21.1 C (-6.0 F) |
| Feb | 24.4 C (75.9 F) | -23.9 C (-11.0 F) | 17.8 C (64.0 F) | -21.7 C (-7.1 F) |
| Mar | 29.4 C (84.9 F) | -22.2 C (-8.0 F) | 29.4 C (84.9 F) | -8.9 C (16.0 F) |
| Apr | 32.2 C (90.0 F) | -7.8 C (18.0 F) | 29.4 C (84.9 F) | -2.8 C (27.0 F) |
| May | 33.3 C (91.9 F) | -3.3 C (26.1 F) | 31.1 C (88.0 F) | 1.1 C (34.0 F) |
| Jun | 36.1 C (97.0 F) | 3.3 C (37.9 F) | 31.1 C (88.0 F) | 7.8 C (46.0 F) |
| Jul | 38.3 C (100.9 F) | 5.6 C (42.1 F) | 34.4 C (93.9 F) | 11.7 C (53.1 F) |
| Aug | 37.8 C (100.0 F) | 5.6 C (42.1 F) | 31.7 C (89.1 F) | 13.3 C (55.9 F) |
| Sep | 35.0 C (95.0 F) | 1.1 C (34.0 F) | 32.8 C (91.0 F) | 6.1 C (43.0 F) |
| Oct | 32.8 C (91.0 F) | -5.6 C (21.9 F) | 28.3 C (82.9 F) | 5.0 C (41.0 F) |
| Nov | 26.7 C (80.1 F) | -14.4 C (6.1 F) | n/a | n/a |
| Dec | 23.3 C (73.9 F) | -25.6 C (-14.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1975 | 16 |
| 1976 | 54 |
| 1977 | 54 |
| 1978 | 29 |
| 1979 | 47 |
| 1980 | 38 |
| 1981 | 27 |
| 1982 | 47 |
| 1983 | 38 |
| 1984 | 39 |
| 1985 | 36 |
| 1986 | 49 |
| 1987 | 27 |
| 1988 | 46 |
| 1989 | 36 |
| 1990 | 36 |
| 1991 | 39 |
| 1992 | 25 |
| 1993 | 31 |
| 1994 | 19 |
| 1995 | 23 |
| 1996 | 26 |
| 1997 | 15 |
| 1998 | 22 |
| 1999 | 22 |
| 2000 | 27 |
| 2001 | 23 |
| 2002 | 32 |
| 2003 | 16 |
| 2004 | 17 |
| 2005 | 20 |
| 2006 | 14 |
| 2007 | 33 |
| 2008 | 20 |
| 2009 | 22 |
| 2010 | 23 |
| 2011 | 19 |
| 2012 | 42 |
| 2013 | 14 |
| 2014 | 27 |
| 2015 | 36 |
| 2016 | 24 |
| 2017 | 33 |
| 2018 | 34 |
| 2019 | 12 |
| 2020 | 20 |
| 2021 | 16 |
| 2022 | 16 |
| 2023 | 14 |
| 2024 | 30 |
| 2025 | 16 |
| 2026 | 23 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 2012-07-08 | Record high maximum temperature | Record high maximum temperature 38.3 C (100.9 F) |
Wettest Day of Each Month
Sep: 108.7 mm (4.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 72.1 mm (2.8 in) | 12 January 2005 |
| Feb | 62.2 mm (2.4 in) | 14 February 2000 |
| Mar | 87.6 mm (3.4 in) | 2 March 1997 |
| Apr | 64.3 mm (2.5 in) | 4 April 2018 |
| May | 69.3 mm (2.7 in) | 3 May 2010 |
| Jun | 92.2 mm (3.6 in) | 23 June 2018 |
| Jul | 85.3 mm (3.4 in) | 14 July 2010 |
| Aug | 82.0 mm (3.2 in) | 6 August 2007 |
| Sep | 108.7 mm (4.3 in) | 9 September 2004 |
| Oct | 59.4 mm (2.3 in) | 21 October 2016 |
| Nov | 88.1 mm (3.5 in) | 5 November 1985 |
| Dec | 86.4 mm (3.4 in) | 3 December 1991 |
Period of Record Coverage
1975 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1975 | 209 | 57% | No |
| 1976 | 362 | 99% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 352 | 96% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 363 | 99% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 363 | 99% | Yes |
| 1983 | 337 | 92% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 360 | 98% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 361 | 99% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 362 | 99% | Yes |
| 1994 | 361 | 99% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 358 | 98% | Yes |
| 1998 | 363 | 99% | Yes |
| 1999 | 362 | 99% | Yes |
| 2000 | 365 | 100% | Yes |
| 2001 | 363 | 99% | Yes |
| 2002 | 361 | 99% | Yes |
| 2003 | 363 | 99% | Yes |
| 2004 | 364 | 99% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 363 | 99% | Yes |
| 2007 | 361 | 99% | Yes |
| 2008 | 363 | 99% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 360 | 98% | Yes |
| 2013 | 363 | 99% | Yes |
| 2014 | 363 | 99% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 364 | 100% | Yes |
| 2018 | 363 | 99% | Yes |
| 2019 | 364 | 100% | Yes |
| 2020 | 364 | 99% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 364 | 99% | Yes |
| 2025 | 363 | 99% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 October 2026 | Hannibal Locks & Dam, US | daily rain (Provisional) | 45.7 mm (1.8 in) | 35.5 mm (1.4 in) | 12 years | 48 of 100 (Notable) |
| 21 September 2026 | Hannibal Locks & Dam, US | daily rain (Provisional) | 38.6 mm (1.5 in) | 13.5 mm (0.5 in) | 28 years | 22 of 100 (Routine) |
| 18 September 2026 | Hannibal Locks & Dam, US | daily high max (Tie, Provisional) | 29.4 C (84.9 F) | tie | 4 years | 1 of 100 (Routine) |
| 18 September 2026 | Hannibal Locks & Dam, US | daily high min (Tie, Provisional) | 19.4 C (66.9 F) | tie | 8 years | 1 of 100 (Routine) |
| 15 September 2026 | Hannibal Locks & Dam, US | daily low max (Tie, Provisional) | 19.4 C (66.9 F) | tie | 51 years | 5 of 100 (Routine) |
| 6 September 2026 | Hannibal Locks & Dam, US | daily rain (Provisional) | 30.5 mm (1.2 in) | 3.3 mm (0.13 in) | 15 years | 11 of 100 (Routine) |
| 9 August 2026 | Hannibal Locks & Dam, US | daily rain | 27.7 mm (1.1 in) | 8.1 mm (0.32 in) | 12 years | 14 of 100 (Routine) |
| 23 July 2026 | Hannibal Locks & Dam, US | daily low min (Tie) | 11.7 C (53.1 F) | tie | 19 years | 2 of 100 (Routine) |
| 11 July 2026 | Hannibal Locks & Dam, US | daily high min (Tie) | 21.1 C (70.0 F) | tie | 36 years | 3 of 100 (Routine) |
| 4 July 2026 | Hannibal Locks & Dam, US | daily high min | 21.7 C (71.1 F) | 0.6 C (1.1 F) | 27 years | 15 of 100 (Routine) |
| 4 July 2026 | Hannibal Locks & Dam, US | daily high max | 34.4 C (93.9 F) | 1.1 C (2.0 F) | 13 years | 12 of 100 (Routine) |
| 11 June 2026 | Hannibal Locks & Dam, US | daily high min | 21.1 C (70.0 F) | 1.7 C (3.1 F) | 32 years | 18 of 100 (Routine) |
| 10 June 2026 | Hannibal Locks & Dam, US | daily high min | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 17 years | 11 of 100 (Routine) |
| 28 May 2026 | Hannibal Locks & Dam, US | daily rain | 25.4 mm (1.0 in) | 2.5 mm (0.10 in) | 7 years | 9 of 100 (Routine) |
| 20 May 2026 | Hannibal Locks & Dam, US | daily high max (Tie) | 31.1 C (88.0 F) | tie | 29 years | 3 of 100 (Routine) |
| 19 May 2026 | Hannibal Locks & Dam, US | daily high max (Tie) | 31.1 C (88.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 17 April 2026 | Hannibal Locks & Dam, US | daily high min (Tie) | 11.7 C (53.1 F) | tie | 28 years | 3 of 100 (Routine) |
| 16 April 2026 | Hannibal Locks & Dam, US | daily high min | 13.9 C (57.0 F) | 1.7 C (3.1 F) | 24 years | 15 of 100 (Routine) |
| 16 April 2026 | Hannibal Locks & Dam, US | daily high max | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 16 years | 10 of 100 (Routine) |
| 15 April 2026 | Hannibal Locks & Dam, US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 20 years | 12 of 100 (Routine) |
Climate Trend
48 complete years, 1976 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1976 | 10.4 C | -0.86 C |
| 1977 | 10.9 C | -0.36 C |
| 1979 | 9.9 C | -1.39 C |
| 1980 | 10.5 C | -0.74 C |
| 1981 | 10.3 C | -0.98 C |
| 1982 | 10.9 C | -0.32 C |
| 1984 | 10.9 C | -0.36 C |
| 1985 | 11.0 C | -0.30 C |
| 1986 | 11.3 C | +0.03 C |
| 1987 | 11.7 C | +0.45 C |
| 1988 | 10.5 C | -0.76 C |
| 1989 | 10.2 C | -1.02 C |
| 1990 | 12.0 C | +0.70 C |
| 1991 | 12.3 C | +1.00 C |
| 1992 | 10.7 C | -0.57 C |
| 1993 | 11.0 C | -0.25 C |
| 1994 | 10.9 C | -0.40 C |
| 1995 | 10.7 C | -0.52 C |
| 1996 | 10.3 C | -0.94 C |
| 1997 | 10.7 C | -0.58 C |
| 1998 | 12.4 C | +1.17 C |
| 1999 | 11.7 C | +0.44 C |
| 2000 | 10.9 C | -0.39 C |
| 2001 | 11.6 C | +0.33 C |
| 2002 | 11.8 C | +0.55 C |
| 2003 | 10.8 C | -0.50 C |
| 2004 | 11.4 C | +0.17 C |
| 2005 | 11.6 C | +0.36 C |
| 2006 | 11.7 C | +0.47 C |
| 2007 | 11.8 C | +0.50 C |
| 2008 | 11.1 C | -0.16 C |
| 2009 | 11.0 C | -0.25 C |
| 2010 | 11.4 C | +0.12 C |
| 2011 | 11.9 C | +0.66 C |
| 2012 | 12.6 C | +1.37 C |
| 2013 | 11.2 C | -0.09 C |
| 2014 | 10.7 C | -0.58 C |
| 2015 | 11.3 C | -0.01 C |
| 2016 | 12.1 C | +0.81 C |
| 2017 | 11.9 C | +0.63 C |
| 2018 | 11.3 C | +0.02 C |
| 2019 | 11.7 C | +0.41 C |
| 2020 | 11.7 C | +0.39 C |
| 2021 | 11.6 C | +0.33 C |
| 2022 | 10.7 C | -0.57 C |
| 2023 | 11.8 C | +0.50 C |
| 2024 | 12.7 C | +1.45 C |
| 2025 | 11.2 C | -0.06 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1976 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 48 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1976 to 2025 | 48 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.1 to 0.6) per decade | 1976 to 2025 | 48 | Rise |
| Mean daily minimum | 0.3 C (0.1 to 0.4) per decade | 0.5 F (0.2 to 0.7) per decade | 1976 to 2025 | 48 | Rise |
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
1975 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.3 C (100.9 F) | 2012 | 34.2 C (93.5 F) | 52 |
| Coldest night (TNn) | -31.1 C (-24.0 F) | 1994 | -18.9 C (-2.0 F) | 52 |
| Wettest day (Rx1day) | 108.7 mm (4.3 in) | 2004 | 55.0 mm (2.2 in) | 52 |
| Wettest five days (Rx5day) | 148.0 mm (5.8 in) | 2018 | 88.2 mm (3.5 in) | 52 |
| Longest dry spell (CDD) | 29 days | 1991 | 17 days | 52 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1975 | 33.9 C (93.0 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 35.6 C (96.1 F) |
| 1978 | 34.4 C (93.9 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 35.0 C (95.0 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 33.3 C (91.9 F) |
| 1983 | 36.7 C (98.1 F) |
| 1984 | 32.2 C (90.0 F) |
| 1985 | 32.8 C (91.0 F) |
| 1986 | 32.8 C (91.0 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 37.8 C (100.0 F) |
| 1989 | 36.1 C (97.0 F) |
| 1990 | 35.0 C (95.0 F) |
| 1991 | 33.9 C (93.0 F) |
| 1992 | 31.1 C (88.0 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 35.0 C (95.0 F) |
| 1996 | 31.7 C (89.1 F) |
| 1997 | 33.9 C (93.0 F) |
| 1998 | 33.9 C (93.0 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 31.7 C (89.1 F) |
| 2001 | 32.8 C (91.0 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 32.8 C (91.0 F) |
| 2004 | 31.1 C (88.0 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 34.4 C (93.9 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 32.8 C (91.0 F) |
| 2009 | 33.3 C (91.9 F) |
| 2010 | 34.4 C (93.9 F) |
| 2011 | 35.6 C (96.1 F) |
| 2012 | 38.3 C (100.9 F) |
| 2013 | 33.9 C (93.0 F) |
| 2014 | 32.8 C (91.0 F) |
| 2015 | 32.8 C (91.0 F) |
| 2016 | 34.4 C (93.9 F) |
| 2017 | 31.7 C (89.1 F) |
| 2018 | 35.6 C (96.1 F) |
| 2019 | 32.8 C (91.0 F) |
| 2020 | 34.4 C (93.9 F) |
| 2021 | 33.9 C (93.0 F) |
| 2022 | 33.9 C (93.0 F) |
| 2023 | 31.7 C (89.1 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 35.0 C (95.0 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1975 | -14.4 C (6.1 F) |
| 1976 | -23.9 C (-11.0 F) |
| 1977 | -30.0 C (-22.0 F) |
| 1978 | -21.1 C (-6.0 F) |
| 1979 | -23.3 C (-9.9 F) |
| 1980 | -22.2 C (-8.0 F) |
| 1981 | -23.3 C (-9.9 F) |
| 1982 | -25.6 C (-14.1 F) |
| 1983 | -22.8 C (-9.0 F) |
| 1984 | -25.6 C (-14.1 F) |
| 1985 | -25.6 C (-14.1 F) |
| 1986 | -17.2 C (1.0 F) |
| 1987 | -18.3 C (-0.9 F) |
| 1988 | -18.3 C (-0.9 F) |
| 1989 | -25.6 C (-14.1 F) |
| 1990 | -15.0 C (5.0 F) |
| 1991 | -14.4 C (6.1 F) |
| 1992 | -17.8 C (0.0 F) |
| 1993 | -18.3 C (-0.9 F) |
| 1994 | -31.1 C (-24.0 F) |
| 1995 | -21.1 C (-6.0 F) |
| 1996 | -22.2 C (-8.0 F) |
| 1997 | -18.3 C (-0.9 F) |
| 1998 | -12.2 C (10.0 F) |
| 1999 | -17.2 C (1.0 F) |
| 2000 | -19.4 C (-2.9 F) |
| 2001 | -15.6 C (3.9 F) |
| 2002 | -14.4 C (6.1 F) |
| 2003 | -20.6 C (-5.1 F) |
| 2004 | -18.9 C (-2.0 F) |
| 2005 | -17.2 C (1.0 F) |
| 2006 | -15.6 C (3.9 F) |
| 2007 | -21.7 C (-7.1 F) |
| 2008 | -15.6 C (3.9 F) |
| 2009 | -21.1 C (-6.0 F) |
| 2010 | -16.1 C (3.0 F) |
| 2011 | -18.9 C (-2.0 F) |
| 2012 | -11.7 C (10.9 F) |
| 2013 | -14.4 C (6.1 F) |
| 2014 | -23.9 C (-11.0 F) |
| 2015 | -22.8 C (-9.0 F) |
| 2016 | -18.3 C (-0.9 F) |
| 2017 | -18.3 C (-0.9 F) |
| 2018 | -21.1 C (-6.0 F) |
| 2019 | -20.6 C (-5.1 F) |
| 2020 | -11.7 C (10.9 F) |
| 2021 | -15.0 C (5.0 F) |
| 2022 | -20.0 C (-4.0 F) |
| 2023 | -12.8 C (9.0 F) |
| 2024 | -15.6 C (3.9 F) |
| 2025 | -22.8 C (-9.0 F) |
| 2026 | -21.7 C (-7.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1975 | 43.2 mm (1.7 in) |
| 1976 | 53.3 mm (2.1 in) |
| 1977 | 46.5 mm (1.8 in) |
| 1978 | 50.5 mm (2.0 in) |
| 1979 | 37.8 mm (1.5 in) |
| 1980 | 63.2 mm (2.5 in) |
| 1981 | 59.7 mm (2.4 in) |
| 1982 | 33.5 mm (1.3 in) |
| 1983 | 45.7 mm (1.8 in) |
| 1984 | 34.5 mm (1.4 in) |
| 1985 | 88.1 mm (3.5 in) |
| 1986 | 39.4 mm (1.6 in) |
| 1987 | 57.7 mm (2.3 in) |
| 1988 | 45.7 mm (1.8 in) |
| 1989 | 54.9 mm (2.2 in) |
| 1990 | 73.7 mm (2.9 in) |
| 1991 | 86.4 mm (3.4 in) |
| 1992 | 46.5 mm (1.8 in) |
| 1993 | 43.2 mm (1.7 in) |
| 1994 | 61.7 mm (2.4 in) |
| 1995 | 33.0 mm (1.3 in) |
| 1996 | 73.7 mm (2.9 in) |
| 1997 | 87.6 mm (3.4 in) |
| 1998 | 75.7 mm (3.0 in) |
| 1999 | 68.6 mm (2.7 in) |
| 2000 | 62.2 mm (2.4 in) |
| 2001 | 58.4 mm (2.3 in) |
| 2002 | 52.8 mm (2.1 in) |
| 2003 | 58.9 mm (2.3 in) |
| 2004 | 108.7 mm (4.3 in) |
| 2005 | 72.1 mm (2.8 in) |
| 2006 | 41.9 mm (1.6 in) |
| 2007 | 82.0 mm (3.2 in) |
| 2008 | 51.8 mm (2.0 in) |
| 2009 | 55.1 mm (2.2 in) |
| 2010 | 85.3 mm (3.4 in) |
| 2011 | 47.0 mm (1.9 in) |
| 2012 | 48.8 mm (1.9 in) |
| 2013 | 51.8 mm (2.0 in) |
| 2014 | 30.7 mm (1.2 in) |
| 2015 | 71.6 mm (2.8 in) |
| 2016 | 59.4 mm (2.3 in) |
| 2017 | 74.9 mm (2.9 in) |
| 2018 | 92.2 mm (3.6 in) |
| 2019 | 59.7 mm (2.4 in) |
| 2020 | 48.3 mm (1.9 in) |
| 2021 | 50.8 mm (2.0 in) |
| 2022 | 73.4 mm (2.9 in) |
| 2023 | 60.7 mm (2.4 in) |
| 2024 | 50.8 mm (2.0 in) |
| 2025 | 54.6 mm (2.1 in) |
| 2026 | 50.8 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1975 | 69.6 mm (2.7 in) |
| 1976 | 77.2 mm (3.0 in) |
| 1977 | 89.9 mm (3.5 in) |
| 1978 | 66.3 mm (2.6 in) |
| 1979 | 85.3 mm (3.4 in) |
| 1980 | 90.1 mm (3.5 in) |
| 1981 | 91.7 mm (3.6 in) |
| 1982 | 52.4 mm (2.1 in) |
| 1983 | 88.7 mm (3.5 in) |
| 1984 | 47.2 mm (1.9 in) |
| 1985 | 134.0 mm (5.3 in) |
| 1986 | 81.9 mm (3.2 in) |
| 1987 | 83.1 mm (3.3 in) |
| 1988 | 102.6 mm (4.0 in) |
| 1989 | 69.8 mm (2.7 in) |
| 1990 | 80.1 mm (3.2 in) |
| 1991 | 98.0 mm (3.9 in) |
| 1992 | 68.0 mm (2.7 in) |
| 1993 | 74.4 mm (2.9 in) |
| 1994 | 84.6 mm (3.3 in) |
| 1995 | 55.3 mm (2.2 in) |
| 1996 | 92.7 mm (3.6 in) |
| 1997 | 116.8 mm (4.6 in) |
| 1998 | 140.7 mm (5.5 in) |
| 1999 | 96.1 mm (3.8 in) |
| 2000 | 87.6 mm (3.4 in) |
| 2001 | 96.1 mm (3.8 in) |
| 2002 | 66.8 mm (2.6 in) |
| 2003 | 86.7 mm (3.4 in) |
| 2004 | 136.4 mm (5.4 in) |
| 2005 | 107.0 mm (4.2 in) |
| 2006 | 79.1 mm (3.1 in) |
| 2007 | 90.9 mm (3.6 in) |
| 2008 | 85.9 mm (3.4 in) |
| 2009 | 80.0 mm (3.1 in) |
| 2010 | 104.3 mm (4.1 in) |
| 2011 | 93.5 mm (3.7 in) |
| 2012 | 91.2 mm (3.6 in) |
| 2013 | 91.4 mm (3.6 in) |
| 2014 | 57.3 mm (2.3 in) |
| 2015 | 97.0 mm (3.8 in) |
| 2016 | 78.9 mm (3.1 in) |
| 2017 | 108.9 mm (4.3 in) |
| 2018 | 148.0 mm (5.8 in) |
| 2019 | 92.1 mm (3.6 in) |
| 2020 | 77.6 mm (3.1 in) |
| 2021 | 60.9 mm (2.4 in) |
| 2022 | 86.6 mm (3.4 in) |
| 2023 | 95.3 mm (3.8 in) |
| 2024 | 91.9 mm (3.6 in) |
| 2025 | 107.2 mm (4.2 in) |
| 2026 | 72.8 mm (2.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1975 | 14 days |
| 1976 | 20 days |
| 1977 | 28 days |
| 1978 | 11 days |
| 1979 | 11 days |
| 1980 | 17 days |
| 1981 | 11 days |
| 1982 | 12 days |
| 1983 | 22 days |
| 1984 | 19 days |
| 1985 | 23 days |
| 1986 | 21 days |
| 1987 | 17 days |
| 1988 | 17 days |
| 1989 | 15 days |
| 1990 | 16 days |
| 1991 | 29 days |
| 1992 | 15 days |
| 1993 | 17 days |
| 1994 | 20 days |
| 1995 | 28 days |
| 1996 | 18 days |
| 1997 | 15 days |
| 1998 | 17 days |
| 1999 | 23 days |
| 2000 | 21 days |
| 2001 | 25 days |
| 2002 | 14 days |
| 2003 | 11 days |
| 2004 | 25 days |
| 2005 | 15 days |
| 2006 | 14 days |
| 2007 | 20 days |
| 2008 | 13 days |
| 2009 | 17 days |
| 2010 | 14 days |
| 2011 | 12 days |
| 2012 | 13 days |
| 2013 | 11 days |
| 2014 | 17 days |
| 2015 | 19 days |
| 2016 | 10 days |
| 2017 | 22 days |
| 2018 | 12 days |
| 2019 | 12 days |
| 2020 | 14 days |
| 2021 | 16 days |
| 2022 | 12 days |
| 2023 | 21 days |
| 2024 | 16 days |
| 2025 | 21 days |
| 2026 | 10 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
48 years with a frostAcross 48 years with a frost, the median last spring frost at Hannibal Locks & Dam falls on 27 April and the median first autumn frost on 26 October, which leaves a median of 178 days between them.
Fitted over all years, the growing season changes by +0.9 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 27 April | n/a | 28 April | n/a | 0.0 days per decade |
| First autumn frost | 26 October | n/a | 26 October | n/a | +0.8 days per decade |
| Growing days | 178 days | n/a | 177 days | n/a | +0.9 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
50 years, 1976 to 2025A day with at least 56.9 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 110.9 mm (4.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 56.9 mm (2.2 in) | |
| 5 years | 72.6 mm (2.9 in) | |
| 10 years | 82.5 mm (3.2 in) | |
| 25 years | 94.4 mm (3.7 in) | |
| 50 years | 102.8 mm (4.0 in) | |
| 100 years | 110.9 mm (4.4 in) | Longer than the 50 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, 50 years of values from 1976 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: 108.7 mm (4.3 in) in 2004; 92.2 mm (3.6 in) in 2018; 88.1 mm (3.5 in) in 1985.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Hannibal Locks & Dam, at 1986 and 2015. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1986 ran 0.2 C (0.4 F) lower than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2015 ran 0.3 C (0.5 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1986 | -0.2 | -0.4 | possible | 5 |
| 2015 | -0.3 | -0.5 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
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).