Marietta Wwtp Weather Records (USC00334927)
Record envelope, standing records and threshold days for Marietta Wwtp (USC00334927), Ohio, United States, with 64 years of record.
Key Facts for Marietta Wwtp
- Marietta Wwtp (USC00334927) is a weather station in Ohio, United States at 39.41 latitude and -81.43 longitude, 186 m (610 ft) above sea level.
- The station reports from 1963 to 2026, 64 years of record.
- 1,464 records set at Marietta Wwtp still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Marietta Wwtp set a daily record precipitation of 48.3 mm (1.9 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, 39.41 latitude, -81.43 longitude.
- Elevation: 186 m (610 ft).
- Period of record: 1963 to 2026, 64 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
11 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 25.0 C (77.0 F) | -30.6 C (-23.1 F) | 18.3 C (64.9 F) | -19.4 C (-2.9 F) |
| Feb | 25.6 C (78.1 F) | -23.3 C (-9.9 F) | 18.3 C (64.9 F) | -17.2 C (1.0 F) |
| Mar | 30.0 C (86.0 F) | -18.9 C (-2.0 F) | 30.0 C (86.0 F) | -7.8 C (18.0 F) |
| Apr | 32.8 C (91.0 F) | -7.2 C (19.0 F) | 29.4 C (84.9 F) | -1.1 C (30.0 F) |
| May | 33.9 C (93.0 F) | -3.3 C (26.1 F) | 32.8 C (91.0 F) | 0.6 C (33.1 F) |
| Jun | 37.8 C (100.0 F) | 2.8 C (37.0 F) | 33.9 C (93.0 F) | 9.4 C (48.9 F) |
| Jul | 39.4 C (102.9 F) | 6.7 C (44.1 F) | 35.6 C (96.1 F) | 12.8 C (55.0 F) |
| Aug | 37.8 C (100.0 F) | 3.3 C (37.9 F) | 32.8 C (91.0 F) | 13.3 C (55.9 F) |
| Sep | 36.1 C (97.0 F) | 0.6 C (33.1 F) | 35.0 C (95.0 F) | 7.2 C (45.0 F) |
| Oct | 33.9 C (93.0 F) | -6.7 C (19.9 F) | 29.4 C (84.9 F) | 4.4 C (39.9 F) |
| Nov | 27.8 C (82.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| Dec | 25.6 C (78.1 F) | -23.9 C (-11.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1963 | 33 |
| 1964 | 25 |
| 1965 | 26 |
| 1966 | 39 |
| 1967 | 38 |
| 1968 | 27 |
| 1969 | 19 |
| 1970 | 31 |
| 1971 | 37 |
| 1972 | 31 |
| 1973 | 36 |
| 1974 | 23 |
| 1975 | 12 |
| 1976 | 41 |
| 1977 | 44 |
| 1978 | 22 |
| 1979 | 33 |
| 1980 | 15 |
| 1981 | 19 |
| 1982 | 30 |
| 1983 | 17 |
| 1984 | 21 |
| 1985 | 28 |
| 1986 | 26 |
| 1987 | 25 |
| 1988 | 38 |
| 1989 | 31 |
| 1990 | 23 |
| 1991 | 38 |
| 1992 | 14 |
| 1993 | 15 |
| 1994 | 15 |
| 1995 | 12 |
| 1996 | 26 |
| 1997 | 19 |
| 1998 | 25 |
| 1999 | 13 |
| 2000 | 15 |
| 2001 | 20 |
| 2002 | 30 |
| 2003 | 7 |
| 2004 | 6 |
| 2005 | 15 |
| 2006 | 17 |
| 2007 | 36 |
| 2008 | 17 |
| 2009 | 11 |
| 2010 | 19 |
| 2011 | 12 |
| 2012 | 23 |
| 2013 | 14 |
| 2014 | 25 |
| 2015 | 31 |
| 2016 | 15 |
| 2017 | 23 |
| 2018 | 33 |
| 2019 | 20 |
| 2020 | 17 |
| 2021 | 9 |
| 2022 | 10 |
| 2023 | 17 |
| 2024 | 26 |
| 2025 | 11 |
| 2026 | 18 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1993-03-13 | Record daily snowfall | Record daily snowfall 49.5 cm (19.5 in) |
| 1993-03-13 | Record snow depth | Record snow depth 50.8 cm (20.0 in) |
| 1994-01-19 | Record low maximum temperature | Record low maximum temperature -17.8 C (0.0 F) |
| 1994-01-19 | Record low minimum temperature | Record low minimum temperature -30.6 C (-23.1 F) |
| 2012-07-08 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
Wettest Day of Each Month
Aug: 121.4 mm (4.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 47.2 mm (1.9 in) | 3 January 2023 |
| Feb | 71.9 mm (2.8 in) | 19 February 2000 |
| Mar | 80.5 mm (3.2 in) | 4 March 1963 |
| Apr | 57.2 mm (2.3 in) | 2 April 2024 |
| May | 76.2 mm (3.0 in) | 3 May 2010 |
| Jun | 101.6 mm (4.0 in) | 28 June 1998 |
| Jul | 74.7 mm (2.9 in) | 13 July 2010 |
| Aug | 121.4 mm (4.8 in) | 5 August 1989 |
| Sep | 108.5 mm (4.3 in) | 18 September 2004 |
| Oct | 69.9 mm (2.8 in) | 7 October 2019 |
| Nov | 62.5 mm (2.5 in) | 6 November 2017 |
| Dec | 57.2 mm (2.3 in) | 2 December 1991 |
Period of Record Coverage
1963 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1963 | 301 | 82% | No |
| 1964 | 366 | 100% | Yes |
| 1965 | 360 | 99% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 362 | 99% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 334 | 92% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 362 | 99% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 333 | 91% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 363 | 99% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 361 | 99% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 362 | 99% | Yes |
| 2012 | 362 | 99% | Yes |
| 2013 | 363 | 99% | Yes |
| 2014 | 350 | 96% | Yes |
| 2015 | 312 | 85% | No |
| 2016 | 362 | 99% | Yes |
| 2017 | 359 | 98% | Yes |
| 2018 | 317 | 87% | No |
| 2019 | 357 | 98% | Yes |
| 2020 | 365 | 100% | Yes |
| 2021 | 360 | 99% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 280 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 October 2026 | Marietta Wwtp, US | daily rain (Provisional) | 48.3 mm (1.9 in) | 29.8 mm (1.2 in) | 43 years | 49 of 100 (Notable) |
| 20 September 2026 | Marietta Wwtp, US | daily high min (Provisional) | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 60 years | 25 of 100 (Routine) |
| 17 September 2026 | Marietta Wwtp, US | daily high min (Provisional) | 21.7 C (71.1 F) | 1.7 C (3.1 F) | 56 years | 25 of 100 (Routine) |
| 10 September 2026 | Marietta Wwtp, US | daily high min (Provisional) | 22.2 C (72.0 F) | 0.5 C (0.9 F) | 56 years | 23 of 100 (Routine) |
| 3 September 2026 | Marietta Wwtp, US | daily high min (Tie, Provisional) | 21.7 C (71.1 F) | tie | 63 years | 6 of 100 (Routine) |
| 1 September 2026 | Marietta Wwtp, US | daily high min (Provisional) | 22.2 C (72.0 F) | 0.5 C (0.9 F) | 12 years | 10 of 100 (Routine) |
| 16 August 2026 | Marietta Wwtp, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 16 years | 2 of 100 (Routine) |
| 14 August 2026 | Marietta Wwtp, US | daily rain | 27.9 mm (1.1 in) | 13.7 mm (0.5 in) | 27 years | 25 of 100 (Routine) |
| 11 August 2026 | Marietta Wwtp, US | daily rain | 47.8 mm (1.9 in) | 12.0 mm (0.5 in) | 11 years | 18 of 100 (Routine) |
| 2 August 2026 | Marietta Wwtp, US | daily rain | 30.7 mm (1.2 in) | 8.3 mm (0.33 in) | 41 years | 24 of 100 (Routine) |
| 21 July 2026 | Marietta Wwtp, US | daily rain | 50.8 mm (2.0 in) | 24.9 mm (1.0 in) | 12 years | 30 of 100 (Routine) |
| 18 July 2026 | Marietta Wwtp, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 20 years | 3 of 100 (Routine) |
| 10 July 2026 | Marietta Wwtp, US | daily high min (Tie) | 22.2 C (72.0 F) | tie | 32 years | 3 of 100 (Routine) |
| 4 July 2026 | Marietta Wwtp, US | daily high min | 22.8 C (73.0 F) | 0.6 C (1.1 F) | 27 years | 15 of 100 (Routine) |
| 3 July 2026 | Marietta Wwtp, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 1 year | 1 of 100 (Routine) |
| 1 July 2026 | Marietta Wwtp, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 8 years | 2 of 100 (Routine) |
| 30 June 2026 | Marietta Wwtp, US | daily high min | 22.8 C (73.0 F) | 0.6 C (1.1 F) | 0 years | 7 of 100 (Routine) |
| 18 June 2026 | Marietta Wwtp, US | daily rain | 40.4 mm (1.6 in) | 20.6 mm (0.8 in) | 23 years | 29 of 100 (Routine) |
| 11 June 2026 | Marietta Wwtp, US | daily high min | 22.8 C (73.0 F) | 0.6 C (1.1 F) | 40 years | 19 of 100 (Routine) |
| 9 June 2026 | Marietta Wwtp, US | daily high min (Tie) | 22.2 C (72.0 F) | tie | 32 years | 3 of 100 (Routine) |
Climate Trend
58 complete years, 1964 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1964 | 12.8 C | +0.58 C |
| 1965 | 12.7 C | +0.50 C |
| 1966 | 11.9 C | -0.26 C |
| 1967 | 12.1 C | -0.08 C |
| 1968 | 12.3 C | +0.09 C |
| 1969 | 12.0 C | -0.15 C |
| 1970 | 12.8 C | +0.59 C |
| 1971 | 12.8 C | +0.60 C |
| 1972 | 12.3 C | +0.14 C |
| 1974 | 12.6 C | +0.45 C |
| 1975 | 13.1 C | +0.95 C |
| 1976 | 10.9 C | -1.27 C |
| 1977 | 11.5 C | -0.64 C |
| 1978 | 10.7 C | -1.43 C |
| 1979 | 11.0 C | -1.17 C |
| 1980 | 11.3 C | -0.83 C |
| 1981 | 11.5 C | -0.65 C |
| 1982 | 12.3 C | +0.11 C |
| 1983 | 12.3 C | +0.14 C |
| 1984 | 12.3 C | +0.14 C |
| 1985 | 12.2 C | +0.06 C |
| 1987 | 13.0 C | +0.81 C |
| 1988 | 11.9 C | -0.32 C |
| 1989 | 11.4 C | -0.75 C |
| 1990 | 13.3 C | +1.13 C |
| 1991 | 13.5 C | +1.31 C |
| 1992 | 12.0 C | -0.16 C |
| 1993 | 12.1 C | -0.04 C |
| 1994 | 11.7 C | -0.45 C |
| 1995 | 11.4 C | -0.74 C |
| 1996 | 10.7 C | -1.43 C |
| 1997 | 10.9 C | -1.28 C |
| 1998 | 13.0 C | +0.80 C |
| 1999 | 12.3 C | +0.09 C |
| 2000 | 11.5 C | -0.71 C |
| 2001 | 12.1 C | -0.11 C |
| 2002 | 12.4 C | +0.24 C |
| 2003 | 11.3 C | -0.90 C |
| 2004 | 11.9 C | -0.30 C |
| 2005 | 12.1 C | -0.05 C |
| 2006 | 12.2 C | +0.01 C |
| 2007 | 12.3 C | +0.08 C |
| 2008 | 11.3 C | -0.84 C |
| 2009 | 11.3 C | -0.88 C |
| 2010 | 11.7 C | -0.49 C |
| 2011 | 12.2 C | +0.06 C |
| 2012 | 13.0 C | +0.83 C |
| 2013 | 11.5 C | -0.68 C |
| 2014 | 10.9 C | -1.29 C |
| 2016 | 13.0 C | +0.78 C |
| 2017 | 12.9 C | +0.69 C |
| 2019 | 12.8 C | +0.66 C |
| 2020 | 13.3 C | +1.09 C |
| 2021 | 13.2 C | +1.05 C |
| 2022 | 12.4 C | +0.25 C |
| 2023 | 13.3 C | +1.09 C |
| 2024 | 14.1 C | +1.96 C |
| 2025 | 12.6 C | +0.41 C |
The fitted trend in annual mean temperature here over 1964 to 2025 is 0.08 C (-0.03 to 0.19) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.08 C (-0.03 to 0.19) per decade | 0.1 F (-0.1 to 0.3) per decade | 1964 to 2025 | 58 | Not clearly different from zero |
| Mean daily maximum | -0.01 C (-0.13 to 0.12) per decade | -0.01 F (-0.23 to 0.21) per decade | 1964 to 2025 | 58 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.5) per decade | 1964 to 2025 | 58 | 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
1963 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 2012 | 35.0 C (95.0 F) | 64 |
| Coldest night (TNn) | -30.6 C (-23.1 F) | 1994 | -18.3 C (-0.9 F) | 64 |
| Wettest day (Rx1day) | 121.4 mm (4.8 in) | 1989 | 52.7 mm (2.1 in) | 64 |
| Wettest five days (Rx5day) | 168.6 mm (6.6 in) | 1998 | 82.4 mm (3.2 in) | 64 |
| Longest dry spell (CDD) | 44 days | 1963 | 15 days | 64 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1963 | 33.3 C (91.9 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 38.3 C (100.9 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 35.0 C (95.0 F) |
| 1970 | 35.6 C (96.1 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 35.6 C (96.1 F) |
| 1974 | 32.8 C (91.0 F) |
| 1975 | 35.6 C (96.1 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 34.4 C (93.9 F) |
| 1979 | 32.8 C (91.0 F) |
| 1980 | 36.1 C (97.0 F) |
| 1981 | 33.3 C (91.9 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 37.2 C (99.0 F) |
| 1984 | 33.3 C (91.9 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 36.1 C (97.0 F) |
| 1988 | 38.9 C (102.0 F) |
| 1989 | 35.0 C (95.0 F) |
| 1990 | 35.0 C (95.0 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 33.3 C (91.9 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 35.6 C (96.1 F) |
| 1996 | 32.8 C (91.0 F) |
| 1997 | 33.3 C (91.9 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 37.2 C (99.0 F) |
| 2000 | 32.2 C (90.0 F) |
| 2001 | 33.9 C (93.0 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 32.8 C (91.0 F) |
| 2004 | 32.2 C (90.0 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 34.4 C (93.9 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 36.7 C (98.1 F) |
| 2009 | 32.2 C (90.0 F) |
| 2010 | 34.4 C (93.9 F) |
| 2011 | 35.6 C (96.1 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 34.4 C (93.9 F) |
| 2014 | 33.9 C (93.0 F) |
| 2015 | 33.9 C (93.0 F) |
| 2016 | 35.6 C (96.1 F) |
| 2017 | 33.3 C (91.9 F) |
| 2018 | 34.4 C (93.9 F) |
| 2019 | 35.0 C (95.0 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 35.6 C (96.1 F) |
| 2022 | 34.4 C (93.9 F) |
| 2023 | 33.3 C (91.9 F) |
| 2024 | 36.7 C (98.1 F) |
| 2025 | 35.6 C (96.1 F) |
| 2026 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1963 | -18.9 C (-2.0 F) |
| 1964 | -15.0 C (5.0 F) |
| 1965 | -19.4 C (-2.9 F) |
| 1966 | -18.3 C (-0.9 F) |
| 1967 | -20.0 C (-4.0 F) |
| 1968 | -23.3 C (-9.9 F) |
| 1969 | -16.7 C (1.9 F) |
| 1970 | -19.4 C (-2.9 F) |
| 1971 | -17.8 C (0.0 F) |
| 1972 | -21.7 C (-7.1 F) |
| 1973 | -15.6 C (3.9 F) |
| 1974 | -12.8 C (9.0 F) |
| 1975 | -16.7 C (1.9 F) |
| 1976 | -18.3 C (-0.9 F) |
| 1977 | -27.2 C (-17.0 F) |
| 1978 | -20.6 C (-5.1 F) |
| 1979 | -20.6 C (-5.1 F) |
| 1980 | -17.8 C (0.0 F) |
| 1981 | -20.0 C (-4.0 F) |
| 1982 | -24.4 C (-11.9 F) |
| 1983 | -22.2 C (-8.0 F) |
| 1984 | -25.0 C (-13.0 F) |
| 1985 | -25.6 C (-14.1 F) |
| 1986 | -15.6 C (3.9 F) |
| 1987 | -15.6 C (3.9 F) |
| 1988 | -18.9 C (-2.0 F) |
| 1989 | -23.9 C (-11.0 F) |
| 1990 | -13.3 C (8.1 F) |
| 1991 | -13.9 C (7.0 F) |
| 1992 | -15.6 C (3.9 F) |
| 1993 | -16.7 C (1.9 F) |
| 1994 | -30.6 C (-23.1 F) |
| 1995 | -18.3 C (-0.9 F) |
| 1996 | -21.7 C (-7.1 F) |
| 1997 | -17.8 C (0.0 F) |
| 1998 | -11.7 C (10.9 F) |
| 1999 | -16.1 C (3.0 F) |
| 2000 | -20.0 C (-4.0 F) |
| 2001 | -15.0 C (5.0 F) |
| 2002 | -13.9 C (7.0 F) |
| 2003 | -20.6 C (-5.1 F) |
| 2004 | -18.3 C (-0.9 F) |
| 2005 | -16.7 C (1.9 F) |
| 2006 | -15.0 C (5.0 F) |
| 2007 | -20.0 C (-4.0 F) |
| 2008 | -16.7 C (1.9 F) |
| 2009 | -21.1 C (-6.0 F) |
| 2010 | -14.4 C (6.1 F) |
| 2011 | -19.4 C (-2.9 F) |
| 2012 | -10.6 C (12.9 F) |
| 2013 | -12.8 C (9.0 F) |
| 2014 | -23.9 C (-11.0 F) |
| 2015 | -21.1 C (-6.0 F) |
| 2016 | -18.3 C (-0.9 F) |
| 2017 | -15.0 C (5.0 F) |
| 2018 | -21.1 C (-6.0 F) |
| 2019 | -18.3 C (-0.9 F) |
| 2020 | -11.1 C (12.0 F) |
| 2021 | -13.9 C (7.0 F) |
| 2022 | -18.9 C (-2.0 F) |
| 2023 | -11.1 C (12.0 F) |
| 2024 | -15.0 C (5.0 F) |
| 2025 | -22.2 C (-8.0 F) |
| 2026 | -19.4 C (-2.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1963 | 80.5 mm (3.2 in) |
| 1964 | 34.3 mm (1.4 in) |
| 1965 | 63.8 mm (2.5 in) |
| 1966 | 48.3 mm (1.9 in) |
| 1967 | 43.9 mm (1.7 in) |
| 1968 | 67.6 mm (2.7 in) |
| 1969 | 36.1 mm (1.4 in) |
| 1970 | 50.8 mm (2.0 in) |
| 1971 | 69.6 mm (2.7 in) |
| 1972 | 46.5 mm (1.8 in) |
| 1973 | 30.5 mm (1.2 in) |
| 1974 | 49.8 mm (2.0 in) |
| 1975 | 54.9 mm (2.2 in) |
| 1976 | 49.0 mm (1.9 in) |
| 1977 | 64.5 mm (2.5 in) |
| 1978 | 47.2 mm (1.9 in) |
| 1979 | 44.2 mm (1.7 in) |
| 1980 | 38.6 mm (1.5 in) |
| 1981 | 55.6 mm (2.2 in) |
| 1982 | 35.6 mm (1.4 in) |
| 1983 | 52.1 mm (2.1 in) |
| 1984 | 43.4 mm (1.7 in) |
| 1985 | 68.6 mm (2.7 in) |
| 1986 | 59.9 mm (2.4 in) |
| 1987 | 59.2 mm (2.3 in) |
| 1988 | 53.3 mm (2.1 in) |
| 1989 | 121.4 mm (4.8 in) |
| 1990 | 66.0 mm (2.6 in) |
| 1991 | 60.2 mm (2.4 in) |
| 1992 | 57.7 mm (2.3 in) |
| 1993 | 34.8 mm (1.4 in) |
| 1994 | 61.0 mm (2.4 in) |
| 1995 | 49.3 mm (1.9 in) |
| 1996 | 48.3 mm (1.9 in) |
| 1997 | 80.0 mm (3.1 in) |
| 1998 | 101.6 mm (4.0 in) |
| 1999 | 50.5 mm (2.0 in) |
| 2000 | 71.9 mm (2.8 in) |
| 2001 | 35.8 mm (1.4 in) |
| 2002 | 45.0 mm (1.8 in) |
| 2003 | 56.6 mm (2.2 in) |
| 2004 | 108.5 mm (4.3 in) |
| 2005 | 47.0 mm (1.9 in) |
| 2006 | 44.5 mm (1.8 in) |
| 2007 | 39.1 mm (1.5 in) |
| 2008 | 50.8 mm (2.0 in) |
| 2009 | 66.0 mm (2.6 in) |
| 2010 | 76.2 mm (3.0 in) |
| 2011 | 40.6 mm (1.6 in) |
| 2012 | 45.7 mm (1.8 in) |
| 2013 | 101.6 mm (4.0 in) |
| 2014 | 35.6 mm (1.4 in) |
| 2015 | 54.6 mm (2.1 in) |
| 2016 | 65.3 mm (2.6 in) |
| 2017 | 62.5 mm (2.5 in) |
| 2018 | 58.9 mm (2.3 in) |
| 2019 | 69.9 mm (2.8 in) |
| 2020 | 58.4 mm (2.3 in) |
| 2021 | 57.4 mm (2.3 in) |
| 2022 | 51.1 mm (2.0 in) |
| 2023 | 49.5 mm (1.9 in) |
| 2024 | 57.2 mm (2.3 in) |
| 2025 | 48.0 mm (1.9 in) |
| 2026 | 50.8 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1963 | 145.7 mm (5.7 in) |
| 1964 | 68.9 mm (2.7 in) |
| 1965 | 80.0 mm (3.1 in) |
| 1966 | 69.3 mm (2.7 in) |
| 1967 | 73.0 mm (2.9 in) |
| 1968 | 132.9 mm (5.2 in) |
| 1969 | 56.0 mm (2.2 in) |
| 1970 | 95.3 mm (3.8 in) |
| 1971 | 90.0 mm (3.5 in) |
| 1972 | 67.6 mm (2.7 in) |
| 1973 | 84.8 mm (3.3 in) |
| 1974 | 103.6 mm (4.1 in) |
| 1975 | 78.2 mm (3.1 in) |
| 1976 | 75.7 mm (3.0 in) |
| 1977 | 88.0 mm (3.5 in) |
| 1978 | 72.2 mm (2.8 in) |
| 1979 | 73.1 mm (2.9 in) |
| 1980 | 85.9 mm (3.4 in) |
| 1981 | 76.0 mm (3.0 in) |
| 1982 | 68.2 mm (2.7 in) |
| 1983 | 89.4 mm (3.5 in) |
| 1984 | 51.1 mm (2.0 in) |
| 1985 | 105.9 mm (4.2 in) |
| 1986 | 80.7 mm (3.2 in) |
| 1987 | 89.7 mm (3.5 in) |
| 1988 | 119.8 mm (4.7 in) |
| 1989 | 129.1 mm (5.1 in) |
| 1990 | 137.6 mm (5.4 in) |
| 1991 | 86.4 mm (3.4 in) |
| 1992 | 73.2 mm (2.9 in) |
| 1993 | 56.0 mm (2.2 in) |
| 1994 | 92.2 mm (3.6 in) |
| 1995 | 90.2 mm (3.6 in) |
| 1996 | 79.7 mm (3.1 in) |
| 1997 | 123.3 mm (4.9 in) |
| 1998 | 168.6 mm (6.6 in) |
| 1999 | 65.5 mm (2.6 in) |
| 2000 | 78.8 mm (3.1 in) |
| 2001 | 82.3 mm (3.2 in) |
| 2002 | 96.4 mm (3.8 in) |
| 2003 | 98.6 mm (3.9 in) |
| 2004 | 121.7 mm (4.8 in) |
| 2005 | 75.7 mm (3.0 in) |
| 2006 | 80.6 mm (3.2 in) |
| 2007 | 60.3 mm (2.4 in) |
| 2008 | 77.0 mm (3.0 in) |
| 2009 | 83.1 mm (3.3 in) |
| 2010 | 107.5 mm (4.2 in) |
| 2011 | 82.3 mm (3.2 in) |
| 2012 | 91.6 mm (3.6 in) |
| 2013 | 122.4 mm (4.8 in) |
| 2014 | 58.8 mm (2.3 in) |
| 2015 | 81.6 mm (3.2 in) |
| 2016 | 68.6 mm (2.7 in) |
| 2017 | 82.6 mm (3.3 in) |
| 2018 | 116.0 mm (4.6 in) |
| 2019 | 86.9 mm (3.4 in) |
| 2020 | 117.7 mm (4.6 in) |
| 2021 | 66.3 mm (2.6 in) |
| 2022 | 67.4 mm (2.7 in) |
| 2023 | 69.3 mm (2.7 in) |
| 2024 | 84.6 mm (3.3 in) |
| 2025 | 81.3 mm (3.2 in) |
| 2026 | 107.7 mm (4.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1963 | 44 days |
| 1964 | 22 days |
| 1965 | 29 days |
| 1966 | 21 days |
| 1967 | 24 days |
| 1968 | 18 days |
| 1969 | 27 days |
| 1970 | 14 days |
| 1971 | 15 days |
| 1972 | 12 days |
| 1973 | 15 days |
| 1974 | 15 days |
| 1975 | 15 days |
| 1976 | 20 days |
| 1977 | 17 days |
| 1978 | 11 days |
| 1979 | 13 days |
| 1980 | 14 days |
| 1981 | 15 days |
| 1982 | 11 days |
| 1983 | 13 days |
| 1984 | 21 days |
| 1985 | 18 days |
| 1986 | 12 days |
| 1987 | 13 days |
| 1988 | 29 days |
| 1989 | 10 days |
| 1990 | 12 days |
| 1991 | 25 days |
| 1992 | 18 days |
| 1993 | 17 days |
| 1994 | 16 days |
| 1995 | 13 days |
| 1996 | 19 days |
| 1997 | 12 days |
| 1998 | 13 days |
| 1999 | 17 days |
| 2000 | 15 days |
| 2001 | 18 days |
| 2002 | 15 days |
| 2003 | 13 days |
| 2004 | 25 days |
| 2005 | 21 days |
| 2006 | 19 days |
| 2007 | 14 days |
| 2008 | 13 days |
| 2009 | 17 days |
| 2010 | 12 days |
| 2011 | 12 days |
| 2012 | 19 days |
| 2013 | 12 days |
| 2014 | 14 days |
| 2015 | 11 days |
| 2016 | 10 days |
| 2017 | 22 days |
| 2018 | 10 days |
| 2019 | 20 days |
| 2020 | 14 days |
| 2021 | 14 days |
| 2022 | 9 days |
| 2023 | 21 days |
| 2024 | 16 days |
| 2025 | 16 days |
| 2026 | 20 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
58 years with a frostAcross 58 years with a frost, the median last spring frost at Marietta Wwtp falls on 23 April and the median first autumn frost on 20 October, which leaves a median of 179 days between them.
Fitted over all years, the growing season changes by +4.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 23 April | n/a | 22 April | n/a | -1.8 days per decade |
| First autumn frost | 20 October | n/a | 28 October | n/a | +2.4 days per decade |
| Growing days | 179 days | n/a | 187 days | n/a | +4.2 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
61 years, 1964 to 2025A day with at least 52.8 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 118.3 mm (4.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 52.8 mm (2.1 in) | |
| 5 years | 67.8 mm (2.7 in) | |
| 10 years | 78.7 mm (3.1 in) | |
| 25 years | 93.6 mm (3.7 in) | |
| 50 years | 105.6 mm (4.2 in) | |
| 100 years | 118.3 mm (4.7 in) | Longer than the 61 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, 61 years of values from 1964 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: 121.4 mm (4.8 in) in 1989; 108.5 mm (4.3 in) in 2004; 101.6 mm (4.0 in) in 1998.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Marietta Wwtp, at 1976, 1981 and 2019. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1976 ran 0.8 C (1.5 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 0.4 C (0.8 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2019 ran 0.4 C (0.8 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1976 | -0.8 | -1.5 | likely | 5 |
| 1981 | +0.4 | +0.8 | likely | 5 |
| 2019 | +0.4 | +0.8 | 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.
Climate Twins
2009 to 2025 against 1961 to 1990Over 2009 to 2025, Marietta Wwtp had a mean temperature of 12.5 C (54.6 F) and 1,147.4 mm (45.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Lexington Bluegrass AP (United States, 315 km away), Cave Run Lake (United States, 231 km away) and Madison 3NNW (United States, 150 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Lexington Bluegrass AP | United States | 315 km (196 mi) | 12.7 C (54.8 F) | 1,132.1 mm (44.6 in) | 0.38 |
| Cave Run Lake | United States | 231 km (144 mi) | 12.4 C (54.4 F) | 1,161.2 mm (45.7 in) | 0.47 |
| Madison 3NNW | United States | 150 km (93 mi) | 12.3 C (54.1 F) | 1,155.5 mm (45.5 in) | 0.50 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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).