Merchant Valley Weather Records (USS0012L12S)
Record envelope, standing records and threshold days for Merchant Valley (USS0012L12S), Utah, United States, with 47 years of record.
Key Facts for Merchant Valley
- Merchant Valley (USS0012L12S) is a weather station in Utah, United States at 38.30 latitude and -112.44 longitude, 2,653 m (8,703 ft) above sea level.
- The station reports from 1980 to 2026, 47 years of record.
- 1,464 records set at Merchant Valley still stand.
- Records are tracked for prcp: an element needs 30 years of data to be eligible.
- Merchant Valley set a daily record precipitation of 15.2 mm (0.6 in) on 13 April 2026.
About the Station
- Location: Utah, United States, 38.30 latitude, -112.44 longitude.
- Elevation: 2,653 m (8,703 ft).
- Period of record: 1980 to 2026, 47 years.
- Eligible elements: prcp.
Daily Record Envelope and 2026
32 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 14.6 C (58.3 F) | -29.2 C (-20.6 F) | 11.7 C (53.1 F) | -16.4 C (2.5 F) |
| Feb | 14.6 C (58.3 F) | -25.5 C (-13.9 F) | 12.9 C (55.2 F) | -19.6 C (-3.3 F) |
| Mar | 22.3 C (72.1 F) | -21.7 C (-7.1 F) | 22.3 C (72.1 F) | -12.2 C (10.0 F) |
| Apr | 20.7 C (69.3 F) | -19.8 C (-3.6 F) | 16.4 C (61.5 F) | -11.0 C (12.2 F) |
| May | 25.4 C (77.7 F) | -9.2 C (15.4 F) | 23.6 C (74.5 F) | -5.3 C (22.5 F) |
| Jun | 29.1 C (84.4 F) | -9.4 C (15.1 F) | 27.1 C (80.8 F) | 1.8 C (35.2 F) |
| Jul | 30.8 C (87.4 F) | 1.2 C (34.2 F) | n/a | n/a |
| Aug | 30.1 C (86.2 F) | -0.6 C (30.9 F) | n/a | n/a |
| Sep | 28.4 C (83.1 F) | -7.9 C (17.8 F) | n/a | n/a |
| Oct | 23.6 C (74.5 F) | -19.9 C (-3.8 F) | n/a | n/a |
| Nov | 17.2 C (63.0 F) | -24.8 C (-12.6 F) | n/a | n/a |
| Dec | 13.5 C (56.3 F) | -26.8 C (-16.2 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 2003 | 33 |
| 2004 | 53 |
| 2005 | 58 |
| 2006 | 59 |
| 2007 | 58 |
| 2008 | 65 |
| 2009 | 58 |
| 2010 | 69 |
| 2011 | 66 |
| 2012 | 59 |
| 2013 | 82 |
| 2014 | 49 |
| 2015 | 65 |
| 2016 | 54 |
| 2017 | 67 |
| 2018 | 41 |
| 2019 | 60 |
| 2020 | 71 |
| 2021 | 60 |
| 2022 | 87 |
| 2023 | 49 |
| 2024 | 68 |
| 2025 | 73 |
| 2026 | 60 |
Wettest Day of Each Month
Aug: 116.8 mm (4.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 58.4 mm (2.3 in) | 23 January 1997 |
| Feb | 53.3 mm (2.1 in) | 8 February 1994 |
| Mar | 48.3 mm (1.9 in) | 2 March 1989 |
| Apr | 40.6 mm (1.6 in) | 26 April 2014 |
| May | 53.3 mm (2.1 in) | 3 May 1999 |
| Jun | 86.4 mm (3.4 in) | 23 June 2001 |
| Jul | 55.9 mm (2.2 in) | 26 July 2019 |
| Aug | 116.8 mm (4.6 in) | 2 August 1988 |
| Sep | 50.8 mm (2.0 in) | 9 September 1997 |
| Oct | 43.2 mm (1.7 in) | 4 October 2008 |
| Nov | 63.5 mm (2.5 in) | 26 November 2024 |
| Dec | 61.0 mm (2.4 in) | 20 December 2010 |
Period of Record Coverage
2003 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 2003 | 195 | 53% | No |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 348 | 95% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 173 | 47% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 April 2026 | Merchant Valley, US | daily rain | 15.2 mm (0.6 in) | 7.6 mm (0.30 in) | 29 years | 20 of 100 (Routine) |
| 1 January 2026 | Merchant Valley, US | daily rain (Tie) | 17.8 mm (0.7 in) | tie | 3 years | 1 of 100 (Routine) |
| 16 November 2025 | Merchant Valley, US | daily rain | 15.2 mm (0.6 in) | 2.5 mm (0.10 in) | 31 years | 16 of 100 (Routine) |
| 4 September 2025 | Merchant Valley, US | daily rain | 17.8 mm (0.7 in) | 2.6 mm (0.10 in) | 2 years | 7 of 100 (Routine) |
| 27 August 2025 | Merchant Valley, US | daily rain | 12.7 mm (0.5 in) | 7.6 mm (0.30 in) | 36 years | 20 of 100 (Routine) |
| 23 August 2025 | Merchant Valley, US | daily rain | 20.3 mm (0.8 in) | 5.1 mm (0.20 in) | 22 years | 15 of 100 (Routine) |
| 21 July 2025 | Merchant Valley, US | daily rain (Tie) | 5.1 mm (0.20 in) | tie | 16 years | 2 of 100 (Routine) |
| 28 April 2025 | Merchant Valley, US | daily rain | 12.7 mm (0.5 in) | 2.5 mm (0.10 in) | 20 years | 13 of 100 (Routine) |
| 13 March 2025 | Merchant Valley, US | daily rain (Tie) | 17.8 mm (0.7 in) | tie | 15 years | 2 of 100 (Routine) |
| 14 February 2025 | Merchant Valley, US | daily rain | 25.4 mm (1.0 in) | 10.2 mm (0.4 in) | 30 years | 27 of 100 (Routine) |
| 26 November 2024 | Merchant Valley, US | monthly rain | 63.5 mm (2.5 in) | 17.8 mm (0.7 in) | 41 years | 49 of 100 (Notable) |
| 12 August 2024 | Merchant Valley, US | daily rain | 27.9 mm (1.1 in) | 5.0 mm (0.20 in) | 30 years | 18 of 100 (Routine) |
| 20 July 2024 | Merchant Valley, US | daily rain (Tie) | 17.8 mm (0.7 in) | tie | 26 years | 2 of 100 (Routine) |
| 2 February 2024 | Merchant Valley, US | daily rain | 25.4 mm (1.0 in) | 17.8 mm (0.7 in) | 37 years | 40 of 100 (Notable) |
| 13 January 2024 | Merchant Valley, US | daily rain | 22.9 mm (0.9 in) | 5.1 mm (0.20 in) | 25 years | 18 of 100 (Routine) |
| 19 November 2023 | Merchant Valley, US | daily rain | 25.4 mm (1.0 in) | 2.5 mm (0.10 in) | 4 years | 8 of 100 (Routine) |
| 2 October 2023 | Merchant Valley, US | daily rain (Tie) | 17.8 mm (0.7 in) | tie | 20 years | 2 of 100 (Routine) |
| 4 September 2023 | Merchant Valley, US | daily rain | 15.2 mm (0.6 in) | 7.6 mm (0.30 in) | 32 years | 20 of 100 (Routine) |
| 2 September 2023 | Merchant Valley, US | daily rain (Tie) | 2.5 mm (0.10 in) | tie | 28 years | 3 of 100 (Routine) |
| 31 August 2023 | Merchant Valley, US | daily rain (Tie) | 10.2 mm (0.4 in) | tie | 9 years | 1 of 100 (Routine) |
Climate Trend
21 complete years, 2004 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 2004 | 4.5 C | -0.52 C |
| 2005 | 4.9 C | -0.14 C |
| 2006 | 4.7 C | -0.32 C |
| 2007 | 5.1 C | +0.14 C |
| 2009 | 4.4 C | -0.64 C |
| 2010 | 4.3 C | -0.72 C |
| 2011 | 4.1 C | -0.93 C |
| 2012 | 5.4 C | +0.40 C |
| 2013 | 4.2 C | -0.76 C |
| 2014 | 5.3 C | +0.31 C |
| 2015 | 5.5 C | +0.49 C |
| 2016 | 5.4 C | +0.37 C |
| 2017 | 5.8 C | +0.84 C |
| 2018 | 5.3 C | +0.26 C |
| 2019 | 4.0 C | -0.99 C |
| 2020 | 5.6 C | +0.57 C |
| 2021 | 5.5 C | +0.45 C |
| 2022 | 4.9 C | -0.10 C |
| 2023 | 4.3 C | -0.66 C |
| 2024 | 5.7 C | +0.74 C |
| 2025 | 6.2 C | +1.18 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
1980 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 30.8 C (87.4 F) | 2003 | 28.7 C (83.7 F) | 24 |
| Coldest night (TNn) | -29.2 C (-20.6 F) | 2013 | -23.0 C (-9.4 F) | 24 |
| Wettest day (Rx1day) | 116.8 mm (4.6 in) | 1988 | 40.6 mm (1.6 in) | 47 |
| Wettest five days (Rx5day) | 172.8 mm (6.8 in) | 2010 | 71.2 mm (2.8 in) | 47 |
| Longest dry spell (CDD) | 69 days | 2012 | 31 days | 47 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 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 | n/a |
| 1998 | n/a |
| 1999 | n/a |
| 2000 | n/a |
| 2001 | n/a |
| 2002 | n/a |
| 2003 | 30.8 C (87.4 F) |
| 2004 | 27.2 C (81.0 F) |
| 2005 | 29.8 C (85.6 F) |
| 2006 | 29.6 C (85.3 F) |
| 2007 | 29.8 C (85.6 F) |
| 2008 | 28.9 C (84.0 F) |
| 2009 | 28.3 C (82.9 F) |
| 2010 | 27.5 C (81.5 F) |
| 2011 | 26.8 C (80.2 F) |
| 2012 | 27.5 C (81.5 F) |
| 2013 | 28.8 C (83.8 F) |
| 2014 | 27.0 C (80.6 F) |
| 2015 | 27.7 C (81.9 F) |
| 2016 | 29.3 C (84.7 F) |
| 2017 | 28.6 C (83.5 F) |
| 2018 | 28.2 C (82.8 F) |
| 2019 | 27.0 C (80.6 F) |
| 2020 | 30.1 C (86.2 F) |
| 2021 | 30.7 C (87.3 F) |
| 2022 | 28.4 C (83.1 F) |
| 2023 | 30.0 C (86.0 F) |
| 2024 | 30.6 C (87.1 F) |
| 2025 | 29.6 C (85.3 F) |
| 2026 | 27.1 C (80.8 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 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 | n/a |
| 1998 | n/a |
| 1999 | n/a |
| 2000 | n/a |
| 2001 | n/a |
| 2002 | n/a |
| 2003 | -21.1 C (-6.0 F) |
| 2004 | -25.7 C (-14.3 F) |
| 2005 | -21.3 C (-6.3 F) |
| 2006 | -25.0 C (-13.0 F) |
| 2007 | -27.4 C (-17.3 F) |
| 2008 | -26.5 C (-15.7 F) |
| 2009 | -23.3 C (-9.9 F) |
| 2010 | -26.8 C (-16.2 F) |
| 2011 | -27.1 C (-16.8 F) |
| 2012 | -20.5 C (-4.9 F) |
| 2013 | -29.2 C (-20.6 F) |
| 2014 | -23.0 C (-9.4 F) |
| 2015 | -20.9 C (-5.6 F) |
| 2016 | -24.0 C (-11.2 F) |
| 2017 | -22.5 C (-8.5 F) |
| 2018 | -23.6 C (-10.5 F) |
| 2019 | -25.2 C (-13.4 F) |
| 2020 | -23.0 C (-9.4 F) |
| 2021 | -20.7 C (-5.3 F) |
| 2022 | -22.3 C (-8.1 F) |
| 2023 | -22.2 C (-8.0 F) |
| 2024 | -19.8 C (-3.6 F) |
| 2025 | -20.1 C (-4.2 F) |
| 2026 | -19.6 C (-3.3 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1980 | 17.8 mm (0.7 in) |
| 1981 | 30.5 mm (1.2 in) |
| 1982 | 45.7 mm (1.8 in) |
| 1983 | 50.8 mm (2.0 in) |
| 1984 | 38.1 mm (1.5 in) |
| 1985 | 43.2 mm (1.7 in) |
| 1986 | 33.0 mm (1.3 in) |
| 1987 | 35.6 mm (1.4 in) |
| 1988 | 116.8 mm (4.6 in) |
| 1989 | 48.3 mm (1.9 in) |
| 1990 | 38.1 mm (1.5 in) |
| 1991 | 35.6 mm (1.4 in) |
| 1992 | 40.6 mm (1.6 in) |
| 1993 | 45.7 mm (1.8 in) |
| 1994 | 53.3 mm (2.1 in) |
| 1995 | 27.9 mm (1.1 in) |
| 1996 | 27.9 mm (1.1 in) |
| 1997 | 58.4 mm (2.3 in) |
| 1998 | 25.4 mm (1.0 in) |
| 1999 | 53.3 mm (2.1 in) |
| 2000 | 40.6 mm (1.6 in) |
| 2001 | 86.4 mm (3.4 in) |
| 2002 | 20.3 mm (0.8 in) |
| 2003 | 27.9 mm (1.1 in) |
| 2004 | 38.1 mm (1.5 in) |
| 2005 | 33.0 mm (1.3 in) |
| 2006 | 33.0 mm (1.3 in) |
| 2007 | 50.8 mm (2.0 in) |
| 2008 | 43.2 mm (1.7 in) |
| 2009 | 45.7 mm (1.8 in) |
| 2010 | 61.0 mm (2.4 in) |
| 2011 | 35.6 mm (1.4 in) |
| 2012 | 35.6 mm (1.4 in) |
| 2013 | 40.6 mm (1.6 in) |
| 2014 | 50.8 mm (2.0 in) |
| 2015 | 35.6 mm (1.4 in) |
| 2016 | 48.3 mm (1.9 in) |
| 2017 | 61.0 mm (2.4 in) |
| 2018 | 33.0 mm (1.3 in) |
| 2019 | 55.9 mm (2.2 in) |
| 2020 | 17.8 mm (0.7 in) |
| 2021 | 48.3 mm (1.9 in) |
| 2022 | 45.7 mm (1.8 in) |
| 2023 | 38.1 mm (1.5 in) |
| 2024 | 63.5 mm (2.5 in) |
| 2025 | 25.4 mm (1.0 in) |
| 2026 | 22.9 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1980 | 33.0 mm (1.3 in) |
| 1981 | 58.5 mm (2.3 in) |
| 1982 | 83.8 mm (3.3 in) |
| 1983 | 116.9 mm (4.6 in) |
| 1984 | 76.2 mm (3.0 in) |
| 1985 | 99.0 mm (3.9 in) |
| 1986 | 73.7 mm (2.9 in) |
| 1987 | 53.4 mm (2.1 in) |
| 1988 | 134.6 mm (5.3 in) |
| 1989 | 53.3 mm (2.1 in) |
| 1990 | 71.2 mm (2.8 in) |
| 1991 | 71.2 mm (2.8 in) |
| 1992 | 76.2 mm (3.0 in) |
| 1993 | 76.1 mm (3.0 in) |
| 1994 | 63.4 mm (2.5 in) |
| 1995 | 73.6 mm (2.9 in) |
| 1996 | 63.5 mm (2.5 in) |
| 1997 | 88.9 mm (3.5 in) |
| 1998 | 55.9 mm (2.2 in) |
| 1999 | 78.7 mm (3.1 in) |
| 2000 | 53.3 mm (2.1 in) |
| 2001 | 99.1 mm (3.9 in) |
| 2002 | 53.4 mm (2.1 in) |
| 2003 | 55.8 mm (2.2 in) |
| 2004 | 86.4 mm (3.4 in) |
| 2005 | 68.7 mm (2.7 in) |
| 2006 | 53.4 mm (2.1 in) |
| 2007 | 83.8 mm (3.3 in) |
| 2008 | 55.9 mm (2.2 in) |
| 2009 | 73.7 mm (2.9 in) |
| 2010 | 172.8 mm (6.8 in) |
| 2011 | 71.1 mm (2.8 in) |
| 2012 | 55.9 mm (2.2 in) |
| 2013 | 58.4 mm (2.3 in) |
| 2014 | 58.4 mm (2.3 in) |
| 2015 | 60.9 mm (2.4 in) |
| 2016 | 61.0 mm (2.4 in) |
| 2017 | 93.9 mm (3.7 in) |
| 2018 | 86.3 mm (3.4 in) |
| 2019 | 78.7 mm (3.1 in) |
| 2020 | 33.1 mm (1.3 in) |
| 2021 | 83.8 mm (3.3 in) |
| 2022 | 78.7 mm (3.1 in) |
| 2023 | 83.9 mm (3.3 in) |
| 2024 | 76.2 mm (3.0 in) |
| 2025 | 48.3 mm (1.9 in) |
| 2026 | 40.7 mm (1.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1980 | 12 days |
| 1981 | 33 days |
| 1982 | 30 days |
| 1983 | 22 days |
| 1984 | 22 days |
| 1985 | 26 days |
| 1986 | 37 days |
| 1987 | 21 days |
| 1988 | 23 days |
| 1989 | 31 days |
| 1990 | 23 days |
| 1991 | 33 days |
| 1992 | 27 days |
| 1993 | 45 days |
| 1994 | 68 days |
| 1995 | 35 days |
| 1996 | 41 days |
| 1997 | 37 days |
| 1998 | 18 days |
| 1999 | 30 days |
| 2000 | 31 days |
| 2001 | 18 days |
| 2002 | 41 days |
| 2003 | 50 days |
| 2004 | 29 days |
| 2005 | 26 days |
| 2006 | 39 days |
| 2007 | 45 days |
| 2008 | 30 days |
| 2009 | 20 days |
| 2010 | 26 days |
| 2011 | 19 days |
| 2012 | 69 days |
| 2013 | 37 days |
| 2014 | 36 days |
| 2015 | 29 days |
| 2016 | 20 days |
| 2017 | 54 days |
| 2018 | 54 days |
| 2019 | 22 days |
| 2020 | 36 days |
| 2021 | 37 days |
| 2022 | 43 days |
| 2023 | 25 days |
| 2024 | 50 days |
| 2025 | 32 days |
| 2026 | 36 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
21 years with a frostAcross 21 years with a frost, the median last spring frost at Merchant Valley falls on 11 June and the median first autumn frost on 20 September, which leaves a median of 101 days between them.
| Measure | Median, all years | Earliest period | Recent period (2004 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 11 June | n/a | 11 June | n/a | n/a |
| First autumn frost | 20 September | n/a | 20 September | n/a | n/a |
| Growing days | 101 days | n/a | 101 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
45 years, 1981 to 2025A day with at least 40.3 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 99.4 mm (3.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 40.3 mm (1.6 in) | |
| 5 years | 54.1 mm (2.1 in) | |
| 10 years | 64.0 mm (2.5 in) | |
| 25 years | 77.5 mm (3.1 in) | |
| 50 years | 88.2 mm (3.5 in) | Longer than the 45 years of record |
| 100 years | 99.4 mm (3.9 in) | Longer than the 45 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, 45 years of values from 1981 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: 116.8 mm (4.6 in) in 1988; 86.4 mm (3.4 in) in 2001; 63.5 mm (2.5 in) in 2024.
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).