Riverton Threshold Days by Year (USW00024061)
15 fixed thresholds counted per year at Riverton (USW00024061): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Riverton Thresholds
- Riverton: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 2006 with 72.
- Riverton: days with a maximum temperature at or above 90 F (32.2 C) in 27 years, most in 2007 with 48.
- Riverton: days with a maximum temperature at or below 0 C (32 F) in 27 years, most in 2023 with 101.
- Riverton: nights with a minimum temperature at or below 0 C (32 F) in 27 years, most in 2002 with 202.
- 15 fixed thresholds have at least one qualifying day at Riverton.
Days at or above 30 C (86 F)
27 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1997 | 38 | 43 |
| 1998 | 46 | 43 |
| 1999 | 45 | 43 |
| 2000 | 66 | 55.1 |
| 2001 | 65 | 55.1 |
| 2002 | 47 | 55.1 |
| 2003 | 62 | 55.1 |
| 2004 | 31 | 55.1 |
| 2005 | 54 | 55.1 |
| 2006 | 72 | 55.1 |
| 2007 | 68 | 55.1 |
| 2008 | 52 | 55.1 |
| 2009 | 34 | 55.1 |
| 2010 | 45 | 56 |
| 2011 | 57 | 56 |
| 2012 | 67 | 56 |
| 2015 | 50 | 56 |
| 2016 | 64 | 56 |
| 2017 | 50 | 56 |
| 2018 | 60 | 56 |
| 2019 | 55 | 56 |
| 2020 | 69 | 60.3 |
| 2021 | 61 | 60.3 |
| 2022 | 69 | 60.3 |
| 2023 | 37 | 60.3 |
| 2024 | 62 | 60.3 |
| 2025 | 64 | 60.3 |
| Year | First date | Last date |
|---|---|---|
| 1997 | 1997-05-31 | 1997-09-10 |
| 1998 | 1998-07-01 | 1998-09-09 |
| 1999 | 1999-06-20 | 1999-08-30 |
| 2000 | 2000-06-03 | 2000-09-16 |
| 2001 | 2001-05-13 | 2001-09-28 |
| 2002 | 2002-05-30 | 2002-09-04 |
| 2003 | 2003-05-26 | 2003-08-27 |
| 2004 | 2004-06-06 | 2004-09-12 |
| 2005 | 2005-06-16 | 2005-09-08 |
| 2006 | 2006-05-20 | 2006-09-13 |
| 2007 | 2007-05-12 | 2007-09-22 |
| 2008 | 2008-05-18 | 2008-08-30 |
| 2009 | 2009-05-18 | 2009-09-26 |
| 2010 | 2010-06-24 | 2010-09-26 |
| 2011 | 2011-06-06 | 2011-09-01 |
| 2012 | 2012-06-03 | 2012-08-31 |
| 2015 | 2015-06-09 | 2015-09-26 |
| 2016 | 2016-06-07 | 2016-09-20 |
| 2017 | 2017-06-04 | 2017-09-12 |
| 2018 | 2018-05-26 | 2018-09-16 |
| 2019 | 2019-06-26 | 2019-09-16 |
| 2020 | 2020-05-18 | 2020-09-24 |
| 2021 | 2021-06-03 | 2021-09-10 |
| 2022 | 2022-06-10 | 2022-09-08 |
| 2023 | 2023-07-02 | 2023-09-01 |
| 2024 | 2024-06-05 | 2024-09-29 |
| 2025 | 2025-06-01 | 2025-09-11 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 27 | 72 | 2006 | 64 |
| 35 C (95 F): Days | 26 | 19 | 2007 | 9 |
| 90 F (32.2 C): Days | 27 | 48 | 2007 | 36 |
| 100 F (37.8 C): Days | 9 | 3 | 2002 | 1 |
| 0 C (32 F): Ice days (max | 27 | 101 | 2023 | 46 |
| 0 C (32 F): Frost days (min | 27 | 202 | 2002 | 165 |
| -10 C (14 F): Days with min | 27 | 95 | 2023 | 55 |
| -20 C (-4 F): Days with min | 26 | 27 | 2023 | 8 |
| -30 C (-22 F): Days with min | 7 | 5 | 2023 | 2 |
| 20 C (68 F): Tropical nights (min | 12 | 3 | 2003 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 25 | 13 | 2016 | 5 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 11 | 2 | 2008 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 2 | 1 | 2008 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 10 | 8 | 2023 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 2 | 1 | 2017 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.
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). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).