Thumb Divide Weather Records (USS0010E07S)
Record envelope, standing records and threshold days for Thumb Divide (USS0010E07S), Wyoming, United States, with 40 years of record.
Key Facts for Thumb Divide
- Thumb Divide (USS0010E07S) is a weather station in Wyoming, United States at 44.37 latitude and -110.58 longitude, 2,432 m (7,980 ft) above sea level.
- The station reports from 1987 to 2026, 40 years of record.
- 1,464 records set at Thumb Divide still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Thumb Divide set a daily record high minimum temperature of 1.7 C (35.1 F) on 10 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Wyoming, United States, 44.37 latitude, -110.58 longitude.
- Elevation: 2,432 m (7,980 ft).
- Period of record: 1987 to 2026, 40 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
20 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 10.2 C (50.4 F) | -42.3 C (-44.1 F) | 3.7 C (38.7 F) | -30.4 C (-22.7 F) |
| Feb | 12.1 C (53.8 F) | -40.5 C (-40.9 F) | 10.0 C (50.0 F) | -34.6 C (-30.3 F) |
| Mar | 16.6 C (61.9 F) | -39.8 C (-39.6 F) | 14.8 C (58.6 F) | -23.1 C (-9.6 F) |
| Apr | 20.1 C (68.2 F) | -29.9 C (-21.8 F) | 17.5 C (63.5 F) | -19.5 C (-3.1 F) |
| May | 26.0 C (78.8 F) | -19.3 C (-2.7 F) | 24.8 C (76.6 F) | -10.2 C (13.6 F) |
| Jun | 29.7 C (85.5 F) | -8.2 C (17.2 F) | 24.3 C (75.7 F) | -3.4 C (25.9 F) |
| Jul | 32.2 C (90.0 F) | -4.1 C (24.6 F) | 32.0 C (89.6 F) | -1.8 C (28.8 F) |
| Aug | 32.5 C (90.5 F) | -7.7 C (18.1 F) | 30.2 C (86.4 F) | -2.9 C (26.8 F) |
| Sep | 29.2 C (84.6 F) | -14.3 C (6.3 F) | 23.0 C (73.4 F) | -5.6 C (21.9 F) |
| Oct | 24.0 C (75.2 F) | -30.2 C (-22.4 F) | 22.2 C (72.0 F) | -3.8 C (25.2 F) |
| Nov | 15.2 C (59.4 F) | -30.7 C (-23.3 F) | n/a | n/a |
| Dec | 7.6 C (45.7 F) | -41.2 C (-42.2 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1987 | 9 |
| 1988 | 42 |
| 1989 | 34 |
| 1990 | 45 |
| 1991 | 38 |
| 1992 | 40 |
| 1993 | 51 |
| 1994 | 34 |
| 1995 | 35 |
| 1998 | 10 |
| 1999 | 46 |
| 2000 | 35 |
| 2001 | 40 |
| 2002 | 42 |
| 2003 | 52 |
| 2004 | 30 |
| 2005 | 46 |
| 2006 | 50 |
| 2007 | 41 |
| 2008 | 42 |
| 2009 | 43 |
| 2010 | 38 |
| 2011 | 27 |
| 2012 | 35 |
| 2013 | 57 |
| 2014 | 45 |
| 2015 | 36 |
| 2016 | 44 |
| 2017 | 31 |
| 2018 | 36 |
| 2019 | 42 |
| 2020 | 42 |
| 2021 | 36 |
| 2022 | 45 |
| 2023 | 40 |
| 2024 | 48 |
| 2025 | 26 |
| 2026 | 31 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 2022-12-22 | Record low minimum temperature | Record low minimum temperature -41.2 C (-42.2 F) |
| 2023-01-30 | Record low minimum temperature | Record low minimum temperature -42.3 C (-44.1 F) |
Wettest Day of Each Month
Nov: 45.7 mm (1.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 40.6 mm (1.6 in) | 1 January 1997 |
| Feb | 35.6 mm (1.4 in) | 2 February 2025 |
| Mar | 27.9 mm (1.1 in) | 16 March 2009 |
| Apr | 27.9 mm (1.1 in) | 10 April 1992 |
| May | 27.9 mm (1.1 in) | 15 May 1999 |
| Jun | 30.5 mm (1.2 in) | 12 June 2022 |
| Jul | 25.4 mm (1.0 in) | 12 July 1997 |
| Aug | 25.4 mm (1.0 in) | 18 August 2005 |
| Sep | 33.0 mm (1.3 in) | 19 September 2017 |
| Oct | 40.6 mm (1.6 in) | 19 October 2007 |
| Nov | 45.7 mm (1.8 in) | 19 November 1996 |
| Dec | 40.6 mm (1.6 in) | 27 December 1996 |
Period of Record Coverage
1987 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1987 | 87 | 24% | No |
| 1988 | 254 | 69% | No |
| 1989 | 350 | 96% | Yes |
| 1990 | 339 | 93% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 349 | 96% | Yes |
| 1994 | 358 | 98% | Yes |
| 1995 | 248 | 68% | No |
| 1998 | 177 | 48% | No |
| 1999 | 365 | 100% | Yes |
| 2000 | 365 | 100% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 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 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 365 | 100% | Yes |
| 2025 | 259 | 71% | No |
| 2026 | 283 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 10 October 2026 | Thumb Divide, US | daily high min (Provisional) | 1.7 C (35.1 F) | 2.2 C (4.0 F) | 36 years | 19 of 100 (Routine) |
| 9 October 2026 | Thumb Divide, US | daily high max (Provisional) | 19.6 C (67.3 F) | 0.2 C (0.4 F) | 1 year | 4 of 100 (Routine) |
| 8 October 2026 | Thumb Divide, US | daily high max (Provisional) | 20.5 C (68.9 F) | 1.2 C (2.2 F) | 1 year | 5 of 100 (Routine) |
| 7 October 2026 | Thumb Divide, US | daily high max (Provisional) | 21.3 C (70.3 F) | 1.4 C (2.5 F) | 39 years | 17 of 100 (Routine) |
| 6 October 2026 | Thumb Divide, US | daily high max (Provisional) | 21.4 C (70.5 F) | 1.8 C (3.2 F) | 5 years | 7 of 100 (Routine) |
| 5 October 2026 | Thumb Divide, US | daily high max (Provisional) | 22.2 C (72.0 F) | 2.0 C (3.6 F) | 23 years | 13 of 100 (Routine) |
| 4 October 2026 | Thumb Divide, US | daily high max (Provisional) | 21.4 C (70.5 F) | 0.1 C (0.2 F) | 1 year | 4 of 100 (Routine) |
| 19 September 2026 | Thumb Divide, US | daily high min (Provisional) | 4.4 C (39.9 F) | 1.1 C (2.0 F) | 12 years | 10 of 100 (Routine) |
| 18 September 2026 | Thumb Divide, US | daily rain (Provisional) | 20.3 mm (0.8 in) | 7.6 mm (0.30 in) | 12 years | 20 of 100 (Routine) |
| 18 September 2026 | Thumb Divide, US | daily high min (Provisional) | 5.3 C (41.5 F) | 0.5 C (0.9 F) | 9 years | 7 of 100 (Routine) |
| 11 September 2026 | Thumb Divide, US | daily high min (Provisional) | 6.0 C (42.8 F) | 1.0 C (1.8 F) | 4 years | 8 of 100 (Routine) |
| 29 August 2026 | Thumb Divide, US | daily high min (Provisional) | 6.1 C (43.0 F) | 1.7 C (3.1 F) | 15 years | 14 of 100 (Routine) |
| 21 August 2026 | Thumb Divide, US | daily high max (Provisional) | 30.2 C (86.4 F) | 2.3 C (4.1 F) | 16 years | 14 of 100 (Routine) |
| 20 August 2026 | Thumb Divide, US | daily high max (Provisional) | 28.2 C (82.8 F) | 1.0 C (1.8 F) | 12 years | 9 of 100 (Routine) |
| 17 August 2026 | Thumb Divide, US | daily rain (Tie, Provisional) | 10.2 mm (0.4 in) | tie | 28 years | 3 of 100 (Routine) |
| 14 August 2026 | Thumb Divide, US | daily low max | 13.4 C (56.1 F) | 0.6 C (1.1 F) | 8 years | 7 of 100 (Routine) |
| 5 August 2026 | Thumb Divide, US | daily low min | -1.6 C (29.1 F) | 0.2 C (0.4 F) | 9 years | 6 of 100 (Routine) |
| 25 July 2026 | Thumb Divide, US | daily high max | 28.0 C (82.4 F) | 0.2 C (0.4 F) | 4 years | 5 of 100 (Routine) |
| 23 July 2026 | Thumb Divide, US | daily high min | 9.5 C (49.1 F) | 0.8 C (1.4 F) | 20 years | 13 of 100 (Routine) |
| 22 July 2026 | Thumb Divide, US | daily rain (Tie) | 7.6 mm (0.30 in) | tie | 21 years | 2 of 100 (Routine) |
Climate Trend
29 complete years, 1991 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1991 | 0.0 C | -0.61 C |
| 1992 | 0.7 C | +0.08 C |
| 1994 | 0.8 C | +0.13 C |
| 1999 | 0.6 C | -0.01 C |
| 2000 | 0.6 C | +0.01 C |
| 2001 | 0.9 C | +0.23 C |
| 2002 | -0.1 C | -0.76 C |
| 2003 | 1.1 C | +0.43 C |
| 2004 | 1.2 C | +0.56 C |
| 2005 | 1.4 C | +0.81 C |
| 2006 | 1.4 C | +0.81 C |
| 2007 | 2.0 C | +1.39 C |
| 2008 | 0.4 C | -0.19 C |
| 2009 | 0.2 C | -0.45 C |
| 2010 | 0.0 C | -0.59 C |
| 2011 | -0.4 C | -1.05 C |
| 2012 | 1.1 C | +0.51 C |
| 2013 | 0.0 C | -0.61 C |
| 2014 | 0.4 C | -0.24 C |
| 2015 | 1.4 C | +0.80 C |
| 2016 | 1.2 C | +0.56 C |
| 2017 | 0.7 C | +0.11 C |
| 2018 | 0.4 C | -0.22 C |
| 2019 | -0.3 C | -0.97 C |
| 2020 | 0.1 C | -0.53 C |
| 2021 | 1.0 C | +0.40 C |
| 2022 | -0.2 C | -0.83 C |
| 2023 | 0.1 C | -0.52 C |
| 2024 | 1.3 C | +0.72 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
1987 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 32.5 C (90.5 F) | 2003 | 29.2 C (84.5 F) | 38 |
| Coldest night (TNn) | -42.3 C (-44.1 F) | 2023 | -35.5 C (-32.0 F) | 38 |
| Wettest day (Rx1day) | 45.7 mm (1.8 in) | 1996 | 27.9 mm (1.1 in) | 40 |
| Wettest five days (Rx5day) | 134.5 mm (5.3 in) | 1996 | 58.4 mm (2.3 in) | 40 |
| Longest dry spell (CDD) | 83 days | 1994 | 21 days | 40 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1987 | 23.0 C (73.4 F) |
| 1988 | 29.7 C (85.5 F) |
| 1989 | 30.0 C (86.0 F) |
| 1990 | 29.2 C (84.6 F) |
| 1991 | 27.0 C (80.6 F) |
| 1992 | 28.3 C (82.9 F) |
| 1993 | 24.4 C (75.9 F) |
| 1994 | 29.1 C (84.4 F) |
| 1995 | 27.0 C (80.6 F) |
| 1996 | n/a |
| 1997 | n/a |
| 1998 | 29.2 C (84.6 F) |
| 1999 | 27.8 C (82.0 F) |
| 2000 | 31.0 C (87.8 F) |
| 2001 | 29.4 C (84.9 F) |
| 2002 | 31.9 C (89.4 F) |
| 2003 | 32.5 C (90.5 F) |
| 2004 | 29.5 C (85.1 F) |
| 2005 | 30.4 C (86.7 F) |
| 2006 | 31.5 C (88.7 F) |
| 2007 | 31.9 C (89.4 F) |
| 2008 | 28.5 C (83.3 F) |
| 2009 | 27.9 C (82.2 F) |
| 2010 | 27.0 C (80.6 F) |
| 2011 | 27.3 C (81.1 F) |
| 2012 | 28.4 C (83.1 F) |
| 2013 | 28.8 C (83.8 F) |
| 2014 | 27.0 C (80.6 F) |
| 2015 | 28.5 C (83.3 F) |
| 2016 | 28.2 C (82.8 F) |
| 2017 | 28.8 C (83.8 F) |
| 2018 | 30.8 C (87.4 F) |
| 2019 | 28.3 C (82.9 F) |
| 2020 | 30.4 C (86.7 F) |
| 2021 | 30.8 C (87.4 F) |
| 2022 | 29.2 C (84.6 F) |
| 2023 | 29.6 C (85.3 F) |
| 2024 | 30.6 C (87.1 F) |
| 2025 | 28.4 C (83.1 F) |
| 2026 | 32.0 C (89.6 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1987 | -29.3 C (-20.7 F) |
| 1988 | -34.4 C (-29.9 F) |
| 1989 | -36.7 C (-34.1 F) |
| 1990 | -40.0 C (-40.0 F) |
| 1991 | -37.2 C (-35.0 F) |
| 1992 | -32.1 C (-25.8 F) |
| 1993 | -33.7 C (-28.7 F) |
| 1994 | -32.1 C (-25.8 F) |
| 1995 | -35.8 C (-32.4 F) |
| 1996 | n/a |
| 1997 | n/a |
| 1998 | -38.4 C (-37.1 F) |
| 1999 | -32.9 C (-27.2 F) |
| 2000 | -32.2 C (-26.0 F) |
| 2001 | -36.1 C (-33.0 F) |
| 2002 | -38.0 C (-36.4 F) |
| 2003 | -40.5 C (-40.9 F) |
| 2004 | -32.1 C (-25.8 F) |
| 2005 | -32.4 C (-26.3 F) |
| 2006 | -35.3 C (-31.5 F) |
| 2007 | -36.8 C (-34.2 F) |
| 2008 | -35.0 C (-31.0 F) |
| 2009 | -34.4 C (-29.9 F) |
| 2010 | -37.1 C (-34.8 F) |
| 2011 | -39.0 C (-38.2 F) |
| 2012 | -30.2 C (-22.4 F) |
| 2013 | -35.2 C (-31.4 F) |
| 2014 | -38.2 C (-36.8 F) |
| 2015 | -34.6 C (-30.3 F) |
| 2016 | -36.2 C (-33.2 F) |
| 2017 | -37.4 C (-35.3 F) |
| 2018 | -34.6 C (-30.3 F) |
| 2019 | -36.5 C (-33.7 F) |
| 2020 | -34.3 C (-29.7 F) |
| 2021 | -32.6 C (-26.7 F) |
| 2022 | -41.2 C (-42.2 F) |
| 2023 | -42.3 C (-44.1 F) |
| 2024 | -37.3 C (-35.1 F) |
| 2025 | -40.2 C (-40.4 F) |
| 2026 | -34.6 C (-30.3 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1987 | 10.2 mm (0.4 in) |
| 1988 | 30.5 mm (1.2 in) |
| 1989 | 35.6 mm (1.4 in) |
| 1990 | 22.9 mm (0.9 in) |
| 1991 | 25.4 mm (1.0 in) |
| 1992 | 27.9 mm (1.1 in) |
| 1993 | 25.4 mm (1.0 in) |
| 1994 | 27.9 mm (1.1 in) |
| 1995 | 33.0 mm (1.3 in) |
| 1996 | 45.7 mm (1.8 in) |
| 1997 | 40.6 mm (1.6 in) |
| 1998 | 35.6 mm (1.4 in) |
| 1999 | 27.9 mm (1.1 in) |
| 2000 | 33.0 mm (1.3 in) |
| 2001 | 22.9 mm (0.9 in) |
| 2002 | 30.5 mm (1.2 in) |
| 2003 | 22.9 mm (0.9 in) |
| 2004 | 25.4 mm (1.0 in) |
| 2005 | 30.5 mm (1.2 in) |
| 2006 | 17.8 mm (0.7 in) |
| 2007 | 40.6 mm (1.6 in) |
| 2008 | 25.4 mm (1.0 in) |
| 2009 | 27.9 mm (1.1 in) |
| 2010 | 27.9 mm (1.1 in) |
| 2011 | 27.9 mm (1.1 in) |
| 2012 | 22.9 mm (0.9 in) |
| 2013 | 22.9 mm (0.9 in) |
| 2014 | 20.3 mm (0.8 in) |
| 2015 | 20.3 mm (0.8 in) |
| 2016 | 27.9 mm (1.1 in) |
| 2017 | 33.0 mm (1.3 in) |
| 2018 | 25.4 mm (1.0 in) |
| 2019 | 27.9 mm (1.1 in) |
| 2020 | 25.4 mm (1.0 in) |
| 2021 | 22.9 mm (0.9 in) |
| 2022 | 40.6 mm (1.6 in) |
| 2023 | 30.5 mm (1.2 in) |
| 2024 | 27.9 mm (1.1 in) |
| 2025 | 40.6 mm (1.6 in) |
| 2026 | 20.3 mm (0.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1987 | 27.8 mm (1.1 in) |
| 1988 | 66.0 mm (2.6 in) |
| 1989 | 45.8 mm (1.8 in) |
| 1990 | 58.4 mm (2.3 in) |
| 1991 | 78.8 mm (3.1 in) |
| 1992 | 58.3 mm (2.3 in) |
| 1993 | 53.3 mm (2.1 in) |
| 1994 | 76.2 mm (3.0 in) |
| 1995 | 55.8 mm (2.2 in) |
| 1996 | 134.5 mm (5.3 in) |
| 1997 | 132.0 mm (5.2 in) |
| 1998 | 88.9 mm (3.5 in) |
| 1999 | 60.9 mm (2.4 in) |
| 2000 | 55.9 mm (2.2 in) |
| 2001 | 53.3 mm (2.1 in) |
| 2002 | 48.2 mm (1.9 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 68.6 mm (2.7 in) |
| 2005 | 68.6 mm (2.7 in) |
| 2006 | 45.7 mm (1.8 in) |
| 2007 | 58.3 mm (2.3 in) |
| 2008 | 53.3 mm (2.1 in) |
| 2009 | 53.4 mm (2.1 in) |
| 2010 | 96.4 mm (3.8 in) |
| 2011 | 60.9 mm (2.4 in) |
| 2012 | 61.0 mm (2.4 in) |
| 2013 | 53.3 mm (2.1 in) |
| 2014 | 71.1 mm (2.8 in) |
| 2015 | 45.7 mm (1.8 in) |
| 2016 | 55.9 mm (2.2 in) |
| 2017 | 86.3 mm (3.4 in) |
| 2018 | 71.1 mm (2.8 in) |
| 2019 | 68.5 mm (2.7 in) |
| 2020 | 48.3 mm (1.9 in) |
| 2021 | 66.0 mm (2.6 in) |
| 2022 | 58.4 mm (2.3 in) |
| 2023 | 53.3 mm (2.1 in) |
| 2024 | 68.5 mm (2.7 in) |
| 2025 | 111.7 mm (4.4 in) |
| 2026 | 43.2 mm (1.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1987 | 22 days |
| 1988 | 37 days |
| 1989 | 18 days |
| 1990 | 31 days |
| 1991 | 23 days |
| 1992 | 25 days |
| 1993 | 39 days |
| 1994 | 83 days |
| 1995 | 13 days |
| 1996 | 24 days |
| 1997 | 17 days |
| 1998 | 22 days |
| 1999 | 22 days |
| 2000 | 12 days |
| 2001 | 27 days |
| 2002 | 33 days |
| 2003 | 16 days |
| 2004 | 21 days |
| 2005 | 18 days |
| 2006 | 22 days |
| 2007 | 12 days |
| 2008 | 19 days |
| 2009 | 23 days |
| 2010 | 16 days |
| 2011 | 14 days |
| 2012 | 21 days |
| 2013 | 15 days |
| 2014 | 16 days |
| 2015 | 20 days |
| 2016 | 23 days |
| 2017 | 14 days |
| 2018 | 20 days |
| 2019 | 21 days |
| 2020 | 25 days |
| 2021 | 38 days |
| 2022 | 18 days |
| 2023 | 14 days |
| 2024 | 26 days |
| 2025 | 12 days |
| 2026 | 21 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
29 years with a frostAcross 29 years with a frost, the median last spring frost at Thumb Divide falls on 27 June and the median first autumn frost on 4 July, which leaves a median of 10 days between them.
Fitted over all years, the growing season changes by -2.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1991 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 27 June | n/a | 27 June | n/a | +2.1 days per decade |
| First autumn frost | 4 July | n/a | 4 July | n/a | +0.2 days per decade |
| Growing days | 10 days | n/a | 10 days | n/a | -2.0 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
37 years, 1988 to 2024A day with at least 27.5 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 49.2 mm (1.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 27.5 mm (1.1 in) | |
| 5 years | 33.1 mm (1.3 in) | |
| 10 years | 36.9 mm (1.5 in) | |
| 25 years | 41.8 mm (1.6 in) | |
| 50 years | 45.5 mm (1.8 in) | Longer than the 37 years of record |
| 100 years | 49.2 mm (1.9 in) | Longer than the 37 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, 37 years of values from 1988 to 2024.
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: 45.7 mm (1.8 in) in 1996; 40.6 mm (1.6 in) in 1997; 40.6 mm (1.6 in) in 2007.
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).