Mason Weather Records (USC00415650)
Record envelope, standing records and threshold days for Mason (USC00415650), Texas, United States, with 86 years of record.
Key Facts for Mason
- Mason (USC00415650) is a weather station in Texas, United States at 30.75 latitude and -99.23 longitude, 467 m (1,531 ft) above sea level.
- The station reports from 1941 to 2026, 86 years of record.
- 1,464 records set at Mason still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Mason set a daily record high maximum temperature of 41.1 C (106.0 F) on 25 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Texas, United States, 30.75 latitude, -99.23 longitude.
- Elevation: 467 m (1,531 ft).
- Period of record: 1941 to 2026, 86 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
17 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 32.2 C (90.0 F) | -14.4 C (6.1 F) | 28.9 C (84.0 F) | -9.4 C (15.1 F) |
| Feb | 37.8 C (100.0 F) | -16.1 C (3.0 F) | 32.8 C (91.0 F) | -6.1 C (21.0 F) |
| Mar | 37.2 C (99.0 F) | -11.7 C (10.9 F) | 37.2 C (99.0 F) | -1.7 C (28.9 F) |
| Apr | 38.3 C (100.9 F) | -3.9 C (25.0 F) | 35.6 C (96.1 F) | 5.6 C (42.1 F) |
| May | 42.2 C (108.0 F) | 2.2 C (36.0 F) | 35.0 C (95.0 F) | 8.3 C (46.9 F) |
| Jun | 43.9 C (111.0 F) | 7.8 C (46.0 F) | 38.9 C (102.0 F) | 18.9 C (66.0 F) |
| Jul | 43.9 C (111.0 F) | 12.2 C (54.0 F) | 38.9 C (102.0 F) | 18.9 C (66.0 F) |
| Aug | 43.3 C (109.9 F) | 10.6 C (51.1 F) | 41.1 C (106.0 F) | 18.9 C (66.0 F) |
| Sep | 42.8 C (109.0 F) | 2.2 C (36.0 F) | 36.1 C (97.0 F) | 20.0 C (68.0 F) |
| Oct | 38.9 C (102.0 F) | -3.3 C (26.1 F) | n/a | n/a |
| Nov | 33.9 C (93.0 F) | -10.0 C (14.0 F) | n/a | n/a |
| Dec | 31.1 C (88.0 F) | -16.1 C (3.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1957 | 29 |
| 1958 | 10 |
| 1959 | 19 |
| 1960 | 15 |
| 1961 | 12 |
| 1962 | 19 |
| 1963 | 15 |
| 1964 | 27 |
| 1965 | 30 |
| 1966 | 28 |
| 1967 | 26 |
| 1968 | 16 |
| 1969 | 20 |
| 1970 | 27 |
| 1971 | 24 |
| 1972 | 13 |
| 1973 | 14 |
| 1974 | 34 |
| 1975 | 4 |
| 1976 | 31 |
| 1977 | 15 |
| 1978 | 17 |
| 1979 | 24 |
| 1980 | 22 |
| 1981 | 21 |
| 1982 | 24 |
| 1983 | 29 |
| 1984 | 35 |
| 1985 | 25 |
| 1986 | 22 |
| 1987 | 19 |
| 1988 | 12 |
| 1989 | 30 |
| 1990 | 13 |
| 1991 | 9 |
| 1992 | 13 |
| 1993 | 14 |
| 1994 | 10 |
| 1995 | 13 |
| 1996 | 21 |
| 1997 | 4 |
| 1998 | 38 |
| 1999 | 11 |
| 2000 | 25 |
| 2001 | 7 |
| 2002 | 15 |
| 2003 | 12 |
| 2004 | 11 |
| 2005 | 23 |
| 2006 | 22 |
| 2007 | 19 |
| 2008 | 12 |
| 2009 | 5 |
| 2010 | 19 |
| 2011 | 41 |
| 2012 | 14 |
| 2013 | 25 |
| 2014 | 10 |
| 2015 | 11 |
| 2016 | 13 |
| 2017 | 11 |
| 2018 | 25 |
| 2019 | 25 |
| 2020 | 23 |
| 2021 | 35 |
| 2022 | 40 |
| 2023 | 70 |
| 2024 | 34 |
| 2025 | 37 |
| 2026 | 26 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1973-02-09 | Record snow depth | Record snow depth 22.9 cm (9.0 in) |
| 2018-07-24 | Record high maximum temperature | Record high maximum temperature 43.9 C (111.0 F) |
Wettest Day of Each Month
Sep: 189.2 mm (7.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 76.2 mm (3.0 in) | 20 January 1968 |
| Feb | 128.3 mm (5.1 in) | 20 February 1997 |
| Mar | 65.0 mm (2.6 in) | 7 March 1970 |
| Apr | 93.7 mm (3.7 in) | 16 April 2010 |
| May | 143.5 mm (5.6 in) | 25 May 2010 |
| Jun | 155.2 mm (6.1 in) | 5 June 1942 |
| Jul | 101.6 mm (4.0 in) | 25 July 2007 |
| Aug | 113.0 mm (4.4 in) | 2 August 1978 |
| Sep | 189.2 mm (7.4 in) | 10 September 1952 |
| Oct | 181.9 mm (7.2 in) | 5 October 1969 |
| Nov | 86.4 mm (3.4 in) | 4 November 2000 |
| Dec | 71.1 mm (2.8 in) | 28 December 1994 |
Period of Record Coverage
1957 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1957 | 364 | 100% | Yes |
| 1958 | 353 | 97% | Yes |
| 1959 | 359 | 98% | Yes |
| 1960 | 350 | 96% | Yes |
| 1961 | 320 | 88% | No |
| 1962 | 217 | 59% | No |
| 1963 | 281 | 77% | No |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 338 | 93% | Yes |
| 1967 | 347 | 95% | Yes |
| 1968 | 340 | 93% | Yes |
| 1969 | 325 | 89% | No |
| 1970 | 337 | 92% | Yes |
| 1971 | 308 | 84% | No |
| 1972 | 245 | 67% | No |
| 1973 | 161 | 44% | No |
| 1974 | 322 | 88% | No |
| 1975 | 57 | 16% | No |
| 1976 | 351 | 96% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 361 | 99% | Yes |
| 1984 | 301 | 82% | No |
| 1985 | 300 | 82% | No |
| 1986 | 304 | 83% | No |
| 1987 | 274 | 75% | No |
| 1988 | 243 | 66% | No |
| 1989 | 247 | 68% | No |
| 1990 | 248 | 68% | No |
| 1991 | 245 | 67% | No |
| 1992 | 251 | 69% | No |
| 1993 | 252 | 69% | No |
| 1994 | 250 | 68% | No |
| 1995 | 222 | 61% | No |
| 1996 | 238 | 65% | No |
| 1997 | 241 | 66% | No |
| 1998 | 245 | 67% | No |
| 1999 | 336 | 92% | Yes |
| 2000 | 323 | 88% | No |
| 2001 | 300 | 82% | No |
| 2002 | 328 | 90% | No |
| 2003 | 330 | 90% | Yes |
| 2004 | 288 | 79% | No |
| 2005 | 341 | 93% | Yes |
| 2006 | 298 | 82% | No |
| 2007 | 361 | 99% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 120 | 33% | No |
| 2010 | 358 | 98% | Yes |
| 2011 | 361 | 99% | Yes |
| 2012 | 361 | 99% | Yes |
| 2013 | 360 | 99% | Yes |
| 2014 | 350 | 96% | Yes |
| 2015 | 353 | 97% | Yes |
| 2016 | 361 | 99% | Yes |
| 2017 | 354 | 97% | Yes |
| 2018 | 357 | 98% | Yes |
| 2019 | 355 | 97% | Yes |
| 2020 | 334 | 91% | Yes |
| 2021 | 356 | 98% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 363 | 99% | Yes |
| 2024 | 365 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 245 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 25 August 2026 | Mason, US | daily high max (Provisional) | 41.1 C (106.0 F) | 0.5 C (0.9 F) | 16 years | 12 of 100 (Routine) |
| 24 August 2026 | Mason, US | daily high min (Provisional) | 25.0 C (77.0 F) | 1.1 C (2.0 F) | 28 years | 19 of 100 (Routine) |
| 24 August 2026 | Mason, US | daily high max (Tie, Provisional) | 41.1 C (106.0 F) | tie | 1 year | 1 of 100 (Routine) |
| 8 June 2026 | Mason, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 32 years | 18 of 100 (Routine) |
| 18 May 2026 | Mason, US | daily high min | 23.9 C (75.0 F) | 1.7 C (3.1 F) | 12 years | 14 of 100 (Routine) |
| 8 May 2026 | Mason, US | daily low max | 16.1 C (61.0 F) | 2.8 C (5.0 F) | 49 years | 27 of 100 (Routine) |
| 1 May 2026 | Mason, US | daily low max (Tie) | 16.1 C (61.0 F) | tie | 68 years | 6 of 100 (Routine) |
| 28 April 2026 | Mason, US | daily high min | 22.2 C (72.0 F) | 2.8 C (5.0 F) | 68 years | 32 of 100 (Routine) |
| 28 April 2026 | Mason, US | daily high max (Tie) | 35.0 C (95.0 F) | tie | 13 years | 2 of 100 (Routine) |
| 27 April 2026 | Mason, US | monthly high min | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 4 years | 20 of 100 (Routine) |
| 24 April 2026 | Mason, US | daily high max (Tie) | 34.4 C (93.9 F) | tie | 15 years | 2 of 100 (Routine) |
| 23 April 2026 | Mason, US | daily high min | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 4 years | 10 of 100 (Routine) |
| 20 April 2026 | Mason, US | daily low max (Tie) | 13.9 C (57.0 F) | tie | 16 years | 2 of 100 (Routine) |
| 15 April 2026 | Mason, US | daily high min | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 1 year | 9 of 100 (Routine) |
| 14 April 2026 | Mason, US | daily high min | 21.1 C (70.0 F) | 1.1 C (2.0 F) | 13 years | 13 of 100 (Routine) |
| 4 April 2026 | Mason, US | daily high min | 21.7 C (71.1 F) | 2.3 C (4.1 F) | 60 years | 29 of 100 (Routine) |
| 2 April 2026 | Mason, US | daily rain | 55.4 mm (2.2 in) | 26.4 mm (1.0 in) | 8 years | 29 of 100 (Routine) |
| 23 March 2026 | Mason, US | daily high max | 35.6 C (96.1 F) | 1.7 C (3.1 F) | 31 years | 18 of 100 (Routine) |
| 22 March 2026 | Mason, US | monthly high max | 37.2 C (99.0 F) | 0.5 C (0.9 F) | 54 years | 33 of 100 (Routine) |
| 21 March 2026 | Mason, US | daily high max | 35.6 C (96.1 F) | 2.3 C (4.1 F) | 32 years | 19 of 100 (Routine) |
Climate Trend
44 complete years, 1957 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1957 | 19.1 C | +0.52 C |
| 1958 | 18.4 C | -0.21 C |
| 1959 | 18.8 C | +0.17 C |
| 1960 | 18.8 C | +0.21 C |
| 1961 | 18.6 C | +0.02 C |
| 1964 | 18.2 C | -0.44 C |
| 1965 | 18.0 C | -0.64 C |
| 1966 | 17.2 C | -1.45 C |
| 1967 | 18.3 C | -0.32 C |
| 1968 | 17.0 C | -1.66 C |
| 1969 | 17.7 C | -0.87 C |
| 1970 | 17.5 C | -1.13 C |
| 1977 | 18.6 C | +0.03 C |
| 1978 | 17.6 C | -1.04 C |
| 1979 | 17.3 C | -1.30 C |
| 1980 | 18.4 C | -0.25 C |
| 1981 | 18.3 C | -0.33 C |
| 1982 | 18.3 C | -0.35 C |
| 1983 | 17.4 C | -1.24 C |
| 1984 | 18.6 C | -0.05 C |
| 1986 | 18.8 C | +0.23 C |
| 1987 | 17.6 C | -1.05 C |
| 1999 | 18.9 C | +0.29 C |
| 2000 | 18.9 C | +0.27 C |
| 2002 | 17.8 C | -0.79 C |
| 2005 | 18.2 C | -0.37 C |
| 2007 | 17.5 C | -1.14 C |
| 2008 | 18.1 C | -0.52 C |
| 2010 | 18.4 C | -0.22 C |
| 2011 | 20.0 C | +1.36 C |
| 2012 | 19.8 C | +1.19 C |
| 2013 | 18.5 C | -0.15 C |
| 2014 | 18.4 C | -0.26 C |
| 2015 | 18.8 C | +0.17 C |
| 2016 | 19.5 C | +0.85 C |
| 2017 | 19.7 C | +1.12 C |
| 2018 | 19.0 C | +0.36 C |
| 2019 | 19.0 C | +0.35 C |
| 2020 | 19.4 C | +0.81 C |
| 2021 | 19.2 C | +0.56 C |
| 2022 | 20.0 C | +1.40 C |
| 2023 | 20.7 C | +2.04 C |
| 2024 | 20.9 C | +2.26 C |
| 2025 | 20.3 C | +1.73 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1957 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 44 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 | 1957 to 2025 | 44 | Rise |
| Mean daily maximum | 0.3 C (0.1 to 0.4) per decade | 0.5 F (0.2 to 0.7) per decade | 1957 to 2025 | 44 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1957 to 2025 | 44 | 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
1941 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.9 C (111.0 F) | 2018 | 40.0 C (104.0 F) | 70 |
| Coldest night (TNn) | -16.1 C (3.0 F) | 1983 | -9.4 C (15.1 F) | 70 |
| Wettest day (Rx1day) | 189.2 mm (7.4 in) | 1952 | 66.2 mm (2.6 in) | 86 |
| Wettest five days (Rx5day) | 230.1 mm (9.1 in) | 1961 | 97.8 mm (3.9 in) | 85 |
| Longest dry spell (CDD) | 87 days | 1966 | 37 days | 86 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | 41.1 C (106.0 F) |
| 1958 | 38.9 C (102.0 F) |
| 1959 | 40.0 C (104.0 F) |
| 1960 | 42.2 C (108.0 F) |
| 1961 | 37.8 C (100.0 F) |
| 1962 | 42.8 C (109.0 F) |
| 1963 | 40.0 C (104.0 F) |
| 1964 | 40.6 C (105.1 F) |
| 1965 | 38.9 C (102.0 F) |
| 1966 | 40.0 C (104.0 F) |
| 1967 | 39.4 C (102.9 F) |
| 1968 | 38.9 C (102.0 F) |
| 1969 | 42.2 C (108.0 F) |
| 1970 | 39.4 C (102.9 F) |
| 1971 | 38.3 C (100.9 F) |
| 1972 | 40.0 C (104.0 F) |
| 1973 | 36.7 C (98.1 F) |
| 1974 | 38.9 C (102.0 F) |
| 1975 | 30.6 C (87.1 F) |
| 1976 | 37.8 C (100.0 F) |
| 1977 | 40.0 C (104.0 F) |
| 1978 | 40.6 C (105.1 F) |
| 1979 | 37.8 C (100.0 F) |
| 1980 | 41.1 C (106.0 F) |
| 1981 | 37.2 C (99.0 F) |
| 1982 | 38.9 C (102.0 F) |
| 1983 | 37.8 C (100.0 F) |
| 1984 | 40.6 C (105.1 F) |
| 1985 | 40.0 C (104.0 F) |
| 1986 | 40.0 C (104.0 F) |
| 1987 | 40.0 C (104.0 F) |
| 1988 | 39.4 C (102.9 F) |
| 1989 | 40.6 C (105.1 F) |
| 1990 | 37.8 C (100.0 F) |
| 1991 | 38.3 C (100.9 F) |
| 1992 | 37.8 C (100.0 F) |
| 1993 | 40.0 C (104.0 F) |
| 1994 | 41.1 C (106.0 F) |
| 1995 | 40.6 C (105.1 F) |
| 1996 | 41.1 C (106.0 F) |
| 1997 | 38.3 C (100.9 F) |
| 1998 | 41.7 C (107.1 F) |
| 1999 | 39.4 C (102.9 F) |
| 2000 | 42.2 C (108.0 F) |
| 2001 | 38.3 C (100.9 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 40.0 C (104.0 F) |
| 2004 | 38.3 C (100.9 F) |
| 2005 | 41.1 C (106.0 F) |
| 2006 | 40.0 C (104.0 F) |
| 2007 | 35.0 C (95.0 F) |
| 2008 | 39.4 C (102.9 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 40.6 C (105.1 F) |
| 2011 | 42.2 C (108.0 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 41.1 C (106.0 F) |
| 2014 | 39.4 C (102.9 F) |
| 2015 | 40.0 C (104.0 F) |
| 2016 | 41.1 C (106.0 F) |
| 2017 | 40.6 C (105.1 F) |
| 2018 | 43.9 C (111.0 F) |
| 2019 | 40.0 C (104.0 F) |
| 2020 | 42.8 C (109.0 F) |
| 2021 | 39.4 C (102.9 F) |
| 2022 | 43.9 C (111.0 F) |
| 2023 | 43.9 C (111.0 F) |
| 2024 | 42.8 C (109.0 F) |
| 2025 | 41.1 C (106.0 F) |
| 2026 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | -8.3 C (17.1 F) |
| 1958 | -8.9 C (16.0 F) |
| 1959 | -11.7 C (10.9 F) |
| 1960 | -9.4 C (15.1 F) |
| 1961 | -7.8 C (18.0 F) |
| 1962 | -12.2 C (10.0 F) |
| 1963 | -11.7 C (10.9 F) |
| 1964 | -13.3 C (8.1 F) |
| 1965 | -7.8 C (18.0 F) |
| 1966 | -11.1 C (12.0 F) |
| 1967 | -11.7 C (10.9 F) |
| 1968 | -8.3 C (17.1 F) |
| 1969 | -8.9 C (16.0 F) |
| 1970 | -13.9 C (7.0 F) |
| 1971 | -11.7 C (10.9 F) |
| 1972 | -12.8 C (9.0 F) |
| 1973 | -13.3 C (8.1 F) |
| 1974 | -9.4 C (15.1 F) |
| 1975 | -11.7 C (10.9 F) |
| 1976 | -10.0 C (14.0 F) |
| 1977 | -10.6 C (12.9 F) |
| 1978 | -11.1 C (12.0 F) |
| 1979 | -13.3 C (8.1 F) |
| 1980 | -11.7 C (10.9 F) |
| 1981 | -11.1 C (12.0 F) |
| 1982 | -14.4 C (6.1 F) |
| 1983 | -16.1 C (3.0 F) |
| 1984 | -12.8 C (9.0 F) |
| 1985 | -16.1 C (3.0 F) |
| 1986 | -6.7 C (19.9 F) |
| 1987 | -7.8 C (18.0 F) |
| 1988 | -9.4 C (15.1 F) |
| 1989 | -15.0 C (5.0 F) |
| 1990 | -14.4 C (6.1 F) |
| 1991 | -7.8 C (18.0 F) |
| 1992 | -7.8 C (18.0 F) |
| 1993 | -8.9 C (16.0 F) |
| 1994 | -8.9 C (16.0 F) |
| 1995 | -8.3 C (17.1 F) |
| 1996 | -12.8 C (9.0 F) |
| 1997 | -7.8 C (18.0 F) |
| 1998 | -7.2 C (19.0 F) |
| 1999 | -6.7 C (19.9 F) |
| 2000 | -8.3 C (17.1 F) |
| 2001 | -6.1 C (21.0 F) |
| 2002 | -10.0 C (14.0 F) |
| 2003 | -8.3 C (17.1 F) |
| 2004 | -8.3 C (17.1 F) |
| 2005 | -10.6 C (12.9 F) |
| 2006 | -7.8 C (18.0 F) |
| 2007 | -9.4 C (15.1 F) |
| 2008 | -9.4 C (15.1 F) |
| 2009 | -6.7 C (19.9 F) |
| 2010 | -12.2 C (10.0 F) |
| 2011 | -11.1 C (12.0 F) |
| 2012 | -6.7 C (19.9 F) |
| 2013 | -6.7 C (19.9 F) |
| 2014 | -10.6 C (12.9 F) |
| 2015 | -7.8 C (18.0 F) |
| 2016 | -8.3 C (17.1 F) |
| 2017 | -9.4 C (15.1 F) |
| 2018 | -12.8 C (9.0 F) |
| 2019 | -7.2 C (19.0 F) |
| 2020 | -5.0 C (23.0 F) |
| 2021 | -15.6 C (3.9 F) |
| 2022 | -11.7 C (10.9 F) |
| 2023 | -3.9 C (25.0 F) |
| 2024 | -10.6 C (12.9 F) |
| 2025 | -10.0 C (14.0 F) |
| 2026 | -9.4 C (15.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1941 | 7.4 mm (0.29 in) |
| 1942 | 155.2 mm (6.1 in) |
| 1943 | 105.4 mm (4.1 in) |
| 1944 | 45.0 mm (1.8 in) |
| 1945 | 45.0 mm (1.8 in) |
| 1946 | 49.8 mm (2.0 in) |
| 1947 | 47.0 mm (1.9 in) |
| 1948 | 71.4 mm (2.8 in) |
| 1949 | 72.6 mm (2.9 in) |
| 1950 | 55.9 mm (2.2 in) |
| 1951 | 36.6 mm (1.4 in) |
| 1952 | 189.2 mm (7.4 in) |
| 1953 | 46.2 mm (1.8 in) |
| 1954 | 53.3 mm (2.1 in) |
| 1955 | 40.4 mm (1.6 in) |
| 1956 | 68.6 mm (2.7 in) |
| 1957 | 143.3 mm (5.6 in) |
| 1958 | 43.4 mm (1.7 in) |
| 1959 | 52.6 mm (2.1 in) |
| 1960 | 72.6 mm (2.9 in) |
| 1961 | 106.7 mm (4.2 in) |
| 1962 | 57.2 mm (2.3 in) |
| 1963 | 90.2 mm (3.6 in) |
| 1964 | 88.9 mm (3.5 in) |
| 1965 | 64.3 mm (2.5 in) |
| 1966 | 67.1 mm (2.6 in) |
| 1967 | 100.3 mm (3.9 in) |
| 1968 | 76.2 mm (3.0 in) |
| 1969 | 181.9 mm (7.2 in) |
| 1970 | 66.0 mm (2.6 in) |
| 1971 | 69.6 mm (2.7 in) |
| 1972 | 96.0 mm (3.8 in) |
| 1973 | 93.2 mm (3.7 in) |
| 1974 | 104.1 mm (4.1 in) |
| 1975 | 26.7 mm (1.1 in) |
| 1976 | 73.7 mm (2.9 in) |
| 1977 | 63.5 mm (2.5 in) |
| 1978 | 113.0 mm (4.4 in) |
| 1979 | 42.2 mm (1.7 in) |
| 1980 | 129.5 mm (5.1 in) |
| 1981 | 81.3 mm (3.2 in) |
| 1982 | 41.4 mm (1.6 in) |
| 1983 | 43.7 mm (1.7 in) |
| 1984 | 50.8 mm (2.0 in) |
| 1985 | 44.2 mm (1.7 in) |
| 1986 | 82.6 mm (3.3 in) |
| 1987 | 67.3 mm (2.6 in) |
| 1988 | 66.3 mm (2.6 in) |
| 1989 | 94.0 mm (3.7 in) |
| 1990 | 50.3 mm (2.0 in) |
| 1991 | 91.4 mm (3.6 in) |
| 1992 | 64.8 mm (2.6 in) |
| 1993 | 63.5 mm (2.5 in) |
| 1994 | 71.1 mm (2.8 in) |
| 1995 | 45.7 mm (1.8 in) |
| 1996 | 44.2 mm (1.7 in) |
| 1997 | 128.3 mm (5.1 in) |
| 1998 | 62.7 mm (2.5 in) |
| 1999 | 30.2 mm (1.2 in) |
| 2000 | 95.3 mm (3.8 in) |
| 2001 | 50.8 mm (2.0 in) |
| 2002 | 61.2 mm (2.4 in) |
| 2003 | 101.9 mm (4.0 in) |
| 2004 | 63.0 mm (2.5 in) |
| 2005 | 49.5 mm (1.9 in) |
| 2006 | 38.9 mm (1.5 in) |
| 2007 | 139.7 mm (5.5 in) |
| 2008 | 79.5 mm (3.1 in) |
| 2009 | 52.6 mm (2.1 in) |
| 2010 | 143.5 mm (5.6 in) |
| 2011 | 97.8 mm (3.9 in) |
| 2012 | 47.0 mm (1.9 in) |
| 2013 | 60.7 mm (2.4 in) |
| 2014 | 67.6 mm (2.7 in) |
| 2015 | 91.4 mm (3.6 in) |
| 2016 | 75.2 mm (3.0 in) |
| 2017 | 59.9 mm (2.4 in) |
| 2018 | 92.2 mm (3.6 in) |
| 2019 | 80.3 mm (3.2 in) |
| 2020 | 34.3 mm (1.4 in) |
| 2021 | 54.6 mm (2.1 in) |
| 2022 | 53.3 mm (2.1 in) |
| 2023 | 55.9 mm (2.2 in) |
| 2024 | 78.7 mm (3.1 in) |
| 2025 | 101.6 mm (4.0 in) |
| 2026 | 55.4 mm (2.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1941 | 10.4 mm (0.4 in) |
| 1942 | 160.5 mm (6.3 in) |
| 1943 | 201.9 mm (7.9 in) |
| 1944 | 74.7 mm (2.9 in) |
| 1945 | 54.3 mm (2.1 in) |
| 1946 | 68.6 mm (2.7 in) |
| 1947 | 61.7 mm (2.4 in) |
| 1948 | 118.9 mm (4.7 in) |
| 1949 | 88.6 mm (3.5 in) |
| 1950 | 82.6 mm (3.3 in) |
| 1951 | 36.6 mm (1.4 in) |
| 1952 | 226.0 mm (8.9 in) |
| 1953 | 87.6 mm (3.4 in) |
| 1954 | 54.8 mm (2.2 in) |
| 1955 | 71.7 mm (2.8 in) |
| 1956 | 107.0 mm (4.2 in) |
| 1957 | 187.7 mm (7.4 in) |
| 1958 | 76.2 mm (3.0 in) |
| 1959 | 115.1 mm (4.5 in) |
| 1960 | 147.8 mm (5.8 in) |
| 1961 | 230.1 mm (9.1 in) |
| 1962 | 91.7 mm (3.6 in) |
| 1963 | 90.2 mm (3.6 in) |
| 1964 | 163.4 mm (6.4 in) |
| 1965 | 86.9 mm (3.4 in) |
| 1966 | 88.5 mm (3.5 in) |
| 1967 | 100.3 mm (3.9 in) |
| 1968 | 158.7 mm (6.2 in) |
| 1969 | 181.9 mm (7.2 in) |
| 1970 | 103.1 mm (4.1 in) |
| 1971 | 129.3 mm (5.1 in) |
| 1972 | 124.4 mm (4.9 in) |
| 1973 | 138.7 mm (5.5 in) |
| 1974 | 137.9 mm (5.4 in) |
| 1975 | 62.4 mm (2.5 in) |
| 1976 | 116.1 mm (4.6 in) |
| 1977 | 88.9 mm (3.5 in) |
| 1978 | 158.7 mm (6.2 in) |
| 1979 | 60.5 mm (2.4 in) |
| 1980 | 160.0 mm (6.3 in) |
| 1981 | 108.2 mm (4.3 in) |
| 1982 | 69.6 mm (2.7 in) |
| 1983 | 72.5 mm (2.9 in) |
| 1984 | 77.3 mm (3.0 in) |
| 1985 | 47.3 mm (1.9 in) |
| 1986 | 102.9 mm (4.1 in) |
| 1987 | 131.6 mm (5.2 in) |
| 1988 | 68.6 mm (2.7 in) |
| 1989 | 103.9 mm (4.1 in) |
| 1990 | 53.3 mm (2.1 in) |
| 1991 | 120.6 mm (4.7 in) |
| 1992 | 73.4 mm (2.9 in) |
| 1993 | 65.5 mm (2.6 in) |
| 1994 | 112.1 mm (4.4 in) |
| 1995 | 129.5 mm (5.1 in) |
| 1996 | 58.4 mm (2.3 in) |
| 1997 | 151.2 mm (6.0 in) |
| 1998 | 94.2 mm (3.7 in) |
| 1999 | 47.6 mm (1.9 in) |
| 2000 | 196.2 mm (7.7 in) |
| 2001 | 98.1 mm (3.9 in) |
| 2002 | 125.2 mm (4.9 in) |
| 2003 | 137.7 mm (5.4 in) |
| 2004 | 82.5 mm (3.2 in) |
| 2005 | 59.4 mm (2.3 in) |
| 2006 | 66.8 mm (2.6 in) |
| 2007 | 190.2 mm (7.5 in) |
| 2008 | 81.5 mm (3.2 in) |
| 2009 | 92.2 mm (3.6 in) |
| 2010 | 144.1 mm (5.7 in) |
| 2011 | 99.7 mm (3.9 in) |
| 2012 | 67.1 mm (2.6 in) |
| 2013 | 72.1 mm (2.8 in) |
| 2014 | 90.2 mm (3.6 in) |
| 2015 | 111.0 mm (4.4 in) |
| 2016 | 137.4 mm (5.4 in) |
| 2017 | 80.2 mm (3.2 in) |
| 2018 | 180.6 mm (7.1 in) |
| 2019 | 80.3 mm (3.2 in) |
| 2020 | 73.1 mm (2.9 in) |
| 2021 | 110.0 mm (4.3 in) |
| 2022 | 93.9 mm (3.7 in) |
| 2023 | 100.3 mm (3.9 in) |
| 2024 | 97.8 mm (3.9 in) |
| 2025 | 101.6 mm (4.0 in) |
| 2026 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1941 | 20 days |
| 1942 | 38 days |
| 1943 | 52 days |
| 1944 | 40 days |
| 1945 | 24 days |
| 1946 | 65 days |
| 1947 | 31 days |
| 1948 | 24 days |
| 1949 | 39 days |
| 1950 | 72 days |
| 1951 | 43 days |
| 1952 | 45 days |
| 1953 | 44 days |
| 1954 | 42 days |
| 1955 | 30 days |
| 1956 | 56 days |
| 1957 | 60 days |
| 1958 | 28 days |
| 1959 | 33 days |
| 1960 | 30 days |
| 1961 | 34 days |
| 1962 | 45 days |
| 1963 | 33 days |
| 1964 | 54 days |
| 1965 | 26 days |
| 1966 | 87 days |
| 1967 | 30 days |
| 1968 | 33 days |
| 1969 | 33 days |
| 1970 | 57 days |
| 1971 | 44 days |
| 1972 | 37 days |
| 1973 | 28 days |
| 1974 | 29 days |
| 1975 | 24 days |
| 1976 | 31 days |
| 1977 | 35 days |
| 1978 | 37 days |
| 1979 | 36 days |
| 1980 | 46 days |
| 1981 | 37 days |
| 1982 | 35 days |
| 1983 | 20 days |
| 1984 | 20 days |
| 1985 | 52 days |
| 1986 | 39 days |
| 1987 | 26 days |
| 1988 | 41 days |
| 1989 | 25 days |
| 1990 | 42 days |
| 1991 | 37 days |
| 1992 | 41 days |
| 1993 | 65 days |
| 1994 | 37 days |
| 1995 | 24 days |
| 1996 | 33 days |
| 1997 | 25 days |
| 1998 | 48 days |
| 1999 | 40 days |
| 2000 | 42 days |
| 2001 | 41 days |
| 2002 | 29 days |
| 2003 | 39 days |
| 2004 | 23 days |
| 2005 | 43 days |
| 2006 | 37 days |
| 2007 | 30 days |
| 2008 | 35 days |
| 2009 | 27 days |
| 2010 | 49 days |
| 2011 | 38 days |
| 2012 | 42 days |
| 2013 | 23 days |
| 2014 | 34 days |
| 2015 | 39 days |
| 2016 | 26 days |
| 2017 | 35 days |
| 2018 | 49 days |
| 2019 | 22 days |
| 2020 | 27 days |
| 2021 | 43 days |
| 2022 | 38 days |
| 2023 | 39 days |
| 2024 | 54 days |
| 2025 | 26 days |
| 2026 | 4 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
44 years with a frostAcross 44 years with a frost, the median last spring frost at Mason falls on 22 March and the median first autumn frost on 11 November, which leaves a median of 236 days between them.
Fitted over all years, the growing season changes by +5.3 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1979 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 22 March | n/a | 12 March | n/a | -3.7 days per decade |
| First autumn frost | 11 November | n/a | 13 November | n/a | +1.6 days per decade |
| Growing days | 236 days | n/a | 240 days | n/a | +5.3 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, 1942 to 2022A day with at least 69.8 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 208.0 mm (8.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 69.8 mm (2.7 in) | |
| 5 years | 100.0 mm (3.9 in) | |
| 10 years | 122.4 mm (4.8 in) | |
| 25 years | 154.0 mm (6.1 in) | |
| 50 years | 179.9 mm (7.1 in) | |
| 100 years | 208.0 mm (8.2 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 1942 to 2022.
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: 189.2 mm (7.4 in) in 1952; 181.9 mm (7.2 in) in 1969; 155.2 mm (6.1 in) in 1942.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Mason, at 2010. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2010 ran 0.3 C (0.6 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2010 | +0.3 | +0.6 | 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
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Mason had a mean temperature of 19.5 C (67.2 F) and 611.9 mm (24.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Paint Rock (United States, 107 km away), Camp Wood (United States, 141 km away) and Carta Valley (United States, 175 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Paint Rock | United States | 107 km (66 mi) | 19.0 C (66.2 F) | 643.2 mm (25.3 in) | 0.82 |
| Camp Wood | United States | 141 km (88 mi) | 19.2 C (66.5 F) | 694.1 mm (27.3 in) | 0.82 |
| Carta Valley | United States | 175 km (109 mi) | 19.4 C (67.0 F) | 559.8 mm (22.0 in) | 0.84 |
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).