Trona Weather Records (USC00049035)
Record envelope, standing records and threshold days for Trona (USC00049035), California, United States, with 107 years of record.
Key Facts for Trona
- Trona (USC00049035) is a weather station in California, United States at 35.76 latitude and -117.39 longitude, 517 m (1,695 ft) above sea level.
- The station reports from 1920 to 2026, 107 years of record.
- 1,464 records set at Trona still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Trona tied a daily record precipitation of 2.5 mm (0.10 in) on 12 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: California, United States, 35.76 latitude, -117.39 longitude.
- Elevation: 517 m (1,695 ft).
- Period of record: 1920 to 2026, 107 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
26 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 28.3 C (82.9 F) | -12.2 C (10.0 F) | 20.0 C (68.0 F) | -1.1 C (30.0 F) |
| Feb | 31.7 C (89.1 F) | -13.9 C (7.0 F) | 31.7 C (89.1 F) | 0.0 C (32.0 F) |
| Mar | 36.7 C (98.1 F) | -6.7 C (19.9 F) | 36.7 C (98.1 F) | 5.0 C (41.0 F) |
| Apr | 38.9 C (102.0 F) | -3.9 C (25.0 F) | 33.3 C (91.9 F) | 6.7 C (44.1 F) |
| May | 43.9 C (111.0 F) | 2.2 C (36.0 F) | 41.1 C (106.0 F) | 10.6 C (51.1 F) |
| Jun | 47.8 C (118.0 F) | 5.0 C (41.0 F) | 42.8 C (109.0 F) | 12.2 C (54.0 F) |
| Jul | 48.3 C (118.9 F) | 12.2 C (54.0 F) | 45.0 C (113.0 F) | 16.1 C (61.0 F) |
| Aug | 47.8 C (118.0 F) | 10.0 C (50.0 F) | 46.1 C (115.0 F) | 21.7 C (71.1 F) |
| Sep | 46.7 C (116.1 F) | 4.4 C (39.9 F) | 42.8 C (109.0 F) | 16.1 C (61.0 F) |
| Oct | 41.7 C (107.1 F) | -5.0 C (23.0 F) | 41.1 C (106.0 F) | 15.6 C (60.1 F) |
| Nov | 35.6 C (96.1 F) | -13.9 C (7.0 F) | n/a | n/a |
| Dec | 28.3 C (82.9 F) | -13.3 C (8.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1920 | 14 |
| 1921 | 13 |
| 1922 | 23 |
| 1923 | 17 |
| 1924 | 23 |
| 1925 | 17 |
| 1926 | 6 |
| 1927 | 15 |
| 1928 | 9 |
| 1929 | 12 |
| 1930 | 18 |
| 1932 | 11 |
| 1933 | 14 |
| 1934 | 16 |
| 1935 | 11 |
| 1936 | 7 |
| 1937 | 23 |
| 1938 | 10 |
| 1939 | 10 |
| 1940 | 11 |
| 1941 | 12 |
| 1942 | 12 |
| 1943 | 11 |
| 1944 | 8 |
| 1945 | 11 |
| 1946 | 9 |
| 1947 | 16 |
| 1948 | 14 |
| 1949 | 31 |
| 1950 | 36 |
| 1951 | 8 |
| 1952 | 12 |
| 1953 | 10 |
| 1954 | 11 |
| 1955 | 8 |
| 1956 | 7 |
| 1957 | 11 |
| 1958 | 6 |
| 1959 | 7 |
| 1960 | 5 |
| 1961 | 8 |
| 1962 | 11 |
| 1963 | 9 |
| 1964 | 16 |
| 1965 | 6 |
| 1966 | 13 |
| 1967 | 12 |
| 1968 | 13 |
| 1969 | 4 |
| 1970 | 10 |
| 1971 | 14 |
| 1972 | 14 |
| 1973 | 5 |
| 1974 | 5 |
| 1975 | 11 |
| 1976 | 12 |
| 1977 | 7 |
| 1978 | 5 |
| 1979 | 5 |
| 1980 | 10 |
| 1981 | 6 |
| 1982 | 16 |
| 1983 | 12 |
| 1984 | 15 |
| 1985 | 16 |
| 1986 | 14 |
| 1987 | 16 |
| 1988 | 11 |
| 1989 | 27 |
| 1990 | 10 |
| 1991 | 8 |
| 1992 | 20 |
| 1993 | 5 |
| 1994 | 25 |
| 1995 | 20 |
| 1996 | 77 |
| 1997 | 47 |
| 1998 | 45 |
| 1999 | 12 |
| 2000 | 17 |
| 2001 | 31 |
| 2002 | 61 |
| 2003 | 80 |
| 2004 | 20 |
| 2005 | 2 |
| 2006 | 1 |
| 2007 | 11 |
| 2008 | 5 |
| 2009 | 2 |
| 2010 | 4 |
| 2011 | 4 |
| 2012 | 4 |
| 2013 | 4 |
| 2014 | 3 |
| 2015 | 7 |
| 2016 | 4 |
| 2017 | 10 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 7 |
| 2021 | 8 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 18 |
| 2025 | 6 |
| 2026 | 22 |
All-Time Record Progression
12 new records| Date | Kind | Detail |
|---|---|---|
| 1963-10-18 | Record daily precipitation | Record daily precipitation 48.8 mm (1.9 in) |
| 1974-01-05 | Record daily snowfall | Record daily snowfall 22.9 cm (9.0 in) |
| 1983-08-13 | Record high minimum temperature | Record high minimum temperature 32.2 C (90.0 F) |
| 1984-08-15 | Record daily precipitation | Record daily precipitation 57.2 mm (2.3 in) |
| 1984-12-24 | Record low maximum temperature | Record low maximum temperature -1.1 C (30.0 F) |
| 1990-12-23 | Record low minimum temperature | Record low minimum temperature -13.3 C (8.1 F) |
| 1992-08-13 | Record high minimum temperature | Record high minimum temperature 32.8 C (91.0 F) |
| 1993-11-11 | Record low minimum temperature | Record low minimum temperature -13.9 C (7.0 F) |
| 1994-07-17 | Record high minimum temperature | Record high minimum temperature 35.0 C (95.0 F) |
| 2001-07-04 | Record high minimum temperature | Record high minimum temperature 36.7 C (98.1 F) |
| 2021-07-11 | Record high maximum temperature | Record high maximum temperature 48.3 C (118.9 F) |
| 2023-08-21 | Record daily precipitation | Record daily precipitation 88.9 mm (3.5 in) |
Wettest Day of Each Month
Aug: 88.9 mm (3.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 38.1 mm (1.5 in) | 22 January 1943 |
| Feb | 42.4 mm (1.7 in) | 23 February 1998 |
| Mar | 38.6 mm (1.5 in) | 6 March 2019 |
| Apr | 31.0 mm (1.2 in) | 5 April 1926 |
| May | 31.0 mm (1.2 in) | 22 May 1921 |
| Jun | 31.2 mm (1.2 in) | 8 June 1972 |
| Jul | 17.3 mm (0.7 in) | 18 July 1965 |
| Aug | 88.9 mm (3.5 in) | 21 August 2023 |
| Sep | 43.2 mm (1.7 in) | 22 September 2025 |
| Oct | 48.8 mm (1.9 in) | 18 October 1963 |
| Nov | 38.1 mm (1.5 in) | 22 November 1984 |
| Dec | 38.9 mm (1.5 in) | 24 December 2016 |
Period of Record Coverage
1920 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1920 | 352 | 96% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 365 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 364 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 364 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 354 | 97% | Yes |
| 1943 | 359 | 98% | Yes |
| 1944 | 346 | 95% | Yes |
| 1945 | 353 | 97% | Yes |
| 1946 | 344 | 94% | Yes |
| 1947 | 349 | 96% | Yes |
| 1948 | 355 | 97% | Yes |
| 1949 | 362 | 99% | Yes |
| 1950 | 363 | 99% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 347 | 95% | Yes |
| 1953 | 338 | 93% | Yes |
| 1954 | 359 | 98% | Yes |
| 1955 | 357 | 98% | Yes |
| 1956 | 363 | 99% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 362 | 99% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 361 | 99% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 343 | 94% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 362 | 99% | Yes |
| 1971 | 363 | 99% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 334 | 92% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 294 | 81% | No |
| 1980 | 349 | 95% | Yes |
| 1981 | 295 | 81% | No |
| 1982 | 363 | 99% | Yes |
| 1983 | 358 | 98% | Yes |
| 1984 | 363 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 363 | 99% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 334 | 91% | Yes |
| 1993 | 111 | 30% | No |
| 1994 | 279 | 76% | No |
| 1995 | 287 | 79% | No |
| 1996 | 362 | 99% | Yes |
| 1997 | 327 | 90% | No |
| 1998 | 357 | 98% | Yes |
| 1999 | 293 | 80% | No |
| 2000 | 271 | 74% | No |
| 2001 | 358 | 98% | Yes |
| 2002 | 314 | 86% | No |
| 2003 | 353 | 97% | Yes |
| 2004 | 284 | 78% | No |
| 2005 | 363 | 99% | Yes |
| 2006 | 360 | 99% | Yes |
| 2007 | 354 | 97% | Yes |
| 2008 | 344 | 94% | Yes |
| 2009 | 340 | 93% | Yes |
| 2010 | 355 | 97% | Yes |
| 2011 | 353 | 97% | Yes |
| 2012 | 356 | 97% | Yes |
| 2013 | 361 | 99% | Yes |
| 2014 | 361 | 99% | Yes |
| 2015 | 362 | 99% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 355 | 97% | Yes |
| 2018 | 362 | 99% | Yes |
| 2019 | 353 | 97% | Yes |
| 2020 | 364 | 99% | Yes |
| 2021 | 358 | 98% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 364 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 357 | 98% | Yes |
| 2026 | 281 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 12 October 2026 | Trona, US | daily rain (Tie, Provisional) | 2.5 mm (0.10 in) | tie | 84 years | 8 of 100 (Routine) |
| 8 October 2026 | Trona, US | daily high min (Tie, Provisional) | 20.6 C (69.1 F) | tie | 1 year | 2 of 100 (Routine) |
| 3 October 2026 | Trona, US | daily high max (Tie, Provisional) | 41.1 C (106.0 F) | tie | 1 year | 2 of 100 (Routine) |
| 10 August 2026 | Trona, US | daily high max (Tie) | 45.6 C (114.1 F) | tie | 85 years | 8 of 100 (Routine) |
| 6 August 2026 | Trona, US | daily high max | 46.1 C (115.0 F) | 0.5 C (0.9 F) | 93 years | 39 of 100 (Notable) |
| 4 August 2026 | Trona, US | daily high max | 46.1 C (115.0 F) | 1.1 C (2.0 F) | 39 years | 24 of 100 (Routine) |
| 3 August 2026 | Trona, US | daily high max (Tie) | 46.1 C (115.0 F) | tie | 80 years | 8 of 100 (Routine) |
| 1 August 2026 | Trona, US | daily high max | 46.1 C (115.0 F) | 0.5 C (0.9 F) | 88 years | 37 of 100 (Notable) |
| 24 June 2026 | Trona, US | daily rain | 0.3 mm (0.01 in) | 0.3 mm (0.01 in) | 105 years | 20 of 100 (Routine) |
| 29 May 2026 | Trona, US | daily rain | 1.3 mm (0.05 in) | 1.3 mm (0.05 in) | 105 years | 20 of 100 (Routine) |
| 13 May 2026 | Trona, US | daily high max | 41.1 C (106.0 F) | 1.7 C (3.1 F) | 99 years | 42 of 100 (Notable) |
| 12 May 2026 | Trona, US | daily high max (Tie) | 40.0 C (104.0 F) | tie | 92 years | 9 of 100 (Routine) |
| 11 May 2026 | Trona, US | daily high max (Tie) | 39.4 C (102.9 F) | tie | 92 years | 9 of 100 (Routine) |
| 10 May 2026 | Trona, US | daily high max (Tie) | 39.4 C (102.9 F) | tie | 92 years | 9 of 100 (Routine) |
| 9 May 2026 | Trona, US | daily high max | 39.4 C (102.9 F) | 1.1 C (2.0 F) | 92 years | 39 of 100 (Notable) |
| 29 March 2026 | Trona, US | daily high max | 32.8 C (91.0 F) | 0.6 C (1.1 F) | 11 years | 14 of 100 (Routine) |
| 28 March 2026 | Trona, US | daily high max | 32.8 C (91.0 F) | 0.6 C (1.1 F) | 55 years | 27 of 100 (Routine) |
| 26 March 2026 | Trona, US | daily high max | 34.4 C (93.9 F) | 2.2 C (4.0 F) | 37 years | 25 of 100 (Routine) |
| 26 March 2026 | Trona, US | daily high min (Tie) | 16.7 C (62.1 F) | tie | 68 years | 7 of 100 (Routine) |
| 25 March 2026 | Trona, US | daily high min | 17.2 C (63.0 F) | 0.5 C (0.9 F) | 97 years | 40 of 100 (Notable) |
Climate Trend
84 complete years, 1921 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1921 | 18.6 C | -0.78 C |
| 1922 | 17.7 C | -1.70 C |
| 1923 | 17.7 C | -1.67 C |
| 1924 | 17.9 C | -1.47 C |
| 1925 | 18.3 C | -1.14 C |
| 1926 | 19.5 C | +0.07 C |
| 1927 | 18.5 C | -0.94 C |
| 1928 | 18.7 C | -0.67 C |
| 1929 | 18.4 C | -1.00 C |
| 1930 | 17.8 C | -1.59 C |
| 1932 | 18.6 C | -0.82 C |
| 1933 | 18.4 C | -1.05 C |
| 1934 | 20.4 C | +0.97 C |
| 1935 | 18.7 C | -0.70 C |
| 1936 | 19.4 C | +0.02 C |
| 1937 | 19.0 C | -0.44 C |
| 1938 | 19.0 C | -0.43 C |
| 1939 | 19.4 C | +0.00 C |
| 1940 | 19.7 C | +0.28 C |
| 1942 | 19.3 C | -0.07 C |
| 1943 | 19.7 C | +0.28 C |
| 1945 | 19.5 C | +0.09 C |
| 1946 | 19.3 C | -0.06 C |
| 1947 | 19.6 C | +0.19 C |
| 1948 | 18.7 C | -0.69 C |
| 1949 | 19.0 C | -0.44 C |
| 1950 | 20.5 C | +1.06 C |
| 1951 | 19.5 C | +0.06 C |
| 1952 | 18.4 C | -0.96 C |
| 1954 | 19.8 C | +0.35 C |
| 1955 | 18.8 C | -0.56 C |
| 1956 | 19.3 C | -0.10 C |
| 1957 | 19.0 C | -0.38 C |
| 1958 | 19.6 C | +0.21 C |
| 1959 | 20.1 C | +0.68 C |
| 1960 | 19.5 C | +0.08 C |
| 1961 | 19.0 C | -0.38 C |
| 1962 | 18.7 C | -0.74 C |
| 1963 | 18.7 C | -0.73 C |
| 1964 | 18.4 C | -1.02 C |
| 1965 | 18.3 C | -1.07 C |
| 1966 | 18.9 C | -0.54 C |
| 1967 | 18.7 C | -0.71 C |
| 1969 | 19.0 C | -0.38 C |
| 1970 | 19.1 C | -0.31 C |
| 1971 | 18.3 C | -1.15 C |
| 1972 | 18.6 C | -0.77 C |
| 1973 | 18.9 C | -0.49 C |
| 1975 | 18.4 C | -1.03 C |
| 1976 | 18.9 C | -0.49 C |
| 1977 | 19.2 C | -0.17 C |
| 1978 | 19.2 C | -0.23 C |
| 1982 | 19.2 C | -0.20 C |
| 1983 | 19.5 C | +0.07 C |
| 1984 | 20.2 C | +0.81 C |
| 1985 | 19.5 C | +0.05 C |
| 1986 | 20.3 C | +0.94 C |
| 1987 | 19.7 C | +0.27 C |
| 1988 | 20.4 C | +0.99 C |
| 1989 | 20.7 C | +1.26 C |
| 1990 | 20.2 C | +0.82 C |
| 1991 | 19.9 C | +0.48 C |
| 1996 | 23.5 C | +4.09 C |
| 1998 | 20.2 C | +0.75 C |
| 2001 | 20.5 C | +1.10 C |
| 2003 | 15.3 C | -4.07 C |
| 2005 | 20.1 C | +0.67 C |
| 2006 | 20.0 C | +0.57 C |
| 2007 | 20.4 C | +1.03 C |
| 2008 | 20.2 C | +0.82 C |
| 2009 | 19.7 C | +0.33 C |
| 2010 | 19.5 C | +0.05 C |
| 2011 | 19.0 C | -0.42 C |
| 2012 | 20.4 C | +0.98 C |
| 2015 | 20.4 C | +0.96 C |
| 2016 | 20.4 C | +0.99 C |
| 2017 | 21.0 C | +1.56 C |
| 2018 | 21.1 C | +1.70 C |
| 2020 | 20.3 C | +0.90 C |
| 2021 | 20.8 C | +1.36 C |
| 2022 | 20.1 C | +0.71 C |
| 2023 | 19.7 C | +0.28 C |
| 2024 | 21.2 C | +1.81 C |
| 2025 | 21.2 C | +1.76 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1921 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 84 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 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1921 to 2025 | 84 | Rise |
| Mean daily maximum | 0.01 C (-0.07 to 0.10) per decade | 0.02 F (-0.13 to 0.17) per decade | 1921 to 2025 | 84 | Not clearly different from zero |
| Mean daily minimum | 0.4 C (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.8) per decade | 1921 to 2025 | 84 | 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
1920 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 48.3 C (118.9 F) | 2021 | 45.6 C (114.1 F) | 106 |
| Coldest night (TNn) | -13.9 C (7.0 F) | 1993 | -6.7 C (19.9 F) | 106 |
| Wettest day (Rx1day) | 88.9 mm (3.5 in) | 2023 | 22.6 mm (0.9 in) | 107 |
| Wettest five days (Rx5day) | 114.3 mm (4.5 in) | 2023 | 31.5 mm (1.2 in) | 107 |
| Longest dry spell (CDD) | 283 days | 1962 | 117 days | 107 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1920 | 44.4 C (111.9 F) |
| 1921 | 44.4 C (111.9 F) |
| 1922 | 46.1 C (115.0 F) |
| 1923 | 45.0 C (113.0 F) |
| 1924 | 45.0 C (113.0 F) |
| 1925 | 46.1 C (115.0 F) |
| 1926 | 46.1 C (115.0 F) |
| 1927 | 44.4 C (111.9 F) |
| 1928 | 45.6 C (114.1 F) |
| 1929 | 45.0 C (113.0 F) |
| 1930 | 44.4 C (111.9 F) |
| 1931 | n/a |
| 1932 | 46.1 C (115.0 F) |
| 1933 | 47.8 C (118.0 F) |
| 1934 | 47.2 C (117.0 F) |
| 1935 | 44.4 C (111.9 F) |
| 1936 | 46.1 C (115.0 F) |
| 1937 | 47.2 C (117.0 F) |
| 1938 | 46.7 C (116.1 F) |
| 1939 | 46.1 C (115.0 F) |
| 1940 | 46.1 C (115.0 F) |
| 1941 | 45.6 C (114.1 F) |
| 1942 | 47.2 C (117.0 F) |
| 1943 | 46.1 C (115.0 F) |
| 1944 | 47.8 C (118.0 F) |
| 1945 | 47.8 C (118.0 F) |
| 1946 | 46.1 C (115.0 F) |
| 1947 | 46.1 C (115.0 F) |
| 1948 | 45.6 C (114.1 F) |
| 1949 | 46.1 C (115.0 F) |
| 1950 | 47.8 C (118.0 F) |
| 1951 | 45.0 C (113.0 F) |
| 1952 | 44.4 C (111.9 F) |
| 1953 | 45.0 C (113.0 F) |
| 1954 | 46.1 C (115.0 F) |
| 1955 | 45.0 C (113.0 F) |
| 1956 | 47.8 C (118.0 F) |
| 1957 | 46.1 C (115.0 F) |
| 1958 | 45.6 C (114.1 F) |
| 1959 | 46.1 C (115.0 F) |
| 1960 | 47.2 C (117.0 F) |
| 1961 | 47.8 C (118.0 F) |
| 1962 | 45.0 C (113.0 F) |
| 1963 | 43.3 C (109.9 F) |
| 1964 | 44.4 C (111.9 F) |
| 1965 | 42.8 C (109.0 F) |
| 1966 | 45.0 C (113.0 F) |
| 1967 | 45.6 C (114.1 F) |
| 1968 | 45.0 C (113.0 F) |
| 1969 | 44.4 C (111.9 F) |
| 1970 | 45.6 C (114.1 F) |
| 1971 | 45.6 C (114.1 F) |
| 1972 | 47.8 C (118.0 F) |
| 1973 | 45.6 C (114.1 F) |
| 1974 | 44.4 C (111.9 F) |
| 1975 | 45.6 C (114.1 F) |
| 1976 | 45.0 C (113.0 F) |
| 1977 | 45.6 C (114.1 F) |
| 1978 | 46.1 C (115.0 F) |
| 1979 | 45.6 C (114.1 F) |
| 1980 | 45.0 C (113.0 F) |
| 1981 | 47.8 C (118.0 F) |
| 1982 | 46.1 C (115.0 F) |
| 1983 | 44.4 C (111.9 F) |
| 1984 | 46.1 C (115.0 F) |
| 1985 | 46.7 C (116.1 F) |
| 1986 | 45.0 C (113.0 F) |
| 1987 | 45.0 C (113.0 F) |
| 1988 | 46.1 C (115.0 F) |
| 1989 | 47.2 C (117.0 F) |
| 1990 | 45.0 C (113.0 F) |
| 1991 | 45.6 C (114.1 F) |
| 1992 | 45.0 C (113.0 F) |
| 1993 | 31.1 C (88.0 F) |
| 1994 | 47.8 C (118.0 F) |
| 1995 | 45.0 C (113.0 F) |
| 1996 | 45.6 C (114.1 F) |
| 1997 | 44.4 C (111.9 F) |
| 1998 | 43.9 C (111.0 F) |
| 1999 | 41.7 C (107.1 F) |
| 2000 | 40.6 C (105.1 F) |
| 2001 | 40.6 C (105.1 F) |
| 2002 | 37.2 C (99.0 F) |
| 2003 | 40.6 C (105.1 F) |
| 2004 | 47.2 C (117.0 F) |
| 2005 | 47.2 C (117.0 F) |
| 2006 | 46.1 C (115.0 F) |
| 2007 | 47.8 C (118.0 F) |
| 2008 | 46.1 C (115.0 F) |
| 2009 | 46.7 C (116.1 F) |
| 2010 | 44.4 C (111.9 F) |
| 2011 | 44.4 C (111.9 F) |
| 2012 | 45.6 C (114.1 F) |
| 2013 | 46.1 C (115.0 F) |
| 2014 | 45.0 C (113.0 F) |
| 2015 | 44.4 C (111.9 F) |
| 2016 | 47.8 C (118.0 F) |
| 2017 | 46.7 C (116.1 F) |
| 2018 | 46.1 C (115.0 F) |
| 2019 | 44.4 C (111.9 F) |
| 2020 | 46.7 C (116.1 F) |
| 2021 | 48.3 C (118.9 F) |
| 2022 | 46.7 C (116.1 F) |
| 2023 | 48.3 C (118.9 F) |
| 2024 | 48.3 C (118.9 F) |
| 2025 | 45.0 C (113.0 F) |
| 2026 | 46.1 C (115.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1920 | -6.7 C (19.9 F) |
| 1921 | -8.9 C (16.0 F) |
| 1922 | -10.0 C (14.0 F) |
| 1923 | -6.7 C (19.9 F) |
| 1924 | -12.2 C (10.0 F) |
| 1925 | -8.3 C (17.1 F) |
| 1926 | -8.3 C (17.1 F) |
| 1927 | -7.2 C (19.0 F) |
| 1928 | -9.4 C (15.1 F) |
| 1929 | -8.3 C (17.1 F) |
| 1930 | -11.1 C (12.0 F) |
| 1931 | n/a |
| 1932 | -6.7 C (19.9 F) |
| 1933 | -6.7 C (19.9 F) |
| 1934 | -5.0 C (23.0 F) |
| 1935 | -7.2 C (19.0 F) |
| 1936 | -5.6 C (21.9 F) |
| 1937 | -10.6 C (12.9 F) |
| 1938 | -6.1 C (21.0 F) |
| 1939 | -5.0 C (23.0 F) |
| 1940 | -10.0 C (14.0 F) |
| 1941 | -6.7 C (19.9 F) |
| 1942 | -6.7 C (19.9 F) |
| 1943 | -10.0 C (14.0 F) |
| 1944 | -4.4 C (24.1 F) |
| 1945 | -7.2 C (19.0 F) |
| 1946 | -6.7 C (19.9 F) |
| 1947 | -5.0 C (23.0 F) |
| 1948 | -10.6 C (12.9 F) |
| 1949 | -12.2 C (10.0 F) |
| 1950 | -10.6 C (12.9 F) |
| 1951 | -9.4 C (15.1 F) |
| 1952 | -8.3 C (17.1 F) |
| 1953 | -8.3 C (17.1 F) |
| 1954 | -7.8 C (18.0 F) |
| 1955 | -3.9 C (25.0 F) |
| 1956 | -7.8 C (18.0 F) |
| 1957 | -5.6 C (21.9 F) |
| 1958 | -5.0 C (23.0 F) |
| 1959 | -5.6 C (21.9 F) |
| 1960 | -7.2 C (19.0 F) |
| 1961 | -8.3 C (17.1 F) |
| 1962 | -12.2 C (10.0 F) |
| 1963 | -11.7 C (10.9 F) |
| 1964 | -6.7 C (19.9 F) |
| 1965 | -7.8 C (18.0 F) |
| 1966 | -8.9 C (16.0 F) |
| 1967 | -6.1 C (21.0 F) |
| 1968 | -10.6 C (12.9 F) |
| 1969 | -5.6 C (21.9 F) |
| 1970 | -10.0 C (14.0 F) |
| 1971 | -8.3 C (17.1 F) |
| 1972 | -11.7 C (10.9 F) |
| 1973 | -10.6 C (12.9 F) |
| 1974 | -11.1 C (12.0 F) |
| 1975 | -6.7 C (19.9 F) |
| 1976 | -8.9 C (16.0 F) |
| 1977 | -5.0 C (23.0 F) |
| 1978 | -6.7 C (19.9 F) |
| 1979 | -6.1 C (21.0 F) |
| 1980 | -4.4 C (24.1 F) |
| 1981 | -3.9 C (25.0 F) |
| 1982 | -5.0 C (23.0 F) |
| 1983 | -4.4 C (24.1 F) |
| 1984 | -3.3 C (26.1 F) |
| 1985 | -5.0 C (23.0 F) |
| 1986 | -2.2 C (28.0 F) |
| 1987 | -6.1 C (21.0 F) |
| 1988 | -9.4 C (15.1 F) |
| 1989 | -6.7 C (19.9 F) |
| 1990 | -13.3 C (8.1 F) |
| 1991 | -7.8 C (18.0 F) |
| 1992 | -5.0 C (23.0 F) |
| 1993 | -13.9 C (7.0 F) |
| 1994 | -13.9 C (7.0 F) |
| 1995 | -0.6 C (30.9 F) |
| 1996 | 1.7 C (35.1 F) |
| 1997 | 5.6 C (42.1 F) |
| 1998 | 1.1 C (34.0 F) |
| 1999 | 2.8 C (37.0 F) |
| 2000 | 1.7 C (35.1 F) |
| 2001 | 1.7 C (35.1 F) |
| 2002 | 1.7 C (35.1 F) |
| 2003 | -10.0 C (14.0 F) |
| 2004 | -11.1 C (12.0 F) |
| 2005 | -3.3 C (26.1 F) |
| 2006 | -5.6 C (21.9 F) |
| 2007 | -9.4 C (15.1 F) |
| 2008 | -3.9 C (25.0 F) |
| 2009 | -3.9 C (25.0 F) |
| 2010 | -4.4 C (24.1 F) |
| 2011 | -5.0 C (23.0 F) |
| 2012 | -5.0 C (23.0 F) |
| 2013 | -7.2 C (19.0 F) |
| 2014 | -5.0 C (23.0 F) |
| 2015 | -8.3 C (17.1 F) |
| 2016 | -5.0 C (23.0 F) |
| 2017 | -9.4 C (15.1 F) |
| 2018 | -2.8 C (27.0 F) |
| 2019 | -4.4 C (24.1 F) |
| 2020 | -2.8 C (27.0 F) |
| 2021 | -3.3 C (26.1 F) |
| 2022 | -3.9 C (25.0 F) |
| 2023 | -1.7 C (28.9 F) |
| 2024 | -3.3 C (26.1 F) |
| 2025 | -5.6 C (21.9 F) |
| 2026 | -1.1 C (30.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1920 | 22.4 mm (0.9 in) |
| 1921 | 35.8 mm (1.4 in) |
| 1922 | 21.8 mm (0.9 in) |
| 1923 | 27.4 mm (1.1 in) |
| 1924 | 4.8 mm (0.19 in) |
| 1925 | 13.7 mm (0.5 in) |
| 1926 | 31.0 mm (1.2 in) |
| 1927 | 23.9 mm (0.9 in) |
| 1928 | 27.4 mm (1.1 in) |
| 1929 | 11.4 mm (0.4 in) |
| 1930 | 20.3 mm (0.8 in) |
| 1931 | 24.1 mm (0.9 in) |
| 1932 | 12.4 mm (0.5 in) |
| 1933 | 30.0 mm (1.2 in) |
| 1934 | 27.4 mm (1.1 in) |
| 1935 | 20.8 mm (0.8 in) |
| 1936 | 27.9 mm (1.1 in) |
| 1937 | 35.6 mm (1.4 in) |
| 1938 | 32.3 mm (1.3 in) |
| 1939 | 36.1 mm (1.4 in) |
| 1940 | 25.7 mm (1.0 in) |
| 1941 | 26.2 mm (1.0 in) |
| 1942 | 10.9 mm (0.4 in) |
| 1943 | 38.1 mm (1.5 in) |
| 1944 | 21.8 mm (0.9 in) |
| 1945 | 26.7 mm (1.1 in) |
| 1946 | 24.4 mm (1.0 in) |
| 1947 | 9.1 mm (0.36 in) |
| 1948 | 7.1 mm (0.28 in) |
| 1949 | 10.7 mm (0.4 in) |
| 1950 | 20.6 mm (0.8 in) |
| 1951 | 10.7 mm (0.4 in) |
| 1952 | 34.3 mm (1.4 in) |
| 1953 | 5.3 mm (0.21 in) |
| 1954 | 30.5 mm (1.2 in) |
| 1955 | 7.9 mm (0.31 in) |
| 1956 | 33.8 mm (1.3 in) |
| 1957 | 19.1 mm (0.8 in) |
| 1958 | 19.1 mm (0.8 in) |
| 1959 | 12.7 mm (0.5 in) |
| 1960 | 14.7 mm (0.6 in) |
| 1961 | 11.4 mm (0.4 in) |
| 1962 | 28.2 mm (1.1 in) |
| 1963 | 48.8 mm (1.9 in) |
| 1964 | 11.9 mm (0.5 in) |
| 1965 | 27.2 mm (1.1 in) |
| 1966 | 10.7 mm (0.4 in) |
| 1967 | 18.3 mm (0.7 in) |
| 1968 | 29.2 mm (1.1 in) |
| 1969 | 23.1 mm (0.9 in) |
| 1970 | 12.7 mm (0.5 in) |
| 1971 | 10.9 mm (0.4 in) |
| 1972 | 31.2 mm (1.2 in) |
| 1973 | 26.9 mm (1.1 in) |
| 1974 | 26.9 mm (1.1 in) |
| 1975 | 11.4 mm (0.4 in) |
| 1976 | 35.6 mm (1.4 in) |
| 1977 | 22.6 mm (0.9 in) |
| 1978 | 27.4 mm (1.1 in) |
| 1979 | 30.5 mm (1.2 in) |
| 1980 | 29.2 mm (1.1 in) |
| 1981 | 19.6 mm (0.8 in) |
| 1982 | 18.5 mm (0.7 in) |
| 1983 | 30.0 mm (1.2 in) |
| 1984 | 57.2 mm (2.3 in) |
| 1985 | 8.4 mm (0.33 in) |
| 1986 | 23.1 mm (0.9 in) |
| 1987 | 13.7 mm (0.5 in) |
| 1988 | 21.8 mm (0.9 in) |
| 1989 | 4.3 mm (0.17 in) |
| 1990 | 7.6 mm (0.30 in) |
| 1991 | 27.2 mm (1.1 in) |
| 1992 | 37.6 mm (1.5 in) |
| 1993 | 25.9 mm (1.0 in) |
| 1994 | 4.6 mm (0.18 in) |
| 1995 | 28.2 mm (1.1 in) |
| 1996 | 6.6 mm (0.26 in) |
| 1997 | 39.1 mm (1.5 in) |
| 1998 | 42.4 mm (1.7 in) |
| 1999 | 5.6 mm (0.22 in) |
| 2000 | 13.5 mm (0.5 in) |
| 2001 | 19.8 mm (0.8 in) |
| 2002 | 9.9 mm (0.39 in) |
| 2003 | 26.4 mm (1.0 in) |
| 2004 | 28.7 mm (1.1 in) |
| 2005 | 24.6 mm (1.0 in) |
| 2006 | 20.3 mm (0.8 in) |
| 2007 | 12.7 mm (0.5 in) |
| 2008 | 23.6 mm (0.9 in) |
| 2009 | 14.7 mm (0.6 in) |
| 2010 | 25.4 mm (1.0 in) |
| 2011 | 7.6 mm (0.30 in) |
| 2012 | 6.4 mm (0.25 in) |
| 2013 | 7.4 mm (0.29 in) |
| 2014 | 25.4 mm (1.0 in) |
| 2015 | 17.0 mm (0.7 in) |
| 2016 | 38.9 mm (1.5 in) |
| 2017 | 23.6 mm (0.9 in) |
| 2018 | 12.7 mm (0.5 in) |
| 2019 | 38.6 mm (1.5 in) |
| 2020 | 22.6 mm (0.9 in) |
| 2021 | 14.2 mm (0.6 in) |
| 2022 | 21.6 mm (0.9 in) |
| 2023 | 88.9 mm (3.5 in) |
| 2024 | 22.9 mm (0.9 in) |
| 2025 | 43.2 mm (1.7 in) |
| 2026 | 11.7 mm (0.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1920 | 25.7 mm (1.0 in) |
| 1921 | 55.8 mm (2.2 in) |
| 1922 | 22.6 mm (0.9 in) |
| 1923 | 28.9 mm (1.1 in) |
| 1924 | 7.8 mm (0.31 in) |
| 1925 | 16.2 mm (0.6 in) |
| 1926 | 39.4 mm (1.6 in) |
| 1927 | 52.9 mm (2.1 in) |
| 1928 | 30.2 mm (1.2 in) |
| 1929 | 14.3 mm (0.6 in) |
| 1930 | 25.4 mm (1.0 in) |
| 1931 | 38.1 mm (1.5 in) |
| 1932 | 21.3 mm (0.8 in) |
| 1933 | 45.2 mm (1.8 in) |
| 1934 | 32.3 mm (1.3 in) |
| 1935 | 35.8 mm (1.4 in) |
| 1936 | 30.5 mm (1.2 in) |
| 1937 | 37.4 mm (1.5 in) |
| 1938 | 67.2 mm (2.6 in) |
| 1939 | 56.7 mm (2.2 in) |
| 1940 | 56.7 mm (2.2 in) |
| 1941 | 45.1 mm (1.8 in) |
| 1942 | 12.7 mm (0.5 in) |
| 1943 | 70.8 mm (2.8 in) |
| 1944 | 45.1 mm (1.8 in) |
| 1945 | 37.8 mm (1.5 in) |
| 1946 | 53.1 mm (2.1 in) |
| 1947 | 10.2 mm (0.4 in) |
| 1948 | 10.2 mm (0.4 in) |
| 1949 | 20.4 mm (0.8 in) |
| 1950 | 21.1 mm (0.8 in) |
| 1951 | 12.2 mm (0.5 in) |
| 1952 | 58.2 mm (2.3 in) |
| 1953 | 5.3 mm (0.21 in) |
| 1954 | 47.0 mm (1.9 in) |
| 1955 | 8.4 mm (0.33 in) |
| 1956 | 47.0 mm (1.9 in) |
| 1957 | 19.1 mm (0.8 in) |
| 1958 | 31.5 mm (1.2 in) |
| 1959 | 19.9 mm (0.8 in) |
| 1960 | 14.7 mm (0.6 in) |
| 1961 | 11.4 mm (0.4 in) |
| 1962 | 46.0 mm (1.8 in) |
| 1963 | 48.8 mm (1.9 in) |
| 1964 | 11.9 mm (0.5 in) |
| 1965 | 38.0 mm (1.5 in) |
| 1966 | 22.8 mm (0.9 in) |
| 1967 | 38.6 mm (1.5 in) |
| 1968 | 34.3 mm (1.4 in) |
| 1969 | 44.2 mm (1.7 in) |
| 1970 | 22.1 mm (0.9 in) |
| 1971 | 25.9 mm (1.0 in) |
| 1972 | 31.5 mm (1.2 in) |
| 1973 | 35.8 mm (1.4 in) |
| 1974 | 46.7 mm (1.8 in) |
| 1975 | 19.5 mm (0.8 in) |
| 1976 | 45.8 mm (1.8 in) |
| 1977 | 34.0 mm (1.3 in) |
| 1978 | 59.2 mm (2.3 in) |
| 1979 | 34.8 mm (1.4 in) |
| 1980 | 48.7 mm (1.9 in) |
| 1981 | 34.5 mm (1.4 in) |
| 1982 | 25.7 mm (1.0 in) |
| 1983 | 62.2 mm (2.4 in) |
| 1984 | 63.6 mm (2.5 in) |
| 1985 | 8.4 mm (0.33 in) |
| 1986 | 23.1 mm (0.9 in) |
| 1987 | 19.3 mm (0.8 in) |
| 1988 | 21.8 mm (0.9 in) |
| 1989 | 4.3 mm (0.17 in) |
| 1990 | 16.5 mm (0.6 in) |
| 1991 | 34.8 mm (1.4 in) |
| 1992 | 42.5 mm (1.7 in) |
| 1993 | 35.5 mm (1.4 in) |
| 1994 | 4.6 mm (0.18 in) |
| 1995 | 8.9 mm (0.35 in) |
| 1996 | 10.2 mm (0.4 in) |
| 1997 | 39.1 mm (1.5 in) |
| 1998 | 45.7 mm (1.8 in) |
| 1999 | 8.1 mm (0.32 in) |
| 2000 | 17.1 mm (0.7 in) |
| 2001 | 29.7 mm (1.2 in) |
| 2002 | 17.8 mm (0.7 in) |
| 2003 | 34.0 mm (1.3 in) |
| 2004 | 52.9 mm (2.1 in) |
| 2005 | 62.5 mm (2.5 in) |
| 2006 | 21.4 mm (0.8 in) |
| 2007 | 16.5 mm (0.6 in) |
| 2008 | 29.9 mm (1.2 in) |
| 2009 | 28.7 mm (1.1 in) |
| 2010 | 57.9 mm (2.3 in) |
| 2011 | 14.5 mm (0.6 in) |
| 2012 | 6.9 mm (0.27 in) |
| 2013 | 8.6 mm (0.34 in) |
| 2014 | 25.4 mm (1.0 in) |
| 2015 | 17.3 mm (0.7 in) |
| 2016 | 38.9 mm (1.5 in) |
| 2017 | 44.6 mm (1.8 in) |
| 2018 | 17.8 mm (0.7 in) |
| 2019 | 46.7 mm (1.8 in) |
| 2020 | 49.5 mm (1.9 in) |
| 2021 | 16.0 mm (0.6 in) |
| 2022 | 37.9 mm (1.5 in) |
| 2023 | 114.3 mm (4.5 in) |
| 2024 | 59.0 mm (2.3 in) |
| 2025 | 53.1 mm (2.1 in) |
| 2026 | 42.0 mm (1.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1920 | 96 days |
| 1921 | 30 days |
| 1922 | 39 days |
| 1923 | 51 days |
| 1924 | 35 days |
| 1925 | 85 days |
| 1926 | 59 days |
| 1927 | 103 days |
| 1928 | 176 days |
| 1929 | 131 days |
| 1930 | 244 days |
| 1931 | 70 days |
| 1932 | 117 days |
| 1933 | 197 days |
| 1934 | 95 days |
| 1935 | 126 days |
| 1936 | 127 days |
| 1937 | 197 days |
| 1938 | 67 days |
| 1939 | 83 days |
| 1940 | 117 days |
| 1941 | 113 days |
| 1942 | 121 days |
| 1943 | 107 days |
| 1944 | 168 days |
| 1945 | 108 days |
| 1946 | 115 days |
| 1947 | 150 days |
| 1948 | 170 days |
| 1949 | 78 days |
| 1950 | 128 days |
| 1951 | 163 days |
| 1952 | 145 days |
| 1953 | 200 days |
| 1954 | 232 days |
| 1955 | 172 days |
| 1956 | 174 days |
| 1957 | 100 days |
| 1958 | 115 days |
| 1959 | 202 days |
| 1960 | 136 days |
| 1961 | 125 days |
| 1962 | 283 days |
| 1963 | 56 days |
| 1964 | 140 days |
| 1965 | 105 days |
| 1966 | 176 days |
| 1967 | 130 days |
| 1968 | 95 days |
| 1969 | 100 days |
| 1970 | 125 days |
| 1971 | 122 days |
| 1972 | 117 days |
| 1973 | 186 days |
| 1974 | 78 days |
| 1975 | 185 days |
| 1976 | 94 days |
| 1977 | 84 days |
| 1978 | 88 days |
| 1979 | 92 days |
| 1980 | 113 days |
| 1981 | 102 days |
| 1982 | 47 days |
| 1983 | 111 days |
| 1984 | 116 days |
| 1985 | 253 days |
| 1986 | 85 days |
| 1987 | 109 days |
| 1988 | 130 days |
| 1989 | 144 days |
| 1990 | 128 days |
| 1991 | 128 days |
| 1992 | 90 days |
| 1993 | 117 days |
| 1994 | 121 days |
| 1995 | 278 days |
| 1996 | 156 days |
| 1997 | 95 days |
| 1998 | 91 days |
| 1999 | 127 days |
| 2000 | 124 days |
| 2001 | 134 days |
| 2002 | 235 days |
| 2003 | 92 days |
| 2004 | 92 days |
| 2005 | 101 days |
| 2006 | 87 days |
| 2007 | 228 days |
| 2008 | 116 days |
| 2009 | 147 days |
| 2010 | 131 days |
| 2011 | 61 days |
| 2012 | 57 days |
| 2013 | 127 days |
| 2014 | 118 days |
| 2015 | 107 days |
| 2016 | 106 days |
| 2017 | 110 days |
| 2018 | 157 days |
| 2019 | 122 days |
| 2020 | 136 days |
| 2021 | 66 days |
| 2022 | 126 days |
| 2023 | 86 days |
| 2024 | 239 days |
| 2025 | 77 days |
| 2026 | 98 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
80 years with a frostAcross 80 years with a frost, the median last spring frost at Trona falls on 7 March and the median first autumn frost on 19 November, which leaves a median of 254 days between them.
In 1977 to 2024 the median growing season was 268 days. That is 17 days more than in 1921 to 1954.
Fitted over all years, the growing season changes by +4.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1921 to 1954) | Recent period (1977 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 7 March | 14 March | 1 March | 13 days earlier | -3.3 days per decade |
| First autumn frost | 19 November | 10 November | 23 November | 13 days later | +1.3 days per decade |
| Growing days | 254 days | 251 days | 268 days | 17 days more | +4.6 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
95 years, 1926 to 2025A day with at least 21.3 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 58.2 mm (2.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 21.3 mm (0.8 in) | |
| 5 years | 32.2 mm (1.3 in) | |
| 10 years | 38.9 mm (1.5 in) | |
| 25 years | 47.1 mm (1.9 in) | |
| 50 years | 52.8 mm (2.1 in) | |
| 100 years | 58.2 mm (2.3 in) | Longer than the 95 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, 95 years of values from 1926 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: 88.9 mm (3.5 in) in 2023; 57.2 mm (2.3 in) in 1984; 48.8 mm (1.9 in) in 1963.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Trona, at 1958, 1978 and 1989. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1958 ran 0.6 C (1.1 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1978 ran 0.4 C (0.6 F) higher than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1989 ran 0.7 C (1.3 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1958 | -0.6 | -1.1 | likely | 5 |
| 1978 | +0.4 | +0.6 | possible | 5 |
| 1989 | +0.7 | +1.3 | possible | 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
2008 to 2025 against 1961 to 1990Over 2008 to 2025, Trona had a mean temperature of 20.3 C (68.6 F) and 101.5 mm (4.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Valley of Fire Sp (United States, 269 km away), Maricopa 4 N (United States, 573 km away) and Sacaton (United States, 596 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Valley of Fire Sp | United States | 269 km (167 mi) | 20.4 C (68.7 F) | 185.9 mm (7.3 in) | 0.64 |
| Maricopa 4 N | United States | 573 km (356 mi) | 20.7 C (69.2 F) | 196.3 mm (7.7 in) | 0.77 |
| Sacaton | United States | 596 km (370 mi) | 20.6 C (69.1 F) | 192.8 mm (7.6 in) | 0.82 |
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).