Iron Mtn Weather Records (USC00044297)
Record envelope, standing records and threshold days for Iron Mtn (USC00044297), California, United States, with 92 years of record.
Key Facts for Iron Mtn
- Iron Mtn (USC00044297) is a weather station in California, United States at 34.15 latitude and -115.12 longitude, 281 m (922 ft) above sea level.
- The station reports from 1935 to 2026, 92 years of record.
- 1,464 records set at Iron Mtn still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Iron Mtn set a daily record high minimum temperature of 26.1 C (79.0 F) on 5 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, 34.15 latitude, -115.12 longitude.
- Elevation: 281 m (922 ft).
- Period of record: 1935 to 2026, 92 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
18 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 29.4 C (84.9 F) | -6.1 C (21.0 F) | 26.1 C (79.0 F) | 5.0 C (41.0 F) |
| Feb | 33.9 C (93.0 F) | -4.4 C (24.1 F) | 33.9 C (93.0 F) | 3.9 C (39.0 F) |
| Mar | 42.2 C (108.0 F) | -1.1 C (30.0 F) | 42.2 C (108.0 F) | 12.2 C (54.0 F) |
| Apr | 41.7 C (107.1 F) | 0.6 C (33.1 F) | 33.9 C (93.0 F) | 17.2 C (63.0 F) |
| May | 45.6 C (114.1 F) | 2.8 C (37.0 F) | n/a | n/a |
| Jun | 52.8 C (127.0 F) | 10.6 C (51.1 F) | 43.9 C (111.0 F) | 21.7 C (71.1 F) |
| Jul | 50.0 C (122.0 F) | 15.6 C (60.1 F) | n/a | n/a |
| Aug | 49.4 C (120.9 F) | 15.6 C (60.1 F) | 45.6 C (114.1 F) | 27.2 C (81.0 F) |
| Sep | 48.9 C (120.0 F) | 10.0 C (50.0 F) | 43.9 C (111.0 F) | 17.8 C (64.0 F) |
| Oct | 44.4 C (111.9 F) | 0.6 C (33.1 F) | 38.9 C (102.0 F) | 16.7 C (62.1 F) |
| Nov | 34.4 C (93.9 F) | -2.2 C (28.0 F) | n/a | n/a |
| Dec | 29.4 C (84.9 F) | -5.6 C (21.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1935 | 14 |
| 1936 | 28 |
| 1937 | 26 |
| 1938 | 13 |
| 1939 | 13 |
| 1940 | 15 |
| 1941 | 13 |
| 1942 | 5 |
| 1943 | 14 |
| 1944 | 12 |
| 1945 | 15 |
| 1946 | 14 |
| 1947 | 16 |
| 1948 | 14 |
| 1949 | 47 |
| 1950 | 38 |
| 1951 | 15 |
| 1952 | 10 |
| 1953 | 14 |
| 1954 | 12 |
| 1955 | 18 |
| 1956 | 15 |
| 1957 | 19 |
| 1958 | 19 |
| 1959 | 15 |
| 1960 | 12 |
| 1961 | 9 |
| 1962 | 25 |
| 1963 | 20 |
| 1964 | 21 |
| 1965 | 20 |
| 1966 | 11 |
| 1967 | 22 |
| 1968 | 13 |
| 1969 | 9 |
| 1970 | 12 |
| 1971 | 36 |
| 1972 | 22 |
| 1973 | 7 |
| 1974 | 7 |
| 1975 | 19 |
| 1976 | 15 |
| 1977 | 11 |
| 1978 | 9 |
| 1979 | 11 |
| 1980 | 16 |
| 1981 | 13 |
| 1982 | 18 |
| 1983 | 9 |
| 1984 | 9 |
| 1985 | 23 |
| 1986 | 30 |
| 1987 | 9 |
| 1988 | 9 |
| 1989 | 25 |
| 1990 | 18 |
| 1991 | 33 |
| 1992 | 14 |
| 1993 | 23 |
| 1994 | 15 |
| 1995 | 23 |
| 1996 | 22 |
| 1997 | 15 |
| 1998 | 10 |
| 1999 | 12 |
| 2000 | 18 |
| 2001 | 11 |
| 2002 | 11 |
| 2003 | 13 |
| 2004 | 7 |
| 2005 | 9 |
| 2006 | 11 |
| 2007 | 21 |
| 2008 | 12 |
| 2009 | 13 |
| 2010 | 9 |
| 2011 | 9 |
| 2012 | 8 |
| 2013 | 12 |
| 2014 | 12 |
| 2015 | 10 |
| 2016 | 11 |
| 2017 | 17 |
| 2018 | 7 |
| 2019 | 4 |
| 2020 | 34 |
| 2021 | 19 |
| 2022 | 11 |
| 2023 | 10 |
| 2024 | 25 |
| 2025 | 14 |
| 2026 | 35 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1967-08-01 | Record high maximum temperature | Record high maximum temperature 49.4 C (120.9 F) |
| 1998-07-17 | Record high maximum temperature | Record high maximum temperature 50.0 C (122.0 F) |
| 2008-06-22 | Record high maximum temperature | Record high maximum temperature 51.1 C (124.0 F) |
| 2008-06-23 | Record high maximum temperature | Record high maximum temperature 52.8 C (127.0 F) |
Wettest Day of Each Month
Sep: 75.7 mm (3.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 33.8 mm (1.3 in) | 22 January 2010 |
| Feb | 38.1 mm (1.5 in) | 2 February 2024 |
| Mar | 27.9 mm (1.1 in) | 2 March 1983 |
| Apr | 23.6 mm (0.9 in) | 4 April 1965 |
| May | 11.2 mm (0.4 in) | 4 May 1982 |
| Jun | 27.4 mm (1.1 in) | 7 June 1972 |
| Jul | 37.1 mm (1.5 in) | 26 July 2007 |
| Aug | 51.3 mm (2.0 in) | 4 August 2014 |
| Sep | 75.7 mm (3.0 in) | 6 September 1939 |
| Oct | 52.8 mm (2.1 in) | 4 October 1968 |
| Nov | 45.0 mm (1.8 in) | 19 November 2019 |
| Dec | 37.1 mm (1.5 in) | 18 December 1962 |
Period of Record Coverage
1935 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1935 | 354 | 97% | Yes |
| 1936 | 363 | 99% | Yes |
| 1937 | 358 | 98% | Yes |
| 1938 | 357 | 98% | Yes |
| 1939 | 364 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 360 | 99% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 358 | 98% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 364 | 100% | Yes |
| 1948 | 354 | 97% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 363 | 99% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 334 | 92% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 363 | 99% | Yes |
| 1982 | 316 | 87% | No |
| 1983 | 364 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 362 | 99% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 331 | 91% | Yes |
| 1990 | 362 | 99% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 359 | 98% | Yes |
| 1993 | 351 | 96% | Yes |
| 1994 | 358 | 98% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 327 | 90% | No |
| 2000 | 346 | 95% | Yes |
| 2001 | 354 | 97% | Yes |
| 2002 | 355 | 97% | Yes |
| 2003 | 321 | 88% | No |
| 2004 | 365 | 100% | Yes |
| 2005 | 347 | 95% | Yes |
| 2006 | 361 | 99% | Yes |
| 2007 | 360 | 99% | Yes |
| 2008 | 348 | 95% | Yes |
| 2009 | 331 | 91% | Yes |
| 2010 | 348 | 95% | Yes |
| 2011 | 329 | 90% | Yes |
| 2012 | 334 | 91% | Yes |
| 2013 | 334 | 92% | Yes |
| 2014 | 326 | 89% | No |
| 2015 | 355 | 97% | Yes |
| 2016 | 288 | 79% | No |
| 2017 | 161 | 44% | No |
| 2018 | 323 | 88% | No |
| 2019 | 350 | 96% | Yes |
| 2020 | 348 | 95% | Yes |
| 2021 | 355 | 97% | Yes |
| 2022 | 348 | 95% | Yes |
| 2023 | 337 | 92% | Yes |
| 2024 | 364 | 99% | Yes |
| 2025 | 351 | 96% | Yes |
| 2026 | 152 | 42% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 October 2026 | Iron Mtn, US | daily high min (Provisional) | 26.1 C (79.0 F) | 0.5 C (0.9 F) | 1 year | 10 of 100 (Routine) |
| 4 October 2026 | Iron Mtn, US | daily high min (Provisional) | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 12 years | 13 of 100 (Routine) |
| 14 September 2026 | Iron Mtn, US | daily high min (Provisional) | 29.4 C (84.9 F) | 0.5 C (0.9 F) | 55 years | 26 of 100 (Routine) |
| 12 September 2026 | Iron Mtn, US | daily high min (Provisional) | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 88 years | 38 of 100 (Notable) |
| 11 September 2026 | Iron Mtn, US | daily high min (Provisional) | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 88 years | 38 of 100 (Notable) |
| 28 August 2026 | Iron Mtn, US | daily high min (Tie, Provisional) | 33.3 C (91.9 F) | tie | 8 years | 2 of 100 (Routine) |
| 27 August 2026 | Iron Mtn, US | daily high min (Tie, Provisional) | 33.9 C (93.0 F) | tie | 5 years | 2 of 100 (Routine) |
| 20 August 2026 | Iron Mtn, US | daily high min (Provisional) | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 16 years | 14 of 100 (Routine) |
| 19 August 2026 | Iron Mtn, US | daily high min (Tie, Provisional) | 31.7 C (89.1 F) | tie | 33 years | 4 of 100 (Routine) |
| 16 June 2026 | Iron Mtn, US | daily high min | 31.7 C (89.1 F) | 0.6 C (1.1 F) | 64 years | 29 of 100 (Routine) |
| 31 March 2026 | Iron Mtn, US | daily high max | 36.7 C (98.1 F) | 0.6 C (1.1 F) | 15 years | 14 of 100 (Routine) |
| 31 March 2026 | Iron Mtn, US | monthly high min (Tie) | 23.3 C (73.9 F) | tie | 0 years | 4 of 100 (Routine) |
| 30 March 2026 | Iron Mtn, US | daily high min | 21.7 C (71.1 F) | 2.3 C (4.1 F) | 76 years | 37 of 100 (Notable) |
| 30 March 2026 | Iron Mtn, US | daily high max | 38.3 C (100.9 F) | 1.6 C (2.9 F) | 11 years | 15 of 100 (Routine) |
| 29 March 2026 | Iron Mtn, US | daily high min | 21.7 C (71.1 F) | 1.7 C (3.1 F) | 36 years | 24 of 100 (Routine) |
| 29 March 2026 | Iron Mtn, US | daily high max | 38.9 C (102.0 F) | 3.3 C (5.9 F) | 11 years | 18 of 100 (Routine) |
| 28 March 2026 | Iron Mtn, US | daily high max | 37.8 C (100.0 F) | 1.7 C (3.1 F) | 0 years | 12 of 100 (Routine) |
| 28 March 2026 | Iron Mtn, US | daily high min | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 4 years | 11 of 100 (Routine) |
| 27 March 2026 | Iron Mtn, US | daily high max | 38.3 C (100.9 F) | 2.2 C (4.0 F) | 40 years | 25 of 100 (Routine) |
| 27 March 2026 | Iron Mtn, US | daily high min | 21.1 C (70.0 F) | 2.2 C (4.0 F) | 24 years | 22 of 100 (Routine) |
Climate Trend
82 complete years, 1935 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1935 | 22.7 C | -0.55 C |
| 1936 | 24.0 C | +0.73 C |
| 1937 | 23.3 C | +0.01 C |
| 1938 | 23.0 C | -0.27 C |
| 1939 | 22.9 C | -0.36 C |
| 1940 | 23.7 C | +0.36 C |
| 1941 | 21.9 C | -1.38 C |
| 1942 | 23.0 C | -0.30 C |
| 1943 | 23.3 C | +0.02 C |
| 1944 | 21.9 C | -1.35 C |
| 1945 | 22.6 C | -0.70 C |
| 1946 | 22.9 C | -0.41 C |
| 1947 | 23.1 C | -0.21 C |
| 1948 | 22.0 C | -1.33 C |
| 1949 | 22.1 C | -1.16 C |
| 1950 | 23.6 C | +0.28 C |
| 1951 | 22.4 C | -0.85 C |
| 1952 | 22.6 C | -0.66 C |
| 1953 | 23.1 C | -0.20 C |
| 1954 | 23.7 C | +0.44 C |
| 1955 | 22.3 C | -1.02 C |
| 1956 | 23.0 C | -0.28 C |
| 1957 | 22.9 C | -0.41 C |
| 1958 | 23.8 C | +0.51 C |
| 1959 | 23.8 C | +0.47 C |
| 1960 | 23.2 C | -0.05 C |
| 1961 | 22.9 C | -0.38 C |
| 1962 | 23.4 C | +0.13 C |
| 1963 | 22.8 C | -0.46 C |
| 1964 | 22.1 C | -1.16 C |
| 1965 | 22.3 C | -0.97 C |
| 1966 | 23.2 C | -0.14 C |
| 1967 | 23.0 C | -0.29 C |
| 1968 | 22.9 C | -0.43 C |
| 1969 | 23.1 C | -0.16 C |
| 1970 | 22.5 C | -0.77 C |
| 1971 | 22.0 C | -1.32 C |
| 1972 | 22.7 C | -0.57 C |
| 1974 | 23.2 C | -0.06 C |
| 1975 | 22.5 C | -0.83 C |
| 1976 | 22.7 C | -0.59 C |
| 1977 | 23.3 C | -0.01 C |
| 1978 | 22.9 C | -0.36 C |
| 1979 | 22.3 C | -0.99 C |
| 1980 | 23.4 C | +0.09 C |
| 1981 | 24.3 C | +0.99 C |
| 1983 | 22.7 C | -0.55 C |
| 1984 | 23.1 C | -0.18 C |
| 1985 | 23.0 C | -0.29 C |
| 1986 | 23.3 C | +0.04 C |
| 1987 | 23.3 C | -0.02 C |
| 1988 | 23.7 C | +0.41 C |
| 1990 | 23.2 C | -0.09 C |
| 1991 | 22.5 C | -0.84 C |
| 1992 | 23.1 C | -0.19 C |
| 1993 | 22.1 C | -1.15 C |
| 1994 | 23.3 C | -0.01 C |
| 1995 | 24.1 C | +0.80 C |
| 1996 | 24.6 C | +1.31 C |
| 1997 | 24.2 C | +0.90 C |
| 1998 | 22.7 C | -0.61 C |
| 2000 | 24.0 C | +0.68 C |
| 2001 | 23.8 C | +0.52 C |
| 2002 | 24.0 C | +0.73 C |
| 2004 | 23.7 C | +0.39 C |
| 2005 | 23.6 C | +0.32 C |
| 2006 | 23.9 C | +0.63 C |
| 2007 | 24.3 C | +0.99 C |
| 2008 | 23.8 C | +0.52 C |
| 2009 | 24.2 C | +0.94 C |
| 2010 | 23.5 C | +0.16 C |
| 2012 | 24.6 C | +1.26 C |
| 2013 | 24.0 C | +0.66 C |
| 2014 | 25.0 C | +1.70 C |
| 2015 | 24.6 C | +1.26 C |
| 2019 | 23.3 C | -0.03 C |
| 2020 | 24.4 C | +1.15 C |
| 2021 | 24.1 C | +0.84 C |
| 2022 | 24.1 C | +0.77 C |
| 2023 | 23.9 C | +0.57 C |
| 2024 | 24.9 C | +1.57 C |
| 2025 | 24.8 C | +1.53 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1935 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 82 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 | 1935 to 2025 | 82 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1935 to 2025 | 82 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1935 to 2025 | 82 | 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
1935 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 52.8 C (127.0 F) | 2008 | 47.2 C (117.0 F) | 92 |
| Coldest night (TNn) | -6.1 C (21.0 F) | 1937 | -0.3 C (31.5 F) | 92 |
| Wettest day (Rx1day) | 75.7 mm (3.0 in) | 1939 | 20.0 mm (0.8 in) | 92 |
| Wettest five days (Rx5day) | 142.0 mm (5.6 in) | 1939 | 27.6 mm (1.1 in) | 92 |
| Longest dry spell (CDD) | 287 days | 1995 | 116 days | 92 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1935 | 45.6 C (114.1 F) |
| 1936 | 47.2 C (117.0 F) |
| 1937 | 47.2 C (117.0 F) |
| 1938 | 47.8 C (118.0 F) |
| 1939 | 46.7 C (116.1 F) |
| 1940 | 48.3 C (118.9 F) |
| 1941 | 46.7 C (116.1 F) |
| 1942 | 47.2 C (117.0 F) |
| 1943 | 46.7 C (116.1 F) |
| 1944 | 46.1 C (115.0 F) |
| 1945 | 46.1 C (115.0 F) |
| 1946 | 46.7 C (116.1 F) |
| 1947 | 45.6 C (114.1 F) |
| 1948 | 46.1 C (115.0 F) |
| 1949 | 46.1 C (115.0 F) |
| 1950 | 48.3 C (118.9 F) |
| 1951 | 46.1 C (115.0 F) |
| 1952 | 45.6 C (114.1 F) |
| 1953 | 46.1 C (115.0 F) |
| 1954 | 47.2 C (117.0 F) |
| 1955 | 47.2 C (117.0 F) |
| 1956 | 46.7 C (116.1 F) |
| 1957 | 47.8 C (118.0 F) |
| 1958 | 48.3 C (118.9 F) |
| 1959 | 47.2 C (117.0 F) |
| 1960 | 48.9 C (120.0 F) |
| 1961 | 48.3 C (118.9 F) |
| 1962 | 47.8 C (118.0 F) |
| 1963 | 45.6 C (114.1 F) |
| 1964 | 46.7 C (116.1 F) |
| 1965 | 45.6 C (114.1 F) |
| 1966 | 46.7 C (116.1 F) |
| 1967 | 49.4 C (120.9 F) |
| 1968 | 46.7 C (116.1 F) |
| 1969 | 47.8 C (118.0 F) |
| 1970 | 48.9 C (120.0 F) |
| 1971 | 46.1 C (115.0 F) |
| 1972 | 47.2 C (117.0 F) |
| 1973 | 48.3 C (118.9 F) |
| 1974 | 47.2 C (117.0 F) |
| 1975 | 46.7 C (116.1 F) |
| 1976 | 47.2 C (117.0 F) |
| 1977 | 47.2 C (117.0 F) |
| 1978 | 46.7 C (116.1 F) |
| 1979 | 46.7 C (116.1 F) |
| 1980 | 47.2 C (117.0 F) |
| 1981 | 47.2 C (117.0 F) |
| 1982 | 43.9 C (111.0 F) |
| 1983 | 46.1 C (115.0 F) |
| 1984 | 47.2 C (117.0 F) |
| 1985 | 47.2 C (117.0 F) |
| 1986 | 46.1 C (115.0 F) |
| 1987 | 49.4 C (120.9 F) |
| 1988 | 46.1 C (115.0 F) |
| 1989 | 47.8 C (118.0 F) |
| 1990 | 47.2 C (117.0 F) |
| 1991 | 46.7 C (116.1 F) |
| 1992 | 46.7 C (116.1 F) |
| 1993 | 48.9 C (120.0 F) |
| 1994 | 49.4 C (120.9 F) |
| 1995 | 49.4 C (120.9 F) |
| 1996 | 48.9 C (120.0 F) |
| 1997 | 47.2 C (117.0 F) |
| 1998 | 50.0 C (122.0 F) |
| 1999 | 47.8 C (118.0 F) |
| 2000 | 47.8 C (118.0 F) |
| 2001 | 48.3 C (118.9 F) |
| 2002 | 48.9 C (120.0 F) |
| 2003 | 46.7 C (116.1 F) |
| 2004 | 47.2 C (117.0 F) |
| 2005 | 50.0 C (122.0 F) |
| 2006 | 48.9 C (120.0 F) |
| 2007 | 49.4 C (120.9 F) |
| 2008 | 52.8 C (127.0 F) |
| 2009 | 48.9 C (120.0 F) |
| 2010 | 46.1 C (115.0 F) |
| 2011 | 47.2 C (117.0 F) |
| 2012 | 48.3 C (118.9 F) |
| 2013 | 52.8 C (127.0 F) |
| 2014 | 46.7 C (116.1 F) |
| 2015 | 47.2 C (117.0 F) |
| 2016 | 48.9 C (120.0 F) |
| 2017 | 49.4 C (120.9 F) |
| 2018 | 48.3 C (118.9 F) |
| 2019 | 47.2 C (117.0 F) |
| 2020 | 48.9 C (120.0 F) |
| 2021 | 49.4 C (120.9 F) |
| 2022 | 47.2 C (117.0 F) |
| 2023 | 48.9 C (120.0 F) |
| 2024 | 50.0 C (122.0 F) |
| 2025 | 47.2 C (117.0 F) |
| 2026 | 45.6 C (114.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1935 | -1.1 C (30.0 F) |
| 1936 | 0.0 C (32.0 F) |
| 1937 | -6.1 C (21.0 F) |
| 1938 | 1.1 C (34.0 F) |
| 1939 | 0.0 C (32.0 F) |
| 1940 | 1.7 C (35.1 F) |
| 1941 | 1.7 C (35.1 F) |
| 1942 | -1.1 C (30.0 F) |
| 1943 | -1.1 C (30.0 F) |
| 1944 | -2.2 C (28.0 F) |
| 1945 | 0.6 C (33.1 F) |
| 1946 | 0.6 C (33.1 F) |
| 1947 | 1.1 C (34.0 F) |
| 1948 | -1.7 C (28.9 F) |
| 1949 | -2.8 C (27.0 F) |
| 1950 | -3.9 C (25.0 F) |
| 1951 | -1.7 C (28.9 F) |
| 1952 | -2.8 C (27.0 F) |
| 1953 | -1.7 C (28.9 F) |
| 1954 | -1.1 C (30.0 F) |
| 1955 | 0.6 C (33.1 F) |
| 1956 | 0.6 C (33.1 F) |
| 1957 | 1.1 C (34.0 F) |
| 1958 | 1.1 C (34.0 F) |
| 1959 | 1.7 C (35.1 F) |
| 1960 | -2.8 C (27.0 F) |
| 1961 | 0.0 C (32.0 F) |
| 1962 | -4.4 C (24.1 F) |
| 1963 | -4.4 C (24.1 F) |
| 1964 | -2.2 C (28.0 F) |
| 1965 | -1.7 C (28.9 F) |
| 1966 | -1.1 C (30.0 F) |
| 1967 | -0.6 C (30.9 F) |
| 1968 | -3.9 C (25.0 F) |
| 1969 | 0.0 C (32.0 F) |
| 1970 | -2.2 C (28.0 F) |
| 1971 | -5.6 C (21.9 F) |
| 1972 | -5.6 C (21.9 F) |
| 1973 | -2.8 C (27.0 F) |
| 1974 | -4.4 C (24.1 F) |
| 1975 | -1.7 C (28.9 F) |
| 1976 | -1.1 C (30.0 F) |
| 1977 | 0.6 C (33.1 F) |
| 1978 | -1.7 C (28.9 F) |
| 1979 | -1.1 C (30.0 F) |
| 1980 | 3.3 C (37.9 F) |
| 1981 | 2.8 C (37.0 F) |
| 1982 | 0.6 C (33.1 F) |
| 1983 | 1.1 C (34.0 F) |
| 1984 | 1.7 C (35.1 F) |
| 1985 | -0.6 C (30.9 F) |
| 1986 | 1.1 C (34.0 F) |
| 1987 | -2.8 C (27.0 F) |
| 1988 | -1.1 C (30.0 F) |
| 1989 | -2.8 C (27.0 F) |
| 1990 | -4.4 C (24.1 F) |
| 1991 | -1.1 C (30.0 F) |
| 1992 | 0.0 C (32.0 F) |
| 1993 | -2.2 C (28.0 F) |
| 1994 | -0.6 C (30.9 F) |
| 1995 | -1.1 C (30.0 F) |
| 1996 | 1.1 C (34.0 F) |
| 1997 | 2.2 C (36.0 F) |
| 1998 | -1.7 C (28.9 F) |
| 1999 | 1.7 C (35.1 F) |
| 2000 | 2.8 C (37.0 F) |
| 2001 | 1.1 C (34.0 F) |
| 2002 | 1.1 C (34.0 F) |
| 2003 | -0.6 C (30.9 F) |
| 2004 | 1.1 C (34.0 F) |
| 2005 | 0.0 C (32.0 F) |
| 2006 | 1.1 C (34.0 F) |
| 2007 | -5.6 C (21.9 F) |
| 2008 | 1.7 C (35.1 F) |
| 2009 | 0.6 C (33.1 F) |
| 2010 | 0.0 C (32.0 F) |
| 2011 | -1.1 C (30.0 F) |
| 2012 | 2.2 C (36.0 F) |
| 2013 | -1.7 C (28.9 F) |
| 2014 | -0.6 C (30.9 F) |
| 2015 | -2.8 C (27.0 F) |
| 2016 | 0.6 C (33.1 F) |
| 2017 | 3.3 C (37.9 F) |
| 2018 | 0.6 C (33.1 F) |
| 2019 | -0.6 C (30.9 F) |
| 2020 | 0.0 C (32.0 F) |
| 2021 | 1.1 C (34.0 F) |
| 2022 | 0.0 C (32.0 F) |
| 2023 | 2.2 C (36.0 F) |
| 2024 | 0.6 C (33.1 F) |
| 2025 | 2.2 C (36.0 F) |
| 2026 | 3.9 C (39.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1935 | 16.5 mm (0.6 in) |
| 1936 | 25.4 mm (1.0 in) |
| 1937 | 8.9 mm (0.35 in) |
| 1938 | 20.1 mm (0.8 in) |
| 1939 | 75.7 mm (3.0 in) |
| 1940 | 19.1 mm (0.8 in) |
| 1941 | 23.6 mm (0.9 in) |
| 1942 | 31.2 mm (1.2 in) |
| 1943 | 16.5 mm (0.6 in) |
| 1944 | 19.1 mm (0.8 in) |
| 1945 | 12.4 mm (0.5 in) |
| 1946 | 6.1 mm (0.24 in) |
| 1947 | 17.8 mm (0.7 in) |
| 1948 | 27.9 mm (1.1 in) |
| 1949 | 32.5 mm (1.3 in) |
| 1950 | 16.5 mm (0.6 in) |
| 1951 | 41.9 mm (1.6 in) |
| 1952 | 18.8 mm (0.7 in) |
| 1953 | 2.8 mm (0.11 in) |
| 1954 | 19.1 mm (0.8 in) |
| 1955 | 21.3 mm (0.8 in) |
| 1956 | 3.8 mm (0.15 in) |
| 1957 | 27.9 mm (1.1 in) |
| 1958 | 8.6 mm (0.34 in) |
| 1959 | 20.3 mm (0.8 in) |
| 1960 | 25.1 mm (1.0 in) |
| 1961 | 12.2 mm (0.5 in) |
| 1962 | 37.1 mm (1.5 in) |
| 1963 | 26.7 mm (1.1 in) |
| 1964 | 9.1 mm (0.36 in) |
| 1965 | 23.6 mm (0.9 in) |
| 1966 | 17.8 mm (0.7 in) |
| 1967 | 18.3 mm (0.7 in) |
| 1968 | 52.8 mm (2.1 in) |
| 1969 | 17.5 mm (0.7 in) |
| 1970 | 31.8 mm (1.3 in) |
| 1971 | 15.2 mm (0.6 in) |
| 1972 | 27.4 mm (1.1 in) |
| 1973 | 6.4 mm (0.25 in) |
| 1974 | 19.6 mm (0.8 in) |
| 1975 | 2.8 mm (0.11 in) |
| 1976 | 26.7 mm (1.1 in) |
| 1977 | 26.7 mm (1.1 in) |
| 1978 | 20.8 mm (0.8 in) |
| 1979 | 35.6 mm (1.4 in) |
| 1980 | 14.2 mm (0.6 in) |
| 1981 | 17.3 mm (0.7 in) |
| 1982 | 17.5 mm (0.7 in) |
| 1983 | 27.9 mm (1.1 in) |
| 1984 | 24.6 mm (1.0 in) |
| 1985 | 14.7 mm (0.6 in) |
| 1986 | 33.0 mm (1.3 in) |
| 1987 | 20.6 mm (0.8 in) |
| 1988 | 17.0 mm (0.7 in) |
| 1989 | 21.6 mm (0.9 in) |
| 1990 | 16.5 mm (0.6 in) |
| 1991 | 21.6 mm (0.9 in) |
| 1992 | 26.7 mm (1.1 in) |
| 1993 | 30.5 mm (1.2 in) |
| 1994 | 19.8 mm (0.8 in) |
| 1995 | 17.3 mm (0.7 in) |
| 1996 | 9.4 mm (0.37 in) |
| 1997 | 33.0 mm (1.3 in) |
| 1998 | 16.0 mm (0.6 in) |
| 1999 | 14.7 mm (0.6 in) |
| 2000 | 37.6 mm (1.5 in) |
| 2001 | 11.4 mm (0.4 in) |
| 2002 | 6.1 mm (0.24 in) |
| 2003 | 22.9 mm (0.9 in) |
| 2004 | 31.8 mm (1.3 in) |
| 2005 | 24.9 mm (1.0 in) |
| 2006 | 1.5 mm (0.06 in) |
| 2007 | 37.1 mm (1.5 in) |
| 2008 | 31.8 mm (1.3 in) |
| 2009 | 34.0 mm (1.3 in) |
| 2010 | 33.8 mm (1.3 in) |
| 2011 | 19.8 mm (0.8 in) |
| 2012 | 21.8 mm (0.9 in) |
| 2013 | 13.7 mm (0.5 in) |
| 2014 | 51.3 mm (2.0 in) |
| 2015 | 10.7 mm (0.4 in) |
| 2016 | 33.0 mm (1.3 in) |
| 2017 | 20.6 mm (0.8 in) |
| 2018 | 26.9 mm (1.1 in) |
| 2019 | 45.0 mm (1.8 in) |
| 2020 | 14.5 mm (0.6 in) |
| 2021 | 18.5 mm (0.7 in) |
| 2022 | 18.0 mm (0.7 in) |
| 2023 | 10.9 mm (0.4 in) |
| 2024 | 38.1 mm (1.5 in) |
| 2025 | 19.3 mm (0.8 in) |
| 2026 | 13.2 mm (0.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1935 | 29.2 mm (1.1 in) |
| 1936 | 25.4 mm (1.0 in) |
| 1937 | 9.9 mm (0.39 in) |
| 1938 | 34.7 mm (1.4 in) |
| 1939 | 142.0 mm (5.6 in) |
| 1940 | 36.9 mm (1.5 in) |
| 1941 | 47.8 mm (1.9 in) |
| 1942 | 31.2 mm (1.2 in) |
| 1943 | 23.1 mm (0.9 in) |
| 1944 | 26.8 mm (1.1 in) |
| 1945 | 18.8 mm (0.7 in) |
| 1946 | 7.4 mm (0.29 in) |
| 1947 | 20.3 mm (0.8 in) |
| 1948 | 27.9 mm (1.1 in) |
| 1949 | 58.4 mm (2.3 in) |
| 1950 | 16.5 mm (0.6 in) |
| 1951 | 43.2 mm (1.7 in) |
| 1952 | 21.8 mm (0.9 in) |
| 1953 | 4.1 mm (0.16 in) |
| 1954 | 22.6 mm (0.9 in) |
| 1955 | 23.6 mm (0.9 in) |
| 1956 | 3.8 mm (0.15 in) |
| 1957 | 46.7 mm (1.8 in) |
| 1958 | 8.6 mm (0.34 in) |
| 1959 | 24.9 mm (1.0 in) |
| 1960 | 25.9 mm (1.0 in) |
| 1961 | 12.2 mm (0.5 in) |
| 1962 | 37.1 mm (1.5 in) |
| 1963 | 37.1 mm (1.5 in) |
| 1964 | 11.1 mm (0.4 in) |
| 1965 | 39.3 mm (1.5 in) |
| 1966 | 29.2 mm (1.1 in) |
| 1967 | 22.4 mm (0.9 in) |
| 1968 | 52.8 mm (2.1 in) |
| 1969 | 31.8 mm (1.3 in) |
| 1970 | 31.8 mm (1.3 in) |
| 1971 | 17.7 mm (0.7 in) |
| 1972 | 31.5 mm (1.2 in) |
| 1973 | 6.7 mm (0.26 in) |
| 1974 | 39.7 mm (1.6 in) |
| 1975 | 3.6 mm (0.14 in) |
| 1976 | 35.1 mm (1.4 in) |
| 1977 | 34.8 mm (1.4 in) |
| 1978 | 31.2 mm (1.2 in) |
| 1979 | 44.5 mm (1.8 in) |
| 1980 | 34.3 mm (1.4 in) |
| 1981 | 25.2 mm (1.0 in) |
| 1982 | 29.1 mm (1.1 in) |
| 1983 | 49.7 mm (2.0 in) |
| 1984 | 33.5 mm (1.3 in) |
| 1985 | 21.6 mm (0.9 in) |
| 1986 | 37.3 mm (1.5 in) |
| 1987 | 23.1 mm (0.9 in) |
| 1988 | 24.4 mm (1.0 in) |
| 1989 | 23.1 mm (0.9 in) |
| 1990 | 22.9 mm (0.9 in) |
| 1991 | 24.9 mm (1.0 in) |
| 1992 | 44.3 mm (1.7 in) |
| 1993 | 44.0 mm (1.7 in) |
| 1994 | 40.6 mm (1.6 in) |
| 1995 | 29.0 mm (1.1 in) |
| 1996 | 9.7 mm (0.38 in) |
| 1997 | 46.5 mm (1.8 in) |
| 1998 | 26.2 mm (1.0 in) |
| 1999 | 14.7 mm (0.6 in) |
| 2000 | 52.1 mm (2.1 in) |
| 2001 | 22.9 mm (0.9 in) |
| 2002 | 10.2 mm (0.4 in) |
| 2003 | 24.4 mm (1.0 in) |
| 2004 | 35.2 mm (1.4 in) |
| 2005 | 38.9 mm (1.5 in) |
| 2006 | 2.6 mm (0.10 in) |
| 2007 | 37.9 mm (1.5 in) |
| 2008 | 47.3 mm (1.9 in) |
| 2009 | 37.8 mm (1.5 in) |
| 2010 | 69.1 mm (2.7 in) |
| 2011 | 20.3 mm (0.8 in) |
| 2012 | 24.6 mm (1.0 in) |
| 2013 | 25.6 mm (1.0 in) |
| 2014 | 56.9 mm (2.2 in) |
| 2015 | 10.7 mm (0.4 in) |
| 2016 | 43.6 mm (1.7 in) |
| 2017 | 23.9 mm (0.9 in) |
| 2018 | 30.5 mm (1.2 in) |
| 2019 | 46.3 mm (1.8 in) |
| 2020 | 27.4 mm (1.1 in) |
| 2021 | 18.8 mm (0.7 in) |
| 2022 | 18.0 mm (0.7 in) |
| 2023 | 19.9 mm (0.8 in) |
| 2024 | 44.5 mm (1.8 in) |
| 2025 | 27.7 mm (1.1 in) |
| 2026 | 22.6 mm (0.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1935 | 156 days |
| 1936 | 128 days |
| 1937 | 259 days |
| 1938 | 118 days |
| 1939 | 121 days |
| 1940 | 153 days |
| 1941 | 88 days |
| 1942 | 123 days |
| 1943 | 121 days |
| 1944 | 197 days |
| 1945 | 107 days |
| 1946 | 196 days |
| 1947 | 87 days |
| 1948 | 204 days |
| 1949 | 225 days |
| 1950 | 126 days |
| 1951 | 64 days |
| 1952 | 85 days |
| 1953 | 148 days |
| 1954 | 115 days |
| 1955 | 177 days |
| 1956 | 207 days |
| 1957 | 104 days |
| 1958 | 78 days |
| 1959 | 138 days |
| 1960 | 119 days |
| 1961 | 147 days |
| 1962 | 152 days |
| 1963 | 119 days |
| 1964 | 70 days |
| 1965 | 98 days |
| 1966 | 126 days |
| 1967 | 88 days |
| 1968 | 120 days |
| 1969 | 71 days |
| 1970 | 141 days |
| 1971 | 79 days |
| 1972 | 156 days |
| 1973 | 231 days |
| 1974 | 227 days |
| 1975 | 107 days |
| 1976 | 100 days |
| 1977 | 66 days |
| 1978 | 123 days |
| 1979 | 134 days |
| 1980 | 113 days |
| 1981 | 82 days |
| 1982 | 74 days |
| 1983 | 130 days |
| 1984 | 147 days |
| 1985 | 90 days |
| 1986 | 131 days |
| 1987 | 88 days |
| 1988 | 119 days |
| 1989 | 143 days |
| 1990 | 57 days |
| 1991 | 134 days |
| 1992 | 85 days |
| 1993 | 150 days |
| 1994 | 93 days |
| 1995 | 287 days |
| 1996 | 157 days |
| 1997 | 109 days |
| 1998 | 117 days |
| 1999 | 99 days |
| 2000 | 148 days |
| 2001 | 98 days |
| 2002 | 91 days |
| 2003 | 77 days |
| 2004 | 131 days |
| 2005 | 138 days |
| 2006 | 115 days |
| 2007 | 100 days |
| 2008 | 90 days |
| 2009 | 192 days |
| 2010 | 171 days |
| 2011 | 82 days |
| 2012 | 79 days |
| 2013 | 79 days |
| 2014 | 63 days |
| 2015 | 57 days |
| 2016 | 96 days |
| 2017 | 42 days |
| 2018 | 93 days |
| 2019 | 74 days |
| 2020 | 112 days |
| 2021 | 68 days |
| 2022 | 87 days |
| 2023 | 140 days |
| 2024 | 169 days |
| 2025 | 106 days |
| 2026 | 93 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.
Rainfall Return Levels
89 years, 1935 to 2025A day with at least 20.6 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 57.5 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 | 20.6 mm (0.8 in) | |
| 5 years | 30.9 mm (1.2 in) | |
| 10 years | 37.6 mm (1.5 in) | |
| 25 years | 45.8 mm (1.8 in) | |
| 50 years | 51.7 mm (2.0 in) | |
| 100 years | 57.5 mm (2.3 in) | Longer than the 89 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, 89 years of values from 1935 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: 75.7 mm (3.0 in) in 1939; 52.8 mm (2.1 in) in 1968; 51.3 mm (2.0 in) in 2014.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Iron Mtn, at 1965. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1965 ran 0.4 C (0.7 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1965 | -0.4 | -0.7 | 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
2007 to 2025 against 1961 to 1990Over 2007 to 2025, Iron Mtn had a mean temperature of 24.2 C (75.6 F) and 95.9 mm (3.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Yuma WSO AP (United States, 172 km away), Phoenix City (United States, 291 km away) and Gold Rock Rch (United States, 143 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Yuma WSO AP | United States | 172 km (107 mi) | 23.4 C (74.1 F) | 80.7 mm (3.2 in) | 1.26 |
| Phoenix City | United States | 291 km (181 mi) | 23.1 C (73.7 F) | 195.5 mm (7.7 in) | 1.34 |
| Gold Rock Rch | United States | 143 km (89 mi) | 23.4 C (74.0 F) | 96.3 mm (3.8 in) | 1.42 |
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).