Boca Weather Records (USC00040931)
Record envelope, standing records and threshold days for Boca (USC00040931), California, United States, with 121 years of record.
Key Facts for Boca
- Boca (USC00040931) is a weather station in California, United States at 39.39 latitude and -120.09 longitude, 1,699 m (5,575 ft) above sea level.
- The station reports from 1906 to 2026, 121 years of record.
- 1,464 records set at Boca still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Boca tied a daily record high maximum temperature of 30.0 C (86.0 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, 39.39 latitude, -120.09 longitude.
- Elevation: 1,699 m (5,575 ft).
- Period of record: 1906 to 2026, 121 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
21 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.0 C (68.0 F) | -42.8 C (-45.0 F) | 16.1 C (61.0 F) | -16.1 C (3.0 F) |
| Feb | 23.3 C (73.9 F) | -41.7 C (-43.1 F) | 17.2 C (63.0 F) | -16.7 C (1.9 F) |
| Mar | 29.4 C (84.9 F) | -31.1 C (-24.0 F) | 29.4 C (84.9 F) | -6.1 C (21.0 F) |
| Apr | 29.4 C (84.9 F) | -20.0 C (-4.0 F) | 22.2 C (72.0 F) | -7.8 C (18.0 F) |
| May | 33.3 C (91.9 F) | -12.2 C (10.0 F) | 30.0 C (86.0 F) | -5.6 C (21.9 F) |
| Jun | 36.7 C (98.1 F) | -8.9 C (16.0 F) | 34.4 C (93.9 F) | -1.7 C (28.9 F) |
| Jul | 39.4 C (102.9 F) | -6.1 C (21.0 F) | 33.9 C (93.0 F) | 0.6 C (33.1 F) |
| Aug | 37.8 C (100.0 F) | -7.8 C (18.0 F) | 37.8 C (100.0 F) | 0.6 C (33.1 F) |
| Sep | 39.4 C (102.9 F) | -12.2 C (10.0 F) | 27.2 C (81.0 F) | -3.9 C (25.0 F) |
| Oct | 32.8 C (91.0 F) | -16.7 C (1.9 F) | 31.1 C (88.0 F) | 0.0 C (32.0 F) |
| Nov | 26.1 C (79.0 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Dec | 21.1 C (70.0 F) | -35.0 C (-31.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1936 | 2 |
| 1937 | 40 |
| 1938 | 15 |
| 1939 | 16 |
| 1940 | 16 |
| 1941 | 15 |
| 1942 | 12 |
| 1943 | 16 |
| 1944 | 15 |
| 1945 | 16 |
| 1946 | 12 |
| 1947 | 11 |
| 1948 | 23 |
| 1949 | 28 |
| 1950 | 20 |
| 1951 | 24 |
| 1952 | 23 |
| 1953 | 14 |
| 1954 | 20 |
| 1955 | 14 |
| 1956 | 19 |
| 1957 | 24 |
| 1958 | 16 |
| 1959 | 21 |
| 1960 | 15 |
| 1961 | 15 |
| 1962 | 26 |
| 1963 | 22 |
| 1964 | 25 |
| 1965 | 19 |
| 1966 | 23 |
| 1967 | 28 |
| 1968 | 16 |
| 1969 | 13 |
| 1970 | 12 |
| 1971 | 12 |
| 1972 | 23 |
| 1973 | 10 |
| 1974 | 10 |
| 1975 | 24 |
| 1976 | 21 |
| 1977 | 20 |
| 1978 | 15 |
| 1979 | 8 |
| 1980 | 11 |
| 1981 | 17 |
| 1982 | 12 |
| 1983 | 14 |
| 1984 | 8 |
| 1985 | 22 |
| 1986 | 20 |
| 1987 | 18 |
| 1988 | 24 |
| 1989 | 25 |
| 1990 | 24 |
| 1991 | 15 |
| 1992 | 13 |
| 1993 | 4 |
| 1994 | 10 |
| 1995 | 19 |
| 1996 | 18 |
| 1997 | 5 |
| 1999 | 4 |
| 2000 | 17 |
| 2001 | 7 |
| 2002 | 13 |
| 2003 | 18 |
| 2004 | 11 |
| 2005 | 6 |
| 2006 | 11 |
| 2007 | 8 |
| 2008 | 10 |
| 2009 | 19 |
| 2010 | 14 |
| 2011 | 8 |
| 2012 | 17 |
| 2013 | 20 |
| 2014 | 12 |
| 2015 | 31 |
| 2016 | 11 |
| 2017 | 14 |
| 2018 | 11 |
| 2019 | 9 |
| 2020 | 16 |
| 2021 | 29 |
| 2022 | 13 |
| 2023 | 15 |
| 2024 | 15 |
| 2025 | 20 |
| 2026 | 17 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1968-07-29 | Record high minimum temperature | Record high minimum temperature 14.4 C (57.9 F) |
| 1972-07-15 | Record high maximum temperature | Record high maximum temperature 36.7 C (98.1 F) |
| 1981-08-09 | Record high maximum temperature | Record high maximum temperature 37.2 C (99.0 F) |
| 2001-09-03 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
Wettest Day of Each Month
Mar: 152.4 mm (6.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 121.9 mm (4.8 in) | 11 January 1911 |
| Feb | 88.9 mm (3.5 in) | 26 February 1917 |
| Mar | 152.4 mm (6.0 in) | 20 March 1907 |
| Apr | 60.5 mm (2.4 in) | 3 April 1958 |
| May | 48.3 mm (1.9 in) | 10 May 1915 |
| Jun | 37.1 mm (1.5 in) | 6 June 2011 |
| Jul | 50.8 mm (2.0 in) | 26 July 1985 |
| Aug | 70.6 mm (2.8 in) | 8 August 1961 |
| Sep | 31.5 mm (1.2 in) | 14 September 2017 |
| Oct | 119.9 mm (4.7 in) | 25 October 2021 |
| Nov | 64.8 mm (2.6 in) | 10 November 1949 |
| Dec | 100.3 mm (3.9 in) | 31 December 2005 |
Period of Record Coverage
1936 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1936 | 31 | 8% | No |
| 1937 | 363 | 99% | Yes |
| 1938 | 335 | 92% | Yes |
| 1939 | 362 | 99% | Yes |
| 1940 | 335 | 92% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 363 | 99% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 364 | 99% | Yes |
| 1945 | 349 | 96% | Yes |
| 1946 | 360 | 99% | Yes |
| 1947 | 359 | 98% | Yes |
| 1948 | 355 | 97% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 359 | 98% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | 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 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 334 | 92% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 333 | 91% | Yes |
| 1996 | 363 | 99% | Yes |
| 1997 | 241 | 66% | No |
| 1999 | 237 | 65% | No |
| 2000 | 301 | 82% | No |
| 2001 | 240 | 66% | No |
| 2002 | 363 | 99% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 358 | 98% | Yes |
| 2007 | 302 | 83% | No |
| 2008 | 337 | 92% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 362 | 99% | Yes |
| 2011 | 359 | 98% | Yes |
| 2012 | 365 | 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 | 364 | 99% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 264 | 72% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 October 2026 | Boca, US | daily high max (Tie, Provisional) | 30.0 C (86.0 F) | tie | 39 years | 5 of 100 (Routine) |
| 4 October 2026 | Boca, US | daily high max (Provisional) | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 45 years | 22 of 100 (Routine) |
| 29 August 2026 | Boca, US | daily high min (Tie, Provisional) | 7.8 C (46.0 F) | tie | 76 years | 8 of 100 (Routine) |
| 9 August 2026 | Boca, US | monthly high max | 37.8 C (100.0 F) | 0.6 C (1.1 F) | 44 years | 33 of 100 (Routine) |
| 8 August 2026 | Boca, US | daily high min | 13.3 C (55.9 F) | 2.2 C (4.0 F) | 68 years | 36 of 100 (Notable) |
| 8 August 2026 | Boca, US | daily high max (Tie) | 36.7 C (98.1 F) | tie | 53 years | 6 of 100 (Routine) |
| 6 August 2026 | Boca, US | daily high max | 35.0 C (95.0 F) | 1.1 C (2.0 F) | 53 years | 27 of 100 (Routine) |
| 22 July 2026 | Boca, US | daily high min | 12.8 C (55.0 F) | 1.7 C (3.1 F) | 80 years | 38 of 100 (Notable) |
| 21 July 2026 | Boca, US | daily high min | 13.3 C (55.9 F) | 2.2 C (4.0 F) | 40 years | 28 of 100 (Routine) |
| 20 July 2026 | Boca, US | daily high min (Tie) | 11.7 C (53.1 F) | tie | 23 years | 4 of 100 (Routine) |
| 14 July 2026 | Boca, US | daily rain | 16.3 mm (0.6 in) | 2.3 mm (0.09 in) | 33 years | 20 of 100 (Routine) |
| 19 June 2026 | Boca, US | daily high min | 11.1 C (52.0 F) | 2.8 C (5.0 F) | 83 years | 42 of 100 (Notable) |
| 18 June 2026 | Boca, US | daily high min (Tie) | 8.9 C (48.0 F) | tie | 40 years | 5 of 100 (Routine) |
| 16 June 2026 | Boca, US | daily high max (Tie) | 32.8 C (91.0 F) | tie | 40 years | 5 of 100 (Routine) |
| 12 May 2026 | Boca, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 12 years | 3 of 100 (Routine) |
| 11 May 2026 | Boca, US | daily high max | 28.3 C (82.9 F) | 1.1 C (2.0 F) | 24 years | 17 of 100 (Routine) |
| 12 April 2026 | Boca, US | daily rain | 14.5 mm (0.6 in) | 2.6 mm (0.10 in) | 59 years | 20 of 100 (Routine) |
| 29 March 2026 | Boca, US | daily high max | 23.9 C (75.0 F) | 1.1 C (2.0 F) | 40 years | 23 of 100 (Routine) |
| 28 March 2026 | Boca, US | daily high max (Tie) | 22.2 C (72.0 F) | tie | 11 years | 3 of 100 (Routine) |
| 25 March 2026 | Boca, US | daily high max | 24.4 C (75.9 F) | 1.6 C (2.9 F) | 4 years | 12 of 100 (Routine) |
Climate Trend
78 complete years, 1937 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1937 | 4.9 C | -1.21 C |
| 1939 | 6.4 C | +0.23 C |
| 1941 | 5.8 C | -0.35 C |
| 1942 | 5.4 C | -0.76 C |
| 1943 | 6.2 C | +0.07 C |
| 1944 | 4.8 C | -1.33 C |
| 1946 | 5.4 C | -0.76 C |
| 1947 | 6.1 C | -0.05 C |
| 1948 | 4.7 C | -1.40 C |
| 1949 | 4.3 C | -1.78 C |
| 1950 | 5.7 C | -0.42 C |
| 1951 | 4.7 C | -1.40 C |
| 1952 | 4.0 C | -2.08 C |
| 1953 | 5.7 C | -0.46 C |
| 1954 | 5.6 C | -0.48 C |
| 1955 | 4.7 C | -1.45 C |
| 1956 | 4.9 C | -1.21 C |
| 1957 | 5.0 C | -1.12 C |
| 1958 | 6.2 C | +0.09 C |
| 1959 | 6.0 C | -0.13 C |
| 1960 | 5.5 C | -0.65 C |
| 1961 | 6.5 C | +0.35 C |
| 1962 | 5.8 C | -0.33 C |
| 1963 | 6.3 C | +0.13 C |
| 1964 | 5.0 C | -1.08 C |
| 1965 | 5.3 C | -0.78 C |
| 1966 | 5.5 C | -0.65 C |
| 1967 | 5.5 C | -0.58 C |
| 1968 | 5.7 C | -0.42 C |
| 1969 | 5.6 C | -0.55 C |
| 1970 | 6.6 C | +0.51 C |
| 1971 | 5.1 C | -1.02 C |
| 1972 | 5.8 C | -0.37 C |
| 1973 | 5.9 C | -0.27 C |
| 1974 | 6.5 C | +0.38 C |
| 1975 | 5.3 C | -0.80 C |
| 1976 | 5.7 C | -0.40 C |
| 1977 | 5.9 C | -0.20 C |
| 1978 | 6.1 C | +0.01 C |
| 1979 | 6.0 C | -0.13 C |
| 1980 | 6.8 C | +0.66 C |
| 1981 | 7.6 C | +1.45 C |
| 1982 | 4.9 C | -1.21 C |
| 1983 | 5.8 C | -0.35 C |
| 1984 | 6.4 C | +0.23 C |
| 1985 | 5.4 C | -0.73 C |
| 1986 | 7.3 C | +1.21 C |
| 1987 | 7.0 C | +0.88 C |
| 1988 | 6.4 C | +0.25 C |
| 1989 | 5.7 C | -0.42 C |
| 1991 | 6.0 C | -0.10 C |
| 1992 | 6.5 C | +0.33 C |
| 1993 | 5.2 C | -0.94 C |
| 1994 | 5.8 C | -0.28 C |
| 1996 | 7.0 C | +0.86 C |
| 2002 | 6.6 C | +0.43 C |
| 2003 | 7.2 C | +1.10 C |
| 2004 | 6.6 C | +0.52 C |
| 2005 | 6.7 C | +0.56 C |
| 2006 | 6.8 C | +0.70 C |
| 2008 | 5.9 C | -0.22 C |
| 2009 | 6.4 C | +0.30 C |
| 2010 | 6.2 C | +0.10 C |
| 2011 | 5.7 C | -0.43 C |
| 2012 | 7.1 C | +1.02 C |
| 2013 | 6.2 C | +0.11 C |
| 2014 | 8.0 C | +1.85 C |
| 2015 | 7.8 C | +1.63 C |
| 2016 | 7.3 C | +1.20 C |
| 2017 | 7.3 C | +1.19 C |
| 2018 | 7.3 C | +1.14 C |
| 2019 | 6.4 C | +0.25 C |
| 2020 | 8.0 C | +1.86 C |
| 2021 | 8.1 C | +1.97 C |
| 2022 | 7.0 C | +0.90 C |
| 2023 | 6.3 C | +0.16 C |
| 2024 | 8.2 C | +2.03 C |
| 2025 | 8.7 C | +2.57 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.3) per decade over 1937 to 2025. In Fahrenheit: 0.5 F (0.4 to 0.6) per decade. The slope is a straight line fitted to 78 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.4 to 0.6) per decade | 1937 to 2025 | 78 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.4 to 0.6) per decade | 1937 to 2025 | 78 | Rise |
| Mean daily minimum | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.6) per decade | 1937 to 2025 | 78 | 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
1906 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 2001 | 35.0 C (95.0 F) | 90 |
| Coldest night (TNn) | -42.8 C (-45.0 F) | 1937 | -25.6 C (-14.1 F) | 91 |
| Wettest day (Rx1day) | 152.4 mm (6.0 in) | 1907 | 50.8 mm (2.0 in) | 103 |
| Wettest five days (Rx5day) | 310.6 mm (12.2 in) | 1986 | 97.8 mm (3.9 in) | 103 |
| Longest dry spell (CDD) | 133 days | 1907 | 53 days | 103 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1906 | n/a |
| 1907 | n/a |
| 1908 | n/a |
| 1909 | n/a |
| 1910 | n/a |
| 1911 | n/a |
| 1912 | n/a |
| 1913 | n/a |
| 1914 | n/a |
| 1915 | n/a |
| 1916 | n/a |
| 1917 | n/a |
| 1918 | n/a |
| 1936 | 16.7 C (62.1 F) |
| 1937 | 35.6 C (96.1 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 32.8 C (91.0 F) |
| 1940 | 35.6 C (96.1 F) |
| 1941 | 33.3 C (91.9 F) |
| 1942 | 33.9 C (93.0 F) |
| 1943 | 33.3 C (91.9 F) |
| 1944 | 33.3 C (91.9 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 34.4 C (93.9 F) |
| 1947 | 32.8 C (91.0 F) |
| 1948 | 33.3 C (91.9 F) |
| 1949 | 33.3 C (91.9 F) |
| 1950 | 35.6 C (96.1 F) |
| 1951 | 33.3 C (91.9 F) |
| 1952 | 32.8 C (91.0 F) |
| 1953 | 32.8 C (91.0 F) |
| 1954 | 35.0 C (95.0 F) |
| 1955 | 35.0 C (95.0 F) |
| 1956 | 32.8 C (91.0 F) |
| 1957 | 33.3 C (91.9 F) |
| 1958 | 32.8 C (91.0 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 36.1 C (97.0 F) |
| 1961 | 34.4 C (93.9 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 33.3 C (91.9 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 31.7 C (89.1 F) |
| 1966 | 35.6 C (96.1 F) |
| 1967 | 33.9 C (93.0 F) |
| 1968 | 35.6 C (96.1 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 34.4 C (93.9 F) |
| 1972 | 36.7 C (98.1 F) |
| 1973 | 33.3 C (91.9 F) |
| 1974 | 33.3 C (91.9 F) |
| 1975 | 34.4 C (93.9 F) |
| 1976 | 33.9 C (93.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 35.6 C (96.1 F) |
| 1980 | 35.0 C (95.0 F) |
| 1981 | 37.2 C (99.0 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 35.6 C (96.1 F) |
| 1984 | 35.0 C (95.0 F) |
| 1985 | 35.6 C (96.1 F) |
| 1986 | 33.3 C (91.9 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 36.7 C (98.1 F) |
| 1989 | 33.3 C (91.9 F) |
| 1990 | 33.9 C (93.0 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 35.6 C (96.1 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 32.2 C (90.0 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 33.9 C (93.0 F) |
| 1999 | 32.8 C (91.0 F) |
| 2000 | 33.3 C (91.9 F) |
| 2001 | 39.4 C (102.9 F) |
| 2002 | 39.4 C (102.9 F) |
| 2003 | 37.2 C (99.0 F) |
| 2004 | 35.0 C (95.0 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 36.1 C (97.0 F) |
| 2009 | 35.6 C (96.1 F) |
| 2010 | 35.0 C (95.0 F) |
| 2011 | 33.3 C (91.9 F) |
| 2012 | 35.0 C (95.0 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 36.7 C (98.1 F) |
| 2015 | 33.9 C (93.0 F) |
| 2016 | 36.7 C (98.1 F) |
| 2017 | 36.1 C (97.0 F) |
| 2018 | 36.1 C (97.0 F) |
| 2019 | 35.0 C (95.0 F) |
| 2020 | 36.7 C (98.1 F) |
| 2021 | 36.7 C (98.1 F) |
| 2022 | 36.7 C (98.1 F) |
| 2023 | 36.1 C (97.0 F) |
| 2024 | 37.2 C (99.0 F) |
| 2025 | 36.7 C (98.1 F) |
| 2026 | 37.8 C (100.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1906 | n/a |
| 1907 | n/a |
| 1908 | n/a |
| 1909 | n/a |
| 1910 | n/a |
| 1911 | n/a |
| 1912 | n/a |
| 1913 | n/a |
| 1914 | n/a |
| 1915 | n/a |
| 1916 | -11.1 C (12.0 F) |
| 1917 | n/a |
| 1918 | n/a |
| 1936 | -23.3 C (-9.9 F) |
| 1937 | -42.8 C (-45.0 F) |
| 1938 | -32.2 C (-26.0 F) |
| 1939 | -31.7 C (-25.1 F) |
| 1940 | -24.4 C (-11.9 F) |
| 1941 | -17.2 C (1.0 F) |
| 1942 | -29.4 C (-20.9 F) |
| 1943 | -28.3 C (-18.9 F) |
| 1944 | -23.9 C (-11.0 F) |
| 1945 | -22.8 C (-9.0 F) |
| 1946 | -32.2 C (-26.0 F) |
| 1947 | -27.2 C (-17.0 F) |
| 1948 | -30.6 C (-23.1 F) |
| 1949 | -40.6 C (-41.1 F) |
| 1950 | -37.2 C (-35.0 F) |
| 1951 | -35.0 C (-31.0 F) |
| 1952 | -39.4 C (-38.9 F) |
| 1953 | -20.0 C (-4.0 F) |
| 1954 | -23.9 C (-11.0 F) |
| 1955 | -31.7 C (-25.1 F) |
| 1956 | -33.9 C (-29.0 F) |
| 1957 | -32.8 C (-27.0 F) |
| 1958 | -23.3 C (-9.9 F) |
| 1959 | -30.0 C (-22.0 F) |
| 1960 | -32.8 C (-27.0 F) |
| 1961 | -22.2 C (-8.0 F) |
| 1962 | -38.3 C (-36.9 F) |
| 1963 | -26.1 C (-15.0 F) |
| 1964 | -22.2 C (-8.0 F) |
| 1965 | -31.7 C (-25.1 F) |
| 1966 | -31.7 C (-25.1 F) |
| 1967 | -22.8 C (-9.0 F) |
| 1968 | -33.3 C (-27.9 F) |
| 1969 | -31.7 C (-25.1 F) |
| 1970 | -22.2 C (-8.0 F) |
| 1971 | -28.9 C (-20.0 F) |
| 1972 | -33.3 C (-27.9 F) |
| 1973 | -27.2 C (-17.0 F) |
| 1974 | -23.3 C (-9.9 F) |
| 1975 | -25.0 C (-13.0 F) |
| 1976 | -25.6 C (-14.1 F) |
| 1977 | -24.4 C (-11.9 F) |
| 1978 | -27.8 C (-18.0 F) |
| 1979 | -30.0 C (-22.0 F) |
| 1980 | -21.7 C (-7.1 F) |
| 1981 | -15.6 C (3.9 F) |
| 1982 | -28.3 C (-18.9 F) |
| 1983 | -20.6 C (-5.1 F) |
| 1984 | -22.2 C (-8.0 F) |
| 1985 | -28.3 C (-18.9 F) |
| 1986 | -16.7 C (1.9 F) |
| 1987 | -22.8 C (-9.0 F) |
| 1988 | -31.1 C (-24.0 F) |
| 1989 | -41.7 C (-43.1 F) |
| 1990 | -33.3 C (-27.9 F) |
| 1991 | -22.8 C (-9.0 F) |
| 1992 | -30.0 C (-22.0 F) |
| 1993 | -34.4 C (-29.9 F) |
| 1994 | -22.8 C (-9.0 F) |
| 1995 | -22.8 C (-9.0 F) |
| 1996 | -18.3 C (-0.9 F) |
| 1997 | -25.0 C (-13.0 F) |
| 1999 | -15.0 C (5.0 F) |
| 2000 | -15.6 C (3.9 F) |
| 2001 | -22.2 C (-8.0 F) |
| 2002 | -30.0 C (-22.0 F) |
| 2003 | -18.3 C (-0.9 F) |
| 2004 | -25.6 C (-14.1 F) |
| 2005 | -25.6 C (-14.1 F) |
| 2006 | -20.0 C (-4.0 F) |
| 2007 | -22.8 C (-9.0 F) |
| 2008 | -26.1 C (-15.0 F) |
| 2009 | -26.1 C (-15.0 F) |
| 2010 | -21.7 C (-7.1 F) |
| 2011 | -26.7 C (-16.1 F) |
| 2012 | -23.3 C (-9.9 F) |
| 2013 | -30.0 C (-22.0 F) |
| 2014 | -16.1 C (3.0 F) |
| 2015 | -23.3 C (-9.9 F) |
| 2016 | -26.7 C (-16.1 F) |
| 2017 | -24.4 C (-11.9 F) |
| 2018 | -24.4 C (-11.9 F) |
| 2019 | -28.9 C (-20.0 F) |
| 2020 | -15.0 C (5.0 F) |
| 2021 | -16.7 C (1.9 F) |
| 2022 | -22.2 C (-8.0 F) |
| 2023 | -28.3 C (-18.9 F) |
| 2024 | -20.0 C (-4.0 F) |
| 2025 | -15.6 C (3.9 F) |
| 2026 | -16.7 C (1.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1906 | 59.4 mm (2.3 in) |
| 1907 | 152.4 mm (6.0 in) |
| 1908 | 50.8 mm (2.0 in) |
| 1909 | 73.7 mm (2.9 in) |
| 1910 | 30.5 mm (1.2 in) |
| 1911 | 121.9 mm (4.8 in) |
| 1912 | 30.5 mm (1.2 in) |
| 1913 | 55.9 mm (2.2 in) |
| 1914 | 61.0 mm (2.4 in) |
| 1915 | 76.2 mm (3.0 in) |
| 1916 | 96.5 mm (3.8 in) |
| 1917 | 88.9 mm (3.5 in) |
| 1918 | 50.8 mm (2.0 in) |
| 1936 | 33.0 mm (1.3 in) |
| 1937 | 48.5 mm (1.9 in) |
| 1938 | 46.7 mm (1.8 in) |
| 1939 | 32.0 mm (1.3 in) |
| 1940 | 48.3 mm (1.9 in) |
| 1941 | 45.0 mm (1.8 in) |
| 1942 | 48.3 mm (1.9 in) |
| 1943 | 63.2 mm (2.5 in) |
| 1944 | 64.0 mm (2.5 in) |
| 1945 | 58.2 mm (2.3 in) |
| 1946 | 55.9 mm (2.2 in) |
| 1947 | 34.8 mm (1.4 in) |
| 1948 | 32.5 mm (1.3 in) |
| 1949 | 64.8 mm (2.6 in) |
| 1950 | 56.1 mm (2.2 in) |
| 1951 | 51.6 mm (2.0 in) |
| 1952 | 49.5 mm (1.9 in) |
| 1953 | 40.9 mm (1.6 in) |
| 1954 | 31.2 mm (1.2 in) |
| 1955 | 71.1 mm (2.8 in) |
| 1956 | 45.7 mm (1.8 in) |
| 1957 | 39.9 mm (1.6 in) |
| 1958 | 60.5 mm (2.4 in) |
| 1959 | 48.5 mm (1.9 in) |
| 1960 | 48.3 mm (1.9 in) |
| 1961 | 70.6 mm (2.8 in) |
| 1962 | 70.4 mm (2.8 in) |
| 1963 | 73.2 mm (2.9 in) |
| 1964 | 67.6 mm (2.7 in) |
| 1965 | 38.1 mm (1.5 in) |
| 1966 | 36.8 mm (1.4 in) |
| 1967 | 70.4 mm (2.8 in) |
| 1968 | 34.8 mm (1.4 in) |
| 1969 | 59.7 mm (2.4 in) |
| 1970 | 40.6 mm (1.6 in) |
| 1971 | 40.6 mm (1.6 in) |
| 1972 | 38.1 mm (1.5 in) |
| 1973 | 45.0 mm (1.8 in) |
| 1974 | 34.3 mm (1.4 in) |
| 1975 | 41.1 mm (1.6 in) |
| 1976 | 26.7 mm (1.1 in) |
| 1977 | 56.4 mm (2.2 in) |
| 1978 | 44.5 mm (1.8 in) |
| 1979 | 59.4 mm (2.3 in) |
| 1980 | 48.3 mm (1.9 in) |
| 1981 | 55.9 mm (2.2 in) |
| 1982 | 55.1 mm (2.2 in) |
| 1983 | 60.5 mm (2.4 in) |
| 1984 | 44.5 mm (1.8 in) |
| 1985 | 50.8 mm (2.0 in) |
| 1986 | 71.6 mm (2.8 in) |
| 1987 | 41.9 mm (1.6 in) |
| 1988 | 58.4 mm (2.3 in) |
| 1989 | 59.2 mm (2.3 in) |
| 1990 | 36.8 mm (1.4 in) |
| 1991 | 40.6 mm (1.6 in) |
| 1992 | 58.4 mm (2.3 in) |
| 1993 | 38.9 mm (1.5 in) |
| 1994 | 29.2 mm (1.1 in) |
| 1995 | 43.7 mm (1.7 in) |
| 1996 | 60.5 mm (2.4 in) |
| 1997 | 59.9 mm (2.4 in) |
| 1999 | 22.6 mm (0.9 in) |
| 2000 | 45.7 mm (1.8 in) |
| 2001 | 34.8 mm (1.4 in) |
| 2002 | 43.4 mm (1.7 in) |
| 2003 | 33.3 mm (1.3 in) |
| 2004 | 59.2 mm (2.3 in) |
| 2005 | 100.3 mm (3.9 in) |
| 2006 | 56.4 mm (2.2 in) |
| 2007 | 41.9 mm (1.6 in) |
| 2008 | 75.9 mm (3.0 in) |
| 2009 | 47.2 mm (1.9 in) |
| 2010 | 51.1 mm (2.0 in) |
| 2011 | 47.0 mm (1.9 in) |
| 2012 | 51.6 mm (2.0 in) |
| 2013 | 18.3 mm (0.7 in) |
| 2014 | 70.1 mm (2.8 in) |
| 2015 | 50.5 mm (2.0 in) |
| 2016 | 51.6 mm (2.0 in) |
| 2017 | 76.7 mm (3.0 in) |
| 2018 | 47.5 mm (1.9 in) |
| 2019 | 55.6 mm (2.2 in) |
| 2020 | 37.6 mm (1.5 in) |
| 2021 | 119.9 mm (4.7 in) |
| 2022 | 68.6 mm (2.7 in) |
| 2023 | 53.8 mm (2.1 in) |
| 2024 | 56.1 mm (2.2 in) |
| 2025 | 66.5 mm (2.6 in) |
| 2026 | 44.5 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1906 | 102.3 mm (4.0 in) |
| 1907 | 305.6 mm (12.0 in) |
| 1908 | 92.7 mm (3.6 in) |
| 1909 | 107.7 mm (4.2 in) |
| 1910 | 17.7 mm (0.7 in) |
| 1911 | 309.8 mm (12.2 in) |
| 1912 | 40.6 mm (1.6 in) |
| 1913 | 142.3 mm (5.6 in) |
| 1914 | 137.6 mm (5.4 in) |
| 1915 | 119.4 mm (4.7 in) |
| 1916 | 198.1 mm (7.8 in) |
| 1917 | 60.9 mm (2.4 in) |
| 1918 | 122.0 mm (4.8 in) |
| 1936 | 59.7 mm (2.4 in) |
| 1937 | 108.2 mm (4.3 in) |
| 1938 | 133.0 mm (5.2 in) |
| 1939 | 39.3 mm (1.5 in) |
| 1940 | 117.9 mm (4.6 in) |
| 1941 | 63.5 mm (2.5 in) |
| 1942 | 139.4 mm (5.5 in) |
| 1943 | 172.4 mm (6.8 in) |
| 1944 | 94.5 mm (3.7 in) |
| 1945 | 114.9 mm (4.5 in) |
| 1946 | 128.6 mm (5.1 in) |
| 1947 | 51.3 mm (2.0 in) |
| 1948 | 47.0 mm (1.9 in) |
| 1949 | 67.6 mm (2.7 in) |
| 1950 | 161.2 mm (6.3 in) |
| 1951 | 119.8 mm (4.7 in) |
| 1952 | 117.5 mm (4.6 in) |
| 1953 | 61.9 mm (2.4 in) |
| 1954 | 72.1 mm (2.8 in) |
| 1955 | 209.6 mm (8.3 in) |
| 1956 | 94.0 mm (3.7 in) |
| 1957 | 87.9 mm (3.5 in) |
| 1958 | 116.2 mm (4.6 in) |
| 1959 | 69.1 mm (2.7 in) |
| 1960 | 84.1 mm (3.3 in) |
| 1961 | 71.9 mm (2.8 in) |
| 1962 | 141.0 mm (5.6 in) |
| 1963 | 174.0 mm (6.9 in) |
| 1964 | 164.7 mm (6.5 in) |
| 1965 | 77.2 mm (3.0 in) |
| 1966 | 99.6 mm (3.9 in) |
| 1967 | 169.4 mm (6.7 in) |
| 1968 | 62.8 mm (2.5 in) |
| 1969 | 184.3 mm (7.3 in) |
| 1970 | 111.0 mm (4.4 in) |
| 1971 | 105.9 mm (4.2 in) |
| 1972 | 57.2 mm (2.3 in) |
| 1973 | 74.9 mm (2.9 in) |
| 1974 | 68.6 mm (2.7 in) |
| 1975 | 84.0 mm (3.3 in) |
| 1976 | 58.5 mm (2.3 in) |
| 1977 | 78.6 mm (3.1 in) |
| 1978 | 82.7 mm (3.3 in) |
| 1979 | 87.9 mm (3.5 in) |
| 1980 | 151.2 mm (6.0 in) |
| 1981 | 115.0 mm (4.5 in) |
| 1982 | 120.9 mm (4.8 in) |
| 1983 | 97.8 mm (3.9 in) |
| 1984 | 68.6 mm (2.7 in) |
| 1985 | 63.0 mm (2.5 in) |
| 1986 | 310.6 mm (12.2 in) |
| 1987 | 54.6 mm (2.1 in) |
| 1988 | 93.5 mm (3.7 in) |
| 1989 | 66.3 mm (2.6 in) |
| 1990 | 68.6 mm (2.7 in) |
| 1991 | 82.5 mm (3.2 in) |
| 1992 | 115.6 mm (4.6 in) |
| 1993 | 115.8 mm (4.6 in) |
| 1994 | 56.6 mm (2.2 in) |
| 1995 | 117.2 mm (4.6 in) |
| 1996 | 139.2 mm (5.5 in) |
| 1997 | 181.0 mm (7.1 in) |
| 1999 | 22.6 mm (0.9 in) |
| 2000 | 74.2 mm (2.9 in) |
| 2001 | 82.3 mm (3.2 in) |
| 2002 | 106.4 mm (4.2 in) |
| 2003 | 55.7 mm (2.2 in) |
| 2004 | 80.8 mm (3.2 in) |
| 2005 | 133.7 mm (5.3 in) |
| 2006 | 158.2 mm (6.2 in) |
| 2007 | 68.6 mm (2.7 in) |
| 2008 | 110.5 mm (4.4 in) |
| 2009 | 78.0 mm (3.1 in) |
| 2010 | 87.9 mm (3.5 in) |
| 2011 | 97.0 mm (3.8 in) |
| 2012 | 129.5 mm (5.1 in) |
| 2013 | 40.2 mm (1.6 in) |
| 2014 | 107.2 mm (4.2 in) |
| 2015 | 96.7 mm (3.8 in) |
| 2016 | 85.1 mm (3.4 in) |
| 2017 | 184.6 mm (7.3 in) |
| 2018 | 85.3 mm (3.4 in) |
| 2019 | 135.6 mm (5.3 in) |
| 2020 | 78.9 mm (3.1 in) |
| 2021 | 161.8 mm (6.4 in) |
| 2022 | 100.1 mm (3.9 in) |
| 2023 | 132.3 mm (5.2 in) |
| 2024 | 124.7 mm (4.9 in) |
| 2025 | 186.1 mm (7.3 in) |
| 2026 | 87.5 mm (3.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1906 | 62 days |
| 1907 | 133 days |
| 1908 | 74 days |
| 1909 | 133 days |
| 1910 | 99 days |
| 1911 | 104 days |
| 1912 | 70 days |
| 1913 | 40 days |
| 1914 | 31 days |
| 1915 | 19 days |
| 1916 | 24 days |
| 1917 | 24 days |
| 1918 | 17 days |
| 1936 | 14 days |
| 1937 | 63 days |
| 1938 | 32 days |
| 1939 | 40 days |
| 1940 | 36 days |
| 1941 | 33 days |
| 1942 | 51 days |
| 1943 | 98 days |
| 1944 | 35 days |
| 1945 | 42 days |
| 1946 | 46 days |
| 1947 | 66 days |
| 1948 | 62 days |
| 1949 | 52 days |
| 1950 | 86 days |
| 1951 | 61 days |
| 1952 | 46 days |
| 1953 | 73 days |
| 1954 | 90 days |
| 1955 | 64 days |
| 1956 | 59 days |
| 1957 | 67 days |
| 1958 | 35 days |
| 1959 | 84 days |
| 1960 | 108 days |
| 1961 | 31 days |
| 1962 | 35 days |
| 1963 | 25 days |
| 1964 | 57 days |
| 1965 | 36 days |
| 1966 | 49 days |
| 1967 | 41 days |
| 1968 | 53 days |
| 1969 | 55 days |
| 1970 | 61 days |
| 1971 | 36 days |
| 1972 | 68 days |
| 1973 | 41 days |
| 1974 | 75 days |
| 1975 | 53 days |
| 1976 | 63 days |
| 1977 | 53 days |
| 1978 | 48 days |
| 1979 | 72 days |
| 1980 | 29 days |
| 1981 | 106 days |
| 1982 | 37 days |
| 1983 | 58 days |
| 1984 | 38 days |
| 1985 | 45 days |
| 1986 | 61 days |
| 1987 | 117 days |
| 1988 | 43 days |
| 1989 | 59 days |
| 1990 | 37 days |
| 1991 | 33 days |
| 1992 | 37 days |
| 1993 | 90 days |
| 1994 | 116 days |
| 1995 | 117 days |
| 1996 | 43 days |
| 1997 | 34 days |
| 1999 | 63 days |
| 2000 | 47 days |
| 2001 | 35 days |
| 2002 | 110 days |
| 2003 | 56 days |
| 2004 | 102 days |
| 2005 | 41 days |
| 2006 | 84 days |
| 2007 | 83 days |
| 2008 | 82 days |
| 2009 | 67 days |
| 2010 | 31 days |
| 2011 | 41 days |
| 2012 | 46 days |
| 2013 | 48 days |
| 2014 | 58 days |
| 2015 | 53 days |
| 2016 | 71 days |
| 2017 | 55 days |
| 2018 | 71 days |
| 2019 | 88 days |
| 2020 | 75 days |
| 2021 | 26 days |
| 2022 | 66 days |
| 2023 | 50 days |
| 2024 | 90 days |
| 2025 | 35 days |
| 2026 | 45 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
78 years with a frostAcross 78 years with a frost, the median last spring frost at Boca falls on 28 June and the median first autumn frost on 5 July, which leaves a median of 9 days between them.
In 1988 to 2025 the median growing season was 14 days. That is 10 days more than in 1937 to 1969.
Fitted over all years, the growing season changes by +2.5 days per decade at this station.
| Measure | Median, all years | Earliest period (1937 to 1969) | Recent period (1988 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 June | 29 June | 26 June | 3 days earlier | -0.5 days per decade |
| First autumn frost | 5 July | 2 July | 6 July | 4 days later | +2.0 days per decade |
| Growing days | 9 days | 4 days | 14 days | 10 days more | +2.5 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
86 years, 1907 to 2025A day with at least 50.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 119.5 mm (4.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 50.0 mm (2.0 in) | |
| 5 years | 66.2 mm (2.6 in) | |
| 10 years | 77.9 mm (3.1 in) | |
| 25 years | 93.7 mm (3.7 in) | |
| 50 years | 106.2 mm (4.2 in) | |
| 100 years | 119.5 mm (4.7 in) | Longer than the 86 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, 86 years of values from 1907 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: 152.4 mm (6.0 in) in 1907; 121.9 mm (4.8 in) in 1911; 119.9 mm (4.7 in) in 2021.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Boca had a mean temperature of 7.3 C (45.1 F) and 626.6 mm (24.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Flagstaff AP (United States, 882 km away), Rimrock Tieton Dam (United States, 812 km away) and Bayview Model Basin (United States, 996 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Flagstaff AP | United States | 882 km (548 mi) | 7.6 C (45.8 F) | 579.6 mm (22.8 in) | 0.73 |
| Rimrock Tieton Dam | United States | 812 km (505 mi) | 6.8 C (44.2 F) | 632.5 mm (24.9 in) | 0.78 |
| Bayview Model Basin | United States | 996 km (619 mi) | 7.1 C (44.8 F) | 635.6 mm (25.0 in) | 0.80 |
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).