Deer Valley Weather Records (USC00022462)
Record envelope, standing records and threshold days for Deer Valley (USC00022462), Arizona, United States, with 36 years of record.
Key Facts for Deer Valley
- Deer Valley (USC00022462) is a weather station in Arizona, United States at 33.58 latitude and -112.08 longitude, 383 m (1,257 ft) above sea level.
- The station reports from 1950 to 1985, 36 years of record.
- 1,464 records set at Deer Valley still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Deer Valley set a daily record low maximum temperature of 8.3 C (46.9 F) on 31 January 1985.
About the Station
- Location: Arizona, United States, 33.58 latitude, -112.08 longitude.
- Elevation: 383 m (1,257 ft).
- Period of record: 1950 to 1985, 36 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 31.7 C (89.1 F) | -7.2 C (19.0 F) | n/a | n/a |
| Feb | 32.8 C (91.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Mar | 35.6 C (96.1 F) | -3.9 C (25.0 F) | n/a | n/a |
| Apr | 39.4 C (102.9 F) | -0.6 C (30.9 F) | n/a | n/a |
| May | 44.4 C (111.9 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jun | 46.7 C (116.1 F) | 6.7 C (44.1 F) | n/a | n/a |
| Jul | 47.8 C (118.0 F) | 15.6 C (60.1 F) | n/a | n/a |
| Aug | 46.7 C (116.1 F) | 11.7 C (53.1 F) | n/a | n/a |
| Sep | 44.4 C (111.9 F) | 8.3 C (46.9 F) | n/a | n/a |
| Oct | 41.1 C (106.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| Nov | 34.4 C (93.9 F) | -3.3 C (26.1 F) | n/a | n/a |
| Dec | 30.6 C (87.1 F) | -6.1 C (21.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1950 | 73 |
| 1951 | 52 |
| 1952 | 40 |
| 1953 | 30 |
| 1954 | 16 |
| 1955 | 60 |
| 1956 | 47 |
| 1957 | 49 |
| 1958 | 40 |
| 1959 | 24 |
| 1960 | 50 |
| 1961 | 26 |
| 1962 | 71 |
| 1963 | 55 |
| 1964 | 32 |
| 1965 | 52 |
| 1966 | 38 |
| 1967 | 35 |
| 1968 | 27 |
| 1969 | 60 |
| 1970 | 35 |
| 1971 | 51 |
| 1972 | 55 |
| 1973 | 29 |
| 1974 | 25 |
| 1975 | 28 |
| 1976 | 41 |
| 1977 | 42 |
| 1978 | 41 |
| 1979 | 41 |
| 1980 | 66 |
| 1981 | 31 |
| 1982 | 34 |
| 1983 | 27 |
| 1984 | 36 |
| 1985 | 5 |
Wettest Day of Each Month
Aug: 57.2 mm (2.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 39.6 mm (1.6 in) | 30 January 1951 |
| Feb | 27.2 mm (1.1 in) | 7 February 1965 |
| Mar | 56.6 mm (2.2 in) | 1 March 1978 |
| Apr | 28.7 mm (1.1 in) | 4 April 1965 |
| May | 31.0 mm (1.2 in) | 31 May 1973 |
| Jun | 27.4 mm (1.1 in) | 18 June 1967 |
| Jul | 43.2 mm (1.7 in) | 28 July 1951 |
| Aug | 57.2 mm (2.3 in) | 19 August 1966 |
| Sep | 54.4 mm (2.1 in) | 6 September 1970 |
| Oct | 49.5 mm (1.9 in) | 18 October 1963 |
| Nov | 23.9 mm (0.9 in) | 11 November 1978 |
| Dec | 43.2 mm (1.7 in) | 15 December 1967 |
Period of Record Coverage
1950 to 1985| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1950 | 347 | 95% | Yes |
| 1951 | 344 | 94% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 182 | 50% | No |
| 1954 | 156 | 43% | No |
| 1955 | 330 | 90% | Yes |
| 1956 | 345 | 94% | Yes |
| 1957 | 361 | 99% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 335 | 92% | Yes |
| 1960 | 349 | 95% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 362 | 99% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 358 | 98% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 259 | 71% | No |
| 1971 | 365 | 100% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 360 | 99% | Yes |
| 1983 | 360 | 99% | Yes |
| 1984 | 333 | 91% | Yes |
| 1985 | 30 | 8% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 31 January 1985 | Deer Valley, US | daily low max | 8.3 C (46.9 F) | 3.4 C (6.1 F) | 34 years | 21 of 100 (Routine) |
| 26 January 1985 | Deer Valley, US | daily rain | 13.0 mm (0.5 in) | 9.7 mm (0.38 in) | 23 years | 20 of 100 (Routine) |
| 26 January 1985 | Deer Valley, US | daily high min | 10.6 C (51.1 F) | 1.2 C (2.2 F) | 16 years | 10 of 100 (Routine) |
| 25 January 1985 | Deer Valley, US | daily high min (Tie) | 11.1 C (52.0 F) | tie | 16 years | 1 of 100 (Routine) |
| 24 January 1985 | Deer Valley, US | daily high min | 10.0 C (50.0 F) | 1.1 C (2.0 F) | 35 years | 15 of 100 (Routine) |
| 23 January 1985 | Deer Valley, US | daily high min | 11.1 C (52.0 F) | 2.2 C (4.0 F) | 18 years | 13 of 100 (Routine) |
| 4 January 1985 | Deer Valley, US | daily high min | 8.9 C (48.0 F) | 1.1 C (2.0 F) | 28 years | 13 of 100 (Routine) |
| 28 December 1984 | Deer Valley, US | daily high min | 11.1 C (52.0 F) | 1.1 C (2.0 F) | 7 years | 8 of 100 (Routine) |
| 27 December 1984 | Deer Valley, US | daily rain | 30.0 mm (1.2 in) | 17.6 mm (0.7 in) | 12 years | 25 of 100 (Routine) |
| 27 December 1984 | Deer Valley, US | daily high min (Tie) | 11.7 C (53.1 F) | tie | 7 years | 1 of 100 (Routine) |
| 20 December 1984 | Deer Valley, US | daily high min (Tie) | 9.4 C (48.9 F) | tie | 7 years | 1 of 100 (Routine) |
| 12 December 1984 | Deer Valley, US | daily rain | 7.6 mm (0.30 in) | 5.8 mm (0.23 in) | 33 years | 18 of 100 (Routine) |
| 12 December 1984 | Deer Valley, US | daily high min | 9.4 C (48.9 F) | 0.5 C (0.9 F) | 22 years | 10 of 100 (Routine) |
| 8 December 1984 | Deer Valley, US | daily high min | 12.2 C (54.0 F) | 1.6 C (2.9 F) | 19 years | 12 of 100 (Routine) |
| 5 December 1984 | Deer Valley, US | daily rain | 10.7 mm (0.4 in) | 1.3 mm (0.05 in) | 12 years | 7 of 100 (Routine) |
| 4 December 1984 | Deer Valley, US | daily rain | 24.6 mm (1.0 in) | 10.4 mm (0.4 in) | 10 years | 17 of 100 (Routine) |
| 4 December 1984 | Deer Valley, US | daily low max | 11.1 C (52.0 F) | 3.3 C (5.9 F) | 13 years | 14 of 100 (Routine) |
| 3 December 1984 | Deer Valley, US | daily rain | 5.3 mm (0.21 in) | 4.5 mm (0.18 in) | 15 years | 12 of 100 (Routine) |
| 27 November 1984 | Deer Valley, US | daily low max | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 3 years | 4 of 100 (Routine) |
| 25 November 1984 | Deer Valley, US | daily rain | 11.4 mm (0.4 in) | 8.1 mm (0.32 in) | 19 years | 20 of 100 (Routine) |
Climate Trend
25 complete years, 1952 to 1983| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1952 | 19.8 C | -1.28 C |
| 1957 | 20.3 C | -0.74 C |
| 1958 | 21.2 C | +0.17 C |
| 1961 | 20.6 C | -0.44 C |
| 1962 | 21.1 C | +0.06 C |
| 1963 | 21.6 C | +0.51 C |
| 1964 | 20.5 C | -0.54 C |
| 1965 | 20.7 C | -0.33 C |
| 1966 | 21.4 C | +0.37 C |
| 1967 | 21.3 C | +0.19 C |
| 1968 | 21.4 C | +0.29 C |
| 1969 | 22.2 C | +1.10 C |
| 1971 | 20.5 C | -0.62 C |
| 1972 | 21.2 C | +0.13 C |
| 1973 | 20.8 C | -0.27 C |
| 1974 | 21.3 C | +0.24 C |
| 1975 | 20.4 C | -0.70 C |
| 1976 | 21.2 C | +0.10 C |
| 1977 | 21.7 C | +0.67 C |
| 1978 | 21.3 C | +0.25 C |
| 1979 | 20.7 C | -0.33 C |
| 1980 | 21.6 C | +0.53 C |
| 1981 | 22.3 C | +1.21 C |
| 1982 | 20.6 C | -0.46 C |
| 1983 | 20.9 C | -0.18 C |
This station does not have enough complete years (30 are needed) to fit a temperature trend.
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1950 to 1985| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 47.8 C (118.0 F) | 1958 | 45.0 C (113.0 F) | 36 |
| Coldest night (TNn) | -7.2 C (19.0 F) | 1971 | -3.9 C (25.0 F) | 36 |
| Wettest day (Rx1day) | 57.2 mm (2.3 in) | 1966 | 30.8 mm (1.2 in) | 36 |
| Wettest five days (Rx5day) | 102.3 mm (4.0 in) | 1978 | 43.5 mm (1.7 in) | 36 |
| Longest dry spell (CDD) | 158 days | 1972 | 85 days | 36 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1950 | 46.7 C (116.1 F) |
| 1951 | 43.9 C (111.0 F) |
| 1952 | 43.9 C (111.0 F) |
| 1953 | 33.9 C (93.0 F) |
| 1954 | 36.1 C (97.0 F) |
| 1955 | 46.1 C (115.0 F) |
| 1956 | 45.0 C (113.0 F) |
| 1957 | 44.4 C (111.9 F) |
| 1958 | 47.8 C (118.0 F) |
| 1959 | 44.4 C (111.9 F) |
| 1960 | 45.6 C (114.1 F) |
| 1961 | 44.4 C (111.9 F) |
| 1962 | 46.1 C (115.0 F) |
| 1963 | 43.9 C (111.0 F) |
| 1964 | 44.4 C (111.9 F) |
| 1965 | 44.4 C (111.9 F) |
| 1966 | 45.0 C (113.0 F) |
| 1967 | 45.6 C (114.1 F) |
| 1968 | 46.1 C (115.0 F) |
| 1969 | 47.2 C (117.0 F) |
| 1970 | 46.1 C (115.0 F) |
| 1971 | 45.0 C (113.0 F) |
| 1972 | 46.1 C (115.0 F) |
| 1973 | 46.1 C (115.0 F) |
| 1974 | 46.7 C (116.1 F) |
| 1975 | 45.6 C (114.1 F) |
| 1976 | 45.0 C (113.0 F) |
| 1977 | 44.4 C (111.9 F) |
| 1978 | 46.1 C (115.0 F) |
| 1979 | 46.7 C (116.1 F) |
| 1980 | 46.1 C (115.0 F) |
| 1981 | 44.4 C (111.9 F) |
| 1982 | 44.4 C (111.9 F) |
| 1983 | 45.0 C (113.0 F) |
| 1984 | 44.4 C (111.9 F) |
| 1985 | 22.8 C (73.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1950 | -2.2 C (28.0 F) |
| 1951 | -5.0 C (23.0 F) |
| 1952 | -4.4 C (24.1 F) |
| 1953 | -6.1 C (21.0 F) |
| 1954 | -5.6 C (21.9 F) |
| 1955 | -6.7 C (19.9 F) |
| 1956 | -5.6 C (21.9 F) |
| 1957 | -1.7 C (28.9 F) |
| 1958 | -3.9 C (25.0 F) |
| 1959 | -2.2 C (28.0 F) |
| 1960 | -6.1 C (21.0 F) |
| 1961 | -2.2 C (28.0 F) |
| 1962 | -6.1 C (21.0 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -6.1 C (21.0 F) |
| 1965 | -2.2 C (28.0 F) |
| 1966 | -5.0 C (23.0 F) |
| 1967 | -3.9 C (25.0 F) |
| 1968 | -3.9 C (25.0 F) |
| 1969 | -1.7 C (28.9 F) |
| 1970 | -3.3 C (26.1 F) |
| 1971 | -7.2 C (19.0 F) |
| 1972 | -3.9 C (25.0 F) |
| 1973 | -2.2 C (28.0 F) |
| 1974 | -4.4 C (24.1 F) |
| 1975 | -2.8 C (27.0 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -3.3 C (26.1 F) |
| 1978 | -5.0 C (23.0 F) |
| 1979 | -5.0 C (23.0 F) |
| 1980 | 0.0 C (32.0 F) |
| 1981 | -0.6 C (30.9 F) |
| 1982 | -1.1 C (30.0 F) |
| 1983 | -1.7 C (28.9 F) |
| 1984 | -2.2 C (28.0 F) |
| 1985 | 0.0 C (32.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1950 | 19.3 mm (0.8 in) |
| 1951 | 43.2 mm (1.7 in) |
| 1952 | 23.9 mm (0.9 in) |
| 1953 | 13.7 mm (0.5 in) |
| 1954 | 19.1 mm (0.8 in) |
| 1955 | 26.2 mm (1.0 in) |
| 1956 | 30.5 mm (1.2 in) |
| 1957 | 31.8 mm (1.3 in) |
| 1958 | 16.3 mm (0.6 in) |
| 1959 | 28.4 mm (1.1 in) |
| 1960 | 23.6 mm (0.9 in) |
| 1961 | 32.5 mm (1.3 in) |
| 1962 | 16.0 mm (0.6 in) |
| 1963 | 49.5 mm (1.9 in) |
| 1964 | 32.8 mm (1.3 in) |
| 1965 | 34.0 mm (1.3 in) |
| 1966 | 57.2 mm (2.3 in) |
| 1967 | 43.2 mm (1.7 in) |
| 1968 | 27.4 mm (1.1 in) |
| 1969 | 28.4 mm (1.1 in) |
| 1970 | 54.4 mm (2.1 in) |
| 1971 | 32.8 mm (1.3 in) |
| 1972 | 45.2 mm (1.8 in) |
| 1973 | 31.0 mm (1.2 in) |
| 1974 | 54.6 mm (2.1 in) |
| 1975 | 17.0 mm (0.7 in) |
| 1976 | 26.7 mm (1.1 in) |
| 1977 | 17.0 mm (0.7 in) |
| 1978 | 56.6 mm (2.2 in) |
| 1979 | 31.5 mm (1.2 in) |
| 1980 | 17.3 mm (0.7 in) |
| 1981 | 18.0 mm (0.7 in) |
| 1982 | 45.5 mm (1.8 in) |
| 1983 | 49.3 mm (1.9 in) |
| 1984 | 34.8 mm (1.4 in) |
| 1985 | 13.0 mm (0.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1950 | 25.1 mm (1.0 in) |
| 1951 | 98.5 mm (3.9 in) |
| 1952 | 29.5 mm (1.2 in) |
| 1953 | 25.1 mm (1.0 in) |
| 1954 | 31.0 mm (1.2 in) |
| 1955 | 39.3 mm (1.5 in) |
| 1956 | 59.2 mm (2.3 in) |
| 1957 | 46.1 mm (1.8 in) |
| 1958 | 31.3 mm (1.2 in) |
| 1959 | 46.7 mm (1.8 in) |
| 1960 | 23.6 mm (0.9 in) |
| 1961 | 32.5 mm (1.3 in) |
| 1962 | 30.5 mm (1.2 in) |
| 1963 | 49.6 mm (2.0 in) |
| 1964 | 46.8 mm (1.8 in) |
| 1965 | 49.8 mm (2.0 in) |
| 1966 | 65.8 mm (2.6 in) |
| 1967 | 89.7 mm (3.5 in) |
| 1968 | 33.7 mm (1.3 in) |
| 1969 | 41.4 mm (1.6 in) |
| 1970 | 62.8 mm (2.5 in) |
| 1971 | 33.6 mm (1.3 in) |
| 1972 | 61.5 mm (2.4 in) |
| 1973 | 31.0 mm (1.2 in) |
| 1974 | 55.9 mm (2.2 in) |
| 1975 | 21.4 mm (0.8 in) |
| 1976 | 29.5 mm (1.2 in) |
| 1977 | 19.8 mm (0.8 in) |
| 1978 | 102.3 mm (4.0 in) |
| 1979 | 55.9 mm (2.2 in) |
| 1980 | 45.6 mm (1.8 in) |
| 1981 | 27.4 mm (1.1 in) |
| 1982 | 49.1 mm (1.9 in) |
| 1983 | 65.3 mm (2.6 in) |
| 1984 | 58.1 mm (2.3 in) |
| 1985 | 18.4 mm (0.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1950 | 120 days |
| 1951 | 70 days |
| 1952 | 67 days |
| 1953 | 90 days |
| 1954 | 108 days |
| 1955 | 107 days |
| 1956 | 155 days |
| 1957 | 55 days |
| 1958 | 78 days |
| 1959 | 87 days |
| 1960 | 81 days |
| 1961 | 94 days |
| 1962 | 98 days |
| 1963 | 102 days |
| 1964 | 76 days |
| 1965 | 57 days |
| 1966 | 120 days |
| 1967 | 66 days |
| 1968 | 116 days |
| 1969 | 80 days |
| 1970 | 131 days |
| 1971 | 70 days |
| 1972 | 158 days |
| 1973 | 129 days |
| 1974 | 108 days |
| 1975 | 88 days |
| 1976 | 63 days |
| 1977 | 79 days |
| 1978 | 82 days |
| 1979 | 57 days |
| 1980 | 78 days |
| 1981 | 55 days |
| 1982 | 57 days |
| 1983 | 98 days |
| 1984 | 96 days |
| 1985 | 16 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
22 years with a frostAcross 22 years with a frost, the median last spring frost at Deer Valley falls on 6 February and the median first autumn frost on 30 November, which leaves a median of 293 days between them.
| Measure | Median, all years | Earliest period | Recent period (1952 to 1983) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 February | n/a | 6 February | n/a | n/a |
| First autumn frost | 30 November | n/a | 30 November | n/a | n/a |
| Growing days | 293 days | n/a | 293 days | n/a | n/a |
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
33 years, 1950 to 1984A day with at least 30.3 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 71.0 mm (2.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 30.3 mm (1.2 in) | |
| 5 years | 41.8 mm (1.6 in) | |
| 10 years | 49.2 mm (1.9 in) | |
| 25 years | 58.2 mm (2.3 in) | |
| 50 years | 64.7 mm (2.5 in) | Longer than the 33 years of record |
| 100 years | 71.0 mm (2.8 in) | Longer than the 33 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, 33 years of values from 1950 to 1984.
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: 57.2 mm (2.3 in) in 1966; 56.6 mm (2.2 in) in 1978; 54.6 mm (2.1 in) in 1974.
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).