Palmdale AP Weather Records (USW00023182)
Record envelope, standing records and threshold days for Palmdale AP (USW00023182), California, United States, with 93 years of record.
Key Facts for Palmdale AP
- Palmdale AP (USW00023182) is a weather station in California, United States at 34.63 latitude and -118.08 longitude, 765 m (2,509 ft) above sea level.
- The station reports from 1934 to 2026, 93 years of record.
- 1,464 records set at Palmdale AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Palmdale AP tied a daily record low maximum temperature of 16.1 C (61.0 F) 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, 34.63 latitude, -118.08 longitude.
- Elevation: 765 m (2,509 ft).
- Period of record: 1934 to 2026, 93 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
17 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 29.4 C (84.9 F) | -16.1 C (3.0 F) | 20.6 C (69.1 F) | -3.9 C (25.0 F) |
| Feb | 28.9 C (84.0 F) | -11.7 C (10.9 F) | 27.8 C (82.0 F) | -2.8 C (27.0 F) |
| Mar | 35.0 C (95.0 F) | -8.9 C (16.0 F) | 35.0 C (95.0 F) | -2.2 C (28.0 F) |
| Apr | 35.6 C (96.1 F) | -3.3 C (26.1 F) | 30.0 C (86.0 F) | 1.1 C (34.0 F) |
| May | 41.1 C (106.0 F) | -1.1 C (30.0 F) | 37.2 C (99.0 F) | 7.2 C (45.0 F) |
| Jun | 45.0 C (113.0 F) | 2.8 C (37.0 F) | 37.8 C (100.0 F) | 12.2 C (54.0 F) |
| Jul | 46.1 C (115.0 F) | 6.7 C (44.1 F) | 41.1 C (106.0 F) | 13.3 C (55.9 F) |
| Aug | 43.9 C (111.0 F) | 6.7 C (44.1 F) | 41.7 C (107.1 F) | 15.0 C (59.0 F) |
| Sep | 43.9 C (111.0 F) | 0.0 C (32.0 F) | 38.9 C (102.0 F) | 10.0 C (50.0 F) |
| Oct | 40.6 C (105.1 F) | -7.8 C (18.0 F) | 35.6 C (96.1 F) | 10.0 C (50.0 F) |
| Nov | 30.6 C (87.1 F) | -15.6 C (3.9 F) | n/a | n/a |
| Dec | 29.4 C (84.9 F) | -14.4 C (6.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1934 | 28 |
| 1935 | 33 |
| 1936 | 21 |
| 1937 | 33 |
| 1938 | 33 |
| 1939 | 29 |
| 1940 | 25 |
| 1941 | 34 |
| 1948 | 18 |
| 1949 | 49 |
| 1950 | 40 |
| 1951 | 20 |
| 1952 | 24 |
| 1953 | 36 |
| 1954 | 23 |
| 1955 | 37 |
| 1956 | 18 |
| 1957 | 24 |
| 1958 | 15 |
| 1959 | 14 |
| 1960 | 21 |
| 1961 | 11 |
| 1962 | 22 |
| 1963 | 24 |
| 1964 | 34 |
| 1965 | 23 |
| 1966 | 16 |
| 1967 | 22 |
| 1968 | 17 |
| 1969 | 16 |
| 1970 | 17 |
| 1971 | 33 |
| 1972 | 27 |
| 1973 | 16 |
| 1974 | 6 |
| 1998 | 19 |
| 1999 | 11 |
| 2000 | 12 |
| 2001 | 21 |
| 2002 | 15 |
| 2003 | 21 |
| 2004 | 16 |
| 2005 | 6 |
| 2006 | 19 |
| 2007 | 20 |
| 2008 | 17 |
| 2009 | 18 |
| 2010 | 22 |
| 2011 | 19 |
| 2012 | 27 |
| 2013 | 20 |
| 2014 | 27 |
| 2015 | 24 |
| 2016 | 14 |
| 2017 | 25 |
| 2018 | 25 |
| 2019 | 25 |
| 2020 | 28 |
| 2021 | 30 |
| 2022 | 26 |
| 2023 | 18 |
| 2024 | 34 |
| 2025 | 20 |
| 2026 | 26 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 2001-07-04 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 2003-02-12 | Record daily precipitation | Record daily precipitation 70.9 mm (2.8 in) |
| 2003-07-18 | Record high minimum temperature | Record high minimum temperature 27.2 C (81.0 F) |
| 2012-07-12 | Record high minimum temperature | Record high minimum temperature 27.8 C (82.0 F) |
| 2023-08-20 | Record daily precipitation | Record daily precipitation 99.8 mm (3.9 in) |
| 2024-07-06 | Record high maximum temperature | Record high maximum temperature 46.1 C (115.0 F) |
Wettest Day of Each Month
Aug: 99.8 mm (3.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 39.1 mm (1.5 in) | 12 January 1957 |
| Feb | 70.9 mm (2.8 in) | 12 February 2003 |
| Mar | 37.8 mm (1.5 in) | 12 March 2020 |
| Apr | 23.1 mm (0.9 in) | 12 April 1956 |
| May | 24.4 mm (1.0 in) | 22 May 2014 |
| Jun | 7.6 mm (0.30 in) | 22 June 2022 |
| Jul | 16.5 mm (0.6 in) | 29 July 2015 |
| Aug | 99.8 mm (3.9 in) | 20 August 2023 |
| Sep | 21.6 mm (0.9 in) | 10 September 2011 |
| Oct | 54.4 mm (2.1 in) | 17 October 2005 |
| Nov | 64.0 mm (2.5 in) | 22 November 1965 |
| Dec | 53.3 mm (2.1 in) | 28 December 2004 |
Period of Record Coverage
1934 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1934 | 364 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 363 | 99% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1948 | 183 | 50% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 362 | 99% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 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 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 90 | 25% | No |
| 1998 | 262 | 72% | No |
| 1999 | 358 | 98% | Yes |
| 2000 | 362 | 99% | Yes |
| 2001 | 359 | 98% | Yes |
| 2002 | 358 | 98% | Yes |
| 2003 | 359 | 98% | Yes |
| 2004 | 362 | 99% | Yes |
| 2005 | 363 | 99% | Yes |
| 2006 | 356 | 98% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 363 | 99% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 364 | 99% | 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 | 364 | 100% | Yes |
| 2020 | 365 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 12 October 2026 | Palmdale AP, US | daily low max (Tie, Provisional) | 16.1 C (61.0 F) | tie | 17 years | 3 of 100 (Routine) |
| 10 October 2026 | Palmdale AP, US | daily high min (Provisional) | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 24 years | 18 of 100 (Routine) |
| 9 October 2026 | Palmdale AP, US | daily high min (Provisional) | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 12 years | 14 of 100 (Routine) |
| 8 October 2026 | Palmdale AP, US | daily high max (Provisional) | 35.6 C (96.1 F) | 0.6 C (1.1 F) | 60 years | 28 of 100 (Routine) |
| 8 October 2026 | Palmdale AP, US | daily high min (Provisional) | 17.2 C (63.0 F) | 1.6 C (2.9 F) | 12 years | 15 of 100 (Routine) |
| 27 September 2026 | Palmdale AP, US | daily high min (Provisional) | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 4 years | 12 of 100 (Routine) |
| 11 September 2026 | Palmdale AP, US | daily high min (Provisional) | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 11 years | 14 of 100 (Routine) |
| 10 September 2026 | Palmdale AP, US | daily high min (Provisional) | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 13 years | 14 of 100 (Routine) |
| 6 September 2026 | Palmdale AP, US | daily low max (Provisional) | 21.7 C (71.1 F) | 2.2 C (4.0 F) | 60 years | 31 of 100 (Routine) |
| 21 August 2026 | Palmdale AP, US | daily high min (Tie, Provisional) | 23.9 C (75.0 F) | tie | 13 years | 3 of 100 (Routine) |
| 10 August 2026 | Palmdale AP, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 8 years | 12 of 100 (Routine) |
| 6 August 2026 | Palmdale AP, US | daily high min | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 61 years | 28 of 100 (Routine) |
| 13 June 2026 | Palmdale AP, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 7 years | 2 of 100 (Routine) |
| 12 May 2026 | Palmdale AP, US | daily high max (Tie) | 36.1 C (97.0 F) | tie | 12 years | 3 of 100 (Routine) |
| 11 May 2026 | Palmdale AP, US | daily high max | 37.2 C (99.0 F) | 1.1 C (2.0 F) | 85 years | 35 of 100 (Notable) |
| 9 April 2026 | Palmdale AP, US | daily high min (Tie) | 15.0 C (59.0 F) | tie | 4 years | 2 of 100 (Routine) |
| 6 April 2026 | Palmdale AP, US | daily high min (Tie) | 13.3 C (55.9 F) | tie | 65 years | 7 of 100 (Routine) |
| 30 March 2026 | Palmdale AP, US | daily high min | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 12 years | 13 of 100 (Routine) |
| 29 March 2026 | Palmdale AP, US | daily high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 11 years | 12 of 100 (Routine) |
| 28 March 2026 | Palmdale AP, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 11 years | 13 of 100 (Routine) |
Climate Trend
60 complete years, 1934 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1934 | 17.0 C | +0.53 C |
| 1935 | 15.1 C | -1.39 C |
| 1936 | 16.4 C | -0.07 C |
| 1937 | 15.5 C | -1.00 C |
| 1938 | 15.5 C | -1.04 C |
| 1939 | 16.4 C | -0.07 C |
| 1940 | 17.0 C | +0.49 C |
| 1941 | 14.6 C | -1.89 C |
| 1949 | 15.2 C | -1.34 C |
| 1950 | 16.8 C | +0.29 C |
| 1951 | 16.0 C | -0.46 C |
| 1952 | 15.1 C | -1.39 C |
| 1953 | 15.2 C | -1.32 C |
| 1954 | 16.0 C | -0.52 C |
| 1955 | 15.1 C | -1.39 C |
| 1956 | 15.5 C | -0.99 C |
| 1957 | 15.5 C | -0.97 C |
| 1958 | 16.5 C | +0.02 C |
| 1959 | 17.2 C | +0.65 C |
| 1960 | 16.9 C | +0.36 C |
| 1961 | 16.3 C | -0.18 C |
| 1962 | 15.8 C | -0.73 C |
| 1963 | 15.8 C | -0.75 C |
| 1964 | 15.5 C | -1.01 C |
| 1965 | 15.5 C | -0.97 C |
| 1966 | 16.0 C | -0.50 C |
| 1967 | 16.0 C | -0.51 C |
| 1968 | 16.0 C | -0.50 C |
| 1969 | 16.0 C | -0.52 C |
| 1970 | 16.0 C | -0.47 C |
| 1971 | 15.0 C | -1.47 C |
| 1972 | 15.8 C | -0.68 C |
| 1973 | 15.5 C | -0.99 C |
| 1999 | 16.4 C | -0.14 C |
| 2000 | 16.7 C | +0.15 C |
| 2001 | 17.4 C | +0.86 C |
| 2002 | 17.0 C | +0.46 C |
| 2003 | 17.4 C | +0.94 C |
| 2004 | 16.7 C | +0.23 C |
| 2005 | 16.3 C | -0.17 C |
| 2006 | 16.6 C | +0.13 C |
| 2007 | 17.4 C | +0.85 C |
| 2008 | 17.2 C | +0.66 C |
| 2009 | 17.0 C | +0.54 C |
| 2010 | 16.4 C | -0.06 C |
| 2011 | 16.2 C | -0.31 C |
| 2012 | 17.8 C | +1.26 C |
| 2013 | 17.3 C | +0.79 C |
| 2014 | 18.4 C | +1.94 C |
| 2015 | 17.6 C | +1.11 C |
| 2016 | 17.8 C | +1.27 C |
| 2017 | 18.3 C | +1.78 C |
| 2018 | 18.2 C | +1.66 C |
| 2019 | 16.5 C | +0.02 C |
| 2020 | 17.7 C | +1.21 C |
| 2021 | 18.0 C | +1.52 C |
| 2022 | 17.8 C | +1.34 C |
| 2023 | 16.2 C | -0.28 C |
| 2024 | 18.2 C | +1.71 C |
| 2025 | 17.7 C | +1.23 C |
The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1934 to 2025. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 60 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 (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1934 to 2025 | 60 | Rise |
| Mean daily maximum | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.4) per decade | 1934 to 2025 | 60 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.4 to 0.7) per decade | 1934 to 2025 | 60 | 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
1934 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 46.1 C (115.0 F) | 2024 | 42.2 C (108.0 F) | 64 |
| Coldest night (TNn) | -16.1 C (3.0 F) | 1963 | -8.6 C (16.5 F) | 64 |
| Wettest day (Rx1day) | 99.8 mm (3.9 in) | 2023 | 23.9 mm (0.9 in) | 56 |
| Wettest five days (Rx5day) | 100.1 mm (3.9 in) | 2023 | 36.8 mm (1.4 in) | 56 |
| Longest dry spell (CDD) | 284 days | 1962 | 131 days | 56 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1934 | 43.3 C (109.9 F) |
| 1935 | 40.6 C (105.1 F) |
| 1936 | 42.2 C (108.0 F) |
| 1937 | 42.2 C (108.0 F) |
| 1938 | 42.8 C (109.0 F) |
| 1939 | 41.7 C (107.1 F) |
| 1940 | 41.7 C (107.1 F) |
| 1941 | 41.7 C (107.1 F) |
| 1948 | 41.1 C (106.0 F) |
| 1949 | 41.1 C (106.0 F) |
| 1950 | 42.8 C (109.0 F) |
| 1951 | 41.7 C (107.1 F) |
| 1952 | 40.6 C (105.1 F) |
| 1953 | 42.2 C (108.0 F) |
| 1954 | 43.3 C (109.9 F) |
| 1955 | 41.7 C (107.1 F) |
| 1956 | 43.3 C (109.9 F) |
| 1957 | 41.1 C (106.0 F) |
| 1958 | 42.2 C (108.0 F) |
| 1959 | 41.7 C (107.1 F) |
| 1960 | 43.9 C (111.0 F) |
| 1961 | 45.0 C (113.0 F) |
| 1962 | 42.8 C (109.0 F) |
| 1963 | 40.6 C (105.1 F) |
| 1964 | 42.2 C (108.0 F) |
| 1965 | 42.2 C (108.0 F) |
| 1966 | 42.8 C (109.0 F) |
| 1967 | 42.8 C (109.0 F) |
| 1968 | 41.7 C (107.1 F) |
| 1969 | 42.8 C (109.0 F) |
| 1970 | 42.8 C (109.0 F) |
| 1971 | 41.7 C (107.1 F) |
| 1972 | 44.4 C (111.9 F) |
| 1973 | 43.3 C (109.9 F) |
| 1974 | 27.2 C (81.0 F) |
| 1998 | 43.9 C (111.0 F) |
| 1999 | 40.6 C (105.1 F) |
| 2000 | 41.7 C (107.1 F) |
| 2001 | 42.2 C (108.0 F) |
| 2002 | 42.2 C (108.0 F) |
| 2003 | 42.8 C (109.0 F) |
| 2004 | 41.7 C (107.1 F) |
| 2005 | 43.3 C (109.9 F) |
| 2006 | 42.2 C (108.0 F) |
| 2007 | 45.0 C (113.0 F) |
| 2008 | 44.4 C (111.9 F) |
| 2009 | 43.3 C (109.9 F) |
| 2010 | 41.7 C (107.1 F) |
| 2011 | 41.7 C (107.1 F) |
| 2012 | 42.8 C (109.0 F) |
| 2013 | 43.9 C (111.0 F) |
| 2014 | 41.7 C (107.1 F) |
| 2015 | 41.1 C (106.0 F) |
| 2016 | 43.3 C (109.9 F) |
| 2017 | 42.8 C (109.0 F) |
| 2018 | 42.8 C (109.0 F) |
| 2019 | 40.6 C (105.1 F) |
| 2020 | 43.9 C (111.0 F) |
| 2021 | 44.4 C (111.9 F) |
| 2022 | 43.3 C (109.9 F) |
| 2023 | 43.9 C (111.0 F) |
| 2024 | 46.1 C (115.0 F) |
| 2025 | 41.1 C (106.0 F) |
| 2026 | 41.7 C (107.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1934 | -7.2 C (19.0 F) |
| 1935 | -11.1 C (12.0 F) |
| 1936 | -7.8 C (18.0 F) |
| 1937 | -12.8 C (9.0 F) |
| 1938 | -11.1 C (12.0 F) |
| 1939 | -7.2 C (19.0 F) |
| 1940 | -11.1 C (12.0 F) |
| 1941 | -9.4 C (15.1 F) |
| 1948 | -10.0 C (14.0 F) |
| 1949 | -11.7 C (10.9 F) |
| 1950 | -12.2 C (10.0 F) |
| 1951 | -8.9 C (16.0 F) |
| 1952 | -8.9 C (16.0 F) |
| 1953 | -12.2 C (10.0 F) |
| 1954 | -10.0 C (14.0 F) |
| 1955 | -8.3 C (17.1 F) |
| 1956 | -12.2 C (10.0 F) |
| 1957 | -15.6 C (3.9 F) |
| 1958 | -8.3 C (17.1 F) |
| 1959 | -6.7 C (19.9 F) |
| 1960 | -8.9 C (16.0 F) |
| 1961 | -9.4 C (15.1 F) |
| 1962 | -14.4 C (6.1 F) |
| 1963 | -16.1 C (3.0 F) |
| 1964 | -15.6 C (3.9 F) |
| 1965 | -10.6 C (12.9 F) |
| 1966 | -9.4 C (15.1 F) |
| 1967 | -8.9 C (16.0 F) |
| 1968 | -12.8 C (9.0 F) |
| 1969 | -10.0 C (14.0 F) |
| 1970 | -12.2 C (10.0 F) |
| 1971 | -11.1 C (12.0 F) |
| 1972 | -11.1 C (12.0 F) |
| 1973 | -11.1 C (12.0 F) |
| 1974 | -11.1 C (12.0 F) |
| 1998 | -11.7 C (10.9 F) |
| 1999 | -6.7 C (19.9 F) |
| 2000 | -6.7 C (19.9 F) |
| 2001 | -5.0 C (23.0 F) |
| 2002 | -7.2 C (19.0 F) |
| 2003 | -6.7 C (19.9 F) |
| 2004 | -7.2 C (19.0 F) |
| 2005 | -6.7 C (19.9 F) |
| 2006 | -7.7 C (18.1 F) |
| 2007 | -12.1 C (10.2 F) |
| 2008 | -7.7 C (18.1 F) |
| 2009 | -6.6 C (20.1 F) |
| 2010 | -6.0 C (21.2 F) |
| 2011 | -7.1 C (19.2 F) |
| 2012 | -7.7 C (18.1 F) |
| 2013 | -9.3 C (15.3 F) |
| 2014 | -4.3 C (24.3 F) |
| 2015 | -6.6 C (20.1 F) |
| 2016 | -8.2 C (17.2 F) |
| 2017 | -6.6 C (20.1 F) |
| 2018 | -6.0 C (21.2 F) |
| 2019 | -4.9 C (23.2 F) |
| 2020 | -7.1 C (19.2 F) |
| 2021 | -4.9 C (23.2 F) |
| 2022 | -6.6 C (20.1 F) |
| 2023 | -6.0 C (21.2 F) |
| 2024 | -4.9 C (23.2 F) |
| 2025 | -7.1 C (19.2 F) |
| 2026 | -3.9 C (25.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1948 | 6.9 mm (0.27 in) |
| 1949 | 12.2 mm (0.5 in) |
| 1950 | 13.5 mm (0.5 in) |
| 1951 | 20.8 mm (0.8 in) |
| 1952 | 32.3 mm (1.3 in) |
| 1953 | 6.9 mm (0.27 in) |
| 1954 | 34.0 mm (1.3 in) |
| 1955 | 19.1 mm (0.8 in) |
| 1956 | 23.1 mm (0.9 in) |
| 1957 | 39.1 mm (1.5 in) |
| 1958 | 20.8 mm (0.8 in) |
| 1959 | 12.7 mm (0.5 in) |
| 1960 | 19.1 mm (0.8 in) |
| 1961 | 17.3 mm (0.7 in) |
| 1962 | 32.0 mm (1.3 in) |
| 1963 | 20.6 mm (0.8 in) |
| 1964 | 19.3 mm (0.8 in) |
| 1965 | 64.0 mm (2.5 in) |
| 1966 | 35.1 mm (1.4 in) |
| 1967 | 52.8 mm (2.1 in) |
| 1968 | 39.4 mm (1.6 in) |
| 1969 | 23.4 mm (0.9 in) |
| 1970 | 35.8 mm (1.4 in) |
| 1971 | 33.5 mm (1.3 in) |
| 1972 | 12.2 mm (0.5 in) |
| 1973 | 33.8 mm (1.3 in) |
| 1974 | 31.5 mm (1.2 in) |
| 1998 | 7.4 mm (0.29 in) |
| 1999 | 10.7 mm (0.4 in) |
| 2000 | 11.7 mm (0.5 in) |
| 2001 | 31.2 mm (1.2 in) |
| 2002 | 14.7 mm (0.6 in) |
| 2003 | 70.9 mm (2.8 in) |
| 2004 | 53.3 mm (2.1 in) |
| 2005 | 54.4 mm (2.1 in) |
| 2006 | 18.3 mm (0.7 in) |
| 2007 | 18.5 mm (0.7 in) |
| 2008 | 19.3 mm (0.8 in) |
| 2009 | 17.3 mm (0.7 in) |
| 2010 | 26.2 mm (1.0 in) |
| 2011 | 32.8 mm (1.3 in) |
| 2012 | 13.7 mm (0.5 in) |
| 2013 | 36.1 mm (1.4 in) |
| 2014 | 31.8 mm (1.3 in) |
| 2015 | 24.4 mm (1.0 in) |
| 2016 | 19.1 mm (0.8 in) |
| 2017 | 32.5 mm (1.3 in) |
| 2018 | 36.3 mm (1.4 in) |
| 2019 | 32.0 mm (1.3 in) |
| 2020 | 37.8 mm (1.5 in) |
| 2021 | 21.6 mm (0.9 in) |
| 2022 | 16.8 mm (0.7 in) |
| 2023 | 99.8 mm (3.9 in) |
| 2024 | 43.2 mm (1.7 in) |
| 2025 | 43.9 mm (1.7 in) |
| 2026 | 22.1 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1948 | 8.7 mm (0.34 in) |
| 1949 | 34.4 mm (1.4 in) |
| 1950 | 14.5 mm (0.6 in) |
| 1951 | 23.1 mm (0.9 in) |
| 1952 | 73.7 mm (2.9 in) |
| 1953 | 9.1 mm (0.36 in) |
| 1954 | 39.1 mm (1.5 in) |
| 1955 | 38.2 mm (1.5 in) |
| 1956 | 42.4 mm (1.7 in) |
| 1957 | 50.3 mm (2.0 in) |
| 1958 | 27.9 mm (1.1 in) |
| 1959 | 21.8 mm (0.9 in) |
| 1960 | 31.6 mm (1.2 in) |
| 1961 | 17.6 mm (0.7 in) |
| 1962 | 57.2 mm (2.3 in) |
| 1963 | 35.3 mm (1.4 in) |
| 1964 | 21.3 mm (0.8 in) |
| 1965 | 74.2 mm (2.9 in) |
| 1966 | 35.1 mm (1.4 in) |
| 1967 | 96.0 mm (3.8 in) |
| 1968 | 44.7 mm (1.8 in) |
| 1969 | 48.0 mm (1.9 in) |
| 1970 | 60.9 mm (2.4 in) |
| 1971 | 61.0 mm (2.4 in) |
| 1972 | 22.6 mm (0.9 in) |
| 1973 | 48.3 mm (1.9 in) |
| 1974 | 64.1 mm (2.5 in) |
| 1998 | 13.0 mm (0.5 in) |
| 1999 | 12.7 mm (0.5 in) |
| 2000 | 21.9 mm (0.9 in) |
| 2001 | 57.4 mm (2.3 in) |
| 2002 | 27.1 mm (1.1 in) |
| 2003 | 90.8 mm (3.6 in) |
| 2004 | 86.4 mm (3.4 in) |
| 2005 | 86.1 mm (3.4 in) |
| 2006 | 23.6 mm (0.9 in) |
| 2007 | 18.8 mm (0.7 in) |
| 2008 | 32.3 mm (1.3 in) |
| 2009 | 40.5 mm (1.6 in) |
| 2010 | 76.1 mm (3.0 in) |
| 2011 | 34.3 mm (1.4 in) |
| 2012 | 15.7 mm (0.6 in) |
| 2013 | 46.7 mm (1.8 in) |
| 2014 | 47.6 mm (1.9 in) |
| 2015 | 24.4 mm (1.0 in) |
| 2016 | 31.7 mm (1.2 in) |
| 2017 | 34.8 mm (1.4 in) |
| 2018 | 40.6 mm (1.6 in) |
| 2019 | 37.6 mm (1.5 in) |
| 2020 | 57.3 mm (2.3 in) |
| 2021 | 23.1 mm (0.9 in) |
| 2022 | 22.1 mm (0.9 in) |
| 2023 | 100.1 mm (3.9 in) |
| 2024 | 72.6 mm (2.9 in) |
| 2025 | 54.8 mm (2.2 in) |
| 2026 | 35.9 mm (1.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1948 | 108 days |
| 1949 | 151 days |
| 1950 | 88 days |
| 1951 | 163 days |
| 1952 | 88 days |
| 1953 | 170 days |
| 1954 | 225 days |
| 1955 | 115 days |
| 1956 | 101 days |
| 1957 | 114 days |
| 1958 | 98 days |
| 1959 | 139 days |
| 1960 | 164 days |
| 1961 | 128 days |
| 1962 | 284 days |
| 1963 | 55 days |
| 1964 | 173 days |
| 1965 | 96 days |
| 1966 | 176 days |
| 1967 | 74 days |
| 1968 | 118 days |
| 1969 | 117 days |
| 1970 | 211 days |
| 1971 | 58 days |
| 1972 | 108 days |
| 1973 | 187 days |
| 1974 | 43 days |
| 1998 | 113 days |
| 1999 | 89 days |
| 2000 | 132 days |
| 2001 | 160 days |
| 2002 | 213 days |
| 2003 | 165 days |
| 2004 | 230 days |
| 2005 | 78 days |
| 2006 | 83 days |
| 2007 | 169 days |
| 2008 | 161 days |
| 2009 | 259 days |
| 2010 | 82 days |
| 2011 | 101 days |
| 2012 | 209 days |
| 2013 | 75 days |
| 2014 | 72 days |
| 2015 | 64 days |
| 2016 | 180 days |
| 2017 | 188 days |
| 2018 | 251 days |
| 2019 | 177 days |
| 2020 | 130 days |
| 2021 | 226 days |
| 2022 | 85 days |
| 2023 | 107 days |
| 2024 | 262 days |
| 2025 | 139 days |
| 2026 | 195 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
60 years with a frostAcross 60 years with a frost, the median last spring frost at Palmdale AP falls on 6 April and the median first autumn frost on 6 November, which leaves a median of 218 days between them.
In 1971 to 2025 the median growing season was 237 days. That is 27 days more than in 1934 to 1970.
Fitted over all years, the growing season changes by +5.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1934 to 1970) | Recent period (1971 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 April | 12 April | 20 March | 23 days earlier | -3.5 days per decade |
| First autumn frost | 6 November | 3 November | 11 November | 8 days later | +1.6 days per decade |
| Growing days | 218 days | 210 days | 237 days | 27 days more | +5.1 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
52 years, 1949 to 2025A day with at least 25.7 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 92.4 mm (3.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 25.7 mm (1.0 in) | |
| 5 years | 39.9 mm (1.6 in) | |
| 10 years | 50.6 mm (2.0 in) | |
| 25 years | 65.8 mm (2.6 in) | |
| 50 years | 78.5 mm (3.1 in) | |
| 100 years | 92.4 mm (3.6 in) | Longer than the 52 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, 52 years of values from 1949 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: 99.8 mm (3.9 in) in 2023; 70.9 mm (2.8 in) in 2003; 64.0 mm (2.5 in) in 1965.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Palmdale AP, at 2017. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2017 ran 0.3 C (0.5 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2017 | +0.3 | +0.5 | 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.
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).