Redwood City Weather Records (USC00047339)
Record envelope, standing records and threshold days for Redwood City (USC00047339), California, United States, with 121 years of record.
Key Facts for Redwood City
- Redwood City (USC00047339) is a weather station in California, United States at 37.48 latitude and -122.24 longitude, 9 m (31 ft) above sea level.
- The station reports from 1906 to 2026, 121 years of record.
- 1,464 records set at Redwood City still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Redwood City tied a daily record high minimum temperature of 15.6 C (60.1 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, 37.48 latitude, -122.24 longitude.
- Elevation: 9 m (31 ft).
- Period of record: 1906 to 2026, 121 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
16 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 25.6 C (78.1 F) | -8.9 C (16.0 F) | 25.0 C (77.0 F) | 0.6 C (33.1 F) |
| Feb | 26.7 C (80.1 F) | -3.9 C (25.0 F) | 26.7 C (80.1 F) | 1.7 C (35.1 F) |
| Mar | 34.4 C (93.9 F) | -1.7 C (28.9 F) | 34.4 C (93.9 F) | 5.6 C (42.1 F) |
| Apr | 35.6 C (96.1 F) | -0.6 C (30.9 F) | 28.9 C (84.0 F) | 6.1 C (43.0 F) |
| May | 38.9 C (102.0 F) | 2.2 C (36.0 F) | 31.1 C (88.0 F) | 8.3 C (46.9 F) |
| Jun | 42.8 C (109.0 F) | 2.8 C (37.0 F) | 36.7 C (98.1 F) | 7.8 C (46.0 F) |
| Jul | 43.3 C (109.9 F) | 4.4 C (39.9 F) | 36.1 C (97.0 F) | 11.1 C (52.0 F) |
| Aug | 40.6 C (105.1 F) | 5.6 C (42.1 F) | 32.8 C (91.0 F) | 11.1 C (52.0 F) |
| Sep | 43.3 C (109.9 F) | 3.3 C (37.9 F) | 37.8 C (100.0 F) | 8.3 C (46.9 F) |
| Oct | 40.0 C (104.0 F) | 0.6 C (33.1 F) | 37.2 C (99.0 F) | 7.2 C (45.0 F) |
| Nov | 31.1 C (88.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Dec | 24.4 C (75.9 F) | -7.8 C (18.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1930 | 5 |
| 1931 | 45 |
| 1932 | 50 |
| 1933 | 53 |
| 1934 | 28 |
| 1935 | 42 |
| 1936 | 17 |
| 1937 | 28 |
| 1938 | 12 |
| 1939 | 27 |
| 1940 | 18 |
| 1941 | 15 |
| 1942 | 8 |
| 1943 | 20 |
| 1944 | 10 |
| 1945 | 14 |
| 1946 | 16 |
| 1947 | 9 |
| 1948 | 15 |
| 1949 | 25 |
| 1950 | 32 |
| 1951 | 10 |
| 1952 | 10 |
| 1953 | 10 |
| 1954 | 8 |
| 1955 | 23 |
| 1956 | 15 |
| 1957 | 9 |
| 1958 | 16 |
| 1959 | 15 |
| 1960 | 10 |
| 1961 | 20 |
| 1962 | 9 |
| 1963 | 12 |
| 1964 | 19 |
| 1965 | 16 |
| 1966 | 6 |
| 1967 | 16 |
| 1968 | 17 |
| 1969 | 9 |
| 1970 | 11 |
| 1971 | 16 |
| 1972 | 27 |
| 1973 | 16 |
| 1974 | 10 |
| 1975 | 14 |
| 1976 | 20 |
| 1977 | 13 |
| 1978 | 4 |
| 1979 | 17 |
| 1980 | 17 |
| 1981 | 20 |
| 1982 | 16 |
| 1983 | 9 |
| 1984 | 12 |
| 1985 | 13 |
| 1986 | 11 |
| 1987 | 16 |
| 1988 | 10 |
| 1989 | 24 |
| 1990 | 15 |
| 1991 | 15 |
| 1992 | 8 |
| 1993 | 12 |
| 1994 | 5 |
| 1995 | 10 |
| 1996 | 14 |
| 1997 | 13 |
| 1998 | 14 |
| 1999 | 21 |
| 2000 | 5 |
| 2001 | 11 |
| 2002 | 6 |
| 2003 | 11 |
| 2004 | 9 |
| 2005 | 5 |
| 2006 | 15 |
| 2007 | 9 |
| 2009 | 16 |
| 2010 | 24 |
| 2011 | 15 |
| 2012 | 14 |
| 2013 | 10 |
| 2014 | 6 |
| 2015 | 11 |
| 2016 | 10 |
| 2017 | 15 |
| 2018 | 13 |
| 2019 | 16 |
| 2020 | 17 |
| 2021 | 4 |
| 2022 | 8 |
| 2023 | 13 |
| 2024 | 11 |
| 2025 | 12 |
| 2026 | 16 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1955-12-23 | Record daily precipitation | Record daily precipitation 101.6 mm (4.0 in) |
| 1961-06-15 | Record high maximum temperature | Record high maximum temperature 42.8 C (109.0 F) |
| 1962-10-13 | Record daily precipitation | Record daily precipitation 124.0 mm (4.9 in) |
| 1972-07-14 | Record high maximum temperature | Record high maximum temperature 43.3 C (109.9 F) |
| 1972-12-09 | Record low maximum temperature | Record low maximum temperature 3.3 C (37.9 F) |
| 1990-12-22 | Record low maximum temperature | Record low maximum temperature 2.8 C (37.0 F) |
| 2002-01-02 | Record daily snowfall | Record daily snowfall 1.8 cm (0.7 in) |
Wettest Day of Each Month
Oct: 124.0 mm (4.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 121.9 mm (4.8 in) | 21 January 1967 |
| Feb | 75.9 mm (3.0 in) | 13 February 1987 |
| Mar | 83.3 mm (3.3 in) | 30 March 1940 |
| Apr | 64.5 mm (2.5 in) | 2 April 1958 |
| May | 33.8 mm (1.3 in) | 18 May 1957 |
| Jun | 25.4 mm (1.0 in) | 23 June 1912 |
| Jul | 7.6 mm (0.30 in) | 30 July 1966 |
| Aug | 20.6 mm (0.8 in) | 20 August 1997 |
| Sep | 77.5 mm (3.1 in) | 18 September 1959 |
| Oct | 124.0 mm (4.9 in) | 13 October 1962 |
| Nov | 80.3 mm (3.2 in) | 19 November 1946 |
| Dec | 113.5 mm (4.5 in) | 31 December 2022 |
Period of Record Coverage
1930 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1930 | 92 | 25% | No |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 364 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 348 | 95% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 334 | 92% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 362 | 99% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 351 | 96% | Yes |
| 1949 | 363 | 99% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 363 | 99% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 354 | 97% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 364 | 99% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 363 | 99% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 364 | 99% | Yes |
| 1981 | 360 | 99% | Yes |
| 1982 | 344 | 94% | Yes |
| 1983 | 353 | 97% | Yes |
| 1984 | 346 | 95% | Yes |
| 1985 | 354 | 97% | Yes |
| 1986 | 351 | 96% | Yes |
| 1987 | 345 | 95% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 361 | 99% | Yes |
| 1991 | 361 | 99% | Yes |
| 1992 | 357 | 98% | Yes |
| 1993 | 360 | 99% | Yes |
| 1994 | 356 | 98% | Yes |
| 1995 | 348 | 95% | Yes |
| 1996 | 356 | 97% | Yes |
| 1997 | 358 | 98% | Yes |
| 1998 | 356 | 98% | Yes |
| 1999 | 321 | 88% | No |
| 2000 | 205 | 56% | No |
| 2001 | 326 | 89% | No |
| 2002 | 291 | 80% | No |
| 2003 | 349 | 96% | Yes |
| 2004 | 359 | 98% | Yes |
| 2005 | 235 | 64% | No |
| 2006 | 276 | 76% | No |
| 2007 | 343 | 94% | Yes |
| 2008 | 111 | 30% | No |
| 2009 | 334 | 92% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 361 | 99% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 361 | 99% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 364 | 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 | 365 | 100% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 October 2026 | Redwood City, US | daily high min (Tie, Provisional) | 15.6 C (60.1 F) | tie | 41 years | 5 of 100 (Routine) |
| 20 September 2026 | Redwood City, US | daily low max (Tie, Provisional) | 20.6 C (69.1 F) | tie | 16 years | 3 of 100 (Routine) |
| 10 September 2026 | Redwood City, US | daily high max (Tie, Provisional) | 36.7 C (98.1 F) | tie | 81 years | 8 of 100 (Routine) |
| 7 July 2026 | Redwood City, US | daily low max (Tie) | 19.4 C (66.9 F) | tie | 3 years | 2 of 100 (Routine) |
| 16 June 2026 | Redwood City, US | daily high min (Tie) | 16.1 C (61.0 F) | tie | 65 years | 7 of 100 (Routine) |
| 21 April 2026 | Redwood City, US | daily rain | 11.7 mm (0.5 in) | 2.8 mm (0.11 in) | 71 years | 20 of 100 (Routine) |
| 20 April 2026 | Redwood City, US | daily rain | 15.0 mm (0.6 in) | 2.0 mm (0.08 in) | 4 years | 13 of 100 (Routine) |
| 10 April 2026 | Redwood City, US | daily high min (Tie) | 12.2 C (54.0 F) | tie | 84 years | 8 of 100 (Routine) |
| 31 March 2026 | Redwood City, US | daily high min | 14.4 C (57.9 F) | 1.1 C (2.0 F) | 37 years | 23 of 100 (Routine) |
| 29 March 2026 | Redwood City, US | daily high max | 31.1 C (88.0 F) | 1.7 C (3.1 F) | 57 years | 30 of 100 (Routine) |
| 28 March 2026 | Redwood City, US | daily high max | 28.9 C (84.0 F) | 1.7 C (3.1 F) | 57 years | 30 of 100 (Routine) |
| 27 March 2026 | Redwood City, US | daily high max | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 56 years | 28 of 100 (Routine) |
| 23 March 2026 | Redwood City, US | daily high max | 28.3 C (82.9 F) | 2.2 C (4.0 F) | 95 years | 42 of 100 (Notable) |
| 21 March 2026 | Redwood City, US | daily high max (Tie) | 28.3 C (82.9 F) | tie | 60 years | 6 of 100 (Routine) |
| 20 March 2026 | Redwood City, US | monthly high max | 34.4 C (93.9 F) | 0.5 C (0.9 F) | 0 years | 20 of 100 (Routine) |
| 20 March 2026 | Redwood City, US | daily high min (Tie) | 13.3 C (55.9 F) | tie | 28 years | 4 of 100 (Routine) |
| 19 March 2026 | Redwood City, US | daily high max | 32.8 C (91.0 F) | 5.6 C (10.1 F) | 65 years | 43 of 100 (Notable) |
| 18 March 2026 | Redwood City, US | daily high min | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 48 years | 25 of 100 (Routine) |
| 18 March 2026 | Redwood City, US | daily high max | 32.2 C (90.0 F) | 3.3 C (5.9 F) | 21 years | 23 of 100 (Routine) |
| 17 March 2026 | Redwood City, US | monthly high max | 33.9 C (93.0 F) | 1.7 C (3.1 F) | 0 years | 23 of 100 (Routine) |
Climate Trend
86 complete years, 1931 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1931 | 14.5 C | -0.64 C |
| 1932 | 13.6 C | -1.53 C |
| 1933 | 13.5 C | -1.58 C |
| 1934 | 15.3 C | +0.20 C |
| 1935 | 14.2 C | -0.95 C |
| 1936 | 15.2 C | +0.04 C |
| 1937 | 14.4 C | -0.76 C |
| 1938 | 14.7 C | -0.41 C |
| 1939 | 14.9 C | -0.20 C |
| 1940 | 15.4 C | +0.25 C |
| 1942 | 15.1 C | -0.01 C |
| 1944 | 15.4 C | +0.30 C |
| 1945 | 15.2 C | +0.06 C |
| 1946 | 14.2 C | -0.96 C |
| 1947 | 14.7 C | -0.43 C |
| 1948 | 14.1 C | -1.01 C |
| 1949 | 14.2 C | -0.90 C |
| 1950 | 15.2 C | +0.13 C |
| 1951 | 14.6 C | -0.49 C |
| 1952 | 14.6 C | -0.49 C |
| 1953 | 14.8 C | -0.30 C |
| 1954 | 14.7 C | -0.37 C |
| 1955 | 14.0 C | -1.13 C |
| 1956 | 14.4 C | -0.75 C |
| 1957 | 15.2 C | +0.06 C |
| 1958 | 15.8 C | +0.73 C |
| 1959 | 16.0 C | +0.86 C |
| 1960 | 15.1 C | -0.05 C |
| 1961 | 15.2 C | +0.13 C |
| 1962 | 14.8 C | -0.32 C |
| 1963 | 14.9 C | -0.18 C |
| 1964 | 14.8 C | -0.33 C |
| 1965 | 14.8 C | -0.27 C |
| 1966 | 15.3 C | +0.20 C |
| 1967 | 15.0 C | -0.12 C |
| 1968 | 15.0 C | -0.10 C |
| 1969 | 14.9 C | -0.19 C |
| 1970 | 15.3 C | +0.21 C |
| 1971 | 14.4 C | -0.73 C |
| 1972 | 15.0 C | -0.10 C |
| 1973 | 15.3 C | +0.19 C |
| 1974 | 15.1 C | -0.04 C |
| 1975 | 14.4 C | -0.76 C |
| 1976 | 15.0 C | -0.08 C |
| 1977 | 15.1 C | -0.03 C |
| 1978 | 15.5 C | +0.38 C |
| 1979 | 15.4 C | +0.25 C |
| 1980 | 15.7 C | +0.60 C |
| 1981 | 16.2 C | +1.04 C |
| 1982 | 14.8 C | -0.33 C |
| 1983 | 16.1 C | +0.95 C |
| 1984 | 15.6 C | +0.47 C |
| 1985 | 14.6 C | -0.55 C |
| 1986 | 15.5 C | +0.43 C |
| 1987 | 15.4 C | +0.25 C |
| 1988 | 15.4 C | +0.25 C |
| 1989 | 14.8 C | -0.31 C |
| 1990 | 15.0 C | -0.15 C |
| 1991 | 14.9 C | -0.23 C |
| 1992 | 15.8 C | +0.72 C |
| 1993 | 15.5 C | +0.41 C |
| 1994 | 14.6 C | -0.56 C |
| 1995 | 15.8 C | +0.65 C |
| 1996 | 15.8 C | +0.66 C |
| 1997 | 15.8 C | +0.73 C |
| 1998 | 14.7 C | -0.38 C |
| 2003 | 15.7 C | +0.56 C |
| 2004 | 15.5 C | +0.42 C |
| 2007 | 15.2 C | +0.04 C |
| 2009 | 15.1 C | -0.05 C |
| 2010 | 14.6 C | -0.47 C |
| 2011 | 14.6 C | -0.54 C |
| 2012 | 15.1 C | -0.03 C |
| 2013 | 15.3 C | +0.18 C |
| 2014 | 16.6 C | +1.47 C |
| 2015 | 16.3 C | +1.15 C |
| 2016 | 15.8 C | +0.70 C |
| 2017 | 15.9 C | +0.80 C |
| 2018 | 15.4 C | +0.26 C |
| 2019 | 15.5 C | +0.40 C |
| 2020 | 16.0 C | +0.86 C |
| 2021 | 15.2 C | +0.07 C |
| 2022 | 15.3 C | +0.21 C |
| 2023 | 15.1 C | -0.02 C |
| 2024 | 16.0 C | +0.90 C |
| 2025 | 15.7 C | +0.60 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1931 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 86 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1931 to 2025 | 86 | Rise |
| Mean daily maximum | 0.02 C (-0.03 to 0.07) per decade | 0.04 F (-0.05 to 0.13) per decade | 1931 to 2025 | 86 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1931 to 2025 | 86 | 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) | 43.3 C (109.9 F) | 1972 | 37.8 C (100.0 F) | 97 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1949 | -1.7 C (28.9 F) | 97 |
| Wettest day (Rx1day) | 124.0 mm (4.9 in) | 1962 | 46.7 mm (1.8 in) | 110 |
| Wettest five days (Rx5day) | 237.7 mm (9.4 in) | 1955 | 87.6 mm (3.4 in) | 108 |
| Longest dry spell (CDD) | 218 days | 2018 | 124 days | 109 |
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 |
| 1930 | 36.1 C (97.0 F) |
| 1931 | 41.1 C (106.0 F) |
| 1932 | 39.4 C (102.9 F) |
| 1933 | 36.7 C (98.1 F) |
| 1934 | 39.4 C (102.9 F) |
| 1935 | 38.3 C (100.9 F) |
| 1936 | 37.8 C (100.0 F) |
| 1937 | 38.9 C (102.0 F) |
| 1938 | 37.8 C (100.0 F) |
| 1939 | 39.4 C (102.9 F) |
| 1940 | 37.8 C (100.0 F) |
| 1941 | 36.7 C (98.1 F) |
| 1942 | 36.7 C (98.1 F) |
| 1943 | 38.3 C (100.9 F) |
| 1944 | 39.4 C (102.9 F) |
| 1945 | 38.9 C (102.0 F) |
| 1946 | 39.4 C (102.9 F) |
| 1947 | 37.8 C (100.0 F) |
| 1948 | 39.4 C (102.9 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 40.6 C (105.1 F) |
| 1951 | 37.8 C (100.0 F) |
| 1952 | 37.8 C (100.0 F) |
| 1953 | 35.0 C (95.0 F) |
| 1954 | 38.3 C (100.9 F) |
| 1955 | 35.0 C (95.0 F) |
| 1956 | 36.7 C (98.1 F) |
| 1957 | 37.2 C (99.0 F) |
| 1958 | 37.8 C (100.0 F) |
| 1959 | 40.0 C (104.0 F) |
| 1960 | 42.2 C (108.0 F) |
| 1961 | 42.8 C (109.0 F) |
| 1962 | 38.3 C (100.9 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 35.0 C (95.0 F) |
| 1966 | 40.0 C (104.0 F) |
| 1967 | 37.2 C (99.0 F) |
| 1968 | 38.9 C (102.0 F) |
| 1969 | 36.1 C (97.0 F) |
| 1970 | 40.0 C (104.0 F) |
| 1971 | 41.1 C (106.0 F) |
| 1972 | 43.3 C (109.9 F) |
| 1973 | 39.4 C (102.9 F) |
| 1974 | 37.2 C (99.0 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 40.0 C (104.0 F) |
| 1977 | 38.3 C (100.9 F) |
| 1978 | 36.1 C (97.0 F) |
| 1979 | 39.4 C (102.9 F) |
| 1980 | 40.0 C (104.0 F) |
| 1981 | 40.0 C (104.0 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 40.6 C (105.1 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 37.8 C (100.0 F) |
| 1986 | 36.1 C (97.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 41.1 C (106.0 F) |
| 1989 | 37.8 C (100.0 F) |
| 1990 | 37.8 C (100.0 F) |
| 1991 | 37.8 C (100.0 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 40.0 C (104.0 F) |
| 1994 | 38.3 C (100.9 F) |
| 1995 | 39.4 C (102.9 F) |
| 1996 | 36.7 C (98.1 F) |
| 1997 | 36.7 C (98.1 F) |
| 1998 | 40.0 C (104.0 F) |
| 1999 | 36.7 C (98.1 F) |
| 2000 | 41.7 C (107.1 F) |
| 2001 | 38.3 C (100.9 F) |
| 2002 | 38.3 C (100.9 F) |
| 2003 | 37.8 C (100.0 F) |
| 2004 | 36.7 C (98.1 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 42.2 C (108.0 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 33.3 C (91.9 F) |
| 2009 | 38.3 C (100.9 F) |
| 2010 | 40.0 C (104.0 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 37.8 C (100.0 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 37.2 C (99.0 F) |
| 2015 | 38.3 C (100.9 F) |
| 2016 | 37.2 C (99.0 F) |
| 2017 | 42.2 C (108.0 F) |
| 2018 | 36.1 C (97.0 F) |
| 2019 | 38.9 C (102.0 F) |
| 2020 | 42.2 C (108.0 F) |
| 2021 | 39.4 C (102.9 F) |
| 2022 | 43.3 C (109.9 F) |
| 2023 | 35.6 C (96.1 F) |
| 2024 | 39.4 C (102.9 F) |
| 2025 | 37.2 C (99.0 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 | n/a |
| 1917 | n/a |
| 1918 | n/a |
| 1930 | -5.6 C (21.9 F) |
| 1931 | -5.0 C (23.0 F) |
| 1932 | -7.8 C (18.0 F) |
| 1933 | -3.9 C (25.0 F) |
| 1934 | -0.6 C (30.9 F) |
| 1935 | -2.2 C (28.0 F) |
| 1936 | -2.2 C (28.0 F) |
| 1937 | -7.2 C (19.0 F) |
| 1938 | -1.7 C (28.9 F) |
| 1939 | -1.7 C (28.9 F) |
| 1940 | -3.9 C (25.0 F) |
| 1941 | 0.6 C (33.1 F) |
| 1942 | -1.1 C (30.0 F) |
| 1943 | -3.3 C (26.1 F) |
| 1944 | 0.6 C (33.1 F) |
| 1945 | -2.8 C (27.0 F) |
| 1946 | -3.3 C (26.1 F) |
| 1947 | -3.9 C (25.0 F) |
| 1948 | -3.3 C (26.1 F) |
| 1949 | -8.9 C (16.0 F) |
| 1950 | -4.4 C (24.1 F) |
| 1951 | -2.2 C (28.0 F) |
| 1952 | -2.8 C (27.0 F) |
| 1953 | -1.7 C (28.9 F) |
| 1954 | -1.7 C (28.9 F) |
| 1955 | -1.7 C (28.9 F) |
| 1956 | -1.7 C (28.9 F) |
| 1957 | -2.2 C (28.0 F) |
| 1958 | -0.6 C (30.9 F) |
| 1959 | 0.0 C (32.0 F) |
| 1960 | -4.4 C (24.1 F) |
| 1961 | -2.8 C (27.0 F) |
| 1962 | -3.3 C (26.1 F) |
| 1963 | -4.4 C (24.1 F) |
| 1964 | -1.1 C (30.0 F) |
| 1965 | -2.8 C (27.0 F) |
| 1966 | -2.2 C (28.0 F) |
| 1967 | -2.2 C (28.0 F) |
| 1968 | -4.4 C (24.1 F) |
| 1969 | -1.7 C (28.9 F) |
| 1970 | -2.8 C (27.0 F) |
| 1971 | -2.2 C (28.0 F) |
| 1972 | -5.6 C (21.9 F) |
| 1973 | -2.8 C (27.0 F) |
| 1974 | -2.2 C (28.0 F) |
| 1975 | -3.9 C (25.0 F) |
| 1976 | -4.4 C (24.1 F) |
| 1977 | -1.1 C (30.0 F) |
| 1978 | -3.9 C (25.0 F) |
| 1979 | -2.8 C (27.0 F) |
| 1980 | -1.7 C (28.9 F) |
| 1981 | -0.6 C (30.9 F) |
| 1982 | -2.2 C (28.0 F) |
| 1983 | -1.1 C (30.0 F) |
| 1984 | -1.1 C (30.0 F) |
| 1985 | -2.2 C (28.0 F) |
| 1986 | 1.1 C (34.0 F) |
| 1987 | -1.1 C (30.0 F) |
| 1988 | -1.7 C (28.9 F) |
| 1989 | -3.9 C (25.0 F) |
| 1990 | -7.2 C (19.0 F) |
| 1991 | -2.2 C (28.0 F) |
| 1992 | -1.7 C (28.9 F) |
| 1993 | -2.8 C (27.0 F) |
| 1994 | -1.7 C (28.9 F) |
| 1995 | 0.6 C (33.1 F) |
| 1996 | -0.6 C (30.9 F) |
| 1997 | -2.8 C (27.0 F) |
| 1998 | -5.6 C (21.9 F) |
| 1999 | 0.0 C (32.0 F) |
| 2000 | 0.6 C (33.1 F) |
| 2001 | -0.6 C (30.9 F) |
| 2002 | -1.7 C (28.9 F) |
| 2003 | -0.6 C (30.9 F) |
| 2004 | -2.2 C (28.0 F) |
| 2005 | 3.9 C (39.0 F) |
| 2006 | -1.7 C (28.9 F) |
| 2007 | -3.3 C (26.1 F) |
| 2008 | 0.0 C (32.0 F) |
| 2009 | -2.2 C (28.0 F) |
| 2010 | -0.6 C (30.9 F) |
| 2011 | -1.7 C (28.9 F) |
| 2012 | -1.7 C (28.9 F) |
| 2013 | -3.3 C (26.1 F) |
| 2014 | 0.6 C (33.1 F) |
| 2015 | -2.2 C (28.0 F) |
| 2016 | -1.1 C (30.0 F) |
| 2017 | -0.6 C (30.9 F) |
| 2018 | -1.1 C (30.0 F) |
| 2019 | -0.6 C (30.9 F) |
| 2020 | 0.0 C (32.0 F) |
| 2021 | 0.6 C (33.1 F) |
| 2022 | -1.7 C (28.9 F) |
| 2023 | -0.6 C (30.9 F) |
| 2024 | 0.6 C (33.1 F) |
| 2025 | -0.6 C (30.9 F) |
| 2026 | 0.6 C (33.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1906 | 24.1 mm (0.9 in) |
| 1907 | 68.1 mm (2.7 in) |
| 1908 | 38.1 mm (1.5 in) |
| 1909 | 52.8 mm (2.1 in) |
| 1910 | 26.7 mm (1.1 in) |
| 1911 | 21.6 mm (0.9 in) |
| 1912 | 25.4 mm (1.0 in) |
| 1913 | 59.2 mm (2.3 in) |
| 1914 | 49.5 mm (1.9 in) |
| 1915 | 67.8 mm (2.7 in) |
| 1916 | 78.0 mm (3.1 in) |
| 1917 | 34.0 mm (1.3 in) |
| 1918 | 45.7 mm (1.8 in) |
| 1930 | 17.5 mm (0.7 in) |
| 1931 | 71.9 mm (2.8 in) |
| 1932 | 29.0 mm (1.1 in) |
| 1933 | 31.0 mm (1.2 in) |
| 1934 | 41.9 mm (1.6 in) |
| 1935 | 33.0 mm (1.3 in) |
| 1936 | 43.9 mm (1.7 in) |
| 1937 | 55.6 mm (2.2 in) |
| 1938 | 34.5 mm (1.4 in) |
| 1939 | 40.4 mm (1.6 in) |
| 1940 | 83.3 mm (3.3 in) |
| 1941 | 56.4 mm (2.2 in) |
| 1942 | 52.8 mm (2.1 in) |
| 1943 | 92.2 mm (3.6 in) |
| 1944 | 37.1 mm (1.5 in) |
| 1945 | 64.0 mm (2.5 in) |
| 1946 | 80.3 mm (3.2 in) |
| 1947 | 30.0 mm (1.2 in) |
| 1948 | 46.2 mm (1.8 in) |
| 1949 | 32.8 mm (1.3 in) |
| 1950 | 76.5 mm (3.0 in) |
| 1951 | 51.8 mm (2.0 in) |
| 1952 | 70.1 mm (2.8 in) |
| 1953 | 43.7 mm (1.7 in) |
| 1954 | 62.0 mm (2.4 in) |
| 1955 | 101.6 mm (4.0 in) |
| 1956 | 37.3 mm (1.5 in) |
| 1957 | 47.2 mm (1.9 in) |
| 1958 | 64.5 mm (2.5 in) |
| 1959 | 77.5 mm (3.1 in) |
| 1960 | 34.8 mm (1.4 in) |
| 1961 | 37.6 mm (1.5 in) |
| 1962 | 124.0 mm (4.9 in) |
| 1963 | 55.1 mm (2.2 in) |
| 1964 | 51.3 mm (2.0 in) |
| 1965 | 34.5 mm (1.4 in) |
| 1966 | 30.5 mm (1.2 in) |
| 1967 | 121.9 mm (4.8 in) |
| 1968 | 62.7 mm (2.5 in) |
| 1969 | 39.6 mm (1.6 in) |
| 1970 | 54.1 mm (2.1 in) |
| 1971 | 36.3 mm (1.4 in) |
| 1972 | 35.8 mm (1.4 in) |
| 1973 | 52.6 mm (2.1 in) |
| 1974 | 36.3 mm (1.4 in) |
| 1975 | 31.5 mm (1.2 in) |
| 1976 | 28.7 mm (1.1 in) |
| 1977 | 35.6 mm (1.4 in) |
| 1978 | 43.9 mm (1.7 in) |
| 1979 | 42.2 mm (1.7 in) |
| 1980 | 45.7 mm (1.8 in) |
| 1981 | 62.5 mm (2.5 in) |
| 1982 | 65.3 mm (2.6 in) |
| 1983 | 56.6 mm (2.2 in) |
| 1984 | 27.9 mm (1.1 in) |
| 1985 | 47.5 mm (1.9 in) |
| 1986 | 48.3 mm (1.9 in) |
| 1987 | 75.9 mm (3.0 in) |
| 1988 | 39.4 mm (1.6 in) |
| 1989 | 32.0 mm (1.3 in) |
| 1990 | 31.8 mm (1.3 in) |
| 1991 | 42.7 mm (1.7 in) |
| 1992 | 51.1 mm (2.0 in) |
| 1993 | 71.6 mm (2.8 in) |
| 1994 | 51.6 mm (2.0 in) |
| 1995 | 61.7 mm (2.4 in) |
| 1996 | 46.2 mm (1.8 in) |
| 1997 | 67.6 mm (2.7 in) |
| 1998 | 63.8 mm (2.5 in) |
| 1999 | 25.7 mm (1.0 in) |
| 2000 | 34.3 mm (1.4 in) |
| 2001 | 39.4 mm (1.6 in) |
| 2002 | 66.0 mm (2.6 in) |
| 2003 | 60.2 mm (2.4 in) |
| 2004 | 51.1 mm (2.0 in) |
| 2005 | 38.9 mm (1.5 in) |
| 2006 | 44.7 mm (1.8 in) |
| 2007 | 16.3 mm (0.6 in) |
| 2008 | 49.0 mm (1.9 in) |
| 2009 | 92.5 mm (3.6 in) |
| 2010 | 50.0 mm (2.0 in) |
| 2011 | 44.7 mm (1.8 in) |
| 2012 | 58.7 mm (2.3 in) |
| 2013 | 7.9 mm (0.31 in) |
| 2014 | 106.4 mm (4.2 in) |
| 2015 | 27.2 mm (1.1 in) |
| 2016 | 45.5 mm (1.8 in) |
| 2017 | 53.3 mm (2.1 in) |
| 2018 | 62.7 mm (2.5 in) |
| 2019 | 43.9 mm (1.7 in) |
| 2020 | 19.8 mm (0.8 in) |
| 2021 | 108.7 mm (4.3 in) |
| 2022 | 113.5 mm (4.5 in) |
| 2023 | 51.3 mm (2.0 in) |
| 2024 | 37.6 mm (1.5 in) |
| 2025 | 65.5 mm (2.6 in) |
| 2026 | 34.0 mm (1.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1906 | 42.4 mm (1.7 in) |
| 1907 | 114.9 mm (4.5 in) |
| 1908 | 73.6 mm (2.9 in) |
| 1909 | 111.2 mm (4.4 in) |
| 1910 | n/a |
| 1911 | 9.0 mm (0.35 in) |
| 1912 | 25.7 mm (1.0 in) |
| 1913 | 59.2 mm (2.3 in) |
| 1914 | 105.3 mm (4.1 in) |
| 1915 | 88.8 mm (3.5 in) |
| 1916 | 123.2 mm (4.9 in) |
| 1917 | n/a |
| 1918 | 28.7 mm (1.1 in) |
| 1930 | 24.9 mm (1.0 in) |
| 1931 | 135.2 mm (5.3 in) |
| 1932 | 71.1 mm (2.8 in) |
| 1933 | 70.6 mm (2.8 in) |
| 1934 | 70.0 mm (2.8 in) |
| 1935 | 53.4 mm (2.1 in) |
| 1936 | 103.3 mm (4.1 in) |
| 1937 | 100.3 mm (3.9 in) |
| 1938 | 92.0 mm (3.6 in) |
| 1939 | 48.0 mm (1.9 in) |
| 1940 | 137.6 mm (5.4 in) |
| 1941 | 100.2 mm (3.9 in) |
| 1942 | 123.4 mm (4.9 in) |
| 1943 | 168.7 mm (6.6 in) |
| 1944 | 55.7 mm (2.2 in) |
| 1945 | 118.6 mm (4.7 in) |
| 1946 | 107.3 mm (4.2 in) |
| 1947 | 39.7 mm (1.6 in) |
| 1948 | 60.2 mm (2.4 in) |
| 1949 | 51.3 mm (2.0 in) |
| 1950 | 150.7 mm (5.9 in) |
| 1951 | 131.3 mm (5.2 in) |
| 1952 | 111.4 mm (4.4 in) |
| 1953 | 50.0 mm (2.0 in) |
| 1954 | 67.5 mm (2.7 in) |
| 1955 | 237.7 mm (9.4 in) |
| 1956 | 73.1 mm (2.9 in) |
| 1957 | 83.8 mm (3.3 in) |
| 1958 | 137.4 mm (5.4 in) |
| 1959 | 103.7 mm (4.1 in) |
| 1960 | 62.7 mm (2.5 in) |
| 1961 | 67.1 mm (2.6 in) |
| 1962 | 162.2 mm (6.4 in) |
| 1963 | 142.5 mm (5.6 in) |
| 1964 | 82.9 mm (3.3 in) |
| 1965 | 88.3 mm (3.5 in) |
| 1966 | 84.3 mm (3.3 in) |
| 1967 | 193.5 mm (7.6 in) |
| 1968 | 84.8 mm (3.3 in) |
| 1969 | 98.3 mm (3.9 in) |
| 1970 | 133.7 mm (5.3 in) |
| 1971 | 62.7 mm (2.5 in) |
| 1972 | 99.1 mm (3.9 in) |
| 1973 | 111.8 mm (4.4 in) |
| 1974 | 62.5 mm (2.5 in) |
| 1975 | 68.6 mm (2.7 in) |
| 1976 | 46.0 mm (1.8 in) |
| 1977 | 67.3 mm (2.6 in) |
| 1978 | 127.5 mm (5.0 in) |
| 1979 | 79.7 mm (3.1 in) |
| 1980 | 131.3 mm (5.2 in) |
| 1981 | 140.2 mm (5.5 in) |
| 1982 | 124.2 mm (4.9 in) |
| 1983 | 121.9 mm (4.8 in) |
| 1984 | 54.0 mm (2.1 in) |
| 1985 | 50.0 mm (2.0 in) |
| 1986 | 157.0 mm (6.2 in) |
| 1987 | 112.2 mm (4.4 in) |
| 1988 | 60.2 mm (2.4 in) |
| 1989 | 43.6 mm (1.7 in) |
| 1990 | 50.6 mm (2.0 in) |
| 1991 | 77.5 mm (3.1 in) |
| 1992 | 111.3 mm (4.4 in) |
| 1993 | 107.1 mm (4.2 in) |
| 1994 | 86.9 mm (3.4 in) |
| 1995 | 132.6 mm (5.2 in) |
| 1996 | 80.4 mm (3.2 in) |
| 1997 | 102.4 mm (4.0 in) |
| 1998 | 149.6 mm (5.9 in) |
| 1999 | 62.8 mm (2.5 in) |
| 2000 | 56.2 mm (2.2 in) |
| 2001 | 80.9 mm (3.2 in) |
| 2002 | 193.0 mm (7.6 in) |
| 2003 | 72.6 mm (2.9 in) |
| 2004 | 166.1 mm (6.5 in) |
| 2005 | 89.5 mm (3.5 in) |
| 2006 | 46.3 mm (1.8 in) |
| 2007 | 38.9 mm (1.5 in) |
| 2008 | 90.2 mm (3.6 in) |
| 2009 | 96.1 mm (3.8 in) |
| 2010 | 133.8 mm (5.3 in) |
| 2011 | 83.5 mm (3.3 in) |
| 2012 | 109.5 mm (4.3 in) |
| 2013 | 13.5 mm (0.5 in) |
| 2014 | 150.7 mm (5.9 in) |
| 2015 | 56.4 mm (2.2 in) |
| 2016 | 88.6 mm (3.5 in) |
| 2017 | 105.9 mm (4.2 in) |
| 2018 | 78.2 mm (3.1 in) |
| 2019 | 67.1 mm (2.6 in) |
| 2020 | 36.1 mm (1.4 in) |
| 2021 | 135.2 mm (5.3 in) |
| 2022 | 163.6 mm (6.4 in) |
| 2023 | 154.2 mm (6.1 in) |
| 2024 | 70.8 mm (2.8 in) |
| 2025 | 77.7 mm (3.1 in) |
| 2026 | 83.9 mm (3.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1906 | 27 days |
| 1907 | 27 days |
| 1908 | 45 days |
| 1909 | 13 days |
| 1910 | n/a |
| 1911 | 19 days |
| 1912 | 29 days |
| 1913 | 54 days |
| 1914 | 46 days |
| 1915 | 161 days |
| 1916 | 72 days |
| 1917 | 1 day |
| 1918 | 1 day |
| 1930 | 33 days |
| 1931 | 51 days |
| 1932 | 154 days |
| 1933 | 147 days |
| 1934 | 109 days |
| 1935 | 118 days |
| 1936 | 144 days |
| 1937 | 76 days |
| 1938 | 154 days |
| 1939 | 113 days |
| 1940 | 93 days |
| 1941 | 142 days |
| 1942 | 104 days |
| 1943 | 172 days |
| 1944 | 141 days |
| 1945 | 163 days |
| 1946 | 59 days |
| 1947 | 123 days |
| 1948 | 133 days |
| 1949 | 72 days |
| 1950 | 172 days |
| 1951 | 158 days |
| 1952 | 100 days |
| 1953 | 133 days |
| 1954 | 143 days |
| 1955 | 188 days |
| 1956 | 69 days |
| 1957 | 128 days |
| 1958 | 106 days |
| 1959 | 144 days |
| 1960 | 134 days |
| 1961 | 119 days |
| 1962 | 164 days |
| 1963 | 123 days |
| 1964 | 82 days |
| 1965 | 111 days |
| 1966 | 53 days |
| 1967 | 120 days |
| 1968 | 91 days |
| 1969 | 173 days |
| 1970 | 132 days |
| 1971 | 89 days |
| 1972 | 109 days |
| 1973 | 176 days |
| 1974 | 111 days |
| 1975 | 59 days |
| 1976 | 124 days |
| 1977 | 78 days |
| 1978 | 135 days |
| 1979 | 89 days |
| 1980 | 101 days |
| 1981 | 129 days |
| 1982 | 78 days |
| 1983 | 138 days |
| 1984 | 132 days |
| 1985 | 49 days |
| 1986 | 134 days |
| 1987 | 177 days |
| 1988 | 150 days |
| 1989 | 115 days |
| 1990 | 117 days |
| 1991 | 45 days |
| 1992 | 72 days |
| 1993 | 131 days |
| 1994 | 128 days |
| 1995 | 170 days |
| 1996 | 163 days |
| 1997 | 50 days |
| 1998 | 146 days |
| 1999 | 97 days |
| 2000 | 54 days |
| 2001 | 102 days |
| 2002 | 132 days |
| 2003 | 183 days |
| 2004 | 171 days |
| 2005 | 75 days |
| 2006 | 132 days |
| 2007 | 142 days |
| 2008 | 69 days |
| 2009 | 102 days |
| 2010 | 148 days |
| 2011 | 94 days |
| 2012 | 139 days |
| 2013 | 166 days |
| 2014 | 152 days |
| 2015 | 144 days |
| 2016 | 174 days |
| 2017 | 132 days |
| 2018 | 218 days |
| 2019 | 188 days |
| 2020 | 159 days |
| 2021 | 215 days |
| 2022 | 151 days |
| 2023 | 170 days |
| 2024 | 190 days |
| 2025 | 100 days |
| 2026 | 136 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
63 years with a frostAcross 63 years with a frost, the median last spring frost at Redwood City falls on 8 February and the median first autumn frost on 4 December, which leaves a median of 300 days between them.
In 1970 to 2022 the median growing season was 314 days. That is 16 days more than in 1931 to 1966.
Fitted over all years, the growing season changes by +5.2 days per decade at this station.
| Measure | Median, all years | Earliest period (1931 to 1966) | Recent period (1970 to 2022) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 8 February | 16 February | 2 February | 14 days earlier | -3.5 days per decade |
| First autumn frost | 4 December | 30 November | 11 December | 11 days later | +1.7 days per decade |
| Growing days | 300 days | 298 days | 314 days | 16 days more | +5.2 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
88 years, 1931 to 2025A day with at least 47.6 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 132.7 mm (5.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 47.6 mm (1.9 in) | |
| 5 years | 67.5 mm (2.7 in) | |
| 10 years | 81.8 mm (3.2 in) | |
| 25 years | 101.2 mm (4.0 in) | |
| 50 years | 116.6 mm (4.6 in) | |
| 100 years | 132.7 mm (5.2 in) | Longer than the 88 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, 88 years of values from 1931 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: 124.0 mm (4.9 in) in 1962; 121.9 mm (4.8 in) in 1967; 113.5 mm (4.5 in) in 2022.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Redwood City, at 2016. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2016 ran 0.2 C (0.4 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2016 | -0.2 | -0.4 | possible | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Redwood City had a mean temperature of 15.6 C (60.0 F) and 425.2 mm (16.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Cachuma Lake (United States, 380 km away), King City (United States, 172 km away) and Ojai (United States, 432 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Cachuma Lake | United States | 380 km (236 mi) | 16.2 C (61.1 F) | 462.2 mm (18.2 in) | 0.85 |
| King City | United States | 172 km (107 mi) | 15.0 C (59.0 F) | 286.1 mm (11.3 in) | 0.86 |
| Ojai | United States | 432 km (268 mi) | 16.4 C (61.5 F) | 524.1 mm (20.6 in) | 1.08 |
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).