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Monthly Rainfall (Precipitation

Pasadena, California
1906-2022


Also see:
-- Historic Rainfall Seasons Against Average - Pasadena

-- Monthly Rainfall by Season - Downtown Los Angeles
-- Monthly Rainfall by Season - Burbank
-- Monthly Rainfall by Season - Hawthorne
-- Monthly Rainfall by Season - Lancaster
-- Monthly Rainfall by Season - Long Beach
-- Monthly Rainfall by Season - Los Angeles International Airport
-- Monthly Rainfall by Season - Palmdale
-- Monthly Rainfall by Season - Sandberg
-- Monthly Rainfall by Season - Santa Catalina Island
-- Monthly Rainfall by Season - Santa Clarita
-- Monthly Rainfall by Season - Santa Fe Dam (San Gabriel Valley)
-- Monthly Rainfall by Season - Santa Monica
-- Monthly Rainfall by Season - Van Nuys, Los Angeles
-- Monthly Rainfall by Season - Westwood, Los Angeles
-- Monthly Rainfall by Season - Whittier
-- Monthly Rainfall by Season - Woodland Hills, Los Angeles


Also see our current rainfall season page for this weather station.


Why our “Rainfall Season” is different than that of the National Weather Service


Quantity is measured in inches. T = Trace amount.

Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
Current Normals* 0.06 0.03 0.22 0.84 1.10 3.33 4.51 5.16 3.03 1.11 0.48 0.21 20.08
2022-2023 0.00 --- --- --- --- --- --- --- --- --- --- --- 0.00 (1)
2020-2021 0.00 0.00 0.00 0.00 0.07 1.30 0.71 2.03 1.55 0.09 0.12 0.01 5.88
2019-2020 0.01 0.00 0.01 0.00 2.55 6.82 0.12 1.46 4.36 4.88 0.42 0.04 20.67
2018-2019 0.00 0.00 0.00 0.39 2.00 2.68 6.77 11.08 2.58 0.18 1.41 0.11 27.20
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
2017-2018 0.00 0.05 0.08 0.03 0.04 0.00 2.84 0.25 4.24 0.01 0.50 0.00 8.04
2016-2017 0.00 0.00 0.01 0.36 1.22 4.38 9.24 4.63 0.23 0.05 1.01 0.00 21.13
2015-2016 0.64 0.00 1.90 1.03 0.19 1.09 3.35 1.66 3.65 0.61 0.61 0.01 14.74
2014-2015 0.00 0.03 0.54 0.00 0.10 7.66 1.51 1.53 1.67 0.03 1.19 0.06 14.32
2013-2014 0.00 0.00 0.03 0.17 1.08 0.94 0.01 3.65 1.75 0.39 0.00 0.01 8.03
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
2012-2013 0.01 0.02 0.00 0.47 1.11 3.38 1.86 0.71 1.36 0.00 0.08 0.01 9.01
2011-2012 0.00 0.01 0.00 1.68 2.55 1.17 1.27 0.74 2.64 3.14 0.18 0.00 13.38
2010-2011 0.00 0.00 0.00 1.85 0.86 15.10 0.99 4.35 4.49 0.00 0.53 0.18 28.35
2009-2010 0.00 0.00 0.00 1.32 0.00 5.50 8.19 6.40 1.24 2.42 0.04 0.00 25.11
2008-2009 0.00 0.00 0.03 0.07 3.55 3.77 0.82 6.91 0.73 0.09 0.00 0.15 16.12
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
2007-2008 0.05 0.03 1.58 0.57 0.82 3.03 13.79 1.66 0.11 0.03 0.73 0.00 22.40
2006-2007 0.00 0.01 0.00 0.03 0.10 0.32 0.55 2.40 0.12 0.59 0.05 0.00 4.17
2005-2006 0.00 0.02 0.35 0.77 0.17 0.75 3.67 4.01 2.22 4.45 0.98 0.04 17.43
2004-2005 0.00 0.00 0.00 8.77 1.60 9.54 15.89 15.45 2.94 1.43 0.00 0.00 55.62
2003-2004 0.04 0.00 0.00 0.60 1.14 2.15 0.26 8.21 1.27 0.52 0.00 0.01 14.20
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
2002-2003 0.00 0.03 0.63 0.00 2.50 2.92 0.00 7.04 4.03 1.26 1.04 0.53 19.98
2001-2002 0.08 0.00 0.00 0.06 2.60 1.26 1.88 0.41 0.43 0.15 0.25 0.12 7.24
2000-2001 0.00 0.04 0.38 1.29 0.00 T 5.06 8.43 1.31 2.13 0.00 0.00 18.64
1999-2000 0.02 0.00 0.00 0.00 0.43 0.35 1.08 9.70 3.42 2.71 0.17 0.00 17.88
1998-1999 0.00 0.48 0.04 0.00 1.52 0.53 2.26 1.02 1.48 2.88 0.17 1.18 11.56
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1997-1998 0.00 0.00 0.70 0.04 2.84 3.74 4.07 16.87 4.06 2.06 4.41 0.38 39.17
1996-1997 T 0.00 0.00 1.18 2.42 5.86 6.99 0.25 0.00 0.00 0.00 0.12 16.82
1995-1996 0.01 0.00 0.01 0.00 0.07 2.48 3.20 8.38 2.97 0.68 0.03 0.00 17.83
1994-1995 0.00 0.00 0.00 0.72 0.63 1.00 18.46 2.18 9.89 1.50 0.18 1.93 36.49
1993-1994 0.00 0.00 0.00 0.19 1.17 1.35 0.40 4.25 2.19 0.96 0.39 0.05 10.95
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1992-1993 0.82 0.00 0.00 1.67 0.00 6.45 15.99 9.19 4.11 0.00 0.02 1.25 39.50
1991-1992 0.21 0.08 0.15 1.17 0.05 3.68 2.73 12.47 9.14 0.32 0.14 0.04 30.18
1990-1991 0.00 0.15 0.08 T 0.74 0.09 2.02 5.30 10.01 0.05 0.04 0.00 18.48
1989-1990 0.00 0.00 0.96 0.55 0.44 0.00 2.83 4.35 0.34 1.19 1.47 T 12.13
1988-1989 0.00 0.06 0.07 0.00 1.76 4.91 1.05 2.45 1.19 0.06 0.17 0.06 11.78
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1987-1988 0.19 0.10 0.17 3.34 2.50 2.79 2.61 2.17 0.95 3.19 0.06 0.00 18.07
1986-1987 0.11 0.00 1.98 1.61 1.33 0.48 2.22 1.91 1.54 0.35 0.08 0.11 11.72
1985-1986 0.00 0.00 0.15 0.75 4.28 0.22 3.59 5.77 6.91 0.65 0.00 T 22.32
1984-1985 0.00 0.64 0.72 0.09 3.14 7.74 0.96 1.89 1.43 0.00 0.31 0.00 16.92
1983-1984 0.00 1.92 2.18 1.27 2.89 4.42 0.20 0.00 0.49 0.49 0.00 0.16 14.02
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1982-1983 0.00 0.00 1.99 0.45 3.80 1.59 8.86 6.19 12.60 7.77 0.29 0.08 43.62
1981-1982 0.00 0.00 0.08 0.66 2.49 0.77 3.40 0.77 6.73 3.00 0.42 0.21 18.53
1980-1981 0.04 0.00 T 0.01 0.00 1.00 3.23 1.42 5.26 0.71 0.03 0.02 11.72
1979-1980 0.00 T 0.00 0.92 0.30 0.88 11.10 19.70 5.62 0.60 0.47 0.00 39.59
1978-1979 0.00 0.00 0.77 0.19 2.19 1.99 7.74 4.26 ---(2) 0.02 0.03 0.09 17.28(3)
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1977-1978 0.00 2.27 T 0.02 0.13 5.85 8.99 9.37 12.86 ---(2) 0.09 T 39.58(3)
1976-1977 0.03 0.24 3.93 1.44 0.83 0.75 4.46 0.24 1.96 T 3.68 0.01 17.57
1975-1976 0.00 0.00 0.01 0.38 0.11 0.53 0.00 4.80 2.33 1.15 0.12 0.15 9.58
1974-1975 0.01 0.00 T 0.92 0.02 3.99 0.10 2.62 5.97 1.68 0.15 0.03 15.49
1973-1974 0.00 0.03 T 0.26 ---(2) 0.66 10.49 0.10 4.61 0.40 0.09 0.01 16.65
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1972-1973 0.00 0.39 0.03 0.25 3.53 2.25 4.09 11.15 4.34 0.03 0.07 0.06 26.19
1971-1972 T T 0.00 0.23 0.35 7.05 0.01 0.05 0.00 0.19 0.02 0.44 8.34
1970-1971 0.00 0.00 0.00 0.03 6.54 5.48 1.39 1.10 0.78 0.46 0.50 0.05 16.33
1969-1970 0.01 0.00 T T 1.41 0.11 1.77 4.52 3.51 0.05 T 0.05 11.43
1968-1969 0.01 0.00 0.00 0.35 0.43 0.91 16.74 11.30 1.82 0.84 0.14 0.22 32.76
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1967-1968 0.00 0.00 0.27 0.00 8.43 1.51 1.01 0.97 3.33 0.63 0.11 0.07 16.33
1966-1967 0.00 0.00 0.42 0.05 3.76 6.25 6.59 0.12 3.66 5.04 0.18 0.13 26.20
1965-1966 0.07 0.07 1.24 0.00 13.74 6.75 0.92 1.42 0.65 0.03 0.25 0.00 25.14
1964-1965 0.00 0.00 T 0.47 2.75 1.82 0.86 0.48 1.47 6.83 0.15 0.09 14.92
1963-1964 0.00 T 1.51 0.99 2.44 0.02 2.70 0.04 2.43 1.56 0.03 0.30 12.02
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1962-1963 0.00 0.00 0.00 0.19 T 0.05 0.48 4.84 2.35 1.91 T 0.36 10.18
1961-1962 0.00 0.06 0.04 0.00 1.12 2.66 3.42 13.14 1.69 T 0.73 0.03 22.89
1960-1961 0.00 0.00 0.00 0.11 4.07 0.16 1.51 T 0.88 0.45 T 0.00 7.18
1959-1960 T 0.00 T T 0.05 1.63 3.03 2.25 0.56 1.76 0.04 0.01 9.33
1958-1959 0.00 0.20 0.10 1.02 0.12 T 2.84 5.30 0.00 0.65 T 0.03 10.26
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1957-1958 T 0.00 0.00 1.97 0.69 3.76 2.56 10.05 5.93 5.62 T 0.00 30.58
1956-1957 0.00 0.01 0.00 0.62 0.00 0.31 6.00 3.12 1.89 2.08 1.43 0.18 15.64
1955-1956 0.00 0.05 T 0.00 1.81 1.65 9.05 1.21 0.00 4.03 0.90 0.00 18.70
1954-1955 T T T T 2.16 1.17 5.75 1.29 1.51 1.63 2.42 0.07 16.00
1953-1954 T 0.00 0.00 T 1.36 0.34 6.67 3.17 4.40 0.28 0.07 0.18 16.47
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1952-1953 0.00 T 0.13 T 5.15 4.57 1.53 0.30 0.99 1.22 0.02 0.07 13.98
1951-1952 T 0.21 0.00 0.67 1.93 6.74 14.96 0.66 8.53 3.13 0.00 T 36.83
1950-1951 0.13 0.00 0.82 0.48 1.72 0.03 3.74 1.32 1.02 2.35 0.19 T 11.80
1949-1950 0.00 T T 0.07 2.55 4.27 3.18 2.42 1.29 0.69 0.14 0.12 14.73
1948-1949 0.00 0.00 0.00 0.60 0.00 3.04 3.52 1.68 1.71 0.08 1.19 T 11.82
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1947-1948 0.00 0.10 0.16 0.15 0.27 1.81 0.01 2.08 3.63 2.06 0.02 0.50 10.79
1946-1947 T 0.00 0.01 1.51 10.25 5.79 0.46 0.63 0.96 0.29 0.48 0.06 20.44
1945-1946 T 0.50 T 0.69 0.24 7.02 0.24 2.27 5.28 0.65 0.10 T 16.99
1944-1945 0.00 T 0.03 0.03 5.47 1.18 0.06 5.09 4.04 0.35 T 0.15 16.40
1943-1944 0.00 0.00 0.01 0.40 0.05 7.90 0.90 10.85 3.72 1.31 T 0.30 25.44
Season Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Season Total
1942-1943 0.00 0.51 T 1.14 0.41 1.26 16.43 5.51 6.76 1.23 0.03 0.05 33.33
1941-1942 0.02 0.07 T 1.73 0.16 6.42 0.45 1.12 1.69 3.03 0.02 T 14.71
1940-1941 0.00 0.00 T 1.96 0.62 7.72 2.66 16.77 11.43 5.08 0.06 0.02 46.32
1939-1940 0.00 0.00 5.88 0.45 0.15 0.69 5.76 6.05 1.50 2.12 0.01 0.00 22.61

* Normals, reissued every ten years, were updated on May 4, 2021. The latest normals are National Centers For Environmental Information data, used by the National Weather Service, based upon an average over 30-years, covering 1991 through 2020.

† Complete data are not yet available for this month. Data for this station typically lags for up to six weeks. An update will be made upon release of all data for the month.
(1) Seasonal rainfall through latest full month.
(2) At least 26 days or more of data were missing for this month.
(3) Due to one or more months of missing data this season, accumulated numbers cannot fairly reflect a complete season total.

Source: Western Regional Climate Center