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Monsoon statistics for Phoenix (1896-2008)

Top 10 Wettest Monsoon		Top 10 Driest Monsoon
1) 9.56"/1984	6) 6.96"/1951	1) 0.35"/1924	6) 0.78"/1980
2) 9.31"/1911	7) 6.15"/1943	2) 0.51"/1914	7) 0.79"/1910
3) 7.45"/1946	8) 6.03"/1897	3T) 0.61"/1993	8T) 0.86"/1962
4) 7.30"/1939	9) 5.99"/1955	3T) 0.61"/1932	8T) 0.86"/1944
5) 7.20"/1896	10) 5.70"/2008***	5) 0.74"/2007	10) 1.01"/1977

YEAR

Month by month rainfall (thru September 4th)

June (15-30)

July

August

September

Total

AVG

0.09"

0.99"

0.94"

0.75"

2.77"

2008

Trace

2.15"

3.55"

0.00"

5.70"

2007

0.00"

0.36"

0.31"

0.07"

0.74"

2006

0.00"

1.29"

1.26"

0.78"

3.33"

2005

Trace

0.16"

1.21"

0.16"

1.53"

2004

0.00"

0.59"

0.36"

0.15"

1.10"

2003

0.00"

0.61"

0.51"

0.25"

1.37"

2002

Trace

1.18"

Trace

0.50"

1.68"

2001

0.01"

0.67"

0.46"

0.00"

1.14"

2000

0.34"

0.28"

0.58"

0.01"

1.21"

1999

0.00"

2.96"

0.92"

1.31"

5.19"

1998

0.00"

1.94"

1.05"

0.58"

3.57"

1997

0.00"

0.17"

1.39"

0.45"

2.01"

1996

0.00"

1.04"

0.34"

0.54"

1.92"

1995

Trace

3.50"

1.08"

4.58"

1994

Trace

0.25"

0.02"

1.74"

2.01"

1993

0.00"

Trace

0.55"

0.06"

0.61"

1992

0.00"

2.95"

1.30"

0.03"

4.28"

1991

0.00"

0.14"

0.12"

0.81"

1.07"

1990

0.00"

1.05"

2.70"

1.11"

4.86"

1989

0.00"

0.13"

1.11"

0.47"

1.71"

1988

0.02"

0.87"

0.63"

0.00"

1.52"

1987

0.00"

1.08"

0.45"

0.57"

2.10"

1986

0.01"

1.19"

1.27"

0.47"

2.94"

1985

0.00"

0.98"

0.21"

1.60"

2.79"

1984

0.18"

5.15"

0.87"

3.36"

9.56"

1983

0.00"

0.38"

2.48"

2.43"

5.29"

1982

Trace

0.43"

1.97"

0.12"

2.52"

1981

Trace

1.14"

0.11"

0.18"

1.43"

1980

0.03"

0.56"

0.06"

0.13"

0.78"

1979

Trace

0.34"

1.18"

0.09"

1.61"

1978

0.01"

1.44"

1.79"

Trace

3.24"

1977

0.00"

0.30"

0.18"

0.53"

1.01"

1976

0.09"

1.48"

0.12"

1.69"

3.38"

1975

0.00"

0.38"

Trace

0.82"

1.20"

1974

0.00"

0.84"

1.15"

1.07"

3.06"

1973

0.00"

1.30"

Trace

0.00"

1.30"

1972

1.64"

0.72"

1.20"

0.28"

3.84"

1971

0.00"

0.24"

0.99"

0.92"

2.15"

1970

0.00"

0.48"

1.02"

2.85"

4.35"

1969

0.00"

0.28"

0.14"

2.11"

2.53"

1968

0.00"

1.70"

0.59"

0.00"

2.29"

1967

0.44"

0.99"

0.02"

0.13"

1.58"

1966

0.22"

0.09"

2.17"

2.00"

4.48"

1965

0.91"

0.16"

0.18"

0.60"

1.85"

1964

0.00"

0.60"

1.29"

1.80"

3.69"

1963

0.00"

0.03"

2.68"

Trace

2.71"

1962

0.12"

0.10"

0.25"

0.39"

0.86"

1961

Trace

0.40"

2.11"

0.22"

2.73"

1960

0.00"

0.25"

0.82"

0.12"

1.19"

1959

Trace

0.45"

1.36"

0.04"

1.85"

1958

0.05"

0.31"

0.72"

2.25"

3.33"

1957

Trace

0.72"

0.85"

0.00"

1.57"

1956

0.01"

0.92"

0.46"

0.02"

1.41"

1955

0.00"

4.19"

1.80"

Trace

5.99"

1954

0.02"

0.36"

0.55"

0.44"

1.37"

1953

0.00"

0.74"

0.53"

0.00"

1.27"

1952

0.00"

1.46"

1.41"

0.06"

2.93"

1951

Trace

1.30"

5.33"

0.33"

6.96"

1950

0.10"

0.93"

0.45"

0.87"

2.35"

1949

0.14"

0.36"

0.41"

0.89"

1.80"

1948

0.00"

0.79"

0.25"

Trace

1.04"

1947

0.00"

0.13"

1.21"

0.39"

1.73"

1946

0.00"

2.56"

2.01"

2.88"

7.45"

1945

0.00"

0.93"

0.41"

Trace

1.34"

1944

0.00"

0.70"

0.09"

0.07"

0.86"

1943

0.01"

0.25"

4.92"

0.97"

6.15"

1942

0.00"

1.24"

1.10"

0.21"

2.55"

1941

Trace

1.39"

0.85"

1.79"

4.03"

1940

Trace

0.66"

0.48"

1.43"

2.57"

1939

0.00"

0.71"

1.18"

5.41"

7.30"

1938

0.28"

0.25"

0.97"

Trace

1.50"

1937

Trace

0.49"

0.05"

1.17"

1.71"

1936

Trace

2.49"

0.32"

0.43"

3.24"

1935

0.00"

0.93"

1.27"

1.30"

3.50"

1934

0.03"

0.11"

1.07"

0.66"

1.87"

1933

0.21"

0.30"

0.38"

1.62"

2.51"

1932

0.06"

0.11"

0.10"

0.34"

0.61"

1931

Trace

0.02"

1.70"

0.23"

1.95"

1930

0.16"

0.68"

0.59"

0.51"

1.94"

1929

Trace

0.79"

2.09"

0.19"

3.07"

1928

0.00"

0.11"

1.47"

0.44"

2.02"

1927

0.07"

0.24"

0.69"

0.83"

1.83"

1926

Trace

1.31"

0.11"

3.52"

4.94"

1925

0.21"

0.03"

0.61"

0.95"

1.80"

1924

Trace

0.09"

0.14"

0.12"

0.35"

1923

0.00"

0.77"

0.65"

0.97"

2.39"

1922

Trace

0.74"

0.58"

0.13"

1.45"

1921

0.00"

0.38"

1.62"

0.33"

2.33"

1920

Trace

0.25"

0.75"

0.10"

1.10"

1919

Trace

1.05"

2.40"

1.93"

5.38"

1918

0.08"

1.02"

3.47"

0.39"

4.96"

1917

0.00"

3.97"

0.11"

0.55"

4.63"

1916

0.00"

0.77"

0.30"

1.66"

2.73"

1915

0.00"

1.12"

0.25"

0.10"

1.47"

1914

Trace

0.21"

0.30"

Trace

0.51"

1913

0.00"

0.94"

0.32"

0.13"

1.39"

1912

Trace

1.29"

0.72"

0.14"

2.15"

1911

Trace

6.47"

1.68"

1.16"

9.31"

1910

Trace

0.65"

0.14"

Trace

0.79"

1909

Trace

1.00"

1.94"

0.42"

3.36"

1908

0.00"

2.98"

0.81"

0.51"

4.30"

1907

Trace

2.18"

0.80"

0.02"

3.00"

1906

Trace

0.20"

2.07"

Trace

2.27"

1905

Trace

0.28"

0.92"

1.23"

2.43"

1904

Trace

1.89"

1.61"

1.23"

4.73"

1903

0.00"

0.70"

3.16"

4.56"

1902

0.12"

0.32"

0.56"

1.46"

2.46"

1901

0.00"

0.35"

1.73"

Trace

2.08"

1900

0.00"

1.70"

0.01"

0.12"

1.83"

1899

0.61"

0.87"

0.89"

0.37"

2.74"

1898

0.01"

0.24"

1.03"

0.04"

1.32"

1897

0.00"

0.59"

1.77"

3.67"

6.03"

1896

Trace

4.25"

1.77"

1.18"

7.20"

Phoenix Monsoon start date occurrences by date (1948-2007)
The monsoon start date is determined when the average daily
dewpoint is 55 degrees or greater for "3" consecutive days.
The start date is the first of the "3" consecutive days.

Dates

# occurrences

Year(s)

June 17

2000

June 18

June 19

1958

June 20

June 21

2001

June 22

June 23

1954

June 24

June 25

1999, 1984

June 26

June 27

1966, 1962

June 28

1959

June 29

1990, 1986

June 30

1996

July 1

1993, 1977, 1949

July 2

2006, 1961

July 3

1975, 1973, 1968, 1967, 1957, 1952

July 4

1998, 1991, 1953, 1950

July 5

July 6

1992, 1982, 1981

July 7

1988, 1983, 1964

July 8

1989

July 9

2002, 1985, 1978, 1976, 1965

July 10

1956

July 11

1995, 1969, 1955, 1951

July 12

2004

July 13

1972, 1971

July 14

1974