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Monsoon statistics for Tucson (1895-2008)

Top 10 Wettest Monsoon		Top 10 Driest Monsoon
1) 13.84"/1964	6) 10.20"/2006	1) 1.59"/1924	6) 2.50"/1902
2) 13.08"/1955	7) 9.94"/1984	2) 2.33"/1973	7) 2.58"/1994
3) 11.04"/1921	8) 9.85"/1990	3) 2.40"/1989	8) 2.75"/1913
4) 10.50"/1983	9) 9.43"/1966	4) 2.42"/2004	9) 2.79"/1918
5) 10.21"/1919	10) 8.54"/1954	5) 2.45"/1900	10) 2.81"/2001

YEAR

Month by month rainfall (thru July 17th)

June (15-30)

July

August

September

Total

AVG

0.24"

2.07"

2.30"

1.45"

6.06"

2008

0.16"

2.43"

???

2.59"

2007

0.00"

5.22"

0.90"

0.45"

6.57"

2006

0.19"

5.40"

3.01"

1.60"

10.20"

2005

0.01"

0.72"

4.52"

0.05"

5.30"

2004

0.00"

0.86"

0.95"

0.61"

2.42"

2003

0.00"

2.50"

2.04"

2.16"

6.70"

2002

0.00"

2.47"

1.63"

1.69"

5.79"

2001

0.54"

1.09"

0.85"

0.33"

2.81"

2000

1.56"

1.59"

1.70"

0.02"

4.87"

1999

0.16"

4.15"

3.05"

0.97"

8.33"

1998

0.00"

4.06"

1.70"

1.10"

6.86"

1997

0.00"

0.51"

2.32"

1.43"

4.26"

1996

0.00"

1.88"

1.87"

3.68"

7.43"

1995

0.00"

0.04"

3.71"

2.29"

6.04"

1994

0.26"

0.41"

0.45"

1.46"

2.58"

1993

0.02"

0.26"

4.93"

0.46"

5.67"

1992

0.00"

0.93"

4.55"

0.94"

6.42"

1991

0.00"

0.44"

2.17"

1.54"

4.15"

1990

0.07"

5.45"

2.70"

1.63"

9.85"

1989

0.06"

1.42"

0.90"

0.02"

2.40"

1988

0.15"

1.69"

3.64"

0.80"

6.28"

1987

0.00"

0.37"

2.79"

2.30"

5.46"

1986

0.01"

1.82"

3.56"

0.31"

5.70"

1985

0.02"

3.14"

1.97"

1.13"

6.26"

1984

1.02'

2.92"

4.19"

1.81"

9.94"

1983

0.00"

1.98"

4.24"

4.28"

10.50"

1982

0.13"

2.13"

2.51"

2.69"

7.46"

1981

0.16"

6.17"

0.80"

1.10"

8.23"

1980

0.23"

1.78"

1.95"

2.93"

6.89"

1979

0.03"

2.04"

2.60"

0.02"

4.69"

1978

0.22"

0.78"

1.59"

1.66"

4.25"

1977

0.06"

0.76"

0.80"

1.41"

3.03"

1976

0.10"

1.18"

0.23"

1.68"

3.19"

1975

0.00"

2.38"

0.32"

1.26"

3.96"

1974

0.01'

4.44"

1.04"

1.69"

7.18"

1973

0.05"

1.74"

0.54"

Trace

2.33"

1972

0.50"

3.49"

2.93"

1.09'

8.01"

1971

0.00"

2.18"

3.29"

1.75"

7.22"

1970

0.33"

2.53"

1.43"

3.58"

7.87"

1969

0.00"

1.51"

2.57"

1.31"

5.39"

1968

0.00"

1.97"

1.12"

Trace

3.09"

1967

0.36"

2.72"

2.00"

1.35"

6.43"

1966

0.02"

2.57"

3.31"

3.53"

9.43"

1965

0.00"

2.13"

1.12"

0.82"

4.07"

1964

0.01"

4.82"

3.90"

5.11"

13.84"

1963

0.00"

1.66"

2.86"

1.45"

5.97"

1962

0.25"

1.38"

0.48"

2.86"

4.97"

1961

0.26"

1.81"

4.28"

0.51"

6.86"

1960

0.00"

0.73"

2.09"

1.20"

4.02"

1959

0.00"

3.92"

2.79"

Trace

6.71"

1958

0.51"

5.20"

0.91"

0.21"

6.83"

1957

0.09"

1.25"

3.92"

Trace

5.26"

1956

0.36"

2.77"

1.12"

0.37"

4.62"

1955

0.00"

5.10"

7.93"

0.05"

13.08"

1954

1.46"

2.03"

2.00"

3.05"

8.54"

1953

0.00"

2.87"

0.46"

Trace

3.33"

1952

0.00"

3.25"

1.56"

0.80"

5.61"

1951

0.00"

1.49"

2.66"

0.34"

4.49"

1950

1.24"

3.72"

0.86"

1.15"

6.97"

1949

0.02"

1.42"

1.92"

0.81"

4.17"

1948

Trace

3.02"

1.08"

1.11"

5.21"

1947

0.05"

0.27"

2.24"

0.47"

3.03"

1946

0.04"

2.44"

3.61"

2.26"

8.35"

1945

0.00"

2.84"

4.31"

0.14"

7.29"

1944

0.04"

1.77"

1.78"

2.08"

5.67"

1943

0.05"

1.09"

3.04"

3.59"

7.77"

1942

0.00"

0.68"

0.90"

1.78"

3.36"

1941

Trace

2.51"

1.99"

1.20"

5.70"

1940

1.14"

0.84"

2.84"

2.72"

7.54"

1939

Trace

0.61"

1.24"

1.53"

3.38"

1938

2.07"

0.78"

2.37"

0.50"

5.72"

1937

Trace

2.06"

1.29"

1.43"

4.78"

1936

0.06"

2.82"

3.03"

1.51"

7.42"

1935

Trace

0.87"

5.61"

0.88"

7.36"

1934

0.14"

1.16"

2.41"

1.07"

4.78"

1933

0.10"

1.60"

2.23"

1.62"

5.55"

1932

0.13"

2.58"

1.61"

0.23"

4.55"

1931

0.48"

1.07"

3.96"

0.94"

6.45"

1930

1.12"

1.03"

1.47"

0.37"

3.99"

1929

0.10"

1.94"

1.62"

4.28"

7.94"

1928

0.09"

1.78"

2.28"

0.36"

4.51"

1927

0.04"

1.33"

1.51"

2.34"

5.22"

1926

0.01"

0.70"

0.10"

2.82"

3.63"

1925

0.86"

1.20"

1.52"

2.96"

6.53"

1924

0.17"

1.15"

0.08"

0.19"

1.59"

1923

0.00"

3.00"

4.06"

0.23"

7.29"

1922

0.44"

1.73"

1.18"

1.73"

5.08"

1921

0.00"

6.24"

1.79"

3.01"

11.04"

1920

0.34"

0.25"

2.84"

0.74"

4.17"

1919

0.32"

5.53"

1.82"

2.54"

10.21"

1918

0.34"

1.54"

0.78"

0.13"

2.79"

1917

0.00"

3.90"

2.31"

0.88"

7.09"

1916

0.07"

2.03"

2.26"

1.29"

5.65"

1915

0.00"

2.39"

1.51"

0.92"

4.82"

1914

0.44"

2.94"

3.45"

0.40"

7.23"

1913

0.08"

1.32"

1.21"

0.14"

2.75"

1912

0.55"

3.00"

0.96"

0.01"

4.52"

1911

Trace

1.57"

2.06"

2.65"

6.28"

1910

0.12"

4.21"

2.55"

0.30"

7.18"

1909

0.54"

4.04"

1.36"

1.25"

7.19"

1908

Trace

4.77"

2.18"

0.55"

7.50"

1907

Trace

4.27"

3.46"

0.80"

8.53"

1906

0.00"

1.82"

2.53"

0.43"

4.78"

1905

0.01"

1.10"

0.56"

2.84"

4.51"

1904

0.18"

1.75"

2.65"

0.89"

5.47"

1903

0.00"

1.52"

2.67"

1.17"

5.36"

1902

0.19"

0.42"

1.31"

0.58"

2.50"

1901

0.00"

2.57"

1.99"

0.28"

4.84"

1900

0.00"

0.65"

0.95"

0.85"

2.45"

1899

0.68"

1.87"

1.82"

0.03"

4.40"

1898

0.20"

3.22"

3.94"

0.10"

7.46"

1897

0.00"

1.98"

3.43"

2.71"

8.12"

1896

0.19"

3.45"

1.25"

1.13"

6.02"

1895

0.01"

0.11"

4.48"

0.75"

5.35"

Tucson Monsoon start date occurrences by date (1949-2007)
The monsoon start date is determined when the average daily
dewpoint is 54 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

1967

June 19

1994, 1958

June 20

1972

June 21

1950

June 22

June 23

June 24

1954

June 25

1984, 1981

June 26

1999

June 27

1978, 1962

June 28

2006, 1976, 1966, 1959, 1956

June 29

1990, 1986

June 30

1996, 1993, 1980

July 1

1974, 1970, 1961, 1949

July 2

1977, 1975

July 3

2001, 1998, 1971, 1968, 1963, 1960

July 4

1991, 1973, 1953, 1952

July 5

July 6

1992, 1982

July 7

1988, 1983, 1965, 1957

July 8

2007, 2004, 1989, 1969, 1964