Rainfall in the San Jacinto valley
Short-term or numeric observations may only show semi-random year to year fluctuations. Long-term, multiple decade graphic representations reveal several trends. 1) A long term increase in rainfall, 2) A cyclic wave pattern of increasing levels of rainfall over the years, 3) More erratic semi-random fluctuations and 4) A progressive decline in rainfall during the months of November and December over the 4 decades of the 1960's, 70's, 80's and 90's, along with a more significant increase in rainfall after December through June. Monthly totals are based on rainfall data recorded in inches at 8 AM daily, and beginning the year on October 1.
|
Oct |
Nov |
Dec |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Total |
|
|
2000-2001 |
0.88 |
0.12 |
0 |
2.11 |
3.19 |
0.87 |
. |
. |
. |
. |
. |
. |
7.17 |
|
1999-2000 |
0 |
0.01 |
0.41 |
0.21 |
3.5 |
1.61 |
0.55 |
0 |
0 |
0 |
0.13 |
0.32 |
6.74 |
|
1998-1999 |
0.3 |
0.75 |
0.46 |
0.92 |
0.84 |
0.06 |
2.4 |
0 |
0.23 |
0.8 |
0.02 |
0.22 |
7 |
|
1997-1998 |
0.02 |
1.21 |
1.62 |
2.49 |
9.66 |
1.36 |
1.35 |
4.28 |
0 |
0 |
2.19 |
0.14 |
24.32 |
|
1996-1997 |
1 |
1.75 |
1.54 |
3.46 |
0.28 |
0 |
0.08 |
0 |
0 |
0 |
0 |
3.03 |
11.14 |
|
1995-1996 |
0 |
0.04 |
0.18 |
2.25 |
3.2 |
1.17 |
0.3 |
0 |
0 |
0 |
0 |
0 |
7.14 |
|
1994-1995 |
0.52 |
0.63 |
0.8 |
7.44 |
1.68 |
4.64 |
1.03 |
0.8 |
0.23 |
0.14 |
0 |
0.77 |
18.68 |
|
1993-1994 |
0.38 |
0.62 |
0.33 |
1.02 |
3.7 |
1.8 |
0.92 |
0.1 |
0 |
0 |
0.4 |
0 |
9.27 |
|
1992-1993 |
0.71 |
0 |
2.9 |
13.4 |
5.45 |
1.4 |
0 |
0 |
0.71 |
0 |
0 |
0 |
24.57 |
|
1991-1992 |
0.35 |
0.03 |
1.82 |
2.28 |
4.37 |
2.86 |
0.11 |
1.93 |
0 |
0.14 |
1.92 |
0 |
15.81 |
|
1990-1991 |
0 |
0.49 |
0.08 |
1.1 |
2.45 |
8.35 |
0 |
0 |
0 |
0.14 |
0 |
0.43 |
13.04 |
|
1989-1990 |
0.33 |
0.04 |
0.19 |
3.31 |
1.33 |
0.35 |
1.42 |
0.78 |
0.6 |
0.34 |
0.72 |
0 |
9.41 |
|
1988-1989 |
0 |
0.73 |
1.53 |
1.09 |
0.7 |
1.07 |
0 |
0.19 |
0 |
0 |
0 |
0.51 |
5.82 |
|
1987-1988 |
2.59 |
1.69 |
1.67 |
1.7 |
0.84 |
0.31 |
2.45 |
0.05 |
0 |
0.03 |
1.04 |
0 |
12.37 |
|
1986-1987 |
0.4 |
0.92 |
0.74 |
1.57 |
1.63 |
1.44 |
0.05 |
0.03 |
0 |
0.01 |
0.03 |
0.05 |
6.87 |
|
1985-1986 |
0.12 |
3 |
0.54 |
1.03 |
2.68 |
3.98 |
0.36 |
0 |
0 |
0.24 |
0 |
0.26 |
12.21 |
|
1984-1985 |
0.23 |
0.62 |
4.12 |
0.89 |
1.4 |
0.54 |
0 |
0 |
0 |
0.42 |
0 |
0.9 |
9.12 |
|
1983-1984 |
0.58 |
1.68 |
2.34 |
0.04 |
0 |
0 |
0.57 |
0 |
0.06 |
1.48 |
0.08 |
1.58 |
8.41 |
|
1982-1983 |
0.27 |
2.29 |
1.22 |
2.54 |
3.17 |
5.73 |
2.73 |
0.83 |
0 |
0 |
1.24 |
0.29 |
20.31 |
|
1981-1982 |
0.05 |
0.71 |
0.34 |
4.01 |
1.13 |
4.43 |
1.11 |
0.09 |
0 |
0 |
1.15 |
1.2 |
14.22 |
|
1980-1981 |
0 |
0 |
0.35 |
2.03 |
2.03 |
2.59 |
0.43 |
0.02 |
0 |
0 |
0 |
0.21 |
7.63 |
|
1979-1980 |
0.78 |
0.3 |
0.33 |
6.37 |
8.25 |
2.99 |
0.8 |
0.1 |
0 |
0 |
0 |
0 |
19.92 |
|
1978-1979 |
0.19 |
2.82 |
2.72 |
5.43 |
2.81 |
3.44 |
0 |
0.06 |
0 |
0.29 |
0.03 |
0 |
17.79 |
|
1977-1978 |
0 |
0 |
3.15 |
7.93 |
4.32 |
6.53 |
1.38 |
0.02 |
0 |
0 |
0.01 |
0.68 |
24.02 |
|
1976-1977 |
1.77 |
0.65 |
0.75 |
1.96 |
0.61 |
1.38 |
0.14 |
2.97 |
0.19 |
0 |
2.08 |
0 |
12.5 |
|
1975-1976 |
0.1 |
1.19 |
0.41 |
0 |
3.98 |
2.32 |
1.36 |
0.55 |
0.14 |
0.14 |
0 |
4.65 |
14.84 |
|
1974-1975 |
0.76 |
0.08 |
1.51 |
0.14 |
1.38 |
3.4 |
2.3 |
0.11 |
0 |
0 |
0 |
0 |
9.68 |
|
1973-1974 |
0.04 |
1.63 |
0.15 |
5.18 |
0.05 |
1.91 |
0.22 |
0 |
0 |
1.05 |
0 |
0 |
10.23 |
|
1972-1973 |
0.6 |
2 |
1.14 |
2.04 |
3.75 |
3.86 |
0.05 |
0 |
0 |
0 |
0 |
0 |
13.44 |
|
1971-1972 |
1.2 |
0.04 |
4.1 |
0 |
0.45 |
0 |
0.13 |
0.08 |
1.13 |
0 |
0.28 |
0.12 |
7.52 |
|
1970-1971 |
0.05 |
2.1 |
2.73 |
0.73 |
0.26 |
0.13 |
0.35 |
0.86 |
0.04 |
0 |
0 |
0 |
7.25 |
|
1969-1970 |
0 |
0.91 |
0.05 |
1.07 |
1.08 |
4.6 |
0.3 |
0 |
0 |
0 |
0.34 |
0 |
8.35 |
|
1968-1969 |
0.23 |
0.83 |
1 |
6.15 |
6.61 |
0.83 |
0.3 |
0.52 |
0 |
0 |
0 |
0.12 |
16.59 |
|
1967-1968 |
0 |
1.65 |
2.4 |
0.63 |
0.39 |
0.91 |
0.89 |
0.11 |
0 |
0.65 |
0 |
0 |
7.63 |
|
1966-1967 |
0.55 |
0.79 |
5.61 |
2.2 |
0 |
0.95 |
3.09 |
0.14 |
0.06 |
0.15 |
0.93 |
2.5 |
16.97 |
|
1965-1966 |
0 |
6.09 |
3.3 |
0.63 |
1.15 |
0.49 |
0.14 |
0 |
0 |
0 |
0 |
0 |
11.8 |
|
1964-1965 |
0.07 |
1.61 |
0.72 |
0.46 |
0.4 |
1.7 |
4.14 |
0.11 |
0.01 |
0.37 |
0.3 |
0.49 |
10.38 |
|
1963-1964 |
0.84 |
2 |
0 |
1.44 |
0.4 |
1.83 |
1.73 |
0.35 |
0 |
0 |
0 |
0.03 |
8.62 |
|
1962-1963 |
0.11 |
0 |
0.12 |
0.15 |
3.07 |
1.63 |
1.57 |
0 |
0.05 |
0 |
0.1 |
3.44 |
10.24 |
|
1961-1962 |
0.06 |
0.71 |
1.55 |
1.86 |
3.76 |
1.42 |
0 |
0.68 |
0.02 |
0 |
0 |
0 |
10.06 |
|
1960-1961 |
0.47 |
1.55 |
0.03 |
0.7 |
0.23 |
0.61 |
0.03 |
0 |
0 |
0 |
1.18 |
0 |
4.8 |
|
1959-1960 |
0.25 |
1.05 |
2.37 |
2.16 |
1.65 |
0.37 |
0.59 |
0.02 |
0 |
0 |
0 |
0.28 |
8.74 |
|
Averages: |
0.4 |
1.0793 |
1.3648 |
2.4314 |
2.3293 |
2.0443 |
0.8421 |
0.3757 |
0.0826 |
0.1521 |
0.3374 |
0.529 |
11.967 |
|
Maximum: |
2.59 |
6.09 |
5.61 |
13.4 |
9.66 |
8.35 |
4.14 |
4.28 |
1.13 |
1.48 |
2.19 |
4.65 |
24.57 |
|
Minimum: |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
4.8 |
|
Oct |
Nov |
Dec |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Total |
|
|
Avg 89-99 |
0.361 |
0.556 |
0.992 |
3.767 |
3.296 |
2.199 |
0.761 |
0.789 |
0.177 |
0.156 |
0.525 |
0.459 |
14.038 |
|
Avg 79-89 |
0.502 |
1.194 |
1.318 |
2.127 |
2.183 |
2.308 |
0.85 |
0.131 |
0.006 |
0.218 |
0.354 |
0.5 |
11.688 |
|
Avg 69-79 |
0.471 |
1.142 |
1.671 |
2.448 |
1.869 |
2.757 |
0.623 |
0.465 |
0.15 |
0.148 |
0.274 |
0.545 |
12.562 |
|
Avg 59-69 |
0.258 |
1.628 |
1.71 |
1.638 |
1.766 |
1.074 |
1.248 |
0.193 |
0.014 |
0.117 |
0.251 |
0.686 |
10.583 |
|
Avg 59-01 |
0.4 |
1.0793 |
1.3648 |
2.4314 |
2.3293 |
2.0443 |
0.8421 |
0.3757 |
0.0826 |
0.1521 |
0.3374 |
0.529 |
11.967 |
42 Year Monthly Rainfall Graph 1959-2001
Decade Rainfall Trends of the 60's, 70's, 80's and 90's.
The first 4 graphs represents decade rainfall averages for each month starting with the 1990's, the 80's, the 70's and the 60's followed by the average of all monthly rainfall data from 1959 to 2001. The decade data averages demonstrate an overall increase in precipitation, which we have been noticing as a shift in the weather pattern since 1982, tending toward more subtropical conditions for the region, driving both warmer ocean currents and tropical weather conditions further north, perhaps accounting for droughts and massive fires in the tropical rainforests. However these conditions are not sufficiently pronounced for most residents busy with indoor or business tasks to take any notice of related global warming trends nor consider alternatives.
Decade Rainfall Averages for the 60's, 70's, 80's & 90's
Rainfall data recorded at: 2480 E Florida Ave (at the corner of Columbia Street and East Florida Avenue), in the city of Hemet California, by the Lake Hemet Municipal Water District, at 8:00 AM as daily precipitation data, measured in inches, consolidated here as monthly totals, using October 1 to September 31 as the standard annual rainfall year.
© 2001, River Grove