Historical Monthly and Annual Rainfall Data San Angelo
| YEAR | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANNUAL | |
| 1867 | M | M | 0.62 | 3.10 | 0.70 | M | M | M | M | M | 0.31 | M | 4.73* | |
| 1868 | M | 1.66 | 3.05 | 3.27 | 4.10 | 0.40 | 7.30 | M | 1.86 | 6.40 | 3.75 | 1.69 | 33.48* | |
| 1869 | 2.45 | 0.20 | 2.41 | 1.10 | 3.21 | 1.88 | 0.43 | 0.92 | 0.26 | 0.48 | 0.78 | 0.80 | 14.92 | |
| 1870 | M | M | M | 0.31 | 13.06 | 2.69 | 1.66 | 3.45 | 4.96 | 2.72 | 0.62 | M | 29.41* | |
| 1871 | 0.00 | 0.27 | 2.75 | 1.45 | 2.20 | 0.21 | 0.00 | 2.04 | 0.90 | 2.78 | 0.44 | 0.20 | 13.24 | |
| 1872 | 0.56 | 0.60 | 0.00 | 1.12 | 1.86 | 2.72 | 3.79 | 2.60 | 0.85 | 0.66 | 1.66 | 0.53 | 16.95 | |
| 1873 | 0.16 | 0.33 | 1.60 | TR | 4.56 | 3.61 | 0.92 | 1.46 | 0.44 | 0.50 | 0.25 | TR | 13.83 | |
| 1874 | 0.25 | 0.25 | 1.14 | 0.39 | 3.29 | 3.05 | 0.88 | 0.61 | 5.58 | 0.64 | 2.92 | 5.80 | 24.80 | |
| 1875 | 0.05 | 1.75 | 1.12 | 0.50 | 1.70 | 0.84 | 5.67 | 0.22 | 1.22 | 0.00 | 0.36 | 2.47 | 14.70 | |
| 1876 | 1.00 | 0.32 | 0.36 | 0.50 | 0.00 | 1.52 | 0.78 | 3.14 | 2.84 | 0.00 | 0.52 | 0.68 | 11.66 | |
| 1877 | M | 0.98 | 0.30 | 1.40 | 2.51 | 1.37 | 0.56 | 2.92 | 5.18 | 1.70 | 1.78 | 2.89 | 21.59* | |
| 1878 | 0.05 | 1.27 | 0.77 | 3.23 | 0.17 | 3.31 | 6.55 | 0.23 | 6.59 | 0.40 | 1.70 | 0.57 | 24.84 | |
| 1879 | 0.26 | 0.06 | 0.30 | 2.65 | 3.13 | 4.54 | 0.08 | 5.80 | 1.34 | 0.20 | 0.00 | 0.18 | 18.54 | |
| 1880 | 4.36 | 1.02 | 1.35 | 0.72 | 2.34 | 3.55 | 10.26 | 2.25 | 7.45 | 2.62 | 1.33 | 0.70 | 37.95 | |
| 1881 | 0.22 | 0.51 | 0.28 | 1.87 | 6.82 | 0.27 | 0.51 | 0.54 | 2.48 | 2.72 | 0.64 | 2.10 | 18.96 | |
| 1882 | 1.48 | 4.14 | 1.25 | 0.17 | 2.26 | 2.86 | 5.57 | 14.03 | 4.25 | 2.79 | 2.77 | 0.55 | 42.12 | |
| 1883 | 0.18 | 1.20 | 3.99 | 0.12 | 5.35 | 1.52 | 3.74 | 3.05 | 3.98 | 8.02 | 0.29 | 1.20 | 32.64 | |
| 1884 | 1.26 | 0.48 | 0.76 | 5.64 | 13.50 | 2.09 | 2.37 | 1.20 | 3.60 | 5.49 | 1.95 | 3.57 | 41.91 | |
| 1885 | 1.30 | 0.41 | 1.74 | 4.16 | 2.80 | 4.55 | 1.59 | 1.91 | 1.93 | 0.00 | TR | 0.70 | 21.10 | |
| 1886 | 0.15 | 0.80 | 0.75 | 0.48 | 0.76 | 1.60 | 0.36 | 3.74 | 0.76 | 1.35 | 0.00 | TR | 10.75 | |
| 1887 | 0.00 | 0.10 | 0.00 | 1.76 | 2.86 | 0.66 | 0.93 | 1.88 | 2.81 | 1.74 | 0.68 | 0.98 | 14.40 | |
| 1888 | 1.10 | 1.98 | 0.92 | 3.63 | 1.37 | 1.66 | 3.10 | 2.56 | 0.48 | 1.72 | 2.20 | 0.40 | 21.12 | |
| 1889 | 1.94 | 2.57 | 1.15 | 2.03 | 2.28 | M | M | M | M | M | M | M | 9.97* | |
| 1890 | M | M | M | M | M | M | M | M | M | M | M | M | M | |
| 1891 | 1.55 | 0.09 | M | 1.45 | 4.12 | 0.91 | M | M | M | M | M | M | 8.12* | |
| 1892 | 0.22 | 0.44 | M | TR | M | 0.54 | 0.70 | M | M | M | M | M | 1.90* | |
| DATA MISSING FROM 1893 TO 1903 | ||||||||||||||
| 1904 | 0.68 | 0.43 | 0.00 | 2.43 | 3.25 | 5.25 | 0.81 | 1.81 | 2.35 | 2.55 | 1.68 | 0.45 | 21.69 | |
| 1905 | 1.20 | 1.33 | 3.45 | 3.07 | 6.14 | 2.14 | 0.68 | 0.55 | 0.44 | 2.25 | 1.39 | 0.19 | 22.83 | |
| 1906 | 0.10 | 0.57 | 0.89 | 4.24 | 1.87 | 2.44 | 3.79 | 11.31 | 3.90 | 0.71 | 1.52 | 0.53 | 31.87 | |
| 1907 | M | M | M | M | M | M | M | 0.31 | 0.31 | 5.15 | 2.61 | 0.40 | 8.78* | |
| 1908 | 0.28 | 0.32 | 1.23 | 6.54 | 1.59 | 1.33 | 2.64 | 3.53 | 1.65 | 1.20 | 2.32 | TR | 22.63 | |
| 1909 | 0.10 | 0.02 | 0.11 | 0.10 | 2.90 | 1.80 | 2.46 | 0.92 | 1.80 | 2.84 | 1.62 | 1.15 | 15.82 | |
| 1910 | 0.60 | 0.15 | 1.18 | 2.00 | 0.82 | 0.94 | 0.08 | TR | 2.19 | 1.88 | TR | 0.40 | 10.24 | |
| 1911 | 0.17 | 3.63 | 0.83 | 3.08 | 0.04 | 0.97 | 4.80 | 7.31 | 2.15 | 1.06 | 0.63 | 5.96 | 30.63 | |
| 1912 | TR | 2.05 | 0.40 | 1.49 | 1.12 | 1.62 | 0.28 | 2.90 | TR | 0.92 | 2.02 | 2.07 | 14.88 | |
| 1913 | 0.44 | 0.80 | 0.30 | 1.65 | 5.67 | 4.60 | 0.60 | 1.75 | 1.57 | 3.19 | 7.02 | 1.95 | 29.54 | |
| 1914 | TR | 0.01 | 0.17 | 1.20 | 5.56 | 1.84 | 2.69 | 7.60 | 0.20 | 4.50 | 3.34 | 0.21 | 27.41 | |
| 1915 | 1.32 | 0.95 | 0.30 | 6.40 | 2.43 | 0.47 | 1.60 | 1.34 | 8.27 | 0.00 | TR | 0.40 | 23.48 | |
| 1916 | 0.31 | 0.00 | TR | 3.62 | 1.60 | 2.82 | 1.04 | 1.06 | 2.56 | 1.33 | 0.03 | 0.04 | 14.41 | |
| 1917 | 0.50 | 0.10 | 0.22 | 0.55 | 2.81 | 0.00 | 0.90 | 0.41 | 1.90 | TR | TR | TR | 8.29 | |
| 1918 | 0.46 | 0.41 | 0.25 | TR | 3.88 | 0.35 | 0.10 | 0.25 | 0.80 | 4.74 | 1.48 | 2.55 | 15.27 | |
| 1919 | 5.41 | 0.68 | 2.41 | 1.85 | 3.87 | 6.13 | 3.32 | 2.83 | 6.57 | 4.89 | 2.28 | 0.64 | 40.88 | |
| 1920 | 2.43 | 0.35 | 0.26 | 0.00 | 1.96 | 4.28 | 0.59 | 6.29 | 1.65 | 1.74 | 0.83 | 0.13 | 20.25 | |
| 1921 | 0.33 | 0.77 | 2.66 | 0.62 | 2.20 | 3.89 | 0.17 | 0.82 | 0.70 | TR | TR | 0.15 | 12.31 | |
| 1922 | 0.41 | 0.10 | 0.12 | 6.07 | 5.33 | 2.13 | 3.40 | 0.03 | 1.69 | 2.08 | 1.28 | TR | 22.64 | |
| 1923 | 2.65 | 3.97 | 1.41 | 2.44 | 1.61 | 0.55 | 1.08 | 2.04 | 1.67 | 2.78 | 2.99 | 0.81 | 23.99 | |
| 1924 | 0.12 | 2.07 | 1.33 | 0.25 | 4.50 | TR | TR | 0.23 | 1.68 | 1.09 | 0.00 | 2.23 | 13.50 | |
* Incomplete Records
# First Order Station November 1, 1947