US Geography / US Weather / California Weather / San Ysidro |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 65 | 65 | 65 | 66 | 67 | 68 | 74 | 75 | 75 | 74 | 68 | 65 |
| Avg. Low | 45 | 47 | 48 | 51 | 56 | 58 | 64 | 65 | 62 | 57 | 50 | 45 |
| Mean | 55 | 56 | 57 | 58 | 62 | 64 | 68 | 70 | 68 | 65 | 60 | 55 |
| Avg. Precip. | 1.6 in | 1.4 in | 1.8 in | 0.8 in | 0.3 in | 0.1 in | 0.0 in | 0.1 in | 0.3 in | 0.4 in | 1.6 in | 1.4 in |
Degrees in Fahrenheit
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