| 2009年,平成21年松本平晴天率 | ||||||
| 月 | 晴天 | 降雨降雪 | 日数 | 晴天率 | 降雨率 | 休日晴天率 |
| 1 | 14 | 11 | 31 | 45 | 35 | 58 |
| 2 | 11 | 8 | 28 | 39 | 29 | 75 |
| 3 | 13 | 11 | 31 | 42 | 35 | 60 |
| 4 | 20 | 7 | 30 | 67 | 23 | 67 |
| 5 | 12 | 13 | 31 | 39 | 42 | 23 |
| 6 | 11 | 12 | 30 | 37 | 40 | 50 |
| 7 | 8 | 21 | 31 | 26 | 68 | 33 |
| 8 | 15 | 10 | 31 | 48 | 32 | 33 |
| 9 | 13 | 11 | 30 | 43 | 37 | 55 |
| 10 | 18 | 7 | 31 | 58 | 23 | 60 |
| 11 | 11 | 12 | 30 | 37 | 40 | 45 |
| 12 | 31 | 0 | 0 | |||