月 別 天 気 出 現 率
| 月別天気出現率（９時） | １９６８年〜１９９７年（３０年） | ||||||||
| 快晴 | 晴 | 薄曇 | 高曇 | 本曇 | 霧 | 雨 | 霙 | 雪 | |
| １月 | 21% | 5% | 3% | 3% | 3% | 22% | 0% | 0% | 42% |
| ２月 | 20% | 7% | 4% | 5% | 5% | 23% | 0% | 1% | 36% |
| ３月 | 25% | 9% | 7% | 6% | 5% | 20% | 1% | 1% | 26% |
| ４月 | 26% | 11% | 10% | 7% | 5% | 21% | 6% | 2% | 13% |
| ５月 | 22% | 13% | 10% | 10% | 7% | 21% | 12% | 1% | 4% |
| ６月 | 11% | 15% | 9% | 11% | 10% | 25% | 19% | 1% | 1% |
| ７月 | 11% | 17% | 5% | 8% | 7% | 31% | 21% | 0% | 0% |
| ８月 | 19% | 18% | 5% | 6% | 6% | 31% | 15% | 0% | 0% |
| ９月 | 18% | 13% | 6% | 10% | 7% | 26% | 19% | 0% | 0% |
| １０月 | 32% | 11% | 4% | 9% | 5% | 23% | 9% | 1% | 5% |
| １１月 | 32% | 7% | 4% | 4% | 5% | 23% | 4% | 2% | 19% |
| １２月 | 27% | 7% | 3% | 4% | 2% | 21% | 0% | 0% | 36% |
| 月別天気出現率（１５時） | |||||||||
| 快晴 | 晴 | 薄曇 | 高曇 | 本曇 | 霧 | 雨 | 霙 | 雪 | |
| １月 | 15% | 7% | 5% | 5% | 3% | 17% | 0% | 0% | 50% |
| ２月 | 13% | 7% | 5% | 6% | 5% | 20% | 0% | 1% | 43% |
| ３月 | 14% | 10% | 7% | 7% | 6% | 20% | 1% | 2% | 33% |
| ４月 | 14% | 14% | 9% | 12% | 7% | 20% | 6% | 2% | 17% |
| ５月 | 9% | 14% | 10% | 12% | 13% | 22% | 12% | 3% | 6% |
| ６月 | 2% | 10% | 5% | 13% | 15% | 32% | 21% | 1% | 1% |
| ７月 | 2% | 11% | 3% | 9% | 13% | 38% | 25% | 0% | 0% |
| ８月 | 2% | 14% | 3% | 8% | 18% | 38% | 18% | 0% | 0% |
| ９月 | 5% | 12% | 4% | 11% | 15% | 32% | 21% | 0% | 0% |
| １０月 | 18% | 13% | 4% | 10% | 9% | 29% | 9% | 1% | 8% |
| １１月 | 24% | 8% | 4% | 7% | 6% | 23% | 4% | 1% | 21% |
| １２月 | 24% | 8% | 2% | 5% | 2% | 20% | 0% | 1% | 38% |