平年値（旬ごとの値）
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八王子（東京都) 平年値（旬ごとの値）
| 要素 | 降水量 (mm) | 平均気温 (℃) | 日最高気温 (℃) | 日最低気温 (℃) | 平均風速 (m/s) | 日照時間 (h) | 降雪の深さ合計 (cm) | 最深積雪 (cm) | |
|---|---|---|---|---|---|---|---|---|---|
| 統計期間 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | /// | /// | |
| 資料年数 | 30 | 30 | 30 | 30 | 30 | 30 | 0 | 0 | |
| 1月 | 上旬 | 10.5 | 3.6 | 9.9 | -1.8 | 2.3 | 68.5 | /// | /// |
| 中旬 | 18.7 | 3.3 | 9.0 | -1.7 | 2.3 | 61.3 | /// | /// | |
| 下旬 | 25.0 | 3.3 | 9.2 | -1.9 | 2.5 | 71.3 | /// | /// | |
| 2月 | 上旬 | 11.3 | 3.6 | 9.6 | -1.6 | 2.5 | 66.2 | /// | /// |
| 中旬 | 21.2 | 4.3 | 10.2 | -1.0 | 2.6 | 61.5 | /// | /// | |
| 下旬 | 13.8 | 5.6 | 11.3 | 0.3 | 2.8 | 52.4 | /// | /// | |
| 3月 | 上旬 | 41.7 | 6.6 | 12.0 | 1.5 | 2.8 | 52.9 | /// | /// |
| 中旬 | 19.7 | 8.2 | 14.0 | 2.4 | 3.1 | 61.2 | /// | /// | |
| 下旬 | 42.9 | 9.3 | 14.8 | 3.9 | 3.0 | 60.8 | /// | /// | |
| 4月 | 上旬 | 41.4 | 11.5 | 17.3 | 5.8 | 3.3 | 62.2 | /// | /// |
| 中旬 | 43.5 | 13.4 | 19.1 | 7.9 | 3.3 | 56.0 | /// | /// | |
| 下旬 | 29.3 | 15.1 | 20.9 | 9.5 | 3.4 | 61.1 | /// | /// | |
| 5月 | 上旬 | 31.6 | 17.0 | 22.7 | 11.5 | 3.4 | 58.7 | /// | /// |
| 中旬 | 37.0 | 17.7 | 23.1 | 12.7 | 3.1 | 54.0 | /// | /// | |
| 下旬 | 56.0 | 19.3 | 24.8 | 14.5 | 3.2 | 63.3 | /// | /// | |
| 6月 | 上旬 | 45.3 | 20.3 | 25.3 | 15.7 | 3.0 | 52.1 | /// | /// |
| 中旬 | 68.9 | 21.4 | 26.0 | 17.6 | 2.9 | 38.1 | /// | /// | |
| 下旬 | 57.8 | 22.6 | 26.8 | 19.0 | 2.7 | 29.5 | /// | /// | |
| 7月 | 上旬 | 61.0 | 24.2 | 28.7 | 20.5 | 2.8 | 38.9 | /// | /// |
| 中旬 | 63.1 | 25.4 | 30.2 | 21.6 | 2.8 | 46.1 | /// | /// | |
| 下旬 | 64.2 | 26.3 | 31.2 | 22.4 | 3.0 | 60.1 | /// | /// | |
| 8月 | 上旬 | 46.8 | 27.1 | 32.3 | 22.9 | 3.0 | 64.9 | /// | /// |
| 中旬 | 77.4 | 26.5 | 31.5 | 22.6 | 3.0 | 55.8 | /// | /// | |
| 下旬 | 88.3 | 25.7 | 30.6 | 21.8 | 2.9 | 56.6 | /// | /// | |
| 9月 | 上旬 | 87.0 | 24.7 | 29.5 | 20.8 | 2.9 | 48.0 | /// | /// |
| 中旬 | 93.5 | 22.8 | 27.4 | 19.0 | 2.7 | 43.1 | /// | /// | |
| 下旬 | 84.0 | 20.3 | 24.6 | 16.5 | 2.7 | 37.6 | /// | /// | |
| 10月 | 上旬 | 99.4 | 18.9 | 23.3 | 15.3 | 2.5 | 37.5 | /// | /// |
| 中旬 | 73.9 | 17.0 | 21.6 | 13.2 | 2.4 | 42.5 | /// | /// | |
| 下旬 | 57.5 | 15.0 | 19.8 | 10.7 | 2.3 | 52.4 | /// | /// | |
| 11月 | 上旬 | 21.6 | 13.0 | 18.3 | 8.4 | 2.1 | 53.1 | /// | /// |
| 中旬 | 28.9 | 11.0 | 16.2 | 6.4 | 2.1 | 50.4 | /// | /// | |
| 下旬 | 29.7 | 9.3 | 14.6 | 4.6 | 2.1 | 53.4 | /// | /// | |
| 12月 | 上旬 | 20.8 | 7.4 | 12.9 | 2.7 | 2.1 | 53.4 | /// | /// |
| 中旬 | 13.8 | 5.7 | 11.6 | 0.6 | 2.2 | 60.4 | /// | /// | |
| 下旬 | 18.5 | 4.6 | 10.6 | -0.7 | 2.3 | 70.4 | /// | /// | |