平年値（旬ごとの値）
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小河内（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 | 10.4 | 1.9 | 7.5 | -2.0 | 1.1 | 70.5 | /// | /// |
| 中旬 | 16.6 | 1.4 | 6.5 | -2.3 | 1.0 | 63.7 | /// | /// | |
| 下旬 | 22.6 | 1.2 | 6.5 | -2.8 | 1.1 | 72.2 | /// | /// | |
| 2月 | 上旬 | 10.7 | 1.5 | 6.9 | -2.5 | 1.1 | 69.5 | /// | /// |
| 中旬 | 21.8 | 2.1 | 7.6 | -2.0 | 1.1 | 64.7 | /// | /// | |
| 下旬 | 13.8 | 3.2 | 8.6 | -1.1 | 1.1 | 54.0 | /// | /// | |
| 3月 | 上旬 | 34.3 | 4.1 | 9.2 | 0.1 | 1.1 | 50.6 | /// | /// |
| 中旬 | 18.1 | 5.6 | 11.2 | 0.8 | 1.1 | 57.3 | /// | /// | |
| 下旬 | 37.1 | 6.7 | 12.1 | 2.1 | 1.1 | 65.1 | /// | /// | |
| 4月 | 上旬 | 38.4 | 9.0 | 14.6 | 3.9 | 1.2 | 62.6 | /// | /// |
| 中旬 | 40.0 | 10.8 | 16.4 | 6.0 | 1.1 | 55.6 | /// | /// | |
| 下旬 | 27.9 | 12.6 | 18.3 | 7.5 | 1.1 | 60.3 | /// | /// | |
| 5月 | 上旬 | 33.3 | 14.5 | 20.3 | 9.5 | 1.1 | 58.1 | /// | /// |
| 中旬 | 34.3 | 15.2 | 20.7 | 10.6 | 1.0 | 53.3 | /// | /// | |
| 下旬 | 51.2 | 16.8 | 22.2 | 12.3 | 1.0 | 60.8 | /// | /// | |
| 6月 | 上旬 | 38.6 | 17.6 | 22.6 | 13.5 | 1.0 | 45.1 | /// | /// |
| 中旬 | 65.3 | 18.9 | 23.4 | 15.5 | 0.9 | 32.8 | /// | /// | |
| 下旬 | 59.3 | 20.1 | 24.3 | 17.0 | 0.9 | 26.3 | /// | /// | |
| 7月 | 上旬 | 63.5 | 21.6 | 26.1 | 18.4 | 0.9 | 33.9 | /// | /// |
| 中旬 | 67.2 | 22.7 | 27.5 | 19.4 | 0.9 | 39.4 | /// | /// | |
| 下旬 | 76.9 | 23.4 | 28.4 | 20.0 | 0.9 | 52.0 | /// | /// | |
| 8月 | 上旬 | 53.6 | 24.1 | 29.4 | 20.4 | 1.0 | 52.8 | /// | /// |
| 中旬 | 79.4 | 23.7 | 28.7 | 20.3 | 1.0 | 45.3 | /// | /// | |
| 下旬 | 84.4 | 22.9 | 27.6 | 19.6 | 0.9 | 46.5 | /// | /// | |
| 9月 | 上旬 | 111.8 | 21.9 | 26.5 | 18.6 | 1.0 | 42.0 | /// | /// |
| 中旬 | 76.4 | 20.1 | 24.6 | 16.9 | 0.9 | 34.4 | /// | /// | |
| 下旬 | 82.0 | 17.6 | 21.9 | 14.4 | 0.9 | 28.2 | /// | /// | |
| 10月 | 上旬 | 86.5 | 16.3 | 20.6 | 13.2 | 0.9 | 36.2 | /// | /// |
| 中旬 | 72.7 | 14.3 | 18.8 | 11.1 | 0.9 | 40.7 | /// | /// | |
| 下旬 | 56.2 | 12.4 | 17.1 | 8.8 | 0.9 | 51.8 | /// | /// | |
| 11月 | 上旬 | 17.9 | 10.6 | 15.9 | 6.8 | 0.9 | 54.5 | /// | /// |
| 中旬 | 26.5 | 8.8 | 13.9 | 5.0 | 0.9 | 52.4 | /// | /// | |
| 下旬 | 24.5 | 7.1 | 12.3 | 3.3 | 1.0 | 57.7 | /// | /// | |
| 12月 | 上旬 | 18.2 | 5.4 | 10.6 | 1.6 | 1.0 | 55.3 | /// | /// |
| 中旬 | 10.2 | 3.8 | 9.1 | 0.0 | 1.1 | 59.5 | /// | /// | |
| 下旬 | 15.3 | 2.8 | 8.3 | -1.1 | 1.1 | 71.7 | /// | /// | |