平年値（旬ごとの値）
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大島（東京都) 平年値（旬ごとの値）
| 要素 | 海面気圧 (hPa) | 降水量 (mm) | 平均気温 (℃) | 日最高気温 (℃) | 日最低気温 (℃) | 相対湿度 (%) | 平均風速 (m/s) | 日照時間 (時) | 全天日射量 (MJ/㎡) | 降雪の深さ合計 (cm) | 最深積雪 (cm) | 雲量 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 統計期間 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2009 | 1991～ 2009 | 1991～ 2009 | 1991～ 2009 | |
| 資料年数 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 19 | 19 | 19 | 19 | |
| 1月 | 上旬 | 1014.8 | 37.0 | 8.1 | 11.6 | 4.4 | 64 | 5.5 | 52.6 | 8.6 @ | 0 @ | --- @ | 4.8 @ |
| 中旬 | 1016.2 | 44.0 | 7.4 | 10.7 | 3.8 | 65 | 5.2 | 46.9 | 8.3 @ | 0 @ | --- @ | 5.7 @ | |
| 下旬 | 1015.3 | 56.3 | 7.1 | 10.7 | 3.5 | 63 | 5.5 | 54.1 | 9.4 @ | 0 @ | 0 @ | 5.6 @ | |
| 2月 | 上旬 | 1014.7 | 35.4 | 7.2 | 11.1 | 3.4 | 64 | 5.0 | 53.7 | 11.0 @ | 0 @ | 0 @ | 5.2 @ |
| 中旬 | 1015.4 | 56.1 | 7.8 | 11.6 | 4.0 | 66 | 5.2 | 48.6 | 11.4 @ | 1 @ | 1 @ | 5.6 @ | |
| 下旬 | 1017.1 | 54.6 | 8.5 | 12.3 | 4.7 | 67 | 5.3 | 43.1 | 12.5 @ | 0 @ | 0 @ | 5.9 @ | |
| 3月 | 上旬 | 1014.8 | 83.0 | 9.4 | 13.2 | 5.8 | 69 | 5.5 | 48.0 | 12.7 @ | 0 @ | --- @ | 6.3 @ |
| 中旬 | 1015.3 | 61.7 | 10.5 | 14.3 | 6.6 | 69 | 5.5 | 52.8 | 13.1 @ | 0 @ | --- @ | 6.6 @ | |
| 下旬 | 1014.7 | 93.8 | 11.4 | 15.1 | 7.5 | 71 | 5.3 | 59.3 | 13.7 @ | 0 @ | --- @ | 6.9 @ | |
| 4月 | 上旬 | 1014.4 | 84.0 | 13.1 | 17.0 | 9.2 | 72 | 5.3 | 59.4 | 16.3 @ | --- @ | --- @ | 6.5 @ |
| 中旬 | 1013.6 | 91.8 | 14.4 | 18.1 | 10.7 | 75 | 5.3 | 55.0 | 15.7 @ | 0 @ | --- @ | 6.6 @ | |
| 下旬 | 1013.7 | 71.7 | 15.7 | 19.6 | 12.0 | 76 | 5.1 | 59.8 | 17.0 @ | 0 @ | --- @ | 6.7 @ | |
| 5月 | 上旬 | 1013.1 | 80.9 | 17.3 | 21.1 | 13.8 | 78 | 4.9 | 57.2 | 16.2 @ | --- @ | --- @ | 7.5 @ |
| 中旬 | 1012.1 | 79.0 | 17.9 | 21.7 | 14.6 | 79 | 4.7 | 57.5 | 16.5 @ | --- @ | --- @ | 7.7 @ | |
| 下旬 | 1011.0 | 96.6 | 19.2 | 23.0 | 15.9 | 80 | 4.4 | 65.0 | 18.2 @ | --- @ | --- @ | 7.2 @ | |
| 6月 | 上旬 | 1010.5 | 93.5 | 20.0 | 23.8 | 16.9 | 81 | 4.0 | 54.1 | 17.4 @ | --- @ | --- @ | 7.7 @ |
| 中旬 | 1008.6 | 128.8 | 21.0 | 24.1 | 18.5 | 86 | 4.5 | 38.6 | 14.4 @ | --- @ | --- @ | 8.3 @ | |
| 下旬 | 1008.2 | 107.8 | 22.1 | 25.1 | 19.7 | 88 | 4.4 | 33.1 | 13.3 @ | --- @ | --- @ | 8.9 @ | |
| 7月 | 上旬 | 1008.7 | 115.1 | 23.4 | 26.4 | 21.1 | 88 | 4.8 | 39.3 | 14.9 @ | --- @ | --- @ | 8.3 @ |
| 中旬 | 1008.9 | 76.5 | 24.8 | 28.0 | 22.4 | 87 | 4.6 | 50.7 | 16.2 @ | --- @ | --- @ | 8.3 @ | |
| 下旬 | 1009.8 | 64.3 | 25.6 | 29.0 | 23.1 | 87 | 4.4 | 62.1 | 18.1 @ | --- @ | --- @ | 7.7 @ | |
| 8月 | 上旬 | 1010.4 | 38.4 | 26.2 | 29.7 | 23.7 | 86 | 4.3 | 65.5 | 18.8 @ | --- @ | --- @ | 7.3 @ |
| 中旬 | 1009.8 | 66.6 | 26.2 | 29.7 | 23.7 | 86 | 4.4 | 59.5 | 17.5 @ | --- @ | --- @ | 7.1 @ | |
| 下旬 | 1010.5 | 86.6 | 25.7 | 29.2 | 23.1 | 85 | 4.3 | 65.1 | 17.1 @ | --- @ | --- @ | 6.9 @ | |
| 9月 | 上旬 | 1011.0 | 113.3 | 24.9 | 28.5 | 22.3 | 85 | 4.3 | 54.2 | 15.7 @ | --- @ | --- @ | 7.0 @ |
| 中旬 | 1012.6 | 118.3 | 23.6 | 26.9 | 21.0 | 84 | 4.5 | 48.2 | 13.8 @ | --- @ | --- @ | 7.3 @ | |
| 下旬 | 1014.4 | 109.8 | 21.6 | 24.7 | 19.0 | 82 | 5.0 | 38.6 | 11.6 @ | --- @ | --- @ | 7.8 @ | |
| 10月 | 上旬 | 1014.9 | 159.7 | 20.4 | 23.5 | 17.9 | 81 | 5.1 | 39.9 | 10.6 @ | --- @ | --- @ | 7.4 @ |
| 中旬 | 1016.2 | 137.6 | 19.0 | 22.1 | 16.3 | 79 | 5.0 | 42.0 | 11.1 @ | --- @ | --- @ | 6.7 @ | |
| 下旬 | 1016.7 | 108.0 | 17.4 | 20.6 | 14.4 | 76 | 5.0 | 49.6 | 10.2 @ | --- @ | --- @ | 6.2 @ | |
| 11月 | 上旬 | 1017.8 | 60.8 | 16.1 | 19.4 | 13.0 | 75 | 4.9 | 48.5 | 9.7 @ | --- @ | --- @ | 5.8 @ |
| 中旬 | 1017.4 | 66.0 | 14.5 | 17.7 | 11.4 | 73 | 5.1 | 45.3 | 8.8 @ | --- @ | --- @ | 5.8 @ | |
| 下旬 | 1018.0 | 66.1 | 13.0 | 16.3 | 9.6 | 72 | 5.1 | 46.5 | 8.7 @ | 0 @ | --- @ | 5.6 @ | |
| 12月 | 上旬 | 1017.5 | 41.2 | 11.4 | 14.7 | 7.9 | 71 | 5.3 | 45.3 | 7.9 @ | 0 @ | --- @ | 5.4 @ |
| 中旬 | 1016.9 | 33.8 | 9.9 | 13.3 | 6.4 | 67 | 5.5 | 48.2 | 8.2 @ | 0 @ | --- @ | 5.2 @ | |
| 下旬 | 1015.7 | 42.6 | 9.0 | 12.5 | 5.3 | 66 | 5.4 | 54.1 | 8.2 @ | 0 @ | --- @ | 4.6 @ | |
- 「@」の付いた値は、参考値です。平年差や平年比に利用できません。