平年値（日ごとの値）
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八丈島 2月21時
| 要素 | 気温(℃) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 指定気圧面 | 1000hPa | 925hPa | 900hPa | 850hPa | 800hPa | 700hPa | 600hPa | 500hPa | 400hPa | 350hPa | 300hPa | 250hPa | 200hPa | 175hPa | 150hPa | 125hPa | 100hPa | 70hPa | 50hPa | 40hPa | 30hPa | 20hPa | 15hPa | 10hPa | 5hPa |
| 統計期間 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1993～ 2020 |
| 資料年数 | 21 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 28 | 24 | 3 |
| 1日 | /// | 4.7 | 2.9 | -0.4 | -3.0 | -7.4 | -13.6 | -21.2 | -30.8 | -35.7 | -40.0 | -44.3 | -50.1 | -53.9 | -58.0 | -62.2 | -65.1 | -64.9 | -61.1 | -58.4 | -56.1 | -53.9 | -52.0 | /// | /// |
| 2日 | /// | 4.8 | 3.0 | -0.3 | -2.9 | -7.4 | -13.6 | -21.1 | -30.8 | -35.7 | -40.1 | -44.4 | -50.1 | -53.8 | -58.0 | -62.2 | -65.1 | -64.9 | -61.1 | -58.4 | -56.1 | -53.8 | -52.0 | /// | /// |
| 3日 | /// | 4.8 | 3.0 | -0.3 | -2.8 | -7.3 | -13.5 | -21.1 | -30.8 | -35.7 | -40.1 | -44.5 | -50.1 | -53.8 | -57.9 | -62.2 | -65.1 | -64.9 | -61.2 | -58.5 | -56.1 | -53.8 | -52.0 | /// | /// |
| 4日 | /// | 4.8 | 3.1 | -0.2 | -2.8 | -7.3 | -13.4 | -21.0 | -30.8 | -35.8 | -40.2 | -44.6 | -50.2 | -53.8 | -57.9 | -62.1 | -65.2 | -65.0 | -61.2 | -58.5 | -56.1 | -53.8 | -52.0 | /// | /// |
| 5日 | /// | 4.9 | 3.1 | -0.1 | -2.7 | -7.2 | -13.4 | -21.0 | -30.7 | -35.8 | -40.3 | -44.7 | -50.2 | -53.9 | -57.9 | -62.1 | -65.2 | -65.0 | -61.2 | -58.6 | -56.1 | -53.8 | -52.0 | /// | /// |
| 6日 | /// | 4.9 | 3.2 | -0.1 | -2.6 | -7.1 | -13.3 | -20.9 | -30.7 | -35.8 | -40.4 | -44.9 | -50.3 | -53.9 | -57.9 | -62.1 | -65.2 | -65.0 | -61.2 | -58.6 | -56.1 | -53.8 | -52.0 | /// | /// |
| 7日 | /// | 5.0 | 3.2 | 0.0 | -2.5 | -7.0 | -13.2 | -20.8 | -30.7 | -35.9 | -40.5 | -45.0 | -50.4 | -54.0 | -57.9 | -62.1 | -65.1 | -65.0 | -61.2 | -58.7 | -56.1 | -53.8 | -51.9 | /// | /// |
| 8日 | /// | 5.0 | 3.3 | 0.1 | -2.4 | -6.9 | -13.1 | -20.6 | -30.6 | -35.9 | -40.7 | -45.2 | -50.5 | -54.0 | -58.0 | -62.0 | -65.1 | -65.0 | -61.2 | -58.7 | -56.1 | -53.9 | -51.9 | /// | /// |
| 9日 | /// | 5.1 | 3.4 | 0.2 | -2.3 | -6.8 | -13.0 | -20.5 | -30.5 | -35.9 | -40.7 | -45.3 | -50.6 | -54.1 | -58.0 | -62.0 | -65.1 | -65.0 | -61.2 | -58.8 | -56.1 | -53.9 | -51.8 | /// | /// |
| 10日 | /// | 5.1 | 3.4 | 0.3 | -2.2 | -6.7 | -12.9 | -20.4 | -30.4 | -35.9 | -40.8 | -45.4 | -50.7 | -54.2 | -58.1 | -62.0 | -65.1 | -65.1 | -61.3 | -58.8 | -56.1 | -53.9 | -51.7 | /// | /// |
| 11日 | /// | 5.2 | 3.5 | 0.4 | -2.1 | -6.6 | -12.7 | -20.3 | -30.3 | -35.8 | -40.9 | -45.6 | -50.8 | -54.3 | -58.1 | -62.1 | -65.1 | -65.2 | -61.3 | -58.9 | -56.1 | -53.9 | -51.6 | /// | /// |
| 12日 | /// | 5.2 | 3.5 | 0.4 | -2.1 | -6.5 | -12.6 | -20.1 | -30.3 | -35.8 | -40.9 | -45.7 | -50.9 | -54.4 | -58.2 | -62.1 | -65.2 | -65.2 | -61.4 | -58.9 | -56.1 | -53.9 | -51.5 | /// | /// |
| 13日 | /// | 5.3 | 3.6 | 0.5 | -2.0 | -6.5 | -12.5 | -20.0 | -30.2 | -35.7 | -41.0 | -45.8 | -51.0 | -54.5 | -58.2 | -62.1 | -65.2 | -65.3 | -61.4 | -58.9 | -56.2 | -53.9 | -51.5 | /// | /// |
| 14日 | /// | 5.3 | 3.6 | 0.5 | -1.9 | -6.4 | -12.4 | -19.9 | -30.1 | -35.7 | -41.0 | -45.8 | -51.1 | -54.6 | -58.3 | -62.2 | -65.2 | -65.4 | -61.5 | -58.9 | -56.2 | -53.9 | -51.5 | /// | /// |
| 15日 | /// | 5.4 | 3.7 | 0.6 | -1.9 | -6.3 | -12.3 | -19.8 | -30.0 | -35.6 | -41.0 | -45.9 | -51.2 | -54.6 | -58.3 | -62.2 | -65.2 | -65.5 | -61.5 | -58.9 | -56.2 | -53.9 | -51.5 | /// | /// |
| 16日 | /// | 5.4 | 3.7 | 0.6 | -1.9 | -6.3 | -12.3 | -19.8 | -30.0 | -35.6 | -41.0 | -45.9 | -51.2 | -54.7 | -58.4 | -62.3 | -65.3 | -65.5 | -61.6 | -58.9 | -56.2 | -53.9 | -51.4 | /// | /// |
| 17日 | /// | 5.5 | 3.7 | 0.7 | -1.8 | -6.2 | -12.2 | -19.7 | -29.9 | -35.6 | -41.0 | -46.0 | -51.3 | -54.7 | -58.4 | -62.3 | -65.3 | -65.6 | -61.7 | -58.9 | -56.2 | -53.9 | -51.4 | /// | /// |
| 18日 | /// | 5.5 | 3.8 | 0.8 | -1.7 | -6.1 | -12.1 | -19.6 | -29.9 | -35.5 | -41.1 | -46.1 | -51.3 | -54.7 | -58.4 | -62.3 | -65.3 | -65.6 | -61.7 | -58.8 | -56.2 | -53.9 | -51.4 | /// | /// |
| 19日 | /// | 5.6 | 3.8 | 0.8 | -1.7 | -6.0 | -12.0 | -19.6 | -29.9 | -35.5 | -41.1 | -46.1 | -51.3 | -54.7 | -58.4 | -62.4 | -65.4 | -65.6 | -61.7 | -58.8 | -56.2 | -53.9 | -51.4 | /// | /// |
| 20日 | /// | 5.7 | 3.9 | 0.9 | -1.6 | -6.0 | -11.9 | -19.5 | -29.9 | -35.5 | -41.2 | -46.2 | -51.3 | -54.7 | -58.4 | -62.4 | -65.4 | -65.6 | -61.7 | -58.7 | -56.1 | -53.9 | /// | /// | /// |
| 21日 | /// | 5.8 | 4.0 | 1.0 | -1.5 | -5.9 | -11.8 | -19.5 | -29.9 | -35.6 | -41.3 | -46.4 | -51.3 | -54.7 | -58.4 | -62.4 | -65.4 | -65.6 | -61.7 | -58.6 | -56.1 | -53.9 | /// | /// | /// |
| 22日 | /// | 5.9 | 4.1 | 1.1 | -1.4 | -5.7 | -11.7 | -19.4 | -29.8 | -35.6 | -41.3 | -46.5 | -51.3 | -54.7 | -58.4 | -62.4 | -65.4 | -65.6 | -61.7 | -58.5 | -56.0 | /// | /// | /// | /// |
| 23日 | /// | 6.0 | 4.2 | 1.3 | -1.2 | -5.6 | -11.6 | -19.3 | -29.8 | -35.6 | -41.4 | -46.6 | -51.4 | -54.6 | -58.3 | -62.4 | -65.4 | -65.6 | -61.6 | -58.5 | -56.0 | /// | /// | /// | /// |
| 24日 | /// | 6.1 | 4.3 | 1.4 | -1.1 | -5.5 | -11.5 | -19.3 | -29.8 | -35.6 | -41.5 | -46.8 | -51.4 | -54.6 | -58.3 | -62.3 | -65.4 | -65.5 | -61.6 | -58.4 | -55.9 | /// | /// | /// | /// |
| 25日 | /// | 6.2 | 4.5 | 1.5 | -0.9 | -5.3 | -11.4 | -19.2 | -29.7 | -35.6 | -41.6 | -46.9 | -51.4 | -54.5 | -58.3 | -62.3 | -65.4 | -65.4 | -61.5 | -58.3 | -55.8 | /// | /// | /// | /// |
| 26日 | /// | 6.3 | 4.6 | 1.7 | -0.8 | -5.2 | -11.3 | -19.1 | -29.7 | -35.6 | -41.7 | -47.0 | -51.4 | -54.5 | -58.2 | -62.3 | -65.4 | -65.4 | -61.4 | -58.3 | -55.8 | /// | /// | /// | /// |
| 27日 | /// | 6.4 | 4.7 | 1.8 | -0.6 | -5.1 | -11.2 | -19.1 | -29.6 | -35.6 | -41.8 | -47.1 | -51.5 | -54.4 | -58.2 | -62.2 | -65.3 | -65.3 | -61.3 | -58.2 | -55.7 | /// | /// | /// | /// |
| 28日 | /// | 6.5 | 4.9 | 2.0 | -0.5 | -5.0 | -11.2 | -19.0 | -29.6 | -35.6 | -41.8 | -47.2 | -51.5 | -54.4 | -58.1 | -62.2 | -65.3 | -65.2 | -61.2 | -58.1 | -55.7 | /// | /// | /// | /// |
| 29日 | /// | 6.6 | 5.0 | 2.1 | -0.4 | -4.9 | -11.1 | -19.0 | -29.5 | -35.6 | -41.8 | -47.2 | -51.5 | -54.4 | -58.1 | -62.1 | -65.2 | -65.1 | -61.1 | -58.0 | -55.6 | /// | /// | /// | /// |