観測開始からの毎月の値
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八丈島（東京都) 日照時間の月合計値（h）
| 年 | 1月 | 2月 | 3月 | 4月 | 5月 | 6月 | 7月 | 8月 | 9月 | 10月 | 11月 | 12月 | 年の値 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 105.9 | 85.3 | 125.4 | 164.0 | 222.0 | 101.3 | 135.9 | 166.2 | 128.4 | 141.2 | 81.5 | 124.7 | 1581.8 | |
| 111.2 | 84.3 | 95.9 | 113.1 | 167.2 | 99.0 | 127.6 | 177.4 | 107.5 | 120.0 | 140.5 | 131.8 | 1475.5 | |
| 78.5 | 78.0 | 103.9 | 154.3 | 185.7 | 81.0 | 171.1 | 248.4 | 159.2 | 98.6 | 85.4 | 108.4 | 1552.5 | |
| 85.8 | 100.6 | 106.1 | 146.0 | 135.5 | 80.0 | 129.4 | 150.1 | 115.2 | 75.5 | 126.4 | 78.4 | 1329.0 | |
| 86.1 | 121.4 | 98.9 | 149.8 | 128.9 | 83.9 | 154.9 | 193.0 | 216.9 | 125.7 | 122.9 | 101.4 | 1583.8 | |
| 89.6 | 117.2 | 124.4 | 145.1 | 156.2 | 182.2 | 166.9 | 230.1 | 115.6 | 121.4 | 98.2 | 99.1 | 1646.0 | |
| 123.3 | 116.4 | 158.0 | 106.4 | 192.7 | 142.8 | 186.4 | 177.4 | 135.4 | 93.6 | 137.3 | 130.8 | 1700.5 | |
| 116.3 | 99.9 | 137.6 | 151.3 | 170.6 | 115.1 | 212.4 | 201.7 | 213.8 | 131.6 | 111.7 | 98.6 | 1760.6 | |
| 106.6 | 83.0 | 141.3 | 109.4 | 174.5 | 83.8 | 243.3 | 176.4 | 206.1 | 104.7 | 117.1 | 110.7 | 1656.9 | |
| 132.6 | 104.6 | 127.2 | 140.2 | 150.7 | 158.8 | 166.7 | 146.1 | 215.9 | 71.7 | 108.4 | 117.1 | 1640.0 | |
| 98.7 | 126.9 | 121.3 | 176.5 | 193.6 | 114.0 | 277.8 | 191.7 | 163.1 | 107.6 | 131.5 | 116.4 | 1819.1 | |
| 91.9 | 98.3 | 130.1 | 148.8 | 206.9 | 93.8 | 237.1 | 262.1 | 215.0 | 99.7 | 95.5 | 80.2 | 1759.4 | |
| 91.2 | 96.0 | 153.1 | 223.7 | 228.0 | 103.7 | 138.2 | 181.5 | 193.1 | 117.0 | 78.7 | 110.7 | 1714.9 | |
| 104.6 | 103.2 | 105.4 | 179.2 | 182.5 | 145.8 | 278.9 | 222.7 | 152.7 | 124.9 | 108.5 | 98.2 | 1806.6 | |
| 125.3 | 127.8 | 163.7 | 172.1 | 183.2 | 72.4 | 201.5 | 213.4 | 133.3 | 110.9 | 159.4 | 135.2 | 1798.2 | |
| 98.0 | 110.2 | 164.4 | 135.9 | 202.5 | 137.1 | 168.3 | 222.5 | 208.6 | 146.6 | 100.5 | 128.3 | 1822.9 | |
| 98.9 | 60.5 | 148.4 | 137.3 | 124.7 | 92.0 | 156.1 | 266.9 | 164.4 | 130.4 | 153.2 | 79.3 | 1612.1 | |
| 107.5 | 81.4 | 154.6 | 148.0 | 159.3 | 113.5 | 238.0 | 192.8 | 166.8 | 109.8 | 145.1 | 115.2 | 1732.0 | |
| 91.6 | 82.5 | 157.7 | 153.7 | 196.4 | 150.7 | 188.6 | 152.6 | 168.6 | 124.6 | 131.8 | 104.1 | 1702.9 | |
| 112.1 | 107.2 | 129.6 | 196.2 | 214.5 | 159.9 | 149.6 | 205.7 | 212.3 | 142.4 | 149.6 | 101.3 | 1880.4 | |
| 115.9 | 112.6 | 132.3 | 170.2 | 179.3 | 99.6 | 212.6 | 218.5 | 160.4 | 142.8 | 140.2 | 109.7 | 1794.1 | |
| 66.5 | 124.1 | 159.3 | 155.7 | 126.0 | 77.6 | 164.5 | 147.4 | 181.7 | 71.0 | 89.7 | 91.3 | 1454.8 | |
| 93.2 | 122.6 | 124.4 | 160.9 | 119.6 | 153.7 | 242.5 | 234.4 | 122.8 | 123.6 | 89.8 | 94.7 | 1682.2 | |
| 102.5 | 94.8 | 137.0 | 113.3 | 130.0 | 88.5 | 221.3 | 241.4 | 169.5 | 104.8 | 120.1 | 74.6 | 1597.8 | |
| 91.5 | 52.6 | 165.9 | 135.3 | 204.9 | 135.4 | 62.5 | 245.5 | 138.0 | 130.1 | 89.8 | 86.8 | 1538.3 | |
| 113.3 | 68.8 | 111.6 | 167.5 | 135.6 | 95.4 | 185.2 | 254.7 | 152.6 | 96.7 | 129.2 | 108.7 | 1619.3 | |
| 78.2 | 109.5 | 110.6 | 137.5 | 174.7 | 173.0 | 305.2 | 270.3 | 179.8 | 148.9 | 115.9 | 116.0 | 1919.6 | |
| 80.1 | 104.9 | 125.8 | 119.3 | 232.5 | 109.6 | 160.4 | 271.4 | 185.1 | 103.2 | 131.0 | 89.1 | 1712.4 | |
| 86.9 | 99.7 | 137.5 | 165.2 | 203.4 | 202.6 | 236.3 | 233.7 | 152.8 | 171.2 | 125.5 | 101.4 | 1916.2 | |
| 79.9 | 91.1 | 131.8 | 134.2 | 161.2 | 178.1 | 216.1 | 238.5 | 187.1 | 120.3 | 111.2 | 92.5 | 1742.0 | |
| 75.2 | 68.8 | 113.6 | 146.7 | 192.5 | 154.8 | 222.9 | 279.6 | 182.2 | 148.1 | 110.2 | 117.1 | 1811.7 | |
| 69.7 | 102.6 | 110.5 | 218.0 | 170.4 | 131.5 | 207.7 | 146.4 | 163.2 | 139.8 | 148.0 | 116.6 | 1724.4 | |
| 98.5 | 106.6 | 137.8 | 138.7 | 200.8 | 105.5 | 247.9 | 240.8 | 167.3 | 120.8 | 98.3 | 105.0 | 1768.0 | |
| 105.6 | 108.7 | 135.9 | 214.3 | 201.1 | 193.9 | 231.7 | 229.4 | 148.9 | 145.1 | 101.5 | 125.3 | 1941.4 | |
| 114.3 | 101.5 | 170.9 | 179.8 | 175.8 | 82.9 | 118.0 | 234.1 | 159.1 | 182.0 | 94.9 | 98.5 | 1711.8 | |
| 108.7 | 76.1 | 162.7 | 188.9 | 198.9 | 107.2 | 255.0 | 238.1 | 208.7 | 171.6 | 135.0 | 110.1 | 1961.0 | |
| 128.4 | 130.0 | 119.2 | 182.3 | 187.6 | 145.1 | 183.2 | 267.9 | 228.6 | 177.8 | 110.6 | 135.1 | 1995.8 | |
| 134.9 | 154.9 | 175.2 | 206.4 | 137.8 | 109.4 | 190.8 | 234.8 | 202.7 | 117.4 | 86.6 | 94.9 | 1845.8 | |
| 98.4 | 112.9 | 169.8 | 205.7 | 174.8 | 104.3 | 176.7 | 276.9 | 205.7 | 148.5 | 169.4 | 137.3 | 1980.4 | |
| 140.0 | 123.7 | 127.0 | 166.5 | 144.9 | 116.5 | 246.1 | 252.8 | 184.4 | 137.9 | 91.7 | 139.8 | 1871.3 | |
| 107.2 | 130.3 | 195.4 | 222.3 | 190.1 | 105.1 | 215.3 | 265.9 | 193.2 | 113.6 | 134.9 | 121.8 | 1995.1 | |
| 110.7 | 138.8 | 135.8 | 175.0 | 138.6 | 154.2 | 193.3 | 172.9 | 229.4 | 165.7 | 121.3 | 135.9 | 1871.6 | |
| 162.6 | 138.2 | 164.8 | 227.5 | 200.1 | 71.7 | 232.4 | 272.7 | 174.7 | 73.5 | 91.8 | 102.4 | 1912.4 | |
| 135.9 | 112.0 | 142.7 | 137.8 | 119.1 | 108.4 | 218.4 | 224.5 | 198.9 | 154.3 | 95.2 | 126.2 | 1773.4 | |
| 127.3 | 84.5 | 144.6 | 111.9 | 181.0 | 98.7 | 169.6 | 266.7 | 175.1 | 117.1 | 142.9 | 151.3 | 1770.7 | |
| 115.2 | 105.9 | 159.1 | 176.9 | 152.7 | 70.5 | 169.6 | 222.8 | 177.6 | 145.9 | 84.5 | 134.1 | 1714.8 | |
| 109.1 | 77.1 | 125.8 | 164.1 | 178.1 | 63.4 | 161.7 | 135.2 | 155.8 | 106.4 | 114.7 | 123.0 | 1514.4 | |
| 71.7 | 113.3 | 103.6 | 134.6 | 128.5 | 73.1 | 115.6 | 229.0 | 165.6 | 95.3 | 105.9 | 104.7 | 1440.9 | |
| 94.4 | 114.5 | 113.0 | 125.1 | 155.8 | 76.6 | 218.6 | 182.4 | 175.2 | 111.2 | 103.9 | 139.6 | 1610.3 | |
| 124.0 | 120.5 | 120.3 | 144.1 | 97.2 | 141.7 | 209.2 | 216.2 | 182.8 | 100.4 | 137.5 | 148.3 | 1742.2 | |
| 115.9 | 112.5 | 171.3 | 180.7 | 185.5 | 124.7 | 176.9 | 230.8 | 120.1 | 139.1 | 95.4 | 130.0 | 1782.9 | |
| 128.5 | 130.1 | 165.0 | 148.2 | 148.1 | 108.0 | 171.5 | 222.6 | 209.6 | 124.8 | 111.0 | 133.4 | 1800.8 | |
| 115.6 | 91.5 | 156.2 | 183.7 | 190.5 | 139.4 | 159.4 | 249.7 | 203.9 | 150.6 | 99.8 | 119.9 | 1860.2 | |
| 127.1 | 143.3 | 166.6 | 141.0 | 168.9 | 144.1 | 220.5 | 220.9 | 215.6 | 113.2 | 112.5 | 107.9 | 1881.6 | |
| 113.4 | 106.7 | 162.1 | 180.9 | 132.1 | 154.2 | 206.9 | 241.8 | 201.2 | 113.7 | 143.7 | 150.2 | 1906.9 | |
| 94.7 | 114.9 | 158.3 | 176.7 | 142.0 | 134.6 | 118.2 | 207.4 | 221.9 | 118.8 | 92.3 | 115.4 | 1695.2 | |
| 108.1 | 143.5 | 144.3 | 150.7 | 71.0 | 137.5 | 186.6 | 175.6 | 157.2 | 125.5 | 111.3 | 136.1 | 1647.4 | |
| 96.1 | 96.9 | 177.5 | 119.6 | 186.0 | 113.4 | 192.7 | 225.6 | 163.6 | 168.8 | 126.1 | 130.2 | 1796.5 | |
| 111.2 | 102.3 | 193.8 | 154.8 | 135.9 | 74.8 | 86.8 | 194.9 | 116.0 | 142.3 | 141.5 | 90.4 | 1544.7 | |
| 136.1 | 107.8 | 162.1 | 108.0 | 171.4 | 110.1 | 141.9 | 267.4 | 143.5 | 188.4 | 118.4 | 114.8 | 1769.9 | |
| 134.9 | 126.8 | 126.9 | 130.0 | 192.7 | 172.0 | 137.8 | 181.5 | 145.7 | 125.8 | 102.8 | 94.9 | 1671.8 | |
| 132.7 | 120.5 | 142.0 | 205.6 | 174.1 | 111.4 | 121.1 | 195.9 | 160.7 | 100.8 | 180.8 | 108.8 | 1754.4 | |
| 81.0 | 83.7 | 129.0 | 170.0 | 194.3 | 161.3 | 170.4 | 253.5 | 169.8 | 144.2 | 118.5 | 155.4 | 1831.1 | |
| 138.4 | 129.1 | 153.0 | 98.4 | 154.3 | 100.4 | 160.6 | 199.3 | 180.1 | 132.3 | 140.4 | 124.1 | 1710.4 | |
| 148.3 | 145.4 | 210.0 | 203.7 | 173.9 | 87.8 | 151.5 | 258.5 | 184.0 | 95.3 | 138.8 | 116.5 | 1913.7 | |
| 117.5 | 87.5 | 133.2 | 134.7 | 168.8 | 100.0 | 176.5 | 233.7 | 198.9 | 185.7 | 115.5 | 117.1 | 1769.1 | |
| 107.0 | 115.8 | 147.6 | 114.7 | 191.6 | 92.9 | 203.8 | 200.9 | 145.7 | 125.9 | 111.1 | 82.5 | 1639.5 | |
| 109.5 | 94.8 | 125.0 | 146.4 | 167.1 | 137.1 | 168.9 | 191.6 | 178.6 | 132.4 | 121.4 | 77.2 | 1650.0 | |
| 86.8 | 120.9 | 169.7 | 136.3 | 147.4 | 66.6 | 151.4 | 200.0 | 206.7 | 108.6 | 103.6 | 72.2 | 1570.2 | |
| 107.0 | 95.2 | 102.7 | 143.8 | 189.8 | 110.3 | 201.9 | 200.9 | 170.3 | 130.4 | 86.8 | 115.8 | 1654.9 | |
| 76.0 | 88.0 | 133.3 | 168.7 | 199.7 | 83.4 | 208.1 | 155.4 | 139.5 | 159.0 | 116.0 | 112.8 | 1639.9 | |
| 81.5 | 89.6 | 133.5 | 152.6 | 146.4 | 141.0 | 270.8 | 250.2 | 142.4 | 109.7 | 130.1 | 133.7 | 1781.5 | |
| 120.0 | 105.2 | 134.3 | 160.6 | 208.9 | 168.6 | 161.8 | 212.4 | 165.5 | 135.8 | 71.3 | 141.7 | 1786.1 | |
| 107.1 | 118.7 | 128.8 | 148.4 | 182.6 | 116.9 | 162.9 | 166.0 | 161.4 | 185.9 | 137.4 | 138.8 | 1754.9 | |
| 149.4 | 109.4 | 134.9 | 172.4 | 195.7 | 142.3 | 231.7 | 187.6 | 124.3 | 171.8 | 103.3 | 132.8 | 1855.6 | |
| 127.3 | 84.2 | 156.8 | 173.1 | 199.7 | 105.8 | 113.0 | 175.7 | 138.8 | 134.8 | 103.7 | 112.4 | 1625.3 | |
| 115.5 | 130.9 | 132.4 | 136.1 | 150.0 | 165.3 | 132.8 | 226.8 | 146.5 | 139.5 | 128.4 | 114.4 | 1718.6 | |
| 86.7 | 108.1 | 153.2 | 166.6 | 158.7 | 93.5 | 220.3 | 282.5 | 175.0 | 122.0 | 139.7 | 114.0 | 1820.3 | |
| 112.0 | 103.8 | 73.9 | 194.8 | 184.3 | 68.9 | 197.6 | 271.2 | 172.8 | 150.3 | 144.6 | 110.2 | 1784.4 | |
| 50.6 | 75.9 | 112.1 | 159.4 | 166.8 | 135.6 | 133.3 | 255.6 | 154.3 | 114.3 | 73.4 | 112.2 | 1543.5 | |
| 70.6 | 74.4 | 92.4 | 172.0 | 159.6 | 142.5 | 121.7 | 180.4 | 111.2 | 98.0 | 90.9 | 84.4 | 1398.1 | |
| 105.8 | 74.9 | 68.9 | 148.1 | 166.7 | 115.4 | 93.1 | 169.1 | 80.7 | 114.0 | 131.4 | 119.8 | 1387.9 | |
| 128.7 | 87.9 | 132.3 | 163.8 | 97.9 | 99.9 | 110.8 | 199.3 | 169.2 | 103.6 | 96.1 | 113.0 | 1502.5 | |
| 64.1 | 59.3 | 116.0 | 149.9 | 145.6 | 115.5 | 147.9 | 191.4 | 194.2 | 132.2 | 119.0 ) | 126.3 | 1561.4 | |
| 86.7 | 118.3 | 111.8 | 131.8 | 115.9 | 80.2 | 114.8 | 175.4 | 107.6 | 88.3 | 123.4 | 112.6 | 1366.8 | |
| 100.6 | 83.7 | 33.2 ) | 160.2 ) | 168.5 | 94.6 | 124.6 | 197.1 ) | 127.4 | 109.6 | 93.9 | 82.8 | 1376.2 | |
| 54.9 | 85.5 | 95.5 | 176.2 | 163.3 | 124.3 | 66.9 | 134.8 | 139.7 | 117.7 | 111.8 | 70.4 | 1341.0 | |
| 93.4 | 72.2 | 116.2 | 144.7 | 157.8 | 91.6 | 172.4 | 231.7 | 136.1 | 100.1 | 99.7 | 82.8 | 1498.7 | |
| 71.7 | 83.3 | 116.3 | 127.5 | 144.3 | 128.5 | 136.7 | 255.8 | 127.4 | 110.3 | 120.2 | 116.3 | 1538.3 | |
| 100.5 | 94.9 | 93.7 | 169.0 | 148.7 | 81.2 | 175.2 | 203.5 | 117.6 | 124.4 | 89.1 | 134.5 | 1532.3 | |
| 87.8 | 107.9 | 140.3 | 184.5 | 138.0 | 88.6 | 89.5 | 185.4 | 160.9 | 157.7 | 95.0 | 100.1 | 1535.7 | |
| 69.1 | 75.5 | 125.9 | 116.9 | 83.5 | 68.3 | 108.5 | 160.4 | 102.5 | 95.1 | 130.7 | 117.5 | 1253.9 | |
| 104.9 | 102.6 | 91.0 | 144.4 | 163.1 | 85.8 | 139.1 | 193.2 | 168.7 ) | 132.1 | 121.7 | 106.4 | 1553.0 | |
| 98.3 | 81.7 | 140.2 | 163.0 | 146.9 | 84.3 | 163.7 | 220.0 | 148.4 | 92.7 | 83.3 | 109.5 | 1532.0 | |
| 72.9 | 109.8 | 116.1 | 128.7 | 136.4 | 71.2 | 246.4 | 152.2 | 125.9 | 115.8 | 99.0 | 112.5 | 1486.9 | |
| 74.2 | 94.9 | 128.5 | 137.6 | 138.9 | 106.3 | 140.3 | 183.4 | 137.7 | 116.9 | 63.7 | 63.9 | 1386.3 | |
| 67.8 | 65.8 | 97.6 | 95.5 | 102.7 | 77.6 | 89.0 | 132.9 | 163.3 | 107.3 | 54.1 | 91.8 | 1145.4 | |
| 81.7 | 111.9 | 123.6 | 166.3 | 95.1 | 98.6 | 143.2 | 139.2 | 177.6 | 97.9 | 138.1 | 126.7 | 1499.9 | |
| 68.1 | 65.9 | 143.7 | 172.5 | 163.9 | 57.7 | 96.6 | 181.6 | 158.3 | 92.1 | 117.4 | 85.6 | 1403.4 | |
| 100.7 | 59.6 | 117.2 | 98.5 ) | 94.0 ) | 76.5 | 89.5 | 165.6 | 123.3 | 139.4 | 111.6 | 81.9 | 1257.8 | |
| 80.3 | 103.8 | 144.0 | 143.0 | 183.9 | 163.3 | 61.8 | 201.4 | 121.2 | 107.3 | 98.2 | 116.2 | 1524.4 | |
| 85.2 | 96.6 | 125.0 | 154.4 | 117.0 ) | 58.8 | 198.3 | 201.0 | 160.1 | 109.1 | 119.7 | 141.4 | 1566.6 | |
| 106.8 | 103.9 | 140.7 | 182.0 | 154.0 | 90.9 | 66.8 | 132.8 ) | 131.8 ) | 83.6 | 117.3 | 109.7 | 1420.3 | |
| 111.0 | 62.6 | 118.7 ) | 95.2 | 172.0 | 76.4 | 120.9 | 198.2 | 178.2 | 80.1 | 107.5 | 104.1 | 1424.9 | |
| 79.5 | 100.5 | 157.0 | 157.0 | 112.8 | 57.3 ) | 133.3 | 172.0 | 139.4 | 105.1 | 116.4 | 82.3 | 1412.6 | |
| 60.5 | 57.9 | 124.8 | 131.7 | 177.9 | 44.7 | 164.9 | 230.1 | 151.2 | 115.9 | 112.0 | 89.5 | 1461.1 | |
| 109.6 | 78.2 ) | 131.7 | 145.0 | 202.9 | 78.3 | 155.6 | 206.7 | 168.1 | 138.3 | 111.8 | 103.9 | 1630.1 | |
| 136.4 | 77.3 ) | 133.7 ) | 146.6 | 202.3 | 96.4 ) | 119.1 | 179.5 | 128.6 | 100.4 | 84.7 | 76.8 | 1481.8 | |
| 78.7 | 93.6 | 146.0 | 118.8 | 169.6 | 81.9 | 164.2 | 214.8 | 137.8 | 167.3 | 63.5 | 85.6 | 1521.8 | |
| 94.0 | 85.5 | 109.5 | 103.9 | 187.3 | 109.2 | 157.8 | 197.7 | 142.6 | 116.8 | 127.8 | 130.6 | 1562.7 | |
| 105.1 | 123.9 | 122.7 | 162.8 | 175.7 | 123.0 | 242.3 | 189.0 | 119.7 | 67.9 | 103.6 | 85.8 | 1621.5 | |
| 77.6 | 92.7 | 161.9 | 175.3 | 166.5 | 84.5 | 244.6 | 184.7 | 115.6 | 105.1 | 93.4 | 68.9 | 1570.8 | |
| 76.9 | 82.7 | 112.3 | 145.5 | 185.5 | 116.1 | 105.3 | 194.2 | 137.4 | 96.2 | 98.5 ) | 88.4 | 1439.0 | |
| 66.6 ) | 84.6 | 116.9 | 191.9 | 141.2 | 75.0 | 68.8 | 232.9 ) | 135.0 | 103.5 | 144.7 | 71.7 | 1432.8 | |
| 87.9 | 103.7 | 152.4 | 168.9 | 112.2 | 106.1 | 145.0 | 144.4 | 116.9 | 114.8 | 120.4 | 86.6 | 1459.3 | |
| 70.1 ) | 74.9 | 124.9 | 105.8 | 123.7 | 107.1 | 176.2 ) | 183.1 | 137.4 | 102.7 | 112.9 | 62.5 | 1381.3 | |
| 82.0 | 103.6 | 130.0 | 142.9 | 177.2 | 113.6 | 204.8 | 215.0 | 187.6 | 152.3 ) | 105.6 | 91.4 | 1706.0 | |
| 98.6 | 76.7 | 124.9 | 102.9 | 143.4 | 100.6 | 143.2 | 241.2 | 141.6 | 109.4 | 86.0 | 100.2 | 1468.7 | |
| 86.1 | 84.0 | 103.1 | 163.6 | 2.8 ] | 439.6 ] |
- 値欄の記号の説明
- 赤線は、観測場所を移転した場合、観測装置を変更した場合または観測の時間間隔を変更した場合に、その前後のデータが均質でないことを示します。
赤実線の前後では観測データや観測史上1位などの極値を比較できませんが、赤点線の前後では極値を比較できます。 - 最新の月のデータは稀に更新されない場合があります。年の数字をクリックして表示される「月ごとの値」もご確認ください。