年ごとの値
小樽(後志地方) 年ごとの値 詳細(日照・雪・その他)
年 | 日照時間(h) | 全天日射量 (MJ/m2) | 蒸気圧 (hPa) | 雪(寒候年・cm) | 雲量 | 大気現象 | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
合計 | 日照率 | 各階級の日数 | 降雪 | 各階級の日数(降雪) | 最深積雪 | 各階級の日数(最深積雪) | 平均 | 各階級の日数 | 雪日数 (寒候年) | 霧日数 | 雷日数 | |||||||||||||||||||
不照 | 日照率 ≧40% | 平均 | 合計 | 日合計の最大 | ≧3cm | ≧5cm | ≧10cm | ≧20cm | ≧50cm | ≧100cm | 値 | 日 | ≧0cm | ≧1cm | ≧5cm | ≧10cm | ≧20cm | ≧50cm | ≧100cm | <1.5 | ≧8.5 | |||||||||
値 | 日 | |||||||||||||||||||||||||||||
1759.2 | 40 | 50 | 134 ] | 2/19 | 100 ] | 95 ] | 95 ] | 94 ] | 92 ] | 87 ] | 37 ] | 86 ] | 14 | 8 | ||||||||||||||||
1778.5 | 40 | 46 | 128 | 2/2 | 159 | 155 | 147 | 138 | 126 | 88 | 53 | 129 | 27 | 5 | ||||||||||||||||
1547.7 | 35 | 88 | 173 | 2/19 | 151 | 149 | 134 | 132 | 127 | 113 | 73 | 130 | 41 | 1 | ||||||||||||||||
1774.8 | 40 | 60 | 150 | 2/21 | 144 | 138 | 129 | 120 | 115 | 100 | 74 | 121 | 17 | 11 | ||||||||||||||||
1573.6 | 35 | 62 | 116 | 2/14 * | 139 | 134 | 128 | 126 | 120 | 104 | 33 | 125 | 14 | 4 | ||||||||||||||||
1675.3 | 38 | 64 | 150 | 3/3 * | 148 | 147 | 144 | 140 | 135 | 110 | 63 | 128 | 22 | 8 | ||||||||||||||||
1539.8 | 35 | 64 | 59 | 3/23 | 145 | 144 | 125 | 111 | 86 | 3 | 0 | 117 | 23 | 6 | ||||||||||||||||
1706.6 | 38 | 65 | 120 | 2/19 | 136 | 132 | 125 | 119 | 112 | 98 | 15 | 113 | 23 | 4 | ||||||||||||||||
1728.9 | 39 | 51 | 9.6 | 136 | 2/14 | 143 | 143 | 135 | 132 | 116 | 88 | 45 | 7.0 | 127 | 16 | 8 | ||||||||||||||
1839.1 | 41 | 42 | 9.6 | 93 | 3/5 | 133 | 133 | 125 | 115 | 95 | 69 | 0 | 7.0 | 119 | 20 | 6 | ||||||||||||||
1799.3 | 41 | 46 | 9.4 | 336 ] | 32 ] | 1/3 | 31 ] | 23 ] | 11 ] | 3 ] | 0 ] | 0 ] | 120 | 2/18 | 137 | 137 | 122 | 113 | 101 | 78 | 10 | 6.9 | 135 | 18 | 14 | |||||
1623.9 | 37 | 61 | 9.2 | 639 | 80 | 1/29 | 52 | 34 | 18 | 6 | 2 | 0 | 172 | 1/31 | 148 | 147 | 141 | 140 | 117 | 70 | 27 | 7.0 | 133 | 22 | 5 | |||||
1715.2 | 39 | 56 | 10.0 | 702 | 36 | 3/3 | 64 | 50 | 27 | 8 | 0 | 0 | 151 | 2/21 | 133 | 128 | 120 | 115 | 108 | 95 | 53 | 7.0 | 123 | 19 | 7 | |||||
1663.7 | 37 | 66 | 9.2 | 447 | 24 | 1/15 | 49 | 37 | 15 | 2 | 0 | 0 | 80 | 3/8 | 135 | 132 | 118 | 93 | 82 | 52 | 0 | 6.9 | 119 | 23 | 4 | |||||
1675.2 | 38 | 63 | 9.5 | 640 | 28 | 12/10 | 70 | 49 | 25 | 5 | 0 | 0 | 128 | 2/27 | 148 | 147 | 142 | 139 | 132 | 116 | 70 | 7.0 | 129 | 11 | 3 | |||||
1687.6 | 38 | 60 | 9.5 | 506 | 37 | 3/5 | 47 | 39 | 17 | 6 | 0 | 0 | 128 | 3/5 | 130 | 127 | 120 | 114 | 104 | 76 | 18 | 7.1 | 122 | 17 | 3 | |||||
1685.6 | 38 | 58 | 9.9 | 278 | 18 | 1/31 | 33 | 21 | 7 | 0 | 0 | 0 | 51 | 1/23 | 111 | 102 | 86 | 71 | 56 | 2 | 0 | 7.1 | 107 | 9 | 12 | |||||
1672.8 | 38 | 66 | 9.5 | 528 | 33 | 1/29 | 52 | 37 | 19 | 5 | 0 | 0 | 112 | 1/29 | 141 | 137 | 128 | 122 | 105 | 67 | 2 | 7.0 | 129 | 14 | 5 | |||||
1696.0 | 38 | 67 | 176 | 10.3 | 442 | 21 | 2/12 | 45 | 31 | 16 | 3 | 0 | 0 | 108 | 2/18 | 130 | 127 | 125 | 120 | 104 | 70 | 9 | 6.9 | 24 | 145 | 126 | 15 | 9 | ||
1775.8 | 40 | 53 | 186 | 9.9 | 515 | 31 | 1/28 | 61 | 40 | 17 | 3 | 0 | 0 | 102 | 1/28 | 136 | 133 | 122 | 111 | 86 | 63 | 1 | 7.2 | 24 | 154 | 119 | 9 | 4 | ||
1754.3 | 40 | 42 | 169 | 9.9 | 421 | 31 | 1/14 | 40 | 29 | 16 | 4 | 0 | 0 | 76 | 2/19 | 124 | 123 | 100 | 90 | 72 | 15 | 0 | 7.1 | 29 | 171 | 101 | 14 | 8 | ||
1670.4 | 38 | 52 | 164 | 9.5 | 493 | 24 | 2/5 | 46 | 38 | 17 | 6 | 0 | 0 | 98 | 2/24 | 131 | 129 | 125 | 116 | 101 | 44 | 0 | 7.3 | 20 | 171 | 120 | 6 | 2 | ||
1698.9 | 38 | 49 | 176 | 9.4 | 684 | 36 | 12/10 | 69 | 50 | 23 | 7 | 0 | 0 | 135 | 3/6 | 148 | 146 | 133 | 130 | 123 | 85 | 29 | 7.3 | 22 | 168 | 135 | 12 | 8 | ||
1598.9 | 36 | 60 | 158 | 9.7 | 651 | 33 | 1/31 | 63 | 45 | 23 | 6 | 0 | 0 | 134 | 1/31 | 152 | 147 | 132 | 125 | 113 | 82 | 36 | 7.5 | 20 | 183 | 130 | 16 | 7 | ||
1816.9 | 41 | 49 | 184 | 9.8 | 629 | 35 | 1/7 | 59 | 44 | 24 | 6 | 0 | 0 | 120 | 2/13 | 136 | 132 | 125 | 118 | 110 | 86 | 22 | 7.0 | 33 | 157 | 120 | 7 | 4 | ||
1759.2 | 40 | 43 | 177 | 9.9 | 594 | 45 | 1/28 | 57 | 42 | 19 | 5 | 0 | 0 | 141 | 2/3 | 140 | 139 | 118 | 107 | 97 | 75 | 48 | 7.0 | 27 | 160 | 109 | 6 | 5 | ||
1704.4 | 38 | 54 | 164 | 9.1 | 492 | 24 | 1/7 | 45 | 35 | 20 | 3 | 0 | 0 | 90 | 2/6 * | 122 | 121 | 107 | 99 | 93 | 62 | 0 | 7.3 | 26 | 158 | 114 | 10 | 7 | ||
1910.3 | 43 | 48 | 195 | 9.7 | 653 | 54 | 1/31 | 69 | 54 | 21 | 4 | 1 | 0 | 125 | 3/25 | 148 | 145 | 141 | 135 | 127 | 90 | 19 | 7.0 | 34 | 163 | 134 | 7 | 4 | ||
1789.2 | 40 | 46 | 171 | 9.2 | 488 | 21 | 1/22 * | 55 | 41 | 20 | 2 | 0 | 0 | 88 | 3/12 * | 138 | 132 | 127 | 124 | 117 | 74 | 0 | 7.4 | 19 | 181 | 118 | 7 | 0 | ||
1960.6 | 44 | 52 | 196 | 9.8 | 622 | 43 | 12/12 | 56 | 43 | 21 | 8 | 0 | 0 | 118 | 2/27 | 136 | 130 | 124 | 117 | 111 | 79 | 7 | 7.1 | 22 | 172 | 108 | 5 | 5 | ||
1880.8 | 42 | 43 | 181 | 9.9 | 461 | 25 | 1/13 | 50 | 33 | 19 | 4 | 0 | 0 | 77 | 3/14 | 130 | 127 | 113 | 110 | 93 | 40 | 0 | 7.4 | 24 | 180 | 113 | 6 | 5 | ||
1719.5 | 39 | 45 | 172 | 9.3 | 639 | 30 | 2/23 | 71 | 54 | 25 | 4 | 0 | 0 | 108 | 2/23 * | 147 | 145 | 141 | 130 | 123 | 86 | 7 | 7.4 | 18 | 171 | 119 | 3 | 6 | ||
1566.0 | 35 | 60 | 161 | 9.7 | 496 | 24 | 1/1 | 53 | 38 | 15 | 4 | 0 | 0 | 92 | 2/2 | 135 | 132 | 123 | 116 | 107 | 90 | 0 | 7.6 | 21 | 181 | 111 | 6 | 15 | ||
1786.9 | 40 | 41 | 169 | 8.6 | 549 | 42 | 2/11 | 57 | 38 | 16 | 7 | 0 | 0 | 108 | 2/11 | 138 | 135 | 131 | 119 | 112 | 76 | 2 | 7.1 | 29 | 159 | 119 | 7 | 6 | ||
1863.8 | 42 | 35 | 191 | 9.4 | 601 | 25 | 12/23 | 55 | 43 | 25 | 4 | 0 | 0 | 99 | 2/4 | 145 | 141 | 124 | 120 | 104 | 64 | 0 | 7.1 | 25 | 156 | 133 | 12 | 8 | ||
1974.1 | 44 | 41 | 193 | 9.6 | 508 | 23 | 3/1 | 61 | 43 | 17 | 3 | 0 | 0 | 108 | 3/5 * | 134 | 128 | 116 | 113 | 106 | 67 | 12 | 7.4 | 26 | 171 | 116 | 16 | 11 | ||
2020.7 | 46 | 41 | 199 | 9.2 | 392 | 34 | 2/6 | 45 | 35 | 11 | 2 | 0 | 0 | 82 | 2/9 | 134 | 127 | 107 | 92 | 72 | 25 | 0 | 7.4 | 18 | 176 | 115 | 8 | 5 | ||
1826.0 | 41 | 48 | 172 | 9.0 | 554 | 32 | 1/13 | 55 | 43 | 20 | 3 | 0 | 0 | 114 | 2/22 | 142 | 135 | 118 | 97 | 89 | 68 | 5 | 7.6 | 25 | 180 | 122 | 11 | 5 | ||
1837.0 | 41 | 49 | 179 | 9.0 | 717 | 36 | 12/5 | 63 | 53 | 31 | 7 | 0 | 0 | 157 | 2/23 | 142 | 140 | 132 | 129 | 124 | 94 | 57 | 7.7 | 17 | 195 | 108 | 5 | 6 | ||
2045.4 | 46 | 36 | 191 | 9.3 | 784 | 34 | 2/4 | 68 | 54 | 29 | 10 | 0 | 0 | 155 | 2/8 | 163 | 160 | 151 | 151 | 128 | 101 | 51 | 7.3 | 31 | 184 | 133 | 1 | 10 | ||
1833.6 | 41 | 45 | 179 | 9.1 | 460 | 36 | 2/26 | 49 | 35 | 13 | 3 | 0 | 0 | 125 | 3/9 | 132 | 129 | 126 | 117 | 108 | 65 | 5 | 7.5 | 23 | 196 | 108 | 5 | 11 | ||
2173.7 | 49 | 28 | 212 | 9.3 | 532 | 24 | 1/20 * | 57 | 40 | 16 | 5 | 0 | 0 | 111 | 3/13 | 154 | 147 | 134 | 121 | 108 | 90 | 25 | 7.3 | 25 | 169 | 123 | 5 | 3 | ||
2029.3 | 46 | 39 | 204 | 9.3 | 451 | 28 | 1/29 | 48 | 33 | 15 | 5 | 0 | 0 | 102 | 2/16 | 132 | 123 | 111 | 106 | 99 | 72 | 3 | 7.3 | 26 | 183 | 120 | 4 | 5 | ||
1627.2 | 37 | 42 | 144 | 9.0 | 670 | 37 | 1/6 | 66 | 47 | 23 | 7 | 0 | 0 | 118 | 1/28 | 149 | 146 | 144 | 130 | 121 | 103 | 34 | 7.7 | 24 | 196 | 133 | 6 | 10 | ||
1605.6 | 36 | 48 | 148 | 9.4 | 559 | 26 | 2/25 | 51 | 40 | 22 | 6 | 0 | 0 | 139 | 2/28 | 157 | 154 | 143 | 140 | 121 | 95 | 25 | 7.5 | 20 | 190 | 135 | 8 | 7 | ||
1697.1 | 38 | 41 | 155 | 9.4 | 659 | 38 | 12/2 | 58 | 40 | 26 | 9 | 0 | 0 | 135 | 2/13 | 142 | 141 | 134 | 127 | 126 | 98 | 31 | 7.6 | 15 | 181 | 120 | 7 | 8 | ||
1700.5 | 38 | 44 | 153 | 10.0 | 510 | 34 | 12/11 | 43 | 35 | 21 | 4 | 0 | 0 | 101 | 2/5 | 132 | 121 | 115 | 109 | 102 | 79 | 2 | 7.6 | 15 | 188 | 111 | 4 | 3 | ||
1807.2 | 41 | 41 | 172 | 10.3 | 601 | 47 | 12/9 | 54 | 46 | 21 | 5 | 0 | 0 | 141 | 1/31 * | 126 | 121 | 118 | 112 | 109 | 90 | 25 | 7.2 | 34 | 181 | 92 | 3 | 10 | ||
1745.2 | 39 | 42 | 160 | 9.7 | 607 | 31 | 2/16 | 53 | 43 | 28 | 4 | 0 | 0 | 123 | 2/16 | 132 | 130 | 125 | 120 | 105 | 87 | 16 | 7.5 | 16 | 185 | 106 | 4 | 5 | ||
1518.3 | 34 | 47 | 132 | 9.5 | 582 | 38 | 12/12 | 58 | 42 | 21 | 4 | 0 | 0 | 110 | 2/23 | 3 ] | 134 | 127 | 116 | 106 | 82 | 13 | 7.5 ] | 32 ] | 168 ] | 2 ] | 1 ] | 2 ] | ||
1437.5 | 32 | 58 | 131 | 9.1 | 519 | 30 | 1/21 | 51 | 41 | 17 | 6 | 0 | 0 | 123 | 2/20 | 141 | 138 | 132 | 119 | 110 | 68 | 20 | 8.1 | 16 | 242 | 116 | 0 | 5 | ||
1735.6 | 39 | 43 | 159 | 10.0 | 732 | 46 | 1/12 | 67 | 48 | 28 | 7 | 0 | 0 | 139 | 2/13 | 146 | 145 | 142 | 125 | 116 | 94 | 52 | 7.7 | 27 | 222 | 111 | 1 | 3 | ||
1471.9 | 33 | 52 | 140 | 9.8 | 515 | 25 | 12/28 * | 56 | 41 | 20 | 4 | 0 | 0 | 107 | 3/2 | 138 | 137 | 127 | 123 | 112 | 76 | 4 | 7.9 | 25 | 241 | 101 | 0 | 1 | ||
1474.1 | 33 | 47 | 136 | 9.2 | 694 | 84 | 1/8 | 63 | 47 | 20 | 8 | 1 | 0 | 149 | 2/10 | 142 | 141 | 136 | 132 | 126 | 115 | 73 | 8.1 | 18 | 255 | 119 | 1 | 3 | ||
1559.0 | 35 | 62 | 139 | 9.5 | 545 | 26 | 12/18 | 63 | 46 | 18 | 2 | 0 | 0 | 121 | 2/21 | 143 | 142 | 134 | 130 | 112 | 68 | 6 | 7.8 | 27 | 228 | 119 | 1 | 2 | ||
1568.1 | 35 | 50 | 141 | 9.8 | 459 | 28 | 2/14 | 50 | 39 | 14 | 4 | 0 | 0 | 99 | 2/15 | 125 | 123 | 119 | 115 | 104 | 79 | 0 | 7.6 | 35 | 218 | 95 | 1 | 0 | ||
1588.2 | 36 | 33 | 145 | 9.9 | 786 | 40 | 2/18 | 77 | 62 | 30 | 7 | 0 | 0 | 142 | 3/4 | 107 ] | 158 | 156 | 154 | 152 | 119 | 58 | 9.0 ] | 0 ] | 46 ] | 29 ] | 5 ] | 0 ] | ||
1403.5 | 32 | 49 | 129 | 9.9 | 792 | 29 | 12/3 | 84 | 66 | 29 | 4 | 0 | 0 | 143 | 2/25 | 146 | 143 | 139 | 132 | 98 | 47 | 129 | 5 | |||||||
1590.6 | 36 | 43 | 139 | 9.1 | 665 | 35 | 11/27 | 83 | 50 | 17 | 3 | 0 | 0 | 97 | 2/8 | 140 | 135 | 134 | 131 | 89 | 0 | 134 | 2 | |||||||
1586.5 | 36 | 56 | 144 | 9.1 | 528 | 28 | 3/24 | 60 | 44 | 18 | 3 | 0 | 0 | 66 | 2/15 | 122 | 117 | 115 | 105 | 37 | 0 | 108 | 6 | |||||||
1666.4 | 38 | 56 | 162 | 8.9 | 688 | 28 | 11/21 | 70 | 50 | 28 | 4 | 0 | 0 | 112 | 2/27 | 137 | 130 | 123 | 116 | 96 | 13 | 129 | 6 | |||||||
1606.8 | 36 | 52 | 154 | 9.3 | 546 | 31 | 12/27 | 67 | 48 | 16 | 3 | 0 | 0 | 99 | 2/27 * | 128 | 123 | 117 | 94 | 75 | 0 | 123 | 2 | |||||||
1567.1 | 35 | 63 | 152 | 9.3 | 732 | 31 | 1/4 | 72 | 56 | 29 | 6 | 0 | 0 | 153 | 3/4 * | 144 | 137 | 129 | 117 | 98 | 64 | 132 | 2 | |||||||
1556.7 | 35 | 58 | 144 | 9.3 | 725 | 41 | 2/10 | 65 | 49 | 25 | 10 | 0 | 0 | 172 | 2/10 | 143 | 136 | 132 | 128 | 116 | 74 | 139 | 3 | |||||||
1692.8 | 38 | 44 | 156 | 9.2 | 505 | 28 | 3/7 | 55 | 41 | 20 | 3 | 0 | 0 | 92 | 3/19 | 135 | 132 | 125 | 112 | 59 | 0 | 131 | 2 | |||||||
1710.7 | 38 | 53 | 160 | 9.3 | 465 | 35 | 12/15 | 45 | 37 | 19 | 3 | 0 | 0 | 126 | 2/24 | 127 | 113 | 105 | 102 | 63 | 13 | 112 | 4 | |||||||
1472.4 | 33 | 56 | 136 | 9.0 | 640 | 27 | 12/6 | 65 | 55 | 29 | 6 | 0 | 0 | 87 | 2/8 | 138 | 131 | 119 | 101 | 60 | 0 | 115 | 4 | |||||||
1402.1 | 32 | 62 | 124 | 10.3 | 624 | 24 | 12/18 | 77 | 54 | 20 | 2 | 0 | 0 | 102 | 2/20 | 129 | 123 | 115 | 111 | 86 | 1 | 132 | 12 | |||||||
1549.8 | 35 | 47 | 152 | 9.7 | 701 | 36 | 2/10 | 68 | 53 | 28 | 4 | 0 | 0 | 133 | 2/20 | 132 | 129 | 127 | 113 | 90 | 36 | 123 | 7 | |||||||
1539.9 | 35 | 48 | 145 | 10.1 | 702 | 31 | 2/18 | 85 | 60 | 21 | 4 | 0 | 0 | 125 | 2/18 | 149 | 141 | 137 | 125 | 97 | 16 | 134 | 5 | |||||||
1466.5 | 33 | 50 | 139 | 10.2 | 676 | 30 | 12/18 | 69 | 53 | 25 | 4 | 0 | 0 | 155 | 3/10 | 147 | 137 | 135 | 131 | 111 | 66 | 156 | 3 | |||||||
1715.5 | 39 | 39 | 162 | 9.9 | 670 | 34 | 12/13 | 66 | 49 | 27 | 7 | 0 | 0 | 148 | 3/12 * | 140 | 139 | 131 | 121 | 97 | 68 | 127 | 4 | |||||||
1646.0 | 37 | 52 | 162 | 10.1 | 585 | 36 | 12/26 | 51 | 40 | 21 | 7 | 0 | 0 | 140 | 2/14 | 127 | 125 | 122 | 120 | 96 | 54 | 124 | 0 | |||||||
1680.0 | 38 | 41 | 154 | 10.3 | 495 | 32 | 1/14 | 55 | 40 | 16 | 3 | 0 | 0 | 89 | 2/24 * | 124 | 116 | 112 | 99 | 62 | 0 | 143 | 2 | |||||||
1640.6 | 37 | 47 | 153 | 10.0 | 501 | 30 | 12/10 | 64 | 38 | 13 | 5 | 0 | 0 | 103 | 2/26 | 139 | 128 | 120 | 118 | 102 | 3 | 146 | 6 | |||||||
1560.7 | 35 | 54 | 142 | 10.2 | 570 | 26 | 12/5 * | 63 | 50 | 13 | 6 | 0 | 0 | 134 | 2/18 | 141 | 139 | 130 | 122 | 99 | 39 | 148 | 10 | |||||||
1805.1 | 41 | 41 | 168 | 10.4 | 394 | 23 | 12/7 | 53 | 32 | 12 | 2 | 0 | 0 | 92 | 2/7 | 120 | 111 | 104 | 90 | 54 | 0 | 133 | 5 | |||||||
1628.0 | 37 | 46 | 152 | 10.8 | 451 | 26 | 3/16 | 55 | 40 | 11 | 3 | 0 | 0 | 69 | 2/11 | 127 | 113 | 100 | 68 | 25 | 0 | 138 | 4 | |||||||
1857.7 | 42 | 38 | 177 | 10.8 | 406 | 20 | 3/2 | 47 | 35 | 12 | 1 | 0 | 0 | 104 | 3/3 | 117 | 106 | 104 | 96 | 63 | 2 | 120 | 11 | |||||||
1717.6 | 39 | 37 | 159 | 10.7 | 524 | 52 | 12/17 | 53 | 39 | 16 | 3 | 1 | 0 | 132 | 2/23 | 127 | 120 | 115 | 112 | 99 | 43 | 123 | 12 | |||||||
1792.4 | 40 | 31 | 165 | 11.8 | 532 | 49 | 1/10 | 55 | 42 | 17 | 3 | 0 | 0 | 124 | 2/26 | 117 | 116 | 112 | 101 | 64 | 19 | 118 | 2 | |||||||
1707.3 | 38 | 47 | 161 | 11.0 | 520 | 69 | 1/7 | 46 | 37 | 15 | 3 | 1 | 0 | 116 | 2/11 | 132 | 121 | 115 | 103 | 83 | 9 | 127 | 2 | |||||||
438.4 ] | 32 ] | 17 ] | 45 ] | 5.2 ] | 489 ] | 25 ] | 1/30 | 55 ] | 38 ] | 19 ] | 5 ] | 0 ] | 0 ] | 119 ] | 2/23 * | 133 ] | 126 ] | 122 ] | 115 ] | 56 ] | 21 ] | 127 ] | 0 ] |
- 寒候年とは、前年8月1日から当年7月31日までの期間のことです。例えば、2008年寒候年は2007年8月1日から2008年7月31日までの期間を示します。
- 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。