旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
根室（根室地方) 2021年（旬ごとの値） 詳細（気圧・降水量）
| 月 | 旬 | 気圧(hPa) | 降水量(mm) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 現地 | 海面 | 合計 | 最大 | 各階級の日数 | ||||||||||||||||
| 平均 | 平均 | 最低 | 日 | 1時間 | 10分間 | ≧0.0mm | ≧0.5mm | ≧1.0mm | ≧10.0mm | ≧30.0mm | ≧50.0mm | ≧70.0mm | ≧100.0mm | |||||||
| 値 | 日 | 値 | 日 | 値 | 日 | 値 | 日 | |||||||||||||
| 上旬 | 1006.5 | 1009.9 | 984.7 | 08 | 12.5 ) | 6.0 ) | 08 | 1.0 ) | 09* | 0.5 ) | 09* | 5 | 3 ) | 3 ) | 0 ) | 0 ) | 0 ) | 0 ) | 0 ) | |
| 中旬 | 1010.0 | 1013.5 | 998.6 | 16 | 11.0 | 4.0 | 16 | 3.0 | 16 | 1.0 | 16 | 8 | 6 | 5 | 0 | 0 | 0 | 0 | 0 | |
| 下旬 | 1013.0 | 1016.5 | 992.4 | 30 | 13.5 | 6.5 | 30 | 2.0 | 29 | 1.0 | 29 | 8 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | |
| 上旬 | 1003.6 | 1007.0 | 990.2 | 02 | 0.5 | 0.5 | 02 | 0.5 | 02 | 0.5 | 02 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 中旬 | 1000.0 | 1003.4 | 947.8 | 16 | 25.5 | 15.5 | 15 | 7.0 | 16 | 2.0 | 16 | 5 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | |
| 下旬 | 1010.7 | 1014.1 | 993.8 | 21 | 3.5 | 3.0 | 23 | 1.0 | 23 | 0.5 | 27* | 6 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | |
| 上旬 | 1016.7 | 1020.1 | 1003.1 | 02 | 52.0 | 43.5 | 02 | 4.5 | 02 | 1.5 | 02 | 7 | 4 | 4 | 1 | 1 | 0 | 0 | 0 | |
| 中旬 | 1011.2 | 1014.7 | 997.9 | 17 | 9.5 | 9.5 | 14 | 3.0 | 14 | 1.0 | 14 | 4 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | |
| 下旬 | 1008.7 | 1012.1 | 992.2 | 22 | 86.5 | 43.5 | 29 | 5.5 | 21 | 1.5 | 29* | 6 | 5 | 5 | 2 | 2 | 0 | 0 | 0 | |
| 上旬 | 1015.5 | 1018.9 | 1006.1 | 08 | 19.5 | 17.0 | 04 | 2.0 | 04 | 1.0 | 04 | 6 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | |
| 中旬 | 1011.1 | 1014.5 | 986.7 | 19 | 31.5 | 18.0 | 18 | 9.0 | 18 | 3.0 | 18 | 6 | 4 | 4 | 1 | 0 | 0 | 0 | 0 | |
| 下旬 | 1010.5 | 1013.9 | 974.4 | 30 | 37.0 | 34.5 | 30 | 9.0 | 30 | 2.5 | 30 | 6 | 3 | 2 | 1 | 1 | 0 | 0 | 0 | |
| 上旬 | 1001.8 | 1005.1 | 993.2 | 01 | 7.0 | 3.5 | 09 | 3.5 | 09 | 2.0 | 09 | 5 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | |
| 中旬 | 1010.5 | 1013.8 | 996.9 | 17 | 39.5 | 26.5 | 17 | 5.0 | 16 | 1.5 | 13 | 6 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | |
| 下旬 | 1002.4 | 1005.6 | 995.6 | 25 | 39.0 | 14.0 | 29 | 8.0 | 29 | 2.0 | 29 | 10 | 8 | 6 | 2 | 0 | 0 | 0 | 0 | |
| 上旬 | 1008.5 | 1011.8 | 996.2 | 05 | 44.5 | 36.0 | 04 | 9.5 | 05 | 3.0 | 05* | 3 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | |
| 中旬 | 1007.7 | 1011.0 | 1004.1 | 20 | 21.0 | 19.0 | 20 | 7.0 | 20 | 2.0 | 20 | 2 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | |
| 下旬 | 1009.1 | 1012.4 | 1003.7 | 21 | 19.0 | 18.5 | 21 | 6.0 | 21 | 1.5 | 21 | 3 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | |
| 上旬 | 1012.1 | 1015.4 | 1009.5 | 06 | 55.0 | 19.0 | 07 | 6.0 | 05 | 2.0 | 06* | 5 | 4 | 4 | 3 | 0 | 0 | 0 | 0 | |
| 中旬 | 1012.7 | 1015.9 | 1009.9 | 18 | 2.0 | 2.0 | 20 | 1.5 | 20 | 1.5 | 20 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | |
| 下旬 | 1008.2 | 1011.3 | 1006.3 | 30 | 2.5 | 2.0 | 27 | 0.5 | 31* | 0.5 | 30* | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | |
| 上旬 | 1006.3 | 1009.4 | 1003.0 | 10 | 91.0 | 78.5 | 10 | 9.5 | 10 | 3.0 | 10 | 7 | 6 | 4 | 1 | 1 | 1 | 1 | 0 | |
| 中旬 | 1014.6 | 1017.9 | 1004.1 | 11 | 33.0 | 16.0 | 18 | 4.0 | 18* | 1.5 | 19 | 3 | 3 | 3 | 2 | 0 | 0 | 0 | 0 | |
| 下旬 | 1008.3 | 1011.5 | 1003.0 | 28 | 40.5 | 19.5 | 23 | 8.0 | 23 | 3.5 | 23 | 5 | 5 | 5 | 2 | 0 | 0 | 0 | 0 | |
| 上旬 | 1014.2 | 1017.4 | 1008.4 | 01 | 29.0 | 28.5 | 09 | 12.5 | 09 | 5.0 | 09 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | |
| 中旬 | 1012.9 | 1016.1 | 1002.3 | 13 | 60.5 | 57.5 | 18 | 8.5 | 18 | 2.5 | 18 | 5 | 4 | 3 | 1 | 1 | 1 | 0 | 0 | |
| 下旬 | 1015.2 | 1018.4 | 1005.7 | 30 | 53.5 | 36.0 | 23 | 32.0 | 23 | 13.5 | 23 | 4 | 4 | 4 | 2 | 1 | 0 | 0 | 0 | |
| 上旬 | 1014.7 | 1018.0 | 1001.5 | 02 | 86.0 | 42.0 | 02 | 8.5 | 02 | 2.5 | 02 | 6 | 6 | 6 | 4 | 1 | 0 | 0 | 0 | |
| 中旬 | 1014.2 | 1017.4 | 1000.8 | 20 | 52.0 | 20.0 | 20* | 15.5 | 11 | 5.5 | 11 | 6 | 5 | 4 | 2 | 0 | 0 | 0 | 0 | |
| 下旬 | 1014.1 | 1017.4 | 1003.4 | 21 | 22.0 | 9.5 | 21 | 4.0 | 22 | 2.0 | 22 | 4 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | |
| 上旬 | 1015.2 | 1018.5 | 986.8 | 10 | 82.0 | 37.0 | 10 | 12.0 | 10 | 3.5 | 10 | 6 | 3 | 3 | 3 | 1 | 0 | 0 | 0 | |
| 中旬 | 1007.8 | 1011.1 | 997.1 | 11 | 9.0 | 6.0 | 19 | 2.5 | 19 | 1.0 | 19 | 6 | 4 | 3 | 0 | 0 | 0 | 0 | 0 | |
| 下旬 | 1008.0 | 1011.3 | 989.0 | 23 | 47.0 | 25.5 | 22 | 7.5 | 23 | 2.0 | 23 | 6 | 4 | 3 | 2 | 0 | 0 | 0 | 0 | |
| 上旬 | 1014.5 | 1017.8 | 981.5 | 01 | 24.5 | 23.5 | 01 | 14.0 | 01 | 6.5 | 01 | 2 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | |
| 中旬 | 1003.7 | 1007.1 | 988.5 | 18 | 11.0 | 7.5 | 18 | 2.0 | 17 | 1.0 | 18* | 5 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | |
| 下旬 | 1003.6 | 1007.0 | 997.0 | 26 | 13.5 | 5.5 | 31 | 3.0 | 23 | 1.0 | 23 | 8 | 5 | 5 | 0 | 0 | 0 | 0 | 0 | |