平年値（旬ごとの値）
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久慈（岩手県) 平年値（旬ごとの値）
| 要素 | 降水量 (mm) | 平均気温 (℃) | 日最高気温 (℃) | 日最低気温 (℃) | 平均風速 (m/s) | 日照時間 (h) | 降雪の深さ合計 (cm) | 最深積雪 (cm) | |
|---|---|---|---|---|---|---|---|---|---|
| 統計期間 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | |
| 資料年数 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | |
| 1月 | 上旬 | 15.7 | 0.1 | 4.3 | -4.0 | 2.4 | 51.6 | 15 | 7 |
| 中旬 | 12.6 | -0.7 | 3.5 | -5.0 | 2.2 | 51.5 | 14 | 8 | |
| 下旬 | 22.7 | -0.8 | 3.6 | -5.1 | 2.3 | 60.2 | 21 | 12 | |
| 2月 | 上旬 | 16.5 | -0.8 | 3.6 | -5.3 | 2.2 | 52.1 | 25 | 17 |
| 中旬 | 21.1 | -0.3 | 4.2 | -4.8 | 2.4 | 53.0 | 22 | 16 | |
| 下旬 | 12.1 | 0.5 | 5.6 | -4.3 | 2.2 | 46.3 | 15 | 12 | |
| 3月 | 上旬 | 26.6 | 1.5 | 6.3 | -3.0 | 2.3 | 55.1 | 18 | 13 |
| 中旬 | 20.8 | 2.9 | 8.3 | -2.2 | 2.4 | 60.1 | 10 | 10 | |
| 下旬 | 21.5 | 4.3 | 9.8 | -1.0 | 2.4 | 69.9 | 7 | 6 | |
| 4月 | 上旬 | 19.2 | 6.4 | 12.1 | 0.7 | 2.4 | 62.2 | 1 | 1 |
| 中旬 | 24.5 | 8.0 | 13.7 | 2.3 | 2.4 | 62.1 | 1 | 0 | |
| 下旬 | 27.3 | 10.0 | 15.8 | 4.1 | 2.2 | 66.0 | 0 | 0 | |
| 5月 | 上旬 | 24.7 | 11.7 | 17.6 | 6.0 | 2.2 | 61.0 | 0 | 0 |
| 中旬 | 29.1 | 12.7 | 18.1 | 7.6 | 2.0 | 61.8 | 0 | 0 | |
| 下旬 | 35.8 | 14.0 | 19.4 | 9.2 | 1.8 | 71.4 | 0 | 0 | |
| 6月 | 上旬 | 28.5 | 14.9 | 19.8 | 10.6 | 1.7 | 63.7 | 0 | 0 |
| 中旬 | 45.0 | 16.0 | 20.2 | 12.5 | 1.6 | 47.1 | 0 | 0 | |
| 下旬 | 47.9 | 17.3 | 21.5 | 13.7 | 1.6 | 50.0 | 0 | 0 | |
| 7月 | 上旬 | 51.6 | 18.8 | 22.8 | 15.6 | 1.4 | 42.7 | 0 | 0 |
| 中旬 | 56.8 | 19.7 | 23.6 | 16.7 | 1.4 | 39.5 | 0 | 0 | |
| 下旬 | 53.5 | 21.6 | 25.8 | 18.4 | 1.3 | 55.1 | 0 | 0 | |
| 8月 | 上旬 | 47.4 | 22.3 | 26.7 | 18.9 | 1.4 | 52.9 | 0 | 0 |
| 中旬 | 59.4 | 22.0 | 26.0 | 18.8 | 1.4 | 46.8 | 0 | 0 | |
| 下旬 | 71.1 | 21.4 | 25.7 | 17.8 | 1.4 | 50.1 | 0 | 0 | |
| 9月 | 上旬 | 47.8 | 20.8 | 25.1 | 17.0 | 1.4 | 46.8 | 0 | 0 |
| 中旬 | 80.3 | 19.0 | 23.7 | 14.7 | 1.4 | 45.8 | 0 | 0 | |
| 下旬 | 55.6 | 16.6 | 21.8 | 11.7 | 1.6 | 49.3 | 0 | 0 | |
| 10月 | 上旬 | 61.8 | 15.0 | 20.3 | 10.0 | 1.6 | 46.5 | 0 | 0 |
| 中旬 | 40.5 | 12.8 | 18.9 | 7.2 | 1.5 | 53.8 | 0 | 0 | |
| 下旬 | 32.8 | 10.9 | 16.7 | 5.2 | 1.7 | 53.7 | 0 | 0 | |
| 11月 | 上旬 | 18.7 | 9.0 | 15.3 | 3.1 | 1.8 | 55.3 | 0 | 0 |
| 中旬 | 18.8 | 6.7 | 12.6 | 1.2 | 1.9 | 46.4 | 0 | 0 | |
| 下旬 | 18.3 | 4.9 | 10.5 | -0.3 | 2.0 | 48.2 | 0 | 0 | |
| 12月 | 上旬 | 15.1 | 3.0 | 8.1 | -1.6 | 2.1 | 47.9 | 4 | 2 |
| 中旬 | 14.7 | 1.4 | 6.0 | -2.9 | 2.2 | 48.8 | 6 | 3 | |
| 下旬 | 24.0 | 0.8 | 5.2 | -3.4 | 2.3 | 54.3 | 13 | 6 | |