| Climate data for Izu Ōshima (1991−2020 normals, extremes 1938−present) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 20.9 (69.6) |
21.0 (69.8) |
22.2 (72.0) |
25.5 (77.9) |
28.4 (83.1) |
32.3 (90.1) |
34.3 (93.7) |
35.9 (96.6) |
33.7 (92.7) |
29.7 (85.5) |
24.8 (76.6) |
23.1 (73.6) |
35.9 (96.6) |
| Mean daily maximum °C (°F) | 11.0 (51.8) |
11.6 (52.9) |
14.2 (57.6) |
18.2 (64.8) |
21.9 (71.4) |
24.3 (75.7) |
27.8 (82.0) |
29.5 (85.1) |
26.7 (80.1) |
22.0 (71.6) |
17.8 (64.0) |
13.4 (56.1) |
19.9 (67.8) |
| Daily mean °C (°F) | 7.5 (45.5) |
7.8 (46.0) |
10.4 (50.7) |
14.4 (57.9) |
18.2 (64.8) |
21.0 (69.8) |
24.6 (76.3) |
26.0 (78.8) |
23.4 (74.1) |
18.9 (66.0) |
14.5 (58.1) |
10.0 (50.0) |
16.4 (61.5) |
| Mean daily minimum °C (°F) | 3.9 (39.0) |
4.0 (39.2) |
6.6 (43.9) |
10.7 (51.3) |
14.8 (58.6) |
18.4 (65.1) |
22.2 (72.0) |
23.5 (74.3) |
20.8 (69.4) |
16.1 (61.0) |
11.3 (52.3) |
6.5 (43.7) |
13.2 (55.8) |
| Record low °C (°F) | −3.3 (26.1) |
−4.0 (24.8) |
−1.9 (28.6) |
0.1 (32.2) |
6.4 (43.5) |
10.4 (50.7) |
12.4 (54.3) |
16.0 (60.8) |
12.4 (54.3) |
7.2 (45.0) |
3.0 (37.4) |
−3.0 (26.6) |
−4.0 (24.8) |
| Average precipitation mm (inches) | 137.3 (5.41) |
146.0 (5.75) |
238.4 (9.39) |
247.4 (9.74) |
256.5 (10.10) |
328.8 (12.94) |
255.9 (10.07) |
191.7 (7.55) |
341.3 (13.44) |
405.2 (15.95) |
192.8 (7.59) |
117.6 (4.63) |
2,858.9 (112.56) |
| Average snowfall cm (inches) | trace | 1 (0.4) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
2 (0.8) |
| Average precipitation days (≥ 1.0 mm) | 7.1 | 7.7 | 11.5 | 10.6 | 10.6 | 12.6 | 10.3 | 8.4 | 12.0 | 12.0 | 9.6 | 7.6 | 120 |
| Average snowy days | 0.2 | 0.3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.5 |
| Average relative humidity (%) | 64 | 66 | 70 | 74 | 79 | 85 | 87 | 86 | 83 | 79 | 74 | 68 | 76 |
| Mean monthly sunshine hours | 153.7 | 145.4 | 158.1 | 174.2 | 179.7 | 125.1 | 150.8 | 190.1 | 141.0 | 131.4 | 140.3 | 147.6 | 1,837.2 |
| Source: JMA[1][2] | |||||||||||||
References
- ^ 観測史上1～10位の値（年間を通じての値）. JMA. Retrieved February 23, 2022.
- ^ 気象庁 / 平年値（年・月ごとの値）. JMA. Retrieved February 23, 2022.