Frequent average weather in Hainan all through March is 23. Through the month the highs are about 28 with lows of 21 degrees. With the details being further below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 23 |
| High Temperature | 28 |
| Low Temperature | 21 |
Useful Links: Hainan Weather: Average Weather & Yearly Climate