The best time to visit Phetchaburi is from November to February. The months of April to June are extremely hot in this region, and July to October experiences heavy rainfall.
| Month | High/Low (°C) | Rain |
|---|---|---|
| January | 33°/ 19° | 0 days |
| February | 33°/ 19° | 0 days |
| March | 36°/ 21° | 2 days |
| April | 35°/ 22° | 10 days |
| May | 34°/ 24° | 20 days |
| June | 32°/ 24° | 16 days |
| July | 31°/ 23° | 8 days |
| August | 29°/ 23° | 14 days |
| September | 29°/ 22° | 19 days |
| October | 31°/ 22° | 23 days |
| November | 31°/ 21° | 5 days |
| December | 30°/ 18° | 0 days |