The ideal time to visit Cardiff Castle in Cardiff, United Kingdom, is during the spring months, particularly from March to May. This season offers a perfect blend of mild weather and the beauty of spring blossoms, with fewer tourists crowding the site compared to the summer months. The temperatures are pleasantly cool, typically ranging between 8°C to 15°C, making it comfortable for exploring the outdoor aspects of the castle grounds. Additionally, the spring brings less rainfall than the autumn, ensuring a lower chance of your visit being dampened by the unpredictable Welsh weather. Visiting during this time also means you'll be able to enjoy the castle's lush gardens in full bloom.
However, if you're looking to experience some of Cardiff's cultural events alongside your visit to the castle, the summer months of June to August can also be appealing. Despite being peak tourist season which leads to larger crowds, the summer offers the warmest weather conditions, with temperatures typically ranging from 15°C to 22°C. It is an excellent time for outdoor activities, picnics in the castle grounds, and attending numerous festivals that take place in the city. Be aware that accommodation and attraction prices can be higher during this peak season, so it's advisable to book in advance to secure the best deals.
| Month | Min Temp | Max Temp |
|---|---|---|
| January | 2 °c | 7 °c |
| February | 2 °c | 7 °c |
| March | 3 °c | 9 °c |
| April | 5 °c | 12 °c |
| May | 7 °c | 16 °c |
| June | 10 °c | 18 °c |
| July | 12 °c | 21 °c |
| August | 12 °c | 20 °c |
| September | 10 °c | 18 °c |
| October | 8 °c | 14 °c |
| November | 5 °c | 10 °c |
| December | 3 °c | 7 °c |
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