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The best time to visit Cardiff
May, June, July, August and September — daytime highs around 19°C. Every number on this page is measured, not guessed.
Cardiff month by month
| Month | Day | Night | Wet days | |
|---|---|---|---|---|
| January | 8°C | 2°C | 14 | |
| February | 9°C | 3°C | 15 | |
| March | 10°C | 4°C | 16 | |
| April | 13°C | 5°C | 11 | Shoulder |
| May | 17°C | 9°C | 12 | Best |
| June | 19°C | 12°C | 13 | Best |
| July | 21°C | 13°C | 15 | Best |
| August | 20°C | 13°C | 14 | Best |
| September | 18°C | 11°C | 14 | Best |
| October | 15°C | 9°C | 16 | Shoulder |
| November | 11°C | 6°C | 15 | |
| December | 9°C | 5°C | 18 |
The short version
Warmest: July, around 21°C by day. Coolest: January, around 8°C by day and 2°C at night. Wettest: December with about 18 wet days. Driest: April with about 11.
If you want fewer people: April, October sit right beside the best months. The weather is close and the crowds are not.
Book it for those months
Prices climb as the good months fill up.
Common questions
When is the best time to visit Cardiff?
The best months are May, June, July, August and September, when daytime highs sit around 19°C.
What is the hottest month in Cardiff?
July, with daytime highs around 21°C.
What is the wettest month in Cardiff?
December, with about 18 wet days. The driest is April with about 11.
When is the cheapest time to visit Cardiff?
Prices follow the weather. The months either side of the best ones — April, October — are usually cheaper with similar conditions.
Temperatures and wet days are measured, not estimated: ERA5 reanalysis for 2021-2023, at Cardiff, Wales. Source: Open-Meteo. Hotel and activity links are partner links — the price you pay is the same.