Your trips
Organise your trips easily with tabs
London
– Cardiff
Any date
+ Search
When is the best time to visit Cardiff?
In general the best time to visit Cardiff is probably July, when the weather is usually great. The hottest months are June, July, August, while the coldest months are January, February, December.
Depending on the activities you want to experience, you may choose different months to visit:
- In general, it’s pleasant to walk and do outdoor activities during June - September.
- If you want to avoid wet weather, then your choice is January, November, December with the lowest chance of rain.
Average weather in Cardiff in different months
This is the average weather in Cardiff for each month based on historic data:
In February, March, April, May, June, July, August, September, October, November, December the weather is average. Expect around 182 rainy days, and the precipitation amounts to approximately 119 mm in October.
January bring not the best weather. January is the coldest month with the temperature going down to +4°C.
Climate in Cardiff
Here is the detailed breakdown of the climate in Cardiff for each month:
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum Temperature | |||||||||||
| +14°C | +17°C | +20°C | +25°C | +27°C | +30°C | +34°C | +33°C | +29°C | +26°C | +17°C | +16°C |
| Average Maximum Temperature | |||||||||||
| +8°C | +8°C | +10°C | +13°C | +16°C | +19°C | +21°C | +20°C | +18°C | +15°C | +11°C | +9°C |
| Minimum Temperature | |||||||||||
| -9°C | -8°C | -6°C | -2°C | 0°C | +3°C | +6°C | +7°C | +4°C | -3°C | -7°C | -7°C |
| Avg. water temperature | |||||||||||
| +10°C | +10°C | +9°C | +11°C | +13°C | +15°C | +18°C | +18°C | +17°C | +16°C | +15°C | +13°C |
| Humidity, % | |||||||||||
| 85 | 82 | 80 | 76 | 76 | 77 | 77 | 78 | 79 | 82 | 84 | 85 |
| Rain, mm | |||||||||||
| 89 | 71 | 74 | 63 | 72 | 74 | 74 | 85 | 84 | 119 | 103 | 108 |
| Snow, mm | |||||||||||
| 5 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Average wind speed, m/s | |||||||||||
| 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 |
| Sunny Days | |||||||||||
| 2 | 2 | 3 | 5 | 5 | 4 | 5 | 3 | 3 | 2 | 2 | 2 |
| Cloud Days | |||||||||||
| 9 | 10 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 8 | 8 | 9 |
| Rainy Days | |||||||||||
| 18 | 14 | 16 | 15 | 15 | 15 | 16 | 17 | 17 | 20 | 19 | 18 |
| Snowy Days | |||||||||||
| 2 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Average Temperature
Here are the average maximum and minimum temperatures in Cardiff during the whole year:
The hottest month in Cardiff is July with average maximum temperature going up to +21°C. The coldest month is January with the lowest temperatures of +4°C.
Water temperature
Here are the water temperatures in Cardiff during the whole year:
Cardiff achieves its warmest water temperature in August, where the average sea temperature goes up to +17°C. Coldest water temperature is in March with +8°C in average.
Humidity
The temperature feels different depending on humidity. Here is how humidity in Cardiff looks throughout the year, in %:
The most humid month in Cardiff is December with average humidity going up to 85%. The least humid month is April with an average humidity of 76%.
Rain
Amount of rainfall in mm. in Cardiff during the whole year based on historical data:
The sunniest and driest month is April with approximately 5 sunny days and a total precipitation of around 63 mm. The rainiest and wettest month is October with approximately 20 rainy days and 119 mm of total precipitation.
Snow
Amount of snow in mm. in Cardiff during the whole year based on historical data:
The snowiest month is January with approximately 2 snowy days.
FAQ
Frequently asked questions about the weather in Cardiff:
What is the hottest month in Cardiff?
The hottest month in Cardiff is July with average maximum temperature of +21°C.
What is the coldest month in Cardiff?
The coldest month in Cardiff is January with minimum temperatures of +4°C.
Is Cardiff worth visiting in winter?
Winter in Cardiff could be a good time to visit, as the weather is generally ok.
When does it rain the least in Cardiff?
if you're looking to visit Cardiff when it rains the least, you should plan your trip for October, December, November. During this time, rainfall is rare with the driest month being April with only 63 mm of rain.
Other cities in United Kingdom
Check out the weather for other cities in United Kingdom.
Monthly weather in Cardiff
Source of the data
For this page, we’ve looked at the typical weather in Cardiff, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.