Cardiff Climate and Average Weather
Climate of Cardiff: average temperatures, rainfall and seasons month by month.
Climate in Cardiff month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 46° | 36° | 5,5 in | ★★☆☆☆ |
| February | 49° | 41° | 6,2 in | ★★☆☆☆ |
| March | 54° | 40° | 3,5 in | ★★★☆☆ |
| April | 58° | 44° | 4,0 in | ★★★☆☆ |
| May | 65° | 50° | 3,8 in | ★★★★☆ |
| June | 68° | 54° | 3,6 in | ★★★★☆ |
| July | 73° | 57° | 2,3 in | ★★★★☆ |
| August | 70° | 56° | 2,2 in | ★★★★☆ |
| September | 65° | 53° | 5,9 in | ★★★☆☆ |
| October | 59° | 49° | 5,9 in | ★★★☆☆ |
| November | 52° | 43° | 5,2 in | ★★★☆☆ |
| December | 50° | 42° | 6,8 in | ★★☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Recent extremes in Cardiff
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Cardiff compares with nearby places
Annual averages, and the difference against Cardiff.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Bristol | 26 mi | 53°F | about the same | 42 in |
| Somerset | 28 mi | 54°F | +33°F warmer | 37 in |
| Bath | 36 mi | 52°F | 33°F cooler | 39 in |
| Devon | 55 mi | 53°F | about the same | 44 in |
| Stonehenge | 62 mi | 52°F | about the same | 37 in |
Best time to visit Cardiff
Go in June, July and August. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Cardiff
Today is warmer than average for August. The forecast high of 78°F is 7.9°F above the 70°F typical for this month.
A 67% chance means rain is expected over most of the area. Plan indoor alternatives.
Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 57°F.
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 6 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Cardiff is a city in South Wales. Cardiff is known for the castle and Millennium Centre. It has a population of about 375.000.
Right now it is 66°F (19°C) in Cardiff with overcast. It feels like 67°F. Today runs from 65°F to 78°F. Chance of precipitation is 67%. Sightseeing conditions score 8.1/10 - good conditions.
The best time to visit Cardiff is June, July and August. The climate is temperate. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 73°F, while January is the coldest with lows near 36°F.
The closest major airport is London Heathrow Airport (LHR), about 117 mi away. Nearby highlights include Stonehenge, Avebury and Associated Sites, Stonehenge, Snowdonia National Park and River Thames.
In plain terms. Today is warmer than average for August. The forecast high of 78°F is 7.9°F above the 70°F typical for this month. The best window to be outside is roughly 12 PM to 3 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Cardiff today at 9.5/10. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Cardiff
| Type | City |
|---|---|
| County | South Wales |
| Country | United Kingdom |
| Continent | Europe |
| Coordinates | 51°28′53.8″N 3°10′44.8″W (51.4816, -3.1791) |
| Population | 375.000 |
| Known for | the castle and Millennium Centre |
| Local time | 9:19 AM (UTC+01:00) |
| Best months | June, July and August |
| Climate | Temperate |
Weather map for Cardiff
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Cardiff
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Cardiff?
Cardiff is a city in South Wales. Its coordinates are 51.4816, -3.1791. It lies in Europe.
What is the weather like in Cardiff right now?
It is currently 66°F (19°C) with overcast. Humidity is 80% and wind is 5 mph.
When is the best time to visit Cardiff?
June, July and August offer the most comfortable conditions in Cardiff, which has a temperate climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Cardiff in?
Cardiff observes Europe/London (UTC+01:00). The local time is 9:19 AM.
How many people live in Cardiff?
Cardiff has a population of approximately 375.000.
What is the nearest airport to Cardiff?
The closest airports are London Heathrow Airport (LHR), 117 mi away, London Gatwick Airport (LGW), 131 mi away and Dublin Airport (DUB), 187 mi away.
What are the top things to do in Cardiff?
Popular options include Stonehenge, Avebury and Associated Sites, Stonehenge, Snowdonia National Park, River Thames, British Museum and Big Ben and the Houses of Parliament.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-supported) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 26, 2026 at 9:19 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
