Ideal weather days in Cardiff
The best time to visit Cardiff for warm, dry weather is May to August, with 13 to 16 such days a month.
How many days here suit you?
Set your ideal day. Each day measured at Cardiff's weather station in 2023–2025 is checked against it.
They're most common in May to August.
This station doesn't record cloud cover, so the sky setting is left out here.
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Your ideal days in Cardiff, month by month
Why the other days don't count
- Too cold239
- Too wet148
- Too windy90
- Too hot0
A day can fail more than one test.
Warm and dry, beach and mild days
With the Warm & dry preset (a high of 18–33 °C, no more than 1 mm of rain, wind under 20 km/h), Cardiff averaged 76 days a year in 2023–2025. Every number here is counted from real measured days in the United Kingdom, not from climate averages.
Beach days (a high of 26–35 °C, almost no rain, mostly sunny) are most common in (up to 3 a month, 10 a year). Mild, still days (16–26 °C, light wind) are most common in May (up to 12 a month, 42 a year).
What spoils the other days
Most of the days that don't count are too cold (a high under 18 °C): 239 a year, mostly in October to April. Another 148 are wet (more than 1 mm of rain), mostly in July to March. A day can fail more than one test.
Cardiff weather, month by month
| Month | Typical high | Rain days | Windy days | Clear days | Warm & dry days |
|---|---|---|---|---|---|
| January | 9 °C 47 °F | 12 | 10 | 6 | 0 of 31 |
| February | 10 °C 50 °F | 14 | 8 | 5 | 0 of 28 |
| March | 12 °C 53 °F | 15 | 8 | 5 | 0 of 31 |
| April | 14 °C 56 °F | 11 | 7 | 8 | 2 of 30 |
| May | 18 °C 64 °F | 8 | 4 | 11 | 13 of 31 |
| June | 20 °C 68 °F | 8 | 6 | 9 | 16 of 30 |
| July | 20 °C 67 °F | 14 | 8 | 7 | 16 of 31 |
| August | 21 °C 70 °F | 11 | 7 | 6 | 15 of 31 |
| September | 19 °C 65 °F | 17 | 6 | 7 | 11 of 30 |
| October | 16 °C 60 °F | 19 | 3 | 6 | 3 of 31 |
| November | 12 °C 54 °F | 15 | 8 | 3 | 0 of 30 |
| December | 11 °C 52 °F | 17 | 15 | 0 | 0 of 31 |
| Year | 161 | 90 | 73 | 76 of 365 |
Typical high is the median daily maximum. A rain day has 1 mm or more; a windy day a mean wind above 20 km/h; a clear day a daytime cloud cover of 2/8 or less on average (9:00–17:00). Days are averaged over 2023–2025 and scaled to the length of each month.
Year by year
- 2023 74 warm, dry days
- 2024 69 warm, dry days
- 2025 incomplete (8 of 12 months)
Questions
When is the best time to visit Cardiff for good weather?
The best time to visit Cardiff for warm, dry weather is May to August, with 13 to 16 such days a month. Beach days (a high of 26–35 °C, almost no rain, mostly sunny) are most common in (up to 3 a month, 10 a year). Counted from measured days at St Athan station, 2023–2025.
Does it rain a lot in Cardiff?
On average 161 days a year had 1 mm of rain or more in 2023–2025. The wettest month was October (19 rain days), the driest June (8).
How many sunny days does Cardiff get a year?
About 73 days a year had mostly clear skies (daytime cloud cover of 2/8 or less on average, 9:00–17:00), most of them in May (11).
How warm does Cardiff get?
The median daily high ranged from 9 °C (47 °F) in January to 21 °C (70 °F) in August.
Nearby
- London210 km102 days
- Dublin290 km, Ireland67 days
- Cork370 km, Ireland37 days
- Belfast390 km61 days
- Nantes490 km, France134 days
- Edinburgh500 km61 days
Where is the best climate in the United Kingdom?
Open Cardiff on the map Set your own temperature, rain and wind limits.
Source: St Athan weather station (03716099999), 20 km from the centre of Cardiff, 50 m above sea level. Daily records from NOAA's Global Surface Summary of the Day, 2023–2025; 86% of days have a complete record. A single station may not represent every part of a city, and three years is a short record.