Cardiff climate guide

Get the latest coronavirus (COVID-19) updates for the UK with current travel advice, statistics and online resources.

Temperature in Cardiff (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Cardiff7
7°C maximum daytime temperature in February in Cardiff7
10°C maximum daytime temperature in March in Cardiff10
12°C maximum daytime temperature in April in Cardiff12
16°C maximum daytime temperature in May in Cardiff16
19°C maximum daytime temperature in June in Cardiff19
20°C maximum daytime temperature in July in Cardiff20
20°C maximum daytime temperature in August in Cardiff20
18°C maximum daytime temperature in September in Cardiff18
14°C maximum daytime temperature in October in Cardiff14
10°C maximum daytime temperature in November in Cardiff10
8°C maximum daytime temperature in December in Cardiff8
Min temperature (night-time)
2°C minimum night-time temperature in January in Cardiff2
2°C minimum night-time temperature in February in Cardiff2
3°C minimum night-time temperature in March in Cardiff3
4°C minimum night-time temperature in April in Cardiff4
7°C minimum night-time temperature in May in Cardiff7
10°C minimum night-time temperature in June in Cardiff10
12°C minimum night-time temperature in July in Cardiff12
12°C minimum night-time temperature in August in Cardiff12
10°C minimum night-time temperature in September in Cardiff10
8°C minimum night-time temperature in October in Cardiff8
5°C minimum night-time temperature in November in Cardiff5
3°C minimum night-time temperature in December in Cardiff3
Sea temperature
8°C sea temperature in January in Cardiff8
7°C sea temperature in February in Cardiff7
8°C sea temperature in March in Cardiff8
9°C sea temperature in April in Cardiff9
12°C sea temperature in May in Cardiff12
15°C sea temperature in June in Cardiff15
17°C sea temperature in July in Cardiff17
18°C sea temperature in August in Cardiff18
17°C sea temperature in September in Cardiff17
14°C sea temperature in October in Cardiff14
11°C sea temperature in November in Cardiff11
9°C sea temperature in December in Cardiff9

Sunshine & Daylight in Cardiff

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
8 hours of daylight per day in January in Cardiff8
10 hours of daylight per day in February in Cardiff10
12 hours of daylight per day in March in Cardiff12
14 hours of daylight per day in April in Cardiff14
16 hours of daylight per day in May in Cardiff16
17 hours of daylight per day in June in Cardiff17
16 hours of daylight per day in July in Cardiff16
15 hours of daylight per day in August in Cardiff15
13 hours of daylight per day in September in Cardiff13
11 hours of daylight per day in October in Cardiff11
9 hours of daylight per day in November in Cardiff9
8 hours of daylight per day in December in Cardiff8

Rainfall in Cardiff

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
20 days with some rainfall in January in Cardiff20
15 days with some rainfall in February in Cardiff15
17 days with some rainfall in March in Cardiff17
15 days with some rainfall in April in Cardiff15
15 days with some rainfall in May in Cardiff15
14 days with some rainfall in June in Cardiff14
13 days with some rainfall in July in Cardiff13
15 days with some rainfall in August in Cardiff15
15 days with some rainfall in September in Cardiff15
18 days with some rainfall in October in Cardiff18
18 days with some rainfall in November in Cardiff18
19 days with some rainfall in December in Cardiff19
Average monthly rainfall (mm)
104 mm monthly rainfall in January in Cardiff104
76 mm monthly rainfall in February in Cardiff76
79 mm monthly rainfall in March in Cardiff79
60 mm monthly rainfall in April in Cardiff60
65 mm monthly rainfall in May in Cardiff65
65 mm monthly rainfall in June in Cardiff65
66 mm monthly rainfall in July in Cardiff66
81 mm monthly rainfall in August in Cardiff81
91 mm monthly rainfall in September in Cardiff91
101 mm monthly rainfall in October in Cardiff101
105 mm monthly rainfall in November in Cardiff105
109 mm monthly rainfall in December in Cardiff109

More climate for Cardiff

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Cardiff1
UV (maximum) index 1 (Low) in February in Cardiff1
UV (maximum) index 3 (Moderate) in March in Cardiff3
UV (maximum) index 4 (Moderate) in April in Cardiff4
UV (maximum) index 5 (Moderate) in May in Cardiff5
UV (maximum) index 6 (High) in June in Cardiff6
UV (maximum) index 6 (High) in July in Cardiff6
UV (maximum) index 6 (High) in August in Cardiff6
UV (maximum) index 4 (Moderate) in September in Cardiff4
UV (maximum) index 2 (Low) in October in Cardiff2
UV (maximum) index 1 (Low) in November in Cardiff1
No UV (maximum) index in December in Cardiff0
Heat & Humidity
No heat & humidity in January in Cardiff0
No heat & humidity in February in Cardiff0
No heat & humidity in March in Cardiff0
No heat & humidity in April in Cardiff0
No heat & humidity in May in Cardiff0
No heat & humidity in June in Cardiff0
No heat & humidity in July in Cardiff0
No heat & humidity in August in Cardiff0
No heat & humidity in September in Cardiff0
No heat & humidity in October in Cardiff0
No heat & humidity in November in Cardiff0
No heat & humidity in December in Cardiff0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

  • Top deals & discounts
  • Cardiff weather overview
  • More destinations
  • Best time to go to Cardiff
  • Cardiff 5-day weather forecast
  • Cardiff weather today - current conditions (last 24-hours)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The climate guide for Cardiff, Wales shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

  • Find holiday cottages in the UK & across Europe
  • Search by destination, dates, duration & party size
  • Filter cottages by customer ratings, facilities & more

Cardiff holiday rentals

Find holiday rentals in Cardiff, Wales including holiday homes, self-catering accommodation, B&Bs, shared space, home swaps and short-term lets.

  • Airbnb
  • HomeAway

Cardiff hotels

Compare prices for hotels in Cardiff, Wales by booking directly with hotel chains and independent hotels or via online travel agencies and hotel comparison websites.

  • IHG

Cardiff camping & hostels

Looking for camping holidays in Cardiff, Wales? Browse hostels and campsites for camping, glamping, yurts, cabins, tree houses, youth hostels and caravan parks.

  • Campsited
  • Hostel World
  • YHA

Show all products

Back to search

UK & Ireland holidays

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Where's hot in Wales?

Below are average maximum temperatures at popular destinations in Wales for next month - July. Select a destination to see the climate guide for all months of the year.

More destinations & map >>

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.