Cardiff in July
In July, Cardiff averages 21°C (69°F) during the day and 14°C (56°F) at night, with frequent rain — about 14 days of the month see precipitation (80 mm total).
Peak seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
July offers comfortable temperatures in Cardiff, with some rain to plan around.
How July compares to the rest of the year in Cardiff
July is one of the warmest months in Cardiff (1st of 12) and moderately rainy compared to the rest of the year (8th of 12). Daytime temperature runs 6°C above the annual average (14°C). July runs 1°C warmer than June (19°C) and cools 1°C in August (20°C).
July sunrise & sunset in Cardiff
Times shown for Cardiff local time (Europe/London), calculated for the 15th of July. They shift by a few minutes day to day across the month.
Photography light in Cardiff — July
Golden-hour and blue-hour windows for the 15th of July, in Cardiff's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Cardiff in July
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on July's tier (Peak season) and Cardiff's popularity.
Crowds & pricing — July in Cardiff
Cardiff is in peak season during this month — expect bigger crowds at famous sights, higher hotel and flight prices, and longer queues. Restaurant reservations a few days out are advisable, and any boutique hotels you have your eye on should be booked weeks ahead. The trade-off: most attractions, restaurants, and seasonal services are fully open, the weather is at its most reliable, and the city feels at its most alive.
Why this tier: excellent tourism weather Northern Hemisphere summer holidays
Sun & mosquito risk — July in Cardiff
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Cardiff in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 8°C / 47°F | 3°C / 38°F | 111 mm | 17 | — |
| February | 9°C / 48°F | 3°C / 38°F | 102 mm | 14 | — |
| March | 10°C / 51°F | 4°C / 40°F | 97 mm | 16 | — |
| April | 13°C / 56°F | 5°C / 42°F | 61 mm | 10 | — |
| May | 16°C / 61°F | 9°C / 48°F | 82 mm | 12 | — |
| June | 19°C / 67°F | 12°C / 54°F | 67 mm | 13 | — |
| July | 21°C / 69°F | 14°C / 56°F | 80 mm | 14 | — |
| August | 20°C / 68°F | 13°C / 56°F | 105 mm | 15 | — |
| September | 18°C / 65°F | 12°C / 53°F | 87 mm | 12 | — |
| October | 15°C / 59°F | 10°C / 49°F | 134 mm | 15 | — |
| November | 11°C / 52°F | 6°C / 43°F | 114 mm | 16 | — |
| December | 9°C / 49°F | 5°C / 41°F | 139 mm | 18 | — |
Other cities with similar July weather
🌍 See the full ranked list of climate twins for Cardiff in July →
Frequently asked questions
How hot is Cardiff in July?
In July, Cardiff averages a high of 21°C (69°F) and a low of 14°C (56°F) — generally mild and pleasant.
Does it rain a lot in Cardiff in July?
July can be fairly wet in Cardiff, with about 14 rainy days on average.
Is July a good time to visit Cardiff?
July is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Cardiff in July?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full July packing list for Cardiff for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.