Sunniest places to go from Cardiff in July
The sunniest place you can reach from Cardiff in July within 15 hours is Nice at 14.3 h, costing 293 kg CO₂e return. The lowest-carbon option is Coventry at 12.4 kg — 24× less carbon for 3.9 h less.
Every destination here is on the efficiency frontier: nowhere else in Europe is both sunnier in July and lower in carbon. Anything a better option beats outright has been left out.
By rail or ferry By air
What the 15-hour limit costs: at this budget Nice can only be reached by air — 293 kg CO₂e, in 5h 6m. Allow up to 24 hours and the train does the same journey for 47.3 kg in 19h — 6× less carbon for 13h 54m more travelling.
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Coventry, United Kingdom | Rail | 12.4 kg | 16.0 °C | 10.4 h | 3.6 mm | 4h 6m |
| Portsmouth, United Kingdom | Rail | 13.2 kg | 17.2 °C | 10.9 h | 3.0 mm | 4h 12m |
| Boulogne-sur-Mer, France | Rail | 21.4 kg | 17.6 °C | 11.4 h | 3.2 mm | 6h 54m |
| Dijon, France | Rail | 34.6 kg | 19.9 °C | 12.0 h | 2.2 mm | 13h 6m |
| La Rochelle, France | Rail | 34.7 kg | 19.8 °C | 12.5 h | 1.4 mm | 13h 6m |
| Villefranche-sur-Saône, France | Rail | 37.9 kg | 21.8 °C | 13.1 h | 2.4 mm | 14h 36m |
| Romans-sur-Isère, France | Air | 236 kg | 23.5 °C | 13.7 h | 1.6 mm | 4h 48m |
| Nice, France | Air | 293 kg | 25.2 °C | 14.3 h | 0.3 mm | 5h 6m |
Warm is not the same as pleasant, which is why sunshine and rainfall are shown alongside temperature. All three are ERA5 monthly means for 2023–2024.
Where the curve breaks
The frontier is gentle until it isn't. Going from Villefranche-sur-Saône (37.9 kg, 13.1 h) to Romans-sur-Isère (236 kg, 13.7 h) buys 0.6 hours more sunshine for an extra 198 kg — 331 kg of CO₂e per hour. That single step is the most expensive sunshine on the whole curve.
The pick of them
If you'd rather have heat than sunshine
July answers differently depending on what you're after. The warmest destinations from Cardiff in July are a different list — hours of sunshine and degrees of warmth come apart, especially early and late in the year.
Where to stay in Nice
Places to stay in Nice, France, on a live map. Prices and availability come from Stay22 and its booking partners.
Affiliate disclosure. A booking made through this map may earn 0xCarbon a commission, at no extra cost to you. It changes nothing above it: the emissions figures come from UK Government conversion factors and are computed before anyone is paid anything.See the method.
Other months from Cardiff
July from elsewhere
- Amsterdam
- Barcelona
- Berlin
- Birmingham
- Bristol
- Brussels
- Cardiff
- Copenhagen
- Dublin
- Edinburgh
- Frankfurt
- Glasgow
- Leeds
- Lisbon
- Liverpool
- London
- Madrid
- Manchester
- Milan
- Munich
- Newcastle
- Nottingham
- Oslo
- Paris
- Prague
- Rome
- Sheffield
- Southampton
- Stockholm
- Vienna
- Warsaw
- Zurich
Questions
Where is the sunniest place to go from Cardiff in July?
Nice, France, at 14.3 h. Reaching it emits 293 kg CO₂e return, travelling 5h 6m each way by air.
Can I get somewhere sunny from Cardiff in July without flying?
Yes. Villefranche-sur-Saône reaches 13.1 h and is reachable by rail or ferry in 14h 36m, emitting 37.9 kg CO₂e return — though Nice is sunnier still, if you fly.
How much carbon does a return trip from Cardiff to Nice produce?
293 kg CO₂e for one person, return, by air. That uses the UK Government's 2026 conversion factors, including radiative forcing for flights.
Carbon uses UK Government (DESNZ/DEFRA) 2026 conversion factors applied to great-circle distance, with radiative forcing included for flights. Rail journey times are modelled estimates, not timetabled services. Full method · download the data.