15-Day Weather Forecast - Cardiff
15-day weather forecast for Cardiff: temperatures from 5°C (41°F) to 21°C (70°F). Average daily high 17°C (63°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
Cardiff's 15-day outlook ranges from a low of 5°C to a high of 21°C, with an average daytime high near 17°C. That's 1° below the long-term average high of 18°C for this time of year. Air quality is currently good (AQI 24), with no notable outdoor health concerns.
Today vs Normal
The long-term average high for today is 18°C.
23 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running above normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.
Extended Outlook for Cardiff
Over the next 15 days, Cardiff is forecast to see temperatures ranging from 4°C to 21°C, averaging a daily high of 17°C. The extended outlook indicates frequent showers on 9 out of 15 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.