Cardiff is set for a day of mixed weather, with a significant chance of rain and cooler temperatures. Residents can expect a damp start to the day, with conditions gradually improving as the day progresses.
Source: Data referenced in this article is taken from https://www.metoffice.gov.uk
The 80% chance of precipitation means that damp conditions are almost certain, and it would be prudent to prepare for wet weather. The high humidity of 98% will also contribute to a feeling of dampness, even when it is not actively raining. Earlier reporting noted: Belfast weather forecast: Sunny intervals with high chance of rain today, cooler week ahead Belfast, September 12, 2026 – Residents of Belfast can expect a day of mixed weather, with sunny intervals interspersed with a high probability of rain. Earlier reporting noted: Belfast Weather Today Earlier reporting noted: Today, September 12, 2026, Belfast will experience a day characterized by sunny intervals. The maximum temperature is forecast to reach 20°C, while the minimum temperature will be around 12°C, with an average temperature of 16.0°C. There is a high likelihood of rain, with a 95% chance of precipitation. The wind is expected to be brisk, with a maximum speed of 51.5 kph. Humidity levels will be high, reaching 93%.
Given the high likelihood of rain throughout the day, it is advisable for residents to carry umbrellas and wear waterproof footwear. The day will begin with a moderate temperature, but conditions are set to become cooler as the week progresses.
Today, September 13, 2026, Cardiff will experience a day marked by a high probability of rain. The forecast indicates a daily chance of rain at 80%, with the condition text describing it as “Light rain. The maximum temperature is expected to reach 20°C, while the minimum temperature will be around 18°C, leading to an average temperature of 19.0°C. Humidity levels are notably high, recorded at 98%, suggesting a muggy atmosphere. The maximum wind speed is predicted to be 33.8 kph. Tomorrow, September 14, will see overcast conditions with temperatures reaching up to 22°C and a low of 16°C. The latter half of the week shows a trend towards more settled weather, with sunny intervals predicted from September 15 onwards. Temperatures will gradually decrease, with a low of 12°C expected on September 15, and then hover around the mid-teens for the remainder of the week. Light showers are possible on September 17, but overall, the latter part of the week appears to offer more pleasant conditions compared to the start.
Looking ahead, the weather in Cardiff is expected to remain variable.