Weather in Cardiff in January 2025
- January is usually the coldest month of the year in Cardiff;
Average weather
Average temperature in Cardiff in January
Going from a maximum of +13°C during the day to a minimum of -2°C during the night, the temperature in January averages around +9°C.
The average maximum temperature goes down 7% by the end of the month, compared with the beginning of the month, from +11°C to +10°C.
Is Cardiff warm or cold in January?
Cardiff is typically cool in January.
Maximum temperatures go down compared to the previous month from +9°C to +8°C. The minimum temperature also goes up from +4°C to +4°C.
Pack a sweater and a jacket as there will be cooler temperatures.
January is the coldest month in Cardiff, here is the comparison with other months:
Water temperature in Cardiff in January
Water in Cardiff in January is Cold. It varies from +7°C to +10°C, with an average of +9°C. Note that the air temperature is lower than the water temperature, averaging around +8°C.
The water temperature in January is one of the coldest of the entire year:
Can you swim in Cardiff in January?
Climate in Cardiff in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +9°C | +8°C | +8°C | ||||
| Min. temperature | ||||||
| -7°C | -9°C | -8°C | ||||
| Max. temperature | ||||||
| +16°C | +14°C | +17°C | ||||
| Rainfall | ||||||
| 108 mm | 89 mm | 71 mm | ||||
| Wind | ||||||
| 5 m/s | 5 m/s | 5 m/s | ||||
| Avg. water temperature | ||||||
| +11°C | +9°C | +9°C | ||||
| Humidity | ||||||
| 85% | 85% | 82% | ||||
| Air pressure | ||||||
| 1013 HPa | 1014 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 2 | ||||
| Cloudy days | ||||||
| 9 | 9 | 10 | ||||
| Rainy days | ||||||
| 18 | 18 | 14 | ||||
| Snowy days | ||||||
| 1 | 2 | 2 | ||||
January typically has worse weather conditions compared to December. It’s getting colder in January. From +9°C in the day, the average maximum temperature lowers to +8°C. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 108 mm to 89 mm. Humidity levels don’t change as the month goes on, averaging around 85%. The average wind speed doesn’t change much during January, staying around 5 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
But maybe it is worth considering traveling in February as the weather gets better.
Wind
The average wind speed is 5 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Cardiff is gradually increasing during January, going from 6 m/s to 6 m/s over the course of the month.
Rain
Snow
January is one of the snowiest months in Cardiff.
Here’s how January is compared with other months in the amount of snow, total mm:
How was the weather last January in Cardiff?
Climate Change over Years
The climate in Cardiff in January has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+12°C) and the highest in 2022 (+16°C). The driest year was 2010 with only 736 mm of rainfall, and the wettest year was 2022 with 1906 mm.
FAQ
Is January a good time to visit Cardiff?
Can you sunbathe in Cardiff in January?
Can you swim in Cardiff in January?
Is Cardiff rainy in January?
Is it sunny in Cardiff in January?
Other cities in United Kingdom
Monthly weather in Cardiff
Source of the data
For this page, we’ve looked at the typical weather in Cardiff, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.