January · United Kingdom
Best time to visit Cardiff in January Weather, crowds & prices
Weather in Cardiff in January
Average temperature 5°C, 74 mm of rain, about 0 days with 6+ hours of sunshine and 93% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
January score
4.2/10
Ranked #10 of 12 months
- Avg temp
- 5°C
- Rainfall
- 74 mm
- Humidity
- 93%
- Days with 6h+ sun
- 0
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $$ · Moderate Cost ($$)
January in Cardiff scores 4.2/10 for sightseeing and cultural travel - ranked #10 of 12. Expect around 5°C, 74 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Cardiff mixes a Victorian arcades core, Cardiff Castle, and bay regeneration with easy access to Welsh coast and valleys. Best window: late spring through early autumn.
January in Cardiff — the hardest end of the year
January averages 5°C (41°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 74 mm, so plan one flexible day in three; you still get almost no days with 6+ hours of sunshine and 8.1 hours of daylight.
It scores 4.2/10 here, 10th of 12 months, against 9/10 in the destination's best month.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
Figure on mid-season pricing, with crowds are light for this destination.
Flexible dates? June scores 4.8 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Cardiff in January?
- In January, Cardiff averages 5°C, 74 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 4.2/10.
- Is January a good time to visit Cardiff?
- January earns a 4.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Cardiff in January?
- Expect about 74 mm of rain in January. Average humidity is 93% and there are about 0 days with 6+ hours of sunshine.
Curated in Cardiff
Tickets & experiences
Things to do in Cardiff
Cardiff, United Kingdom. Live activities and tours from GetYourGuide, matched to this destination.