Swansea in January
If January is your window for visiting Swansea, here's what the climate data says you can expect.
Daytime highs average 22.7 degrees, dropping to 13.3 degrees overnight. That's a 9-degree swing between day and night. Comfortable during the day, with evenings that invite a light layer.
At 22.7 degrees, January runs 4.5 degrees above Swansea's annual average of 18.2 degrees.
The rain data says 62mm over 10 days. A decent amount, but not relentless.
Sunshine-wise, January delivers around 21.6 MJ/m2 of daily solar radiation. UV sits in the extreme category. Sunscreen, hat, and sunnies are all essential. You can burn in under 10 minutes.
January earns a 9.5/10 on our Comfort Score. This is prime time.
Packing tip: bring a mix of short and long sleeves, waterproof gear, and serious sun protection.
Scroll down for the detailed climate data, or explore what nearby cities are like in January.
January at a Glance
Temperature Range
Daily temperature range in January. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- Comfortable casual wear suitable for warm days
- A waterproof jacket or compact umbrella
- High SPF sunscreen (50+), sunglasses, and UV-protective clothing
Coming From Overseas?
How January in Swansea stacks up against major cities around the world.
About 15 degrees warmer and considerably wetter.
About 19 degrees warmer and considerably drier.
About 13 degrees warmer and considerably wetter.
How January Compares
Swansea's monthly climate at a glance. January is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 22.7 | 13.3 | 62mm | 9.5 |
| Feb | 24.6 | 13.0 | 22mm | 10.0 |
| Mar | 22.6 | 11.9 | 24mm | 9.4 |
| Apr | 18.2 | 8.8 | 67mm | 5.6 |
| May | 15.1 | 7.6 | 59mm | 2.7 |
| Jun | 12.3 | 6.5 | 40mm | 1.0 |
| Jul | 12.3 | 5.3 | 92mm | 1.0 |
| Aug | 15.1 | 7.6 | 64mm | 2.9 |
| Sep | 15.8 | 7.2 | 46mm | 4.1 |
| Oct | 17.9 | 8.0 | 54mm | 6.0 |
| Nov | 19.8 | 10.6 | 77mm | 7.3 |
| Dec | 21.9 | 12.5 | 95mm | 8.8 |