Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Swansea as you normally would.
In terms of precipitation, rainfall in Swansea ranges from 48.0 - 104.0 inches per month. October is typically the wettest month, when rainfall can reach 104.0 mm. June is typically the driest time to visit Swansea when rainfall is around 48.0 mm.
If weather is an important factor for your trip to Swansea, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 6.0 C).
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