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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Culture Observer weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Blaenavon’s weather is cool and damp for most of the year, with mild summers and frequent rain. Based on the live forecast above, the next few days will stay unsettled. The best months for walking in the World Heritage Site are May, June and September, when the chance of settled spells is highest.
What is the weather like in Blaenavon right now?
Blaenavon sits at about 340 metres above sea level on the edge of the Brecon Beacons. That altitude means it is often a few degrees cooler than nearby towns such as Abergavenny. Rain can arrive quickly, even in summer. The live forecast above gives the most accurate picture for the next 24 hours, but if you’re checking the 10-day forecast for Blaenavon, expect cloud and showers at any time of year.
When should I visit Blaenavon and what should I pack?
Late spring and early autumn are the most reliable for outdoor visits. July and August are warmest – daytime highs normally reach 18–20°C – but can also bring heavy afternoon downpours. Winter (November–February) is cold and often foggy, with occasional blaenavon snow that can cut off minor roads. Pack a waterproof jacket and warm layers regardless of the season; sturdy footwear is essential for the Iron Mountain trail.
Is Blaenavon colder than Abergavenny?
Yes. Blaenavon is roughly 200 metres higher than Abergavenny weather stations record, so it can be 3–5°C cooler, especially on clear nights. Fog and frost are also more common in Blaenavon during winter mornings.
Where can I get the most reliable Blaenavon weather forecast?
The Met Office and BBC Weather both cover Blaenavon. The blaenavon weather met office page gives detailed mountain forecasts, while bbc weather blaenavon works well for quick checks. For the weather in blaenavon tomorrow, the live forecast above is your best bet.
Does it often snow in Blaenavon?
Blaenavon averages 10–15 days of lying snow per year, mostly between December and February. The higher slopes around the Big Pit can hold snow for several days after a fall, but it rarely causes prolonged disruption.
Sources
For more on Welsh weather patterns, see our UK weather hub or check conditions in nearby cities such as Bristol Weather and Sheffield Weather.