Temperature
Cold by day, cold at night.
Blaenavon is usually most comfortable in July and August. Typical daytime highs range from 42–66°F across the year. Most months see little rain.

Cold by day, cold at night.
Several rainy days. About 13 wet days, the highest monthly average.
Sunshine is limited, with cloud often dominating.
Humidity is rarely noticeable in the cool air.
In November, afternoons feel about 39° and nights feel near 34°.
Mostly cloudy skies this month.
Calm winds are typical in November.
November late afternoons are around 46°F, easing to about 43°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 42 | 34 | 3.1 | 13 | 3.9 | 88 |
| Feb | 43 | 34 | 2.5 | 11 | 5.3 | 85 |
| Mar | 47 | 36 | 2.5 | 11 | 6.9 | 82 |
| Apr | 52 | 38 | 2.7 | 12 | 9.2 | 78 |
| May | 58 | 44 | 3.0 | 13 | 10.4 | 78 |
| Jun | 62 | 49 | 2.7 | 11 | 10.9 | 78 |
| Jul | 66 | 52 | 2.6 | 12 | 10.8 | 78 |
| Aug | 65 | 52 | 2.9 | 11 | 9.7 | 80 |
| Sep | 61 | 48 | 2.5 | 10 | 7.9 | 83 |
| Oct | 54 | 44 | 3.5 | 13 | 5.9 | 86 |
| Nov | 48 | 38 | 3.3 | 13 | 4.4 | 88 |
| Dec | 43 | 35 | 3.4 | 13 | 3.8 | 89 |
Similar climates
Want a side-by-side climate view? Compare Blaenavon with Amsterdam.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology