Dumbarton in December
4.0out of 10
Not the best time
Cold: highs around 6°C. Very wet: about 17 rainy days.
6°CAvg high
2°CAvg low
17Rainy days (142 mm)
6:43 hDaylight
08:53Sunrise · 15:36 Sunset
Why this score
- Cold: highs around 6°C
- Very wet: about 17 rainy days
- Rain varies a lot between years (±5.7 days)
What to wear and pack
- A warm jacket
- Rain jacket or compact umbrella
- Gloves for freezing mornings
How reliable is the forecast?
Rain in December varies a lot between years (±5.7 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 6°C | 2°C | 148 mm | 18 | – | – | 3.8 |
| February | 7°C | 2°C | 121 mm | 16 | – | – | 4.3 |
| March | 8°C | 3°C | 106 mm | 16 | – | – | 4.7 |
| April | 11°C | 4°C | 84 mm | 14 | – | – | 5.3 |
| May | 14°C | 6°C | 86 mm | 15 | – | – | 5.8 |
| June | 16°C | 9°C | 90 mm | 15 | – | – | 6.1 |
| July | 18°C | 11°C | 102 mm | 16 | – | – | 6.1 |
| August | 17°C | 11°C | 113 mm | 17 | – | – | 5.9 |
| September | 15°C | 9°C | 101 mm | 14 | – | – | 6.0 |
| October | 12°C | 7°C | 142 mm | 16 | – | – | 5.0 |
| November | 9°C | 4°C | 132 mm | 17 | – | – | 4.5 |
| December | 6°C | 2°C | 142 mm | 17 | – | – | 4.0 |
Frequently asked questions
How hot is Dumbarton in December?
Daytime highs average 6°C and nights about 2°C.
When is the best time to visit Dumbarton?
The best months are June, July, September, August.