Castle Rock in December
4.9out of 10
Not the best time
Cold: highs around 4°C. Some rain: about 4 rainy days.
4°CAvg high
-10°CAvg low
4Rainy days (17 mm)
9:14 hDaylight
07:18Sunrise · 16:33 Sunset
Why this score
- Cold: highs around 4°C
- Some rain: about 4 rainy days
- Nights fall to about -10°C
What to wear and pack
- Winter coat, hat and scarf
- Gloves for freezing mornings
How reliable is the forecast?
Rainfall in December is fairly consistent from year to year (1.8 days). 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 | 5°C | -10°C | 16 mm | 4 | – | – | 5.0 |
| February | 6°C | -9°C | 18 mm | 5 | – | – | 5.1 |
| March | 11°C | -5°C | 44 mm | 7 | – | – | 5.8 |
| April | 14°C | -2°C | 66 mm | 9 | – | – | 6.2 |
| May | 19°C | 4°C | 77 mm | 13 | – | – | 6.9 |
| June | 25°C | 9°C | 54 mm | 11 | – | – | 7.7 |
| July | 28°C | 12°C | 63 mm | 11 | – | – | 7.6 |
| August | 27°C | 11°C | 51 mm | 11 | – | – | 7.6 |
| September | 23°C | 7°C | 33 mm | 6 | – | – | 8.2 |
| October | 17°C | 1°C | 35 mm | 6 | – | – | 7.4 |
| November | 9°C | -5°C | 25 mm | 5 | – | – | 5.9 |
| December | 4°C | -10°C | 17 mm | 4 | – | – | 4.9 |
Frequently asked questions
How hot is Castle Rock in December?
Daytime highs average 4°C and nights about -10°C.
When is the best time to visit Castle Rock?
The best months are September, June, July, August.