Grenchen in December
4.0out of 10
Not the best time
Cold: highs around 4°C. Frequent rain: about 14 rainy days.
4°CAvg high
-1°CAvg low
14Rainy days (101 mm)
8:18 hDaylight
08:18Sunrise · 16:36 Sunset
Why this score
- Cold: highs around 4°C
- Frequent rain: about 14 rainy days
- Nights fall to about -1°C
- Rain varies a lot between years (±5.5 days)
What to wear and pack
- Winter coat, hat and scarf
- Rain jacket or compact umbrella
- Gloves for freezing mornings
How reliable is the forecast?
Rain in December varies a lot between years (±5.5 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 | 4°C | -2°C | 83 mm | 13 | – | – | 4.1 |
| February | 5°C | -2°C | 75 mm | 12 | – | – | 4.5 |
| March | 10°C | 1°C | 90 mm | 14 | – | – | 5.1 |
| April | 14°C | 4°C | 103 mm | 16 | – | – | 5.6 |
| May | 18°C | 8°C | 147 mm | 18 | – | – | 5.7 |
| June | 21°C | 12°C | 140 mm | 17 | – | – | 6.4 |
| July | 23°C | 14°C | 146 mm | 17 | – | – | 6.5 |
| August | 23°C | 13°C | 149 mm | 16 | – | – | 6.6 |
| September | 18°C | 10°C | 108 mm | 14 | – | – | 6.6 |
| October | 14°C | 6°C | 101 mm | 13 | – | – | 5.9 |
| November | 8°C | 2°C | 96 mm | 13 | – | – | 4.8 |
| December | 4°C | -1°C | 101 mm | 14 | – | – | 4.0 |
Frequently asked questions
How hot is Grenchen in December?
Daytime highs average 4°C and nights about -1°C.
When is the best time to visit Grenchen?
The best months are August, September, July, June.