Napa Valley · WinterMonth summary
Napa Valley weather in December
⚠️ Fair
🌡️ Temperature min / max
41°F – 55°F
🌧 Rainy days
32% of days
☀️ Sunshine
8.0h per day on average
🌊 🌊 Season
Winter
⭐ ⭐ Weather score
5.3/10
📅 📅 Best month
June (9.4/10)
Quick decision
Should you visit Napa Valley in December?
⚠️ Fair
✅ Yes if: you enjoy winter atmosphere and the lowest prices of the year.
❌ No if: you're looking for sunshine or outdoor activities.
Our take: Not the best window: 32% rain risk and 8.0h of sunshine. June is much safer.
By trip type
Napa Valley in December by trip type
- 🏙️ 🏙️ City break / culture : ⚠️ Possible
- 🚶 🚶 Outdoor activities : ❌ Not recommended
- 🏖️ Beach / swimming : — No sea access
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in December
In December, Napa Valley sees 13°F during the day with 8.0h of sunshine per day. Expect rain on 32% of days — a light raincoat in the bag is recommended.
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All months for Napa Valley
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| ⛅ January | 41°F | 55°F | 35% | 0.2in | 8.3h | 5.1/10 |
| ⛅ February | 41°F | 57°F | 25% | 0.2in | 10.0h | 7.0/10 |
| ⛅ March | 43°F | 59°F | 36% | 0.1in | 11.0h | 7.0/10 |
| 🌤️ April | 46°F | 68°F | 16% | 0.0in | 12.4h | 7.9/10 |
| ☀️ May | 50°F | 77°F | 10% | 0.0in | 13.9h | 9.2/10 |
| ☀️ June | 55°F | 86°F | 2% | 0.0in | 14.1h | 9.4/10 |
| ☀️ July | 57°F | 91°F | 0% | 0.0in | 14.0h | 8.4/10 |
| ☀️ August | 59°F | 91°F | 0% | 0.0in | 13.1h | 8.2/10 |
| ☀️ September | 57°F | 86°F | 4% | 0.0in | 12.0h | 8.9/10 |
| ☀️ October | 52°F | 77°F | 11% | 0.1in | 10.3h | 8.5/10 |
| ⛅ November | 45°F | 63°F | 20% | 0.1in | 9.6h | 7.1/10 |
| ⛅ December | 41°F | 55°F | 32% | 0.2in | 8.0h | 5.3/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In December, Napa Valley averages 55°F, 32% rainy days and 8.0h of sunshine per day. Overall weather score: 5.3/10.
See methodology →
Comparison
December vs June (best month)
The best month is June (score 9.4/10). Difference:
- 🌡️ Max temperature : +17°F
- 🌧 Rainy days : -30%
- ☀️ Sunshine : +6.1h/day
FAQ
FAQ — Napa Valley in December
Is December a good time to visit Napa Valley?
December is not recommended for Napa Valley (score 5.3/10). With 32% rainy days and 8.0h of sunshine, consider June (9.4/10) instead.
What's the weather like in Napa Valley in December?
It's cool with 55°F daytime and 41°F at night. 8.0h of sunshine per day. Pack warm clothes and favour indoor visits.
Accommodation
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Activities & tours
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