Santa Rosa in December
6.4out of 10
Possible, with caveats
Hot: daytime highs around 31°C. Frequent rain: about 13 rainy days.
31°CAvg high
20°CAvg low
13Rainy days (160 mm)
13:45 hDaylight
05:41Sunrise · 19:27 Sunset
Why this score
- Hot: daytime highs around 31°C
- Frequent rain: about 13 rainy days
- Rain varies a lot between years (±4.3 days)
What to wear and pack
- Light, breathable clothing
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in December varies a lot between years (±4.3 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 | 31°C | 21°C | 143 mm | 15 | – | – | 6.2 |
| February | 31°C | 20°C | 137 mm | 14 | – | – | 6.4 |
| March | 30°C | 19°C | 126 mm | 12 | – | – | 7.1 |
| April | 27°C | 17°C | 155 mm | 10 | – | – | 7.5 |
| May | 23°C | 13°C | 152 mm | 9 | – | – | 7.5 |
| June | 21°C | 12°C | 143 mm | 10 | – | – | 7.3 |
| July | 20°C | 11°C | 137 mm | 10 | – | – | 7.3 |
| August | 23°C | 12°C | 94 mm | 8 | – | – | 7.9 |
| September | 24°C | 14°C | 151 mm | 10 | – | – | 7.4 |
| October | 27°C | 16°C | 215 mm | 13 | – | – | 6.8 |
| November | 29°C | 17°C | 157 mm | 11 | – | – | 7.3 |
| December | 31°C | 20°C | 160 mm | 13 | – | – | 6.4 |
Frequently asked questions
How hot is Santa Rosa in December?
Daytime highs average 31°C and nights about 20°C.
When is the best time to visit Santa Rosa?
The best months are August, April, May, September.