San Jose in December
6.1out of 10
Possible, with caveats
Warm and comfortable: highs around 27°C. Very wet: about 29 rainy days.
27°CAvg high
25°CAvg low
29Rainy days (389 mm)
11:24 hDaylight
05:52Sunrise · 17:16 Sunset
Why this score
- Warm and comfortable: highs around 27°C
- Very wet: about 29 rainy days
What to wear and pack
- T-shirts and light layers
- Shorts or a light skirt
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in December is fairly consistent from year to year (1.7 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 | 27°C | 25°C | 363 mm | 28 | – | – | 6.1 |
| February | 26°C | 25°C | 277 mm | 23 | – | – | 6.1 |
| March | 27°C | 25°C | 211 mm | 24 | – | – | 6.1 |
| April | 27°C | 26°C | 136 mm | 22 | – | – | 6.1 |
| May | 28°C | 26°C | 129 mm | 22 | – | – | 6.1 |
| June | 28°C | 26°C | 171 mm | 23 | – | – | 6.1 |
| July | 28°C | 26°C | 159 mm | 21 | – | – | 6.1 |
| August | 29°C | 27°C | 115 mm | 18 | – | – | 6.6 |
| September | 28°C | 26°C | 130 mm | 19 | – | – | 6.3 |
| October | 28°C | 26°C | 191 mm | 24 | – | – | 6.1 |
| November | 27°C | 26°C | 309 mm | 26 | – | – | 6.1 |
| December | 27°C | 25°C | 389 mm | 29 | – | – | 6.1 |
Frequently asked questions
How hot is San Jose in December?
Daytime highs average 27°C and nights about 25°C.
When is the best time to visit San Jose?
The best months are August, September, January, February.