Foster City in August
9.1out of 10
Yes, a good time to go
Warm and comfortable: highs around 23°C. Very dry: about 0 rainy days.
23°CAvg high
14°CAvg low
0Rainy days (1 mm)
13:27 hDaylight
06:30Sunrise · 19:57 Sunset
Why this score
- Warm and comfortable: highs around 23°C
- Very dry: about 0 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
How reliable is the forecast?
Rainfall in August is fairly consistent from year to year (0.4 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 | 14°C | 7°C | 100 mm | 9 | – | – | 6.5 |
| February | 16°C | 8°C | 107 mm | 9 | – | – | 6.7 |
| March | 17°C | 9°C | 81 mm | 9 | – | – | 7.1 |
| April | 18°C | 10°C | 42 mm | 6 | – | – | 7.7 |
| May | 19°C | 11°C | 20 mm | 3 | – | – | 8.2 |
| June | 22°C | 12°C | 4 mm | 1 | – | – | 8.9 |
| July | 23°C | 14°C | 0 mm | 0 | – | – | 9.1 |
| August | 23°C | 14°C | 1 mm | 0 | – | – | 9.1 |
| September | 24°C | 14°C | 2 mm | 0 | – | – | 9.0 |
| October | 22°C | 12°C | 23 mm | 3 | – | – | 8.7 |
| November | 17°C | 10°C | 50 mm | 6 | – | – | 7.6 |
| December | 14°C | 8°C | 94 mm | 9 | – | – | 6.6 |
Frequently asked questions
How hot is Foster City in August?
Daytime highs average 23°C and nights about 14°C.
When is the best time to visit Foster City?
The best months are July, August, September, June.