Millbrae in September
8.5out of 10
Yes, a good time to go
Mild: highs around 19°C. Very dry: about 0 rainy days.
19°CAvg high
14°CAvg low
0Rainy days (2 mm)
12:14 hDaylight
06:57Sunrise · 19:11 Sunset
Why this score
- Mild: highs around 19°C
- Very dry: about 0 rainy days
What to wear and pack
- Layers you can add or remove
- Comfortable walking shoes
How reliable is the forecast?
Rainfall in September is fairly consistent from year to year (0.6 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 | 13°C | 9°C | 102 mm | 10 | – | – | 6.3 |
| February | 14°C | 10°C | 107 mm | 10 | – | – | 6.4 |
| March | 14°C | 10°C | 77 mm | 9 | – | – | 6.7 |
| April | 15°C | 10°C | 39 mm | 6 | – | – | 7.1 |
| May | 15°C | 11°C | 18 mm | 3 | – | – | 7.6 |
| June | 17°C | 12°C | 4 mm | 1 | – | – | 8.1 |
| July | 17°C | 13°C | 0 mm | 0 | – | – | 8.4 |
| August | 18°C | 14°C | 1 mm | 0 | – | – | 8.5 |
| September | 19°C | 14°C | 2 mm | 0 | – | – | 8.5 |
| October | 18°C | 13°C | 22 mm | 3 | – | – | 8.0 |
| November | 15°C | 11°C | 53 mm | 6 | – | – | 7.2 |
| December | 13°C | 9°C | 101 mm | 10 | – | – | 6.3 |
Frequently asked questions
How hot is Millbrae in September?
Daytime highs average 19°C and nights about 14°C.
When is the best time to visit Millbrae?
The best months are August, September, July, June.