Castaic in May
8.8out of 10
Yes, a good time to go
Warm and comfortable: highs around 25°C. Very dry: about 2 rainy days.
25°CAvg high
12°CAvg low
2Rainy days (10 mm)
13:48 hDaylight
05:57Sunrise · 19:45 Sunset
Why this score
- Warm and comfortable: highs around 25°C
- Very dry: about 2 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 May is fairly consistent from year to year (2.2 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 | 16°C | 5°C | 70 mm | 6 | – | – | 7.3 |
| February | 17°C | 6°C | 81 mm | 7 | – | – | 7.3 |
| March | 19°C | 7°C | 56 mm | 6 | – | – | 7.8 |
| April | 22°C | 9°C | 22 mm | 4 | – | – | 8.6 |
| May | 25°C | 12°C | 10 mm | 2 | – | – | 8.8 |
| June | 28°C | 15°C | 2 mm | 0 | – | – | 9.0 |
| July | 31°C | 18°C | 3 mm | 1 | – | – | 8.5 |
| August | 32°C | 18°C | 1 mm | 0 | – | – | 8.3 |
| September | 30°C | 16°C | 4 mm | 1 | – | – | 8.8 |
| October | 25°C | 12°C | 15 mm | 2 | – | – | 8.8 |
| November | 20°C | 8°C | 18 mm | 3 | – | – | 8.3 |
| December | 15°C | 5°C | 50 mm | 5 | – | – | 7.3 |
Frequently asked questions
How hot is Castaic in May?
Daytime highs average 25°C and nights about 12°C.
When is the best time to visit Castaic?
The best months are June, May, September, October.