Castaic, CA Hourly Weather Forecast
Next 48 Hours
Mon, May 18th 2026
Starting off Sunny skies, turning Clear conditions later in the day. Warming trend from 54°F to 84°. Breezy wind, shifting from ENE to SE at 7.4 mph, with humidity ranging 8% to 69%, and an avg barometric pressure of 29.83 inHg.
| Mon, May 18th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
4 AM Clear UV: 0 |
54°F Feels 53°F |
69% | 4.7 ENE | 29.78 | 43.3°F | 0% |
5 AM ClearUV: 0 |
54°F Feels 52°F |
35% | 4.7 NE | 29.8 | 27.1°F | 0% |
6 AM Sunny UV: 0 |
55°F Feels 55°F |
21% | 5.6 NE | 29.82 | 14.1°F | 0% |
7 AM SunnyUV: 0.3 |
60°F Feels 60°F |
19% | 6.3 NE | 29.84 | 15.6°F | 0% |
8 AM SunnyUV: 1.2 |
64°F Feels 64°F |
16% | 9.2 NE | 29.85 | 18.3°F | 0% |
9 AM SunnyUV: 2.9 |
68°F Feels 68°F |
15% | 13.2 NE | 29.85 | 18.8°F | 0% |
10 AM SunnyUV: 5.2 |
73°F Feels 72°F |
13% | 13.9 NE | 29.84 | 18.8°F | 0% |
11 AM SunnyUV: 7.4 |
78°F Feels 75°F |
12% | 14.5 ENE | 29.84 | 21.6°F | 0% |
12 PM SunnyUV: 9 |
81°F Feels 78°F |
10% | 13.4 ENE | 29.83 | 21.1°F | 0% |
1 PM SunnyUV: 9.5 |
84°F Feels 80°F |
9% | 12.1 ENE | 29.82 | 20°F | 0% |
2 PM SunnyUV: 8.7 |
82°F Feels 79°F |
8% | 10.3 ENE | 29.8 | 18.5°F | 0% |
3 PM SunnyUV: 6.9 |
81°F Feels 78°F |
13% | 7.8 ENE | 29.79 | 24.3°F | 0% |
4 PM SunnyUV: 4.6 |
79°F Feels 76°F |
15% | 3.4 ENE | 29.78 | 28.7°F | 0% |
5 PM SunnyUV: 2.5 |
75°F Feels 76°F |
22% | 5.1 SSW | 29.78 | 35°F | 0% |
6 PM SunnyUV: 1 |
70°F Feels 70°F |
36% | 9.8 SW | 29.81 | 43.4°F | 0% |
7 PM SunnyUV: 0.2 |
63°F Feels 63°F |
51% | 6.9 SW | 29.85 | 47.2°F | 0% |
8 PM ClearUV: 0 |
59°F Feels 59°F |
66% | 2 W | 29.88 | 44.1°F | 0% |
9 PM ClearUV: 0 |
56°F Feels 57°F |
68% | 2.2 N | 29.9 | 44°F | 0% |
10 PM ClearUV: 0 |
55°F Feels 55°F |
68% | 2 ENE | 29.91 | 43.4°F | 0% |
11 PM ClearUV: 0 |
54°F Feels 54°F |
68% | 1.6 SE | 29.91 | 43.3°F | 0% |
Tue, May 19th 2026
Sunny skies giving way to Clear conditions by evening. Warming trend from 51°F to 83°. Light winds, shifting from SSE to SE at 4.1 mph, with humidity levels between 13% to 68%, and an avg barometric pressure of 29.9 inHg.
| Tue, May 19th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM ClearUV: 0 |
53°F Feels 53°F |
68% | 1.1 SSE | 29.91 | 42.4°F | 0% |
1 AM ClearUV: 0 |
52°F Feels 52°F |
68% | 1.1 SSE | 29.91 | 41.9°F | 0% |
2 AM ClearUV: 0 |
52°F Feels 52°F |
68% | 0.2 ESE | 29.91 | 41.2°F | 0% |
3 AM ClearUV: 0 |
51°F Feels 51°F |
68% | 0.7 E | 29.91 | 40.6°F | 0% |
4 AM ClearUV: 0 |
51°F Feels 51°F |
66% | 2 NNE | 29.9 | 39.8°F | 0% |
5 AM ClearUV: 0 |
51°F Feels 51°F |
62% | 2.5 NNE | 29.91 | 38.2°F | 0% |
6 AM SunnyUV: 0 |
55°F Feels 55°F |
55% | 3.6 NNE | 29.91 | 35.8°F | 0% |
7 AM SunnyUV: 0.3 |
61°F Feels 61°F |
45% | 4 NE | 29.93 | 36.8°F | 0% |
8 AM SunnyUV: 1.2 |
67°F Feels 67°F |
35% | 2.2 ENE | 29.93 | 38.9°F | 0% |
9 AM SunnyUV: 2.8 |
71°F Feels 71°F |
28% | 1.6 ESE | 29.93 | 37.3°F | 0% |
10 AM SunnyUV: 5 |
76°F Feels 74°F |
21% | 2 ESE | 29.91 | 33.6°F | 0% |
11 AM SunnyUV: 7.2 |
79°F Feels 76°F |
16% | 3.1 ESE | 29.9 | 29.4°F | 0% |
12 PM SunnyUV: 8.8 |
81°F Feels 78°F |
14% | 4 SE | 29.9 | 27.7°F | 0% |
1 PM SunnyUV: 9.2 |
83°F Feels 79°F |
13% | 4.3 S | 29.88 | 28.3°F | 0% |
2 PM SunnyUV: 8.4 |
83°F Feels 80°F |
15% | 8.1 SW | 29.87 | 31.7°F | 0% |
3 PM SunnyUV: 6.6 |
82°F Feels 79°F |
19% | 12.5 SW | 29.87 | 37.2°F | 0% |
4 PM SunnyUV: 4.4 |
81°F Feels 78°F |
25% | 14.3 SW | 29.86 | 41.8°F | 0% |
5 PM SunnyUV: 2.3 |
79°F Feels 77°F |
28% | 11.6 SW | 29.87 | 43.1°F | 0% |
6 PM SunnyUV: 0.9 |
76°F Feels 76°F |
30% | 7.6 SW | 29.87 | 43.4°F | 0% |
7 PM SunnyUV: 0.2 |
68°F Feels 68°F |
37% | 5.6 WSW | 29.89 | 44.9°F | 0% |
8 PM ClearUV: 0 |
63°F Feels 63°F |
50% | 3.4 W | 29.92 | 42.2°F | 0% |
9 PM ClearUV: 0 |
61°F Feels 61°F |
54% | 0.9 NW | 29.93 | 42.1°F | 0% |
10 PM ClearUV: 0 |
59°F Feels 59°F |
53% | 1.3 ESE | 29.94 | 41°F | 0% |
11 PM ClearUV: 0 |
58°F Feels 58°F |
53% | 1.8 SE | 29.94 | 40.7°F | 0% |
Wed, May 20th 2026
Clear conditions expected later. Temps range from 55° to 57°. Calm winds from the SSE at 1.1 mph, with humidity ranging 57% to 62%, and an avg barometric pressure of 29.94 inHg.
| Wed, May 20th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM ClearUV: 0 |
57°F Feels 57°F |
57% | 1.6 SSE | 29.94 | 41.8°F | 0% |
1 AM ClearUV: 0 |
56°F Feels 56°F |
61% | 1.3 SSE | 29.94 | 42.3°F | 0% |
2 AM ClearUV: 0 |
55°F Feels 55°F |
62% | 0.9 SSE | 29.94 | 42°F | 0% |
3 AM ClearUV: 0 |
55°F Feels 55°F |
62% | 0.7 N | 29.93 | 41.3°F | 0% |
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 |
58°F |
29.8 inHg.
Barometer 84%
Humidity ENE 4mph Wind |
| Partly cloudy | ||
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