Castro Valley Hourly Forecast
Next 48 Hours
Rest Of Tonight
Partly cloudy late in the evening then becoming mostly cloudy. A slight chance of drizzle after midnight. Lows in the 40s. Light winds...becoming southeast around 5 mph after midnight.
Wednesday
Breezy. A slight chance of drizzle in the morning, then rain likely in the afternoon. Highs in the mid 60s. Southeast winds 10 to 20 mph increasing to south 20 to 30 mph in the afternoon.
| Tue, Nov 12th | Temp | Humidity | Wind (mph) | Pressure | Dew Point | Precip. |
|---|---|---|---|---|---|---|
11 PM Mist UV Index: 0 |
49°F Feels 49°F |
97% | 1.3 WSW | 30.18 inHg | 48.4°F | 0% |
Wednesday Night
Mostly cloudy. A slight chance of drizzle in the evening, then a chance of drizzle and showers after midnight. Patchy fog after midnight. Lows near 50. South winds 10 to 20 mph...becoming southwest 5 to 10 mph after midnight.
Thursday
Mostly cloudy. Patchy fog in the morning. A chance of showers in the morning. A chance of drizzle. Highs in the lower to mid 60s. Southwest winds around 5 mph increasing to west 10 to 20 mph in the afternoon. Chance of showers 50 percent.
| Wed, Nov 13th | Temp | Humidity | Wind (mph) | Pressure | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM MistUV Index: 0 |
48°F Feels 48°F |
96% | 1.3 S | 30.17 inHg | 47°F | 0% |
1 AM MistUV Index: 0 |
47°F Feels 47°F |
96% | 0.9 S | 30.16 inHg | 45.8°F | 0% |
2 AM MistUV Index: 0 |
47°F Feels 47°F |
96% | 1.6 SE | 30.15 inHg | 45.3°F | 0% |
3 AM MistUV Index: 0 |
47°F Feels 46°F |
96% | 1.8 SSE | 30.14 inHg | 45.8°F | 0% |
4 AM MistUV Index: 0 |
47°F Feels 46°F |
96% | 2 SSE | 30.12 inHg | 45.7°F | 0% |
5 AM MistUV Index: 0 |
47°F Feels 45°F |
96% | 2.5 SE | 30.12 inHg | 45.5°F | 0% |
6 AM MistUV Index: 0 |
46°F Feels 45°F |
96% | 2.7 SSE | 30.11 inHg | 45.1°F | 0% |
7 AM Mist UV Index: 0 |
46°F Feels 45°F |
96% | 3.1 SSE | 30.11 inHg | 44.7°F | 0% |
8 AM MistUV Index: 0.2 |
46°F Feels 44°F |
96% | 4.3 SSE | 30.11 inHg | 44.7°F | 0% |
9 AM MistUV Index: 0.8 |
47°F Feels 45°F |
95% | 4 SSE | 30.12 inHg | 44.9°F | 0% |
10 AM Cloudy  UV Index: 1.6 |
50°F Feels 48°F |
93% | 4.5 SSE | 30.14 inHg | 46.1°F | 0% |
11 AM Partly Cloudy  UV Index: 2.5 |
53°F Feels 51°F |
81% | 6 SSE | 30.13 inHg | 47.2°F | 0% |
12 PM Partly Cloudy UV Index: 2.8 |
55°F Feels 52°F |
74% | 7.6 S | 30.12 inHg | 48.8°F | 0% |
1 PM Overcast  UV Index: 2.3 |
55°F Feels 52°F |
74% | 10.5 S | 30.1 inHg | 48.8°F | 0% |
2 PM Overcast UV Index: 0.8 |
54°F Feels 51°F |
84% | 10.3 S | 30.09 inHg | 49.9°F | 0% |
3 PM Overcast UV Index: 0.4 |
53°F Feels 49°F |
91% | 8.7 SSW | 30.08 inHg | 50.7°F | 0% |
4 PM Overcast UV Index: 0 |
52°F Feels 49°F |
92% | 6.7 SSW | 30.08 inHg | 49.2°F | 0% |
5 PM Light Rain UV Index: 0 |
52°F Feels 49°F |
92% | 8.1 SW | 30.08 inHg | 49.1°F | 100% Rain est. 0.05in |
6 PM Overcast  UV Index: 0 |
52°F Feels 49°F |
93% | 6.3 SSW | 30.08 inHg | 49.8°F | 0% |
7 PM Overcast UV Index: 0 |
52°F Feels 49°F |
91% | 5.8 SW | 30.09 inHg | 49.3°F | 0% |
8 PM Overcast UV Index: 0 |
52°F Feels 50°F |
90% | 5.1 SSW | 30.1 inHg | 48.9°F | 0% |
9 PM Overcast UV Index: 0 |
52°F Feels 50°F |
90% | 4 SW | 30.11 inHg | 49.1°F | 0% |
10 PM Partly Cloudy  UV Index: 0 |
54°F Feels 53°F |
90% | 3.8 WSW | 30.11 inHg | 49.1°F | 0% |
11 PM Patchy Rain Nearby UV Index: 0 |
53°F Feels 52°F |
84% | 3.6 WSW | 30.1 inHg | 51°F | 100% |
Thursday Night
Mostly cloudy. A chance of drizzle. Lows in the 40s. West winds 10 to 20 mph.
Friday
Mostly cloudy. A chance of drizzle and rain. Highs near 60.
| Thu, Nov 14th | Temp | Humidity | Wind (mph) | Pressure | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM Partly Cloudy UV Index: 0 |
53°F Feels 52°F |
91% | 3.4 WSW | 30.1 inHg | 49.9°F | 0% |
1 AM Partly Cloudy UV Index: 0 |
53°F Feels 52°F |
92% | 3.1 W | 30.09 inHg | 50.3°F | 0% |
2 AM Cloudy  UV Index: 0 |
52°F Feels 52°F |
93% | 3.1 W | 30.09 inHg | 50.7°F | 0% |
3 AM Cloudy UV Index: 0 |
52°F Feels 52°F |
93% | 1.6 W | 30.07 inHg | 50.2°F | 0% |
4 AM Cloudy UV Index: 0 |
52°F Feels 51°F |
94% | 1.8 WSW | 30.07 inHg | 50°F | 0% |
5 AM Cloudy UV Index: 0 |
52°F Feels 51°F |
94% | 1.3 WSW | 30.06 inHg | 49.8°F | 0% |
6 AM Cloudy UV Index: 0 |
52°F Feels 52°F |
94% | 1.6 WSW | 30.05 inHg | 50.4°F | 0% |
7 AM Cloudy UV Index: 0 |
52°F Feels 52°F |
94% | 1.3 WSW | 30.05 inHg | 50.8°F | 0% |
8 AM MistUV Index: 0.2 |
53°F Feels 52°F |
94% | 1.1 SW | 30.05 inHg | 51.1°F | 0% |
9 AM MistUV Index: 0.7 |
53°F Feels 53°F |
90% | 1.1 SW | 30.04 inHg | 50.8°F | 0% |
10 AM MistUV Index: 1.4 |
54°F Feels 53°F |
89% | 2 WSW | 30.04 inHg | 50.6°F | 0% |
11 AM Overcast UV Index: 2.1 |
55°F Feels 53°F |
87% | 3.1 W | 30.04 inHg | 50.5°F | 0% |
12 PM Overcast UV Index: 2.5 |
55°F Feels 54°F |
83% | 4.9 W | 30.01 inHg | 50°F | 0% |
1 PM Overcast UV Index: 2.3 |
56°F Feels 54°F |
81% | 6 W | 30 inHg | 49.8°F | 0% |
2 PM Cloudy UV Index: 1.7 |
55°F Feels 53°F |
79% | 6.9 W | 29.98 inHg | 49.6°F | 0% |
3 PM Cloudy UV Index: 0.9 |
54°F Feels 52°F |
82% | 8.7 W | 29.96 inHg | 48.9°F | 0% |
4 PM Cloudy UV Index: 0.3 |
54°F Feels 51°F |
83% | 9.2 W | 29.95 inHg | 48.5°F | 0% |
5 PM Cloudy UV Index: 0 |
53°F Feels 50°F |
85% | 8.7 W | 29.94 inHg | 48.2°F | 0% |
6 PM Cloudy UV Index: 0 |
52°F Feels 49°F |
88% | 7.2 W | 29.93 inHg | 48.2°F | 0% |
7 PM Cloudy UV Index: 0 |
51°F Feels 49°F |
90% | 6 W | 29.93 inHg | 48.2°F | 0% |
8 PM Thundery Outbreaks Nearby UV Index: 0 |
51°F Feels 48°F |
91% | 5.8 W | 29.92 inHg | 48.2°F | 0% |
9 PM Thundery Outbreaks NearbyUV Index: 0 |
50°F Feels 47°F |
92% | 6 W | 29.92 inHg | 47.8°F | 0% |
10 PM Thundery Outbreaks NearbyUV Index: 0 |
51°F Feels 49°F |
92% | 5.6 W | 29.92 inHg | 47.6°F | 0% |
Currently
 |
51°F |
30.19in
Barometer 74%
Humidity North 0.0mph Wind |
| Fair | ||
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