Past Weather in Castro Valley — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
56
59
62
65
68
71
74
77
80
83
86
Wed, Aug 13
Lo:66
12 pm
Hi:70
13
Lo:61
6 pm
Hi:64
9
Thu, Aug 14
Lo:61
12 am
Hi:63
8
Lo:61
6 am
Hi:70
5
Lo:64
12 pm
Hi:72
12
Lo:61
6 pm
Hi:63
7
Fri, Aug 15
Lo:59
12 am
Hi:61
2
Lo:59
6 am
Hi:70
3
Lo:68
12 pm
Hi:72
11
Lo:63
6 pm
Hi:66
9
Sat, Aug 16
Lo:63
12 am
Hi:64
11
Lo:63
6 am
Hi:66
7
Lo:66
12 pm
Hi:70
11
Lo:63
6 pm
Hi:70
8
Sun, Aug 17
Lo:61
12 am
Hi:63
10
Lo:61
6 am
Hi:66
11
Lo:70
12 pm
Hi:70
14
Lo:63
6 pm
Hi:66
12
Mon, Aug 18
Lo:59
12 am
Hi:63
6
Lo:61
6 am
Hi:70
6
Lo:72
12 pm
Hi:73
14
Lo:63
6 pm
Hi:70
9
Tue, Aug 19
Lo:57
12 am
Hi:63
3
Lo:61
6 am
Hi:70
6
Lo:70
12 pm
Hi:72
13
Lo:63
6 pm
Hi:66
6
Wed, Aug 20
Lo:57
12 am
Hi:63
4
Lo:57
6 am
Hi:75
4
Lo:73
12 pm
Hi:84
11
Lo:63
6 pm
Hi:72
4
Thu, Aug 21
Lo:61
12 am
Hi:63
1
Lo:61
6 am
Hi:79
2
Lo:75
12 pm
Hi:84
11
Lo:61
6 pm
Hi:72
5
Fri, Aug 22
Lo:57
12 am
Hi:61
7
Lo:57
6 am
Hi:70
6
Lo:70
12 pm
Hi:75
11
Lo:59
6 pm
Hi:66
7
Sat, Aug 23
Lo:57
12 am
Hi:57
6
Lo:57
6 am
Hi:70
3
Lo:64
12 pm
Hi:70
15
Lo:63
6 pm
Hi:64
9
Sun, Aug 24
Lo:61
12 am
Hi:61
7
Lo:61
6 am
Hi:64
7
Lo:66
12 pm
Hi:70
12
Lo:63
6 pm
Hi:64
8
Mon, Aug 25
Lo:61
12 am
Hi:63
6
Lo:63
6 am
Hi:70
5
Lo:68
12 pm
Hi:72
15
Lo:63
6 pm
Hi:66
7
Tue, Aug 26
Lo:63
12 am
Hi:63
4
Lo:63
6 am
Hi:72
6
Lo:70
12 pm
Hi:75
14
Lo:63
6 pm
Hi:66
9
Wed, Aug 27
Lo:61
12 am
Hi:63
3
Lo:61
6 am
Hi:72
6
Lo:72
12 pm
Hi:75
14
Lo:63
6 pm
Hi:70
7
Thu, Aug 28
Lo:61
12 am
Hi:61
2
Lo:61
6 am
Hi:68
7
Lo:72
12 pm
Hi:77
8
Wednesday, August 13, 2025, 12:00 pm — 6:00 pm
70 / 66 °F
Scattered clouds.
Humidity: 71%
Barometer: 29.99 "Hg
NW
Wind: 13.05 mph
Castro Valley Temperature Yesterday
Maximum temperature yesterday: 75 °F (at 1:54 pm)
Minimum temperature yesterday: 61 °F (at 1:54 am)
Average temperature yesterday: 66 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 85 °F (Aug 21, 1:54 pm) | 93% (Aug 22, 2:54 am) | 30.12 "Hg (Aug 22, 2:54 am) |
| Low | 57 °F (Aug 23, 3:07 am) | 37% (Aug 21, 1:54 pm) | 29.85 "Hg (Aug 22, 5:54 pm) |
| Average | 65 °F | 76% | 29.99 "Hg |
| * Reported Aug 13 2:54 pm — Aug 28 2:54 pm, Castro Valley. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
Castro Valley Weather History for the Previous 24 Hours
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 2:54 pm Thu, Aug 28 |  | 77 °F | Sunny. | 8 mph | ↑ | 47% | 30.03 "Hg | 10 mi |
| 1:54 pm | | 76 °F | Sunny. | 8 mph | ↑ | 47% | 30.06 "Hg | 10 mi |
| 12:54 pm | | 72 °F | Sunny. | 8 mph | ↑ | 55% | 30.08 "Hg | 10 mi |
| 11:54 am | | 68 °F | Sunny. | 7 mph | ↑ | 65% | 30.10 "Hg | 10 mi |
| 10:54 am |  | 66 °F | Passing clouds. | 9 mph | ↑ | 70% | 30.11 "Hg | 10 mi |
| 9:54 am |  | 64 °F | Partly sunny. | 5 mph | ↑ | 75% | 30.12 "Hg | 10 mi |
| 8:54 am |  | 64 °F | Overcast. | 8 mph | ↑ | 75% | 30.11 "Hg | 10 mi |
| 7:54 am | | 63 °F | Overcast. | 6 mph | ↑ | 78% | 30.10 "Hg | 10 mi |
| 6:54 am | | 61 °F | Partly sunny. | 6 mph | ↑ | 81% | 30.09 "Hg | 10 mi |
| 5:54 am |  | 61 °F | Overcast. | 3 mph | ↑ | 83% | 30.08 "Hg | 10 mi |
| 4:54 am | | 60 °F | Overcast. | No wind | ↑ | 83% | 30.09 "Hg | 10 mi |
| 3:54 am |  | 60 °F | Passing clouds. | 3 mph | ↑ | 83% | 30.08 "Hg | 10 mi |
| 3:17 am | | 60 °F | Passing clouds. | 5 mph | ↑ | 83% | 30.06 "Hg | 10 mi |
| 2:54 am |  | 61 °F | Clear. | 3 mph | ↑ | 81% | 30.08 "Hg | 10 mi |
| 1:54 am | | 61 °F | Passing clouds. | No wind | ↑ | 83% | 30.09 "Hg | 10 mi |
| 11:54 pm Wed, Aug 27 | | 63 °F | Clear. | 6 mph | ↑ | 75% | 30.10 "Hg | 10 mi |
| 10:54 pm | | 62 °F | Clear. | 5 mph | ↑ | 78% | 30.09 "Hg | 10 mi |
| 9:54 pm | | 63 °F | Clear. | 5 mph | ↑ | 75% | 30.08 "Hg | 10 mi |
| 8:54 pm | | 65 °F | Clear. | 7 mph | ↑ | 73% | 30.07 "Hg | 10 mi |
| 7:54 pm | | 66 °F | Clear. | 9 mph | ↑ | 70% | 30.04 "Hg | 10 mi |
| 6:54 pm | | 69 °F | Sunny. | 12 mph | ↑ | 61% | 30.03 "Hg | 10 mi |
| 5:54 pm | | 71 °F | Sunny. | 14 mph | ↑ | 59% | 30.03 "Hg | 10 mi |
| 4:54 pm | | 71 °F | Sunny. | 15 mph | ↑ | 57% | 30.03 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||