Hourly Weather Forecast - Portola, CA

12 AM
29°F
10%
4mph
SW
Foggy
Humidity
100%
Feels like
25°F
Dew Point
29°F
1 AM
30°F
10%
4mph
SW
Mostly Cloudy
Humidity
96%
Feels like
26°F
Dew Point
29°F
2 AM
30°F
10%
4mph
SW
Mostly Cloudy
Humidity
93%
Feels like
26°F
Dew Point
28°F
3 AM
30°F
0%
4mph
WSW
Mostly Cloudy
Humidity
92%
Feels like
26°F
Dew Point
28°F
4 AM
31°F
0%
4mph
WSW
Cloudy
Humidity
90%
Feels like
26°F
Dew Point
28°F
5 AM
31°F
0%
5mph
SW
Cloudy
Humidity
87%
Feels like
27°F
Dew Point
28°F
6 AM
32°F
0%
5mph
WSW
Cloudy
Humidity
87%
Feels like
27°F
Dew Point
29°F
7 AM
34°F
10%
6mph
SW
Cloudy
Humidity
81%
Feels like
29°F
Dew Point
29°F
7:17 AM
8 AM
38°F
10%
6mph
SW
Cloudy
Humidity
71%
Feels like
33°F
Dew Point
30°F
9 AM
44°F
10%
7mph
SW
Cloudy
Humidity
60%
Feels like
40°F
Dew Point
31°F
10 AM
49°F
10%
8mph
SW
Cloudy
Humidity
53%
Feels like
46°F
Dew Point
33°F
11 AM
53°F
10%
9mph
SW
Cloudy
Humidity
50%
Feels like
53°F
Dew Point
35°F
12 PM
55°F
10%
11mph
SW
Cloudy
Humidity
49%
Feels like
55°F
Dew Point
36°F
1 PM
56°F
10%
11mph
SW
Cloudy
Humidity
50%
Feels like
56°F
Dew Point
38°F
2 PM
56°F
10%
11mph
SW
Mostly Cloudy
Humidity
52%
Feels like
56°F
Dew Point
39°F
3 PM
53°F
10%
11mph
SW
Mostly Cloudy
Humidity
59%
Feels like
53°F
Dew Point
39°F
4 PM
48°F
10%
10mph
SW
Mostly Cloudy
Humidity
70%
Feels like
44°F
Dew Point
39°F
4:39 PM
5 PM
43°F
10%
10mph
SW
Mostly Cloudy
Humidity
83%
Feels like
38°F
Dew Point
38°F
6 PM
40°F
10%
10mph
SW
Mostly Cloudy
Humidity
91%
Feels like
34°F
Dew Point
38°F
7 PM
38°F
10%
10mph
SW
Mostly Cloudy
Humidity
94%
Feels like
31°F
Dew Point
37°F
8 PM
37°F
10%
10mph
SW
Partly Cloudy
Humidity
95%
Feels like
30°F
Dew Point
36°F
9 PM
36°F
10%
10mph
SW
Partly Cloudy
Humidity
96%
Feels like
28°F
Dew Point
35°F
10 PM
35°F
10%
10mph
SW
Partly Cloudy
Humidity
95%
Feels like
27°F
Dew Point
34°F
11 PM
34°F
30%
10mph
SW
30% Chance Rain Showers
Humidity
95%
Feels like
27°F
Dew Point
33°F

Rainfall Totals Through Wednesday A.M.

Heavy Rain Returns to Deluge Pacific Northwest

Another atmospheric river will hit the Pacific Northwest with heavy rain and high winds.

Monday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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