Portola, California 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Portola CA
National Weather Service Forecast for:
Portola CA
Issued by: National Weather Service Reno, NV |
Updated: 10:16 am PDT Jul 13, 2025 |
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Today
 Areas Smoke
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Tonight
 Mostly Clear
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Monday
 Areas Smoke then Sunny
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Monday Night
 Clear
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Tuesday
 Sunny
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Tuesday Night
 Clear
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Wednesday
 Sunny
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Wednesday Night
 Clear
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Thursday
 Sunny
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Hi 98 °F |
Lo 55 °F |
Hi 96 °F |
Lo 53 °F |
Hi 90 °F |
Lo 50 °F |
Hi 89 °F |
Lo 49 °F |
Hi 88 °F |
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Heat Advisory
Today
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Areas of smoke before noon. Sunny, with a high near 98. East wind 5 to 10 mph becoming west in the afternoon. |
Tonight
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Mostly clear, with a low around 55. West wind 5 to 10 mph becoming light northwest in the evening. |
Monday
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Areas of smoke between 10am and 11am. Sunny, with a high near 96. Calm wind becoming west around 5 mph in the afternoon. |
Monday Night
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Clear, with a low around 53. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph. |
Tuesday
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Sunny, with a high near 90. Light southwest wind becoming west 5 to 10 mph in the afternoon. |
Tuesday Night
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Clear, with a low around 50. West wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph. |
Wednesday
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Sunny, with a high near 89. |
Wednesday Night
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Clear, with a low around 49. |
Thursday
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Sunny, with a high near 88. |
Thursday Night
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Clear, with a low around 48. |
Friday
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Sunny, with a high near 89. |
Friday Night
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Clear, with a low around 48. |
Saturday
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Sunny, with a high near 90. |
Forecast from NOAA-NWS
for Portola CA.
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Weather Forecast Discussion
491
FXUS65 KREV 130747
AFDREV
Area Forecast Discussion
National Weather Service Reno NV
1247 AM PDT Sun Jul 13 2025
.KEY MESSAGES...
* Dangerous heat will continues through Tuesday, with widespread
Moderate to Major HeatRisk across lower areas of western Nevada
and northeast California.
* Plan on a low possibility (5-10% chance) for isolated, high-
based thunderstorms through the weekend, with increasing chances
Monday and Tuesday.
* Hot, dry conditions will marginally subside mid-late next week
with increasing southwest to west winds.
&&
.DISCUSSION...
Summer is in full swing! The Reno Intl Airport hit 101 degrees
yesterday; our first 100+ degree day of the year. For those that
enjoy the heat, great news! We`re going to be even warmer today.
Locations across W NV, including the Reno-Carson-Minden area, will
see highs in the triple digits today and tomorrow while our
friends in Sierra communities will be in the low to mid 90s.
Unfortunately, with relatively high overnight lows, heat recovery
isn`t ideal. Limit time outdoors during peak heating hours
(10a-5p) and make sure to stay hydrated.
As fires continue to rage in N CA and S OR, smoke infiltration
will continue to impact much of the area, bringing hazy skies. Due
to strong surface heating this weekend, though, this brings an
increase in instability. This will allow for a 5-10% chance of
isolated showers and thunderstorms, primarily along the Sierra
each afternoon. As a low pressure system drops down from Canada by
the middle of next week, shower chances increase Tuesday through
Thursday.
That low pressure will also help bring afternoon high
temperatures down to near-normal. We cool down starting Tuesday
but this will be relatively short-lived as another high pressure
system starts to build towards next weekend.
-Giralte
&&
.AVIATION...
VFR conditions prevail through the weekend along with light winds
and typical afternoon W-SW wind gusts up to 20 kts. Expect a 5-10%
chance of isolated thunderstorms each day between 21-03Z,
primarily for Sierra terminals. Primary storm concerns will be
brief outflow gusts and localized turbulence.
The hot temperatures may produce density altitude concerns,
especially for KTRK, KTVL, and KMMH. Slantwise visibility
reductions remain possible with haze from wildfires in northern
California and southern Oregon.
-Giralte/Edan
&&
.REV Watches/Warnings/Advisories...
NV...Heat Advisory until 11 AM PDT Wednesday NVZ001-003>005.
CA...Heat Advisory until 11 AM PDT Wednesday CAZ070-071.
&&
$$
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