Skip to content
WeatherSignal logoWeatherSignal
Sign up

Weather for 94978 — Fairfax, CA

Conditions and forecast for the exact centre of ZIP code 94978 (37.987, -122.589), not a nearby airport.

71°

Clear sky

Feels like:
71°
Humidity:
30%
Wind:
11 mph
Dew point:
38°

Source updated: 2:06:45 AM · WeatherSignal checked: 2:06:45 AM

Source: Open-Meteo (national weather-service models)

Next 12 hours in 94978

2 AM

71°

0%

3 AM

69°

0%

4 AM

67°

0%

5 AM

65°

0%

6 AM

63°

0%

7 AM

62°

0%

8 AM

61°

0%

9 AM

63°

0%

10 AM

63°

0%

11 AM

61°

0%

12 PM

59°

0%

1 PM

57°

0%

7 day forecast for 94978

  • Today

    88° / 57°

    0% rain · 12 mph wind

  • Sunday, Oct 18

    84° / 53°

    0% rain · 17 mph wind

  • Monday, Oct 19

    61° / 51°

    0% rain · 18 mph wind

  • Tuesday, Oct 20

    60° / 55°

    0% rain · 10 mph wind

  • Wednesday, Oct 21

    61° / 50°

    0% rain · 4 mph wind

  • Thursday, Oct 22

    66° / 52°

    0% rain · 5 mph wind

  • Friday, Oct 23

    64° / 50°

    0% rain · 8 mph wind

About ZIP code 94978

94978 covers Fairfax in California. Forecasts on this page are generated for the coordinates at the centre of the ZIP code, so small differences from a nearby city forecast are expected and usually correct.

Closest cities with full forecast pages: Richmond (14 mi), San Francisco (17 mi), Berkeley (19 mi), Vallejo (20 mi).

Nearby ZIP codes

Severe weather warnings are issued by the National Weather Service for counties and polygons that may not line up with ZIP code boundaries. Always follow official warnings for your exact address.

Planning your week in Fairfax 94978, California

  • The warmest afternoon ahead is today, reaching about 88°F.
  • The coldest night ahead dips to about 50°F.
  • This is a dry stretch — most days show rain chances under 20%, good for outdoor plans.
  • The breeziest day looks like Monday, with sustained wind near 18 mph.

Common questions about Fairfax 94978, California weather

How accurate is the Fairfax 94978, California forecast?
The next 48 hours are usually reliable on temperature and sky cover, with timing that can shift by an hour or two. Days three and four are dependable for the overall pattern. Beyond that, treat the numbers as a planning direction rather than a promise — we label confidence on every day so you can judge for yourself.
What is the best day this week in Fairfax 94978, California?
No day in the current outlook has a rain chance above 40%, so conditions look favorable for outdoor plans across the week.
Where does this forecast come from?
Forecast values come from national weather model data, and official warnings come from the National Weather Service. We show the source and the last-updated time on every page, and we never invent a number the source did not publish — missing measurements are hidden, not guessed.
How often is this page updated?
The forecast refreshes whenever the source model publishes new data, typically several times a day. The freshness note near the top of the page shows exactly when the numbers you are looking at were issued.

More weather for Fairfax 94978, California

Weather in nearby cities

Weather Signal is free for everyone. Donations keep it running, and a portion goes to our Community Relief program, which helps a household with an essential bill at the end of the month. Members can enter for free without donating.

Donate