Weather · Port Costa
Port Costa forecast & conditions
Current conditions, the 7-day outlook and hour-by-hour details for Port Costa, straight from the National Weather Service. Watches and warnings show up first.
Loading the local forecast…
Climate · a normal year
What a year in Port Costa feels like
Port Costa has warm winters and pleasant summers, with very little rain. A typical July afternoon reaches 81°, a January night drops to 40°, and snow is almost unheard of.
58° / 41°Winter
69° / 47°Spring
81° / 55°Summer
73° / 50°Fall
How much snow does Port Costa get?Almost none.Rain & snow →Does it ever freeze?In about 75% of years.Frost →Is it warmer than it used to be?+1.5° vs. the 20th century.Then & now →
See Port Costa’s full climate →
NOAA U.S. Climate Normals, 1991–2020. A normal is a 30-year average, not a forecast.
The forecast is temporarily unavailable.
Data from the U.S. National Weather Service (weather.gov) — free public data, not modified by TownTapestry. Not a substitute for official warnings; always follow weather.gov and local authorities.