Weather WorldNicasio Reservoir, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Nicasio Reservoir Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY |
 |  |  | |  | | |  | | | | |
| Partly Cloudy | Partly Cloudy | Mostly Clear | Partly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 55°FLo: 13°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C Lo: 51°FLo: 11°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 902 PM PDT Tue Aug 25 2026 
Nicasio Reservoir Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Nicasio Reservoir Weather Map
Nicasio Reservoir Quick Facts
Nicasio Reservoir Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1213 AM PDT Wed Aug 26 2026
Key Messages
Updated at 1209 AM PDT Wed Aug 26 2026- Temperatures near to slightly below seasonal averages persist within the shallow marine layer through Thursday
- Seasonably warm and very dry conditions continue above 1000 feet and the far interior through Thursday
- Pattern change Friday into the weekend brings cooler temperatures and moderate potential for tropical moisture
Aviation
... (06Z TAFS) Issued at 1100 PM PDT Tue Aug 25 2026
VFR prevails with the exception of KSFO and KHAF with stratus cov...