2025 Compare Cities Climate:
Portola Valley, CA vs Hillsborough, CA

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Highlights
- Hillsborough has 24.1% less rainy days than Portola Valley.
- Hillsborough has 0.8% less Sunny Days than Portola Valley.
- On the BestPlaces comfort index, Hillsborough scores 0.0% worse than Portola Valley
 Portola Valley, CAHillsborough, CAUnited States
 Rainfall  Unlock2338
 Snowfall0  Unlock28
 Precipitation  Unlock81106
 Sunny262  Unlock205
 Avg. July High  Unlock7386
 Avg. Jan. Low41  Unlock22
 Comfort Index (higher=better)  Unlock8.47
 UV Index4.9  Unlock4.3
 Elevation  Unlock3222443
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