2025 Compare Cities Climate:
Herndon, VA vs Sunnyvale, CA

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Highlights
- Sunnyvale has 64.1% less rainy days than Herndon.
- Sunnyvale has 29.4% more Sunny Days than Herndon.
- On the BestPlaces comfort index, Sunnyvale scores 20.5% better than Herndon
 Herndon, VASunnyvale, CAUnited States
 Rainfall  Unlock1538
 Snowfall22  Unlock28
 Precipitation  Unlock63106
 Sunny201  Unlock205
 Avg. July High  Unlock8086
 Avg. Jan. Low24  Unlock22
 Comfort Index (higher=better)  Unlock8.87
 UV Index4  Unlock4.3
 Elevation  Unlock1252443
Reviews for Herndon    12 Reviews

Over 10 years ago

Seasons tend to be relatively mild. The warmer seasons are extended by 3-4 weeks as compared to the New York Metropolitan Area.  More

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Over 16 years ago

Traffic has gotten out of control the last couple of  More

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Over 16 years ago

We actually live south of Herndon in Oak Hill (Zip Code 20171). The Town of Herndon is incorporated, Oak Hill is not. Herndon is a nice enough city with an historic area  More

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Reviews for Sunnyvale    14 Reviews

At this point, I would only recommend moving to silicon valley for the job market. Sure, the weather is great and the restaurants offer huge variety. But the costs of  More

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Like previous reviewer, tech company's tyranny over city gov and quality of living has negatively impacted a fantastic place to live. Climate, while super, is grossly  More

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I've lived here for 40 years. While the weather is fabulous, For the past ten years of high density housing mostly needed to house thousands of a young up coming tech  More

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