Fountain Valley, CA vs South El Monte, CA
The cost of living difference between Fountain Valley, CA and South El Monte, CA is dramatic. South El Monte is 43.3% cheaper than Fountain Valley, a gap that translates to thousands of dollars per year in household expenses. Fountain Valley has a cost index of 200 while South El Monte sits at 139, making this one of the more striking comparisons on our site. Relocating between these cities would require a serious reassessment of budget and lifestyle expectations.
On the housing front, median rent in Fountain Valley is $2,507/month compared to $1,708/month in South El Monte — a 47% difference. Home values follow the same pattern: South El Monte is more affordable at $578,100 median vs $1,018,600.
Median household income in Fountain Valley is $111,797 compared to $67,153 in South El Monte (+66.5%). While Fountain Valley is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Fountain Valley spend roughly 26.9% of their income on rent, less than the 30.5% in South El Monte. The Fountain Valley ratio exceeds the commonly recommended 30% threshold, which can put pressure on household budgets.
Climate-wise, both cities share similar average temperatures (64.9°F vs 65.8°F). South El Monte receives more rainfall at 14.3" per year compared to 11.2" in Fountain Valley.
Income & Cost
Housing
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Rent by Bedroom Size
HUD Fair Market Rent (FY 2026) — metro area average
Everyday Prices
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Climate
NOAA 30-year normals (1991-2020)