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SeaTac, WA vs Sumner, WA

129
SeaTac
Washington
VS
-5.3%
136
Sumner
Washington

SeaTac is moderately more affordable than Sumner, with a 5.3% lower cost of living index. SeaTac scores 129 compared to 136 for Sumner, where the US average is 100. This difference means residents of Sumner can expect to pay noticeably more for everyday expenses, housing, and services.

On the housing front, median rent in SeaTac is $1,637/month compared to $1,886/month in Sumner — a 13% difference. Interestingly, home values tell a different story: while SeaTac has cheaper rent, Sumner actually has lower median home values ($478,500 vs $483,200).

Median household income in SeaTac is $76,517 compared to $98,376 in Sumner (-22.2%). While Sumner is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of SeaTac spend roughly 25.7% of their income on rent, more than the 23% in Sumner.

Climate-wise, both cities share similar average temperatures (53.7°F vs 53.7°F). Sumner receives more rainfall at 39.3" per year compared to 39.3" in SeaTac.

Income & Cost

Cost of Living Index
SeaTac
129
5% cheaper
Sumner
136
Median Household Income
SeaTac
$76,517
Sumner
$98,376
22% higher

Housing

Median Rent
SeaTac
$1,637
13% cheaper
Sumner
$1,886
Median Home Value
SeaTac
$483,200
Sumner
$478,500
1% cheaper
Population
SeaTac
31,143
Sumner
10,674

Salary Equivalency Calculator

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Everyday Prices

BLS Average Prices by metro area

Gasoline (regular)
SeaTac $3.31
Sumner $3.31
US $3.07
🥚
Eggs (grade A, large)
SeaTac $2.70
Sumner $2.70
US $2.50
🥛
Milk (whole)
SeaTac $4.35
Sumner $4.35
US $4.03
🍞
Bread (white)
SeaTac $2.00
Sumner $2.00
US $1.85
🍗
Chicken breast
SeaTac $4.48
Sumner $4.48
US $4.14
Electricity
SeaTac $0.16
Sumner $0.16
US $0.19

Climate

NOAA 30-year normals (1991-2020)

Avg Temp
SeaTac 53.7°F
Sumner 53.7°F
Summer High
SeaTac 77°F
Sumner 77°F
Winter Low
SeaTac 38°F
Sumner 38°F
Rainfall
SeaTac 39.3"
Sumner 39.3"
Rainy Days
SeaTac 156d
Sumner 156d