Dermidia

Compare dry-skin seasons in two cities

See how indoor drying stress differs between two places across a typical year, using the Dry Skin Index for each area.

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Boston has about 262 more dry-stress days a year than Miami, including about 85 more Enhanced Care days.

Boston, MA

Worst months reach Enhanced Care

Annual average DSI
5.1
Worst month
January (6.7)
Dry-stress days a year (DSI 4+)
306
Enhanced Care days a year (DSI 6+)
85
Dry season
August–June
Humidifier months
December–February

Month by month

Average monthly Dry Skin Index for Boston across the reference year, on a 0–10 scale colored by Dermidia care tier.
Low RiskFirst AlertSpecial CareEnhanced Care
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Miami, FL

Worst months reach First Alert

Annual average DSI
3.6
Worst month
January (4.0)
Dry-stress days a year (DSI 4+)
44
Enhanced Care days a year (DSI 6+)
0
Dry season
January–January
Humidifier months
None

Month by month

Average monthly Dry Skin Index for Miami across the reference year, on a 0–10 scale colored by Dermidia care tier.
Low RiskFirst AlertSpecial CareEnhanced Care

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Values are modeled estimates of typical indoor drying stress for each metro area, simulated from 2025 local climatic data. They are not measurements of individual homes. Dry-stress days are days with a modeled Dry Skin Index of 4 or higher; Enhanced Care days are 6 or higher.