San Francisco dry-skin forecast
San Francisco experiences modeled dry-stress conditions throughout the year, with skin stress peaking in January.
Dry-skin season, month by month
Average modeled Dry Skin Index for San Francisco using 2025 local climatic data, colored by Dermidia care tier.
San Francisco has no off-season for skin
Even San Francisco's mildest month (September, index 4.1) stays above the dry-stress threshold. It's one of the metros where skin faces drying conditions all 12 months — 0 of those days reach Enhanced Care.
What tends to help in San Francisco
Choose a fragrance-free leave-on moisturizer. A lotion may be enough when dryness is mild; use a cream if skin already feels rough or tight.
- Moisturizer
- Choose a fragrance-free leave-on moisturizer. A lotion may be enough when dryness is mild; use a cream if skin already feels rough or tight.
- Room air
- Humidifier use is generally optional below DSI 6 unless your room feels very dry.
If you have eczema, diabetes, poor circulation, immune suppression, open cracks, bleeding, signs of infection, or persistent itching, follow your clinician's plan and seek medical advice.
Common questions
- When is dry-skin season worst in San Francisco?
- San Francisco stays in dry-stress conditions all year, peaking in January.
- Do you need a humidifier in San Francisco?
- A humidifier may not be necessary for typical conditions in San Francisco. Start with moisturizer and consider indoor humidity if your skin still feels dry.
- How many dry-stress days does San Francisco typically have?
- San Francisco has about 363 modeled dry-stress days per year, including approximately 0 days in the Enhanced Care range.
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