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Monday
Today
High
Tuesday
Tomorrow
High
Wednesday
Jun 18
Moderate
Thursday
Jun 19
High
Friday
Jun 20
Extreme
Malaria
Zika
Dengue
Yellow Fever
Chikungunya
West Nile Fever
The most common mosquito-borne diseases in San Mateo are West Nile virus and occasionally St. Louis encephalitis, though cases are relatively rare.
To protect yourself, eliminate standing water, use insect repellent, wear protective clothing during dawn and dusk, and keep window screens intact.