Climate & Weather in Miami
Miami has a subtropical climate with hot, humid, wet summers and short, mild winters -- and a rising-baseline complication that distinguishes it from most U.S. cities: measurable sea-level rise is already producing more nuisance flooding on sunny days, separate from any storm.
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Learn moreTemperature
Miami's annual average high runs around 83°F with an average low around 70°F. The hottest stretch is typically July-August, with daily highs around 91°F and nighttime lows around 78°F; the coolest is typically mid-January, with highs around 76°F and lows around 61°F. Freezing temperatures are essentially unheard of.
Rainfall
Sources give somewhat different annual rainfall totals -- one cites about 61.9 inches per year, another about 67.41 inches -- likely reflecting different measurement periods or station data, but both agree the bulk of it falls during the official rainy season, May 15 through October 15. September is typically the wettest month, with average rainfall approaching 9.9 inches.
Humidity
Average relative humidity in Miami runs around 74%, contributing to the area's characteristic year-round mugginess even outside the hottest summer months.
Hurricane Season Overlaps the Rainy Season
Atlantic hurricane season (June 1-November 30) overlaps almost entirely with the rainy season, meaning the wettest and stormiest parts of the year are the same months. See flood-hurricane-risk for insurance and risk specifics tied to this period.
Sea-Level Rise and King Tide Flooding
NOAA measurements show sea levels around Miami have risen roughly 6 inches since 2000, with an additional 4-8 inches projected by 2030. This is already showing up in more frequent high-tide ("king tide") flooding -- typically occurring September through November -- that floods low-lying streets without any rain or storm involved. NOAA's Southeast regional data for the 2025-2026 meteorological year showed a median of about 7 high-tide flooding days, within a predicted range of 6-9 days; more broadly, the East and Gulf coasts now see roughly twice as many high-tide flooding days as they did in 2000. This is a distinct, slower-moving risk from hurricane-driven storm surge, and it is already measurable rather than purely projected.
Key takeaways
- Subtropical climate: annual average high ~83°F/low ~70°F, hottest in July-August (highs ~91°F), mildest in mid-January (highs ~76°F).
- Rainy season runs May 15-October 15 and overlaps almost entirely with hurricane season (June 1-Nov 30); annual rainfall estimates range roughly 62-67 inches depending on source.
- NOAA measures roughly 6 inches of sea-level rise around Miami since 2000, with 4-8 more inches projected by 2030 -- already producing more frequent king-tide street flooding, distinct from storm-driven flooding.
- High-tide flooding days have roughly doubled across the East and Gulf coasts since 2000, per NOAA's Southeast regional tracking.
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