Key West, Florida Weather
First trades stir the ceiba canopy. Day 77 of spring. Read this microseason across nine climate regions →
Key West weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Showers57%0.61″84°75°—
- FridayJun 5Heavy Showers30%1.6″86°75°+2°
- SaturdayJun 6Drizzle42%—83°77°-3°
- SundayJun 7Light Showers20%—83°82°0°
- MondayJun 8Light Showers35%—84°82°+1°
- TuesdayJun 9Overcast38%—84°83°0°
- WednesdayJun 10Drizzle64%0.02″83°78°-1°
Ozone at AQI 39. AQI flat over the last 6 hours (within ±3 points). Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 39. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 39
- UV peak
- 5.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 15
PM × Wind × Precip
PM2.5/PM10 ratio 0.68 with 11 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.68
- Wind
- breezy
- Recent rain
- 1h in last 6h
- Pattern
- transport
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:13 AM
- Moonset
- 2:06 PM
- In sign
- ♒︎ Aquarius
First trades stir the ceiba canopy
Key West at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: January 13 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Key West
SPC has placed Key West in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.