Hannibal, Ohio Weather
Fireflies rise from the lawn. Day 76 of spring. Read this microseason across nine climate regions →
Hannibal weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——79°50°—
- ThursdayJun 4Overcast——82°58°+3°
- FridayJun 5Overcast——86°60°+4°
- SaturdayJun 6Drizzle76%—86°61°0°
- SundayJun 7Light Showers76%0.02″80°64°-6°
- MondayJun 8Overcast——89°59°+9°
- TuesdayJun 9Overcast11%—88°60°-1°
Ozone at AQI 500 now. AQI up 45 in the last 6 hours — air quality is degrading. With UV 0.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 120 by mid-afternoon.
AVOID OUTDOORS Avoid outdoor exertion. Keep windows closed; use HEPA filtration indoors if available.
What's driving it
Ozone × UV × Sky
Ozone at AQI 500 now. With UV 0.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 120 by mid-afternoon.
- Present
- AQI 500
- UV peak
- 0.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 120
PM × Wind × Precip
PM2.5 at 4.6 µg/m³ (AQI 26) with a 0.92 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.92
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:13 AM
- Moonset
- 12:21 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Hannibal at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: April 14 (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 3, 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.