Hannibal, Ohio Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Hannibal weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast37%—97°73°—
- SundayJul 5Overcast72%—93°72°-4°
- MondayJul 6T-storm w/ Hail74%—89°69°-4°
- TuesdayJul 7Overcast27%—83°64°-6°
- WednesdayJul 8Light Drizzle17%—92°62°+9°
- ThursdayJul 9Overcast51%—92°69°0°
- FridayJul 10T-storm w/ Hail54%0.02″79°67°-13°
AQI 59 (Moderate), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 60 now. With UV 6.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 50 around 1 PM.
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 60 now. With UV 6.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 50 around 1 PM.
- Present
- AQI 60
- UV peak
- 6.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 50
PM × Wind × Precip
PM2.5 at 6.9 µg/m³ (AQI 38) with a 0.97 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.97
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:17 PM
- Moonset
- 10:28 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Hannibal at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 43931
16-Day Forecast — Hannibal
- Sat97°73°37%
- Sun93°72°72%
- Mon89°69°74%
- Tue83°64°27%
- Wed92°62°17%
- Thu92°69°51%
- Fri79°67°54%
- Sat91°69°44%
- Sun78°63°27%
- Mon78°58°15%
- Tue84°58°17%
- Wed89°64°23%
- Thu94°68°26%
- Fri94°70°20%
- Sat83°71°26%
- Sun90°68°26%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Hannibal
SPC has placed Hannibal in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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.
ZIP codes in Hannibal
- 43946
- 43915
- 43931