Dennison, Ohio Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Dennison weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain29%0.37″94°69°—
- SundayJul 5Rain73%0.41″87°69°-7°
- MondayJul 6T-storm w/ Hail66%—82°66°-5°
- TuesdayJul 7Overcast23%—85°64°+3°
- WednesdayJul 8Overcast10%—90°61°+5°
- ThursdayJul 9Light Drizzle49%—88°66°-2°
- FridayJul 10Heavy Drizzle50%—80°68°-8°
AQI 34 (Good), driven by Ozone. AQI down 15 over the last 6 hours — air quality is improving sharply. Ozone at AQI 41. Overcast through the UV peak window (cloud cover ~77%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 6 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 41. Overcast through the UV peak window (cloud cover ~77%) — afternoon ozone should stay flat.
- Present
- AQI 41
- UV peak
- 3.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
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
- 11:20 PM
- Moonset
- 10:29 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Dennison at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 44621
16-Day Forecast — Dennison
- Sat94°69°29%
- Sun87°69°73%
- Mon82°66°66%
- Tue85°64°23%
- Wed90°61°10%
- Thu88°66°49%
- Fri80°68°50%
- Sat88°66°40%
- Sun78°62°28%
- Mon72°56°13%
- Tue79°60°15%
- Wed88°65°30%
- Thu92°67°39%
- Fri91°68°49%
- Sat87°67°32%
- Sun88°67°41%
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 — Dennison
SPC has placed Dennison in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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 Dennison
- 44621