Helena, Ohio Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Helena weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast22%—88°70°—
- SundayJul 5Light Drizzle34%0.03″81°70°-7°
- MondayJul 6Light Drizzle30%—77°68°-4°
- TuesdayJul 7Light Drizzle——79°66°+2°
- WednesdayJul 8Overcast——85°63°+6°
- ThursdayJul 9Thunderstorm35%—81°66°-4°
- FridayJul 10Light Drizzle32%—79°70°-2°
AQI 34 (Good), driven by Ozone. AQI down 8 over the last 6 hours (gradual decline). Ozone at AQI 51 now. With UV 4.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 34 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 51 now. With UV 4.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 34 around 1 PM.
- Present
- AQI 51
- UV peak
- 4.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 34
PM × Wind × Precip
PM2.5 at 8.2 µg/m³ (AQI 46) with a 0.91 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- 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
- 11:29 PM
- Moonset
- 10:36 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Helena at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 43435
16-Day Forecast — Helena
- Sat88°70°22%
- Sun81°70°34%
- Mon77°68°30%
- Tue79°66°9%
- Wed85°63°8%
- Thu81°66°35%
- Fri79°70°32%
- Sat83°67°24%
- Sun77°62°19%
- Mon63°61°10%
- Tue76°59°16%
- Wed84°64°26%
- Thu85°67°25%
- Fri86°69°15%
- Sat86°68°23%
- Sun87°67°23%
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 — Helena
SPC has placed Helena in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Helena
- 43435