Arcanum, Ohio Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Arcanum weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Partly Cloudy27%—88°71°—
- SundayJul 5Light Drizzle34%0.01″85°71°-3°
- MondayJul 6Light Drizzle43%—81°67°-4°
- TuesdayJul 7Light Drizzle10%—78°62°-3°
- WednesdayJul 8Overcast——82°64°+4°
- ThursdayJul 9Thunderstorm43%—81°66°-1°
- FridayJul 10Thunderstorm54%—78°69°-3°
AQI 37 (Good), driven by Ozone. Ozone at AQI 78 now. With UV 6.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 70 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 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 78 now. With UV 6.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 70 around 1 PM.
- Present
- AQI 78
- UV peak
- 6.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 70
PM × Wind × Precip
PM2.5 at 12.0 µg/m³, PM10 at 14.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.82
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 11:33 PM
- Moonset
- 10:43 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Arcanum at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 45304
16-Day Forecast — Arcanum
- Sat88°71°27%
- Sun85°71°34%
- Mon81°67°43%
- Tue78°62°10%
- Wed82°64°8%
- Thu81°66°43%
- Fri78°69°54%
- Sat83°66°32%
- Sun73°60°12%
- Mon70°60°10%
- Tue73°59°16%
- Wed81°62°35%
- Thu83°66°23%
- Fri81°68°20%
- Sat84°67°35%
- Sun86°69°32%
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 — Arcanum
SPC has placed Arcanum 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 Arcanum
- 45304