Ontario, Indiana Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Ontario weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain60%2.3″84°69°—
- SundayJul 5Light Drizzle62%0.03″82°70°-2°
- MondayJul 6Light Drizzle25%0.01″77°61°-5°
- TuesdayJul 7Mostly Clear——80°59°+3°
- WednesdayJul 8Overcast10%—81°62°+1°
- ThursdayJul 9Drizzle25%0.07″72°64°-9°
- FridayJul 10Overcast26%—79°60°+7°
AQI 34 (Good), driven by PM2.5. AQI down 8 over the last 6 hours (gradual decline). PM2.5 at 6.1 µg/m³ (AQI 34) with a 0.95 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
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 34 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 6 around 1 PM.
- Present
- AQI 34
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 6.1 µg/m³ (AQI 34) with a 0.95 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- 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
- 11:39 PM
- Moonset
- 10:45 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Ontario at a glance
- Today vs. normal: 69°F — typical for the season
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Ontario
- Sat84°69°60%
- Sun82°70°62%
- Mon77°61°25%
- Tue80°59°4%
- Wed81°62°10%
- Thu72°64°25%
- Fri79°60°26%
- Sat81°61°23%
- Sun74°62°10%
- Mon86°62°8%
- Tue70°60°13%
- Wed77°57°19%
- Thu79°58°45%
- Fri76°65°32%
- Sat74°62°21%
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 — Ontario
SPC has placed Ontario 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 Ontario
- 46746
- 46761