Ottawa, Ohio Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
Ottawa weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——86°54°—
- FridayJun 5Overcast——88°62°+2°
- SaturdayJun 6Light Showers74%0.42″82°66°-6°
- SundayJun 7Light Drizzle47%—81°65°-1°
- MondayJun 8Light Showers18%—82°62°+1°
- TuesdayJun 9Light Drizzle35%0.03″75°69°-7°
- WednesdayJun 10Light Drizzle23%—83°70°+8°
Ozone at AQI 76 now. AQI up 56 in the last 6 hours — air quality is degrading. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 13 by mid-afternoon.
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 76 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 13 by mid-afternoon.
- Present
- AQI 76
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 13
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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:39 AM
- Moonset
- 2:40 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Ottawa at a glance
- Today vs. normal: 76°F — typical for the season
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 5, 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 — Ottawa
SPC has placed Ottawa in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3SLGTSlight Risk
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.