Ottawa, Illinois Weather
Honeysuckle sweetens the night. Day 89 of spring. Read this microseason across nine climate regions →
Ottawa weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 16Thunderstorm49%0.11″76°60°—
- WednesdayJun 17Thunderstorm99%1.7″77°56°+1°
- ThursdayJun 18Light Drizzle33%0.01″70°58°-7°
- FridayJun 19Partly Cloudy——69°53°-1°
- SaturdayJun 20Drizzle11%0.02″72°55°+3°
- SundayJun 21Rain52%0.60″67°57°-5°
- MondayJun 22Overcast52%—70°54°+3°
AQI 24 (Good), driven by Ozone. AQI down 12 over the last 6 hours (gradual decline).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 6:34 AM
- Moonset
- 9:49 PM
- In sign
- ♋︎ Cancer
Honeysuckle sweetens the night
Ottawa at a glance
- Today vs. normal: 14°F below the seasonal normal for this latitude
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Ottawa
- Tue76°60°49%
- Wed77°56°99%
- Thu70°58°33%
- Fri69°53°3%
- Sat72°55°11%
- Sun67°57°52%
- Mon70°54°52%
- Tue75°51°11%
- Wed78°57°13%
- Thu81°64°17%
- Fri88°67°19%
- Sat91°75°39%
- Sun90°74°35%
- Mon90°74°38%
- Tue91°73°48%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 16, 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 Enhanced Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWENHEnhanced Risk
- DAY 3NONENo severe risk
Numerous severe storms likely. Tornadoes, large hail, and damaging wind gusts possible across the area. Track NWS warnings if storms develop.
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 Ottawa
- 61350