Mount Morris, Illinois Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Mount Morris weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——86°56°—
- FridayJun 5Rain47%0.32″75°67°-11°
- SaturdayJun 6Light Showers50%—84°65°+9°
- SundayJun 7Showers18%—80°68°-4°
- MondayJun 8Showers63%0.01″81°68°+1°
- TuesdayJun 9Showers33%0.04″81°69°0°
- WednesdayJun 10Overcast21%—77°69°-4°
Ozone at AQI 51. AQI flat over the last 6 hours (within ±4 points). Overcast through the UV peak window (cloud cover ~74%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 51. Overcast through the UV peak window (cloud cover ~74%) — afternoon ozone should stay flat.
- Present
- AQI 51
- UV peak
- 8.1 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 27
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:34 AM
- Moonset
- 1:53 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Mount Morris at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 28 (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 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 — Mount Morris
SPC has placed Mount Morris in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- 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.