Dennison, Minnesota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Dennison weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast22%—86°66°—
- SundayJul 5Light Drizzle17%0.03″85°66°-1°
- MondayJul 6Overcast——84°64°-1°
- TuesdayJul 7T-storm w/ Hail11%—87°69°+3°
- WednesdayJul 8Light Showers40%0.02″74°61°-13°
- ThursdayJul 9Overcast40%—78°58°+4°
- FridayJul 10Showers16%0.16″78°59°0°
AQI 26 (Good), driven by PM2.5. AQI down 15 over the last 6 hours — air quality is improving sharply. PM2.5 at 5.2 µg/m³ (AQI 29) with a 0.81 fine-to-coarse ratio and 2 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
PM × Wind × Precip
PM2.5 at 5.2 µg/m³ (AQI 29) with a 0.81 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.81
- Wind
- calm
- 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
- 11:14 PM
- Moonset
- 10:13 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Dennison at a glance
- Today vs. normal: 67°F — typical for the season
- Last frost: May 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 55018
15-Day Forecast — Dennison
- Sat86°65°22%
- Sun85°66°17%
- Mon84°64°4%
- Tue87°69°11%
- Wed74°61°40%
- Thu78°58°40%
- Fri78°59°16%
- Sat79°61°16%
- Sun79°57°9%
- Mon74°64°12%
- Tue74°58°8%
- Wed81°59°15%
- Thu78°66°35%
- Fri81°66°23%
- Sat82°59°18%
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 — Dennison
SPC has placed Dennison 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 Dennison
- 55018