Heron Lake, Minnesota Weather
Toward the solstice glow. Day 86 of spring. Read this microseason across nine climate regions →
Heron Lake weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 13Light Drizzle50%—76°58°—
- SundayJun 14Overcast——71°52°-5°
- MondayJun 15Drizzle16%0.05″74°52°+3°
- TuesdayJun 16Light Rain16%0.10″78°52°+4°
- WednesdayJun 17Light Drizzle46%0.03″63°51°-15°
- ThursdayJun 18Overcast21%—69°50°+6°
- FridayJun 19Overcast19%—77°49°+8°
AQI 33 (Good), driven by PM2.5. AQI down 8 over the last 6 hours (gradual decline). PM2.5 at 7.9 µg/m³ (AQI 44) with a 0.91 fine-to-coarse ratio and 4 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 7.9 µg/m³ (AQI 44) with a 0.91 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- 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).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 3:49 AM
- Moonset
- —
- In sign
- ♉︎ Taurus
Toward the solstice glow
Heron Lake at a glance
- Today vs. normal: 11°F below the seasonal normal for this latitude
- Last frost: May 9 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Prune spring-blooming shrubs after flowers fade.
15-Day Forecast — Heron Lake
- Sat76°59°50%
- Sun71°52°1%
- Mon74°52°16%
- Tue78°52°16%
- Wed63°51°46%
- Thu69°50°21%
- Fri77°49°19%
- Sat77°59°31%
- Sun73°54°31%
- Mon74°52°20%
- Tue64°58°20%
- Wed83°62°35%
- Thu80°60°24%
- Fri73°54°23%
- Sat76°55°29%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 13, 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 — Heron Lake
SPC has placed Heron Lake in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 Heron Lake
- 56137