La Harpe, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
La Harpe weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast27%—85°70°—
- SundayJul 5Drizzle23%0.03″85°69°0°
- MondayJul 6Light Drizzle——82°65°-3°
- TuesdayJul 7Clear——81°63°-1°
- WednesdayJul 8Overcast10%—86°64°+5°
- ThursdayJul 9Thunderstorm25%—84°71°-2°
- FridayJul 10Overcast23%—82°69°-2°
AQI 26 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.88 fine-to-coarse ratio and 5 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 during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 33. Overcast through the UV peak window (cloud cover ~73%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 3.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.88 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.88
- Wind
- light
- 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
- 10:59 PM
- Moonset
- 10:09 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
La Harpe at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61450
16-Day Forecast — La Harpe
- Sat85°70°27%
- Sun85°69°23%
- Mon82°65°4%
- Tue81°63°5%
- Wed86°64°10%
- Thu84°71°25%
- Fri82°69°23%
- Sat84°68°20%
- Sun70°58°9%
- Mon75°56°7%
- Tue76°60°7%
- Wed80°65°16%
- Thu81°65°16%
- Fri82°68°19%
- Sat85°70°13%
- Sun84°72°13%
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 — La Harpe
SPC has placed La Harpe 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 La Harpe
- 61450