Harlan, Iowa Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Harlan weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——88°67°—
- MondayJul 6Overcast——89°70°+1°
- TuesdayJul 7Overcast——85°68°-4°
- WednesdayJul 8Overcast47%—89°70°+4°
- ThursdayJul 9Overcast47%—80°66°-9°
- FridayJul 10Overcast18%—80°64°0°
- SaturdayJul 11Drizzle—0.09″83°66°+3°
AQI 31 (Good), driven by PM2.5. AQI down 10 over the last 6 hours (gradual decline). PM2.5 at 4.6 µg/m³ (AQI 26) with a 0.85 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.
What's driving it
PM × Wind × Precip
PM2.5 at 4.6 µg/m³ (AQI 26) with a 0.85 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.85
- 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
- 11:41 PM
- Moonset
- 11:34 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Harlan at a glance
- Today vs. normal: 68°F — typical for the season
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 51537
15-Day Forecast — Harlan
- Sun88°67°8%
- Mon89°70°1%
- Tue85°68°4%
- Wed89°70°47%
- Thu80°66°47%
- Fri80°64°18%
- Sat83°66°7%
- Sun87°69°6%
- Mon88°69°4%
- Tue92°72°1%
- Wed89°67°7%
- Thu89°66°13%
- Fri87°68°16%
- Sat87°66°16%
- Sun93°72°16%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Harlan
SPC includes Harlan in the general thunderstorm area today — no severe risk, but storms are possible.
- 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 Harlan
- 51537
- 51593