Grundy Center, Iowa Weather
Warm wind sweeps the tallgrass. Day 16 of summer. Read this microseason across nine climate regions →
Grundy Center weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——83°66°—
- MondayJul 6Mostly Clear——83°67°0°
- TuesdayJul 7Overcast——82°64°-1°
- WednesdayJul 8Heavy Drizzle49%—82°66°0°
- ThursdayJul 9Thunderstorm62%—80°68°-2°
- FridayJul 10Light Drizzle26%—81°65°+1°
- SaturdayJul 11Overcast13%—82°65°+1°
AQI 39 (Good), driven by Ozone. AQI up 9 over the last 6 hours (gradual rise). Ozone at AQI 30 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 7.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 30 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 7.
- Present
- AQI 30
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 5.3 µg/m³ (AQI 29) with a 0.87 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.87
- 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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 11:52 PM
- Moonset
- 12:32 PM
- In sign
- ♓︎ Pisces
Warm wind sweeps the tallgrass
Grundy Center at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 30 (climatological average for this latitude)
- Microseason: Jul 6–10
- Planting window: Sow fall broccoli and cabbage indoors for transplant in 4 weeks.
ZIP code: 50638
16-Day Forecast — Grundy Center
- Sun83°66°7%
- Mon83°67°1%
- Tue82°64°1%
- Wed82°66°49%
- Thu80°68°62%
- Fri81°65°26%
- Sat82°65°13%
- Sun85°68°4%
- Mon91°68°4%
- Tue79°65°5%
- Wed78°61°11%
- Thu77°62°23%
- Fri68°66°24%
- Sat77°62°23%
- Sun80°62°26%
- Mon77°65°23%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 6, 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 — Grundy Center
SPC includes Grundy Center in the general thunderstorm area day after tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- 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 Grundy Center
- 50638