Norwalk, Iowa Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Norwalk weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Drizzle74%0.06″86°68°—
- SundayJul 5Overcast14%—84°67°-2°
- MondayJul 6Light Drizzle——82°66°-2°
- TuesdayJul 7Overcast——85°65°+3°
- WednesdayJul 8T-storm w/ Hail38%—88°66°+3°
- ThursdayJul 9Drizzle40%—82°68°-6°
- FridayJul 10Drizzle22%—82°67°0°
AQI 42 (Good), driven by Ozone. AQI up 8 over the last 6 hours (gradual rise). Ozone at AQI 49 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
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 49 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 49
- UV peak
- 1.1 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 49
PM × Wind × Precip
PM2.5 at 5.0 µg/m³, PM10 at 5.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- Wind
- light
- Recent rain
- 1h in last 6h
- Pattern
- background
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
- 11:12 PM
- Moonset
- 10:19 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Norwalk at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: April 25 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 50211
16-Day Forecast — Norwalk
- Sat86°68°74%
- Sun84°67°14%
- Mon82°66°1%
- Tue85°65°1%
- Wed88°66°38%
- Thu82°68°40%
- Fri82°67°22%
- Sat77°60°8%
- Sun79°59°8%
- Mon81°58°5%
- Tue82°61°6%
- Wed82°57°13%
- Thu87°65°17%
- Fri90°67°26%
- Sat80°63°27%
- Sun75°62°23%
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 — Norwalk
SPC includes Norwalk in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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 Norwalk
- 50211
- 50061