Marshalltown, Iowa Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Marshalltown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Showers73%0.76″85°67°—
- SundayJul 5Overcast10%—84°65°-1°
- MondayJul 6Mostly Clear——86°66°+2°
- TuesdayJul 7Overcast——83°66°-3°
- WednesdayJul 8T-storm w/ Hail34%—85°66°+2°
- ThursdayJul 9Heavy Drizzle44%—77°64°-8°
- FridayJul 10Light Drizzle11%—80°63°+3°
AQI 40 (Good), driven by Ozone. AQI up 10 over the last 6 hours (gradual rise).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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
- 11:31 PM
- Moonset
- 11:23 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Marshalltown at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 28 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 50158
16-Day Forecast — Marshalltown
- Sat85°67°73%
- Sun84°65°10%
- Mon86°66°2%
- Tue83°66°0%
- Wed85°66°34%
- Thu77°64°44%
- Fri80°63°11%
- Sat76°63°8%
- Sun75°58°8%
- Mon81°60°7%
- Tue87°68°7%
- Wed85°66°12%
- Thu88°68°18%
- Fri88°73°19%
- Sat89°73°17%
- Sun81°62°10%
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 — Marshalltown
SPC includes Marshalltown 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 Marshalltown
- 50158