Walnut, Iowa Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Walnut weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle80%—82°70°—
- SundayJul 5Overcast17%—85°68°+3°
- MondayJul 6Overcast——84°67°-1°
- TuesdayJul 7Overcast——85°67°+1°
- WednesdayJul 8Thunderstorm42%—88°68°+3°
- ThursdayJul 9Drizzle42%—81°65°-7°
- FridayJul 10Partly Cloudy22%—84°65°+3°
AQI 42 (Good), driven by Ozone. AQI up 9 over the last 6 hours (gradual rise). Ozone at AQI 38 now. With UV 0.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 6 around 1 PM.
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 38 now. With UV 0.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 6 around 1 PM.
- Present
- AQI 38
- UV peak
- 0.1 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 6
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
- 11:33 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Walnut at a glance
- Today vs. normal: 9°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: 51577
16-Day Forecast — Walnut
- Sat82°70°80%
- Sun85°68°17%
- Mon84°67°1%
- Tue85°67°1%
- Wed88°68°42%
- Thu81°65°42%
- Fri84°65°22%
- Sat77°65°8%
- Sun79°60°6%
- Mon85°62°3%
- Tue89°67°6%
- Wed86°67°6%
- Thu91°73°16%
- Fri93°75°20%
- Sat93°74°20%
- Sun88°68°14%
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 — Walnut
SPC includes Walnut 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 Walnut
- 51577