Diagonal, Iowa Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Diagonal weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle72%0.04″82°68°—
- SundayJul 5Overcast——85°67°+3°
- MondayJul 6Light Drizzle——83°66°-2°
- TuesdayJul 7Overcast——84°65°+1°
- WednesdayJul 8Heavy Drizzle14%—88°66°+4°
- ThursdayJul 9Showers46%0.02″82°69°-6°
- FridayJul 10Heavy Drizzle29%0.09″81°67°-1°
AQI 32 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM scrubbed by 2 hours of recent rain — PM2.5 down to 7.9 µg/m³, PM10 to 11.1 µg/m³.
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 40. Overcast through the UV peak window (cloud cover ~91%) — afternoon ozone should stay flat.
- Present
- AQI 40
- UV peak
- 2.2 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 7.9 µg/m³, PM10 to 11.1 µg/m³.
- PM2.5/PM10
- 0.71
- Wind
- calm
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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
- 11:13 PM
- Moonset
- 10:23 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Diagonal at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 21 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 50845
16-Day Forecast — Diagonal
- Sat84°68°72%
- Sun85°68°9%
- Mon83°66°3%
- Tue84°65°1%
- Wed88°66°14%
- Thu82°69°46%
- Fri81°67°29%
- Sat76°59°9%
- Sun77°59°6%
- Mon79°59°5%
- Tue80°60°5%
- Wed82°57°12%
- Thu85°64°19%
- Fri86°68°13%
- Sat77°63°17%
- Sun75°60°17%
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 — Diagonal
SPC includes Diagonal 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 Diagonal
- 50845