Derby, Iowa Weather
Sun climbs to its northern throne. Day 88 of spring. Read this microseason across nine climate regions →
Derby weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——76°53°—
- TuesdayJun 16Overcast10%—75°59°-1°
- WednesdayJun 17T-storm w/ Hvy Hail62%—84°63°+9°
- ThursdayJun 18Overcast——72°54°-12°
- FridayJun 19Overcast——76°54°+4°
- SaturdayJun 20Light Drizzle32%0.01″73°61°-3°
- SundayJun 21Overcast52%—69°60°-4°
AQI 28 (Good), driven by Ozone. AQI down 6 over the last 6 hours (gradual decline). Ozone at AQI 39 now. With UV 6.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 32 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 39 now. With UV 6.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 32 around 1 PM.
- Present
- AQI 39
- UV peak
- 6.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 32
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:44 AM
- Moonset
- 9:05 PM
- In sign
- ♋︎ Cancer
Sun climbs to its northern throne
Derby at a glance
- Today vs. normal: 5°F below the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Derby
- Mon76°53°2%
- Tue75°59°10%
- Wed84°63°62%
- Thu72°54°4%
- Fri76°54°3%
- Sat73°61°32%
- Sun69°60°52%
- Mon73°57°33%
- Tue74°54°10%
- Wed75°57°14%
- Thu81°67°13%
- Fri88°71°33%
- Sat87°73°33%
- Sun84°62°22%
- Mon80°60°32%
- Tue78°64°36%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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 — Derby
SPC has placed Derby in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3SLGTSlight Risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Derby
- 50068