Lewis, Iowa Weather
Warm wind sweeps the tallgrass. Day 16 of summer. Read this microseason across nine climate regions →
Lewis weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 6Overcast——88°65°—
- TuesdayJul 7Overcast——90°69°+2°
- WednesdayJul 8Overcast46%—87°68°-3°
- ThursdayJul 9Thunderstorm68%—86°68°-1°
- FridayJul 10Thunderstorm32%0.01″82°70°-4°
- SaturdayJul 11Mostly Clear14%—87°66°+5°
- SundayJul 12Overcast——91°69°+4°
AQI 30 (Good), driven by PM2.5. AQI up 12 over the last 6 hours (gradual rise). PM2.5 at 8.9 µg/m³ (AQI 49) with a 0.81 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant air, not road dust.
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 46 now. With UV 8.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 50.
- Present
- AQI 46
- UV peak
- 8.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 50
PM × Wind × Precip
PM2.5 at 8.9 µg/m³ (AQI 49) with a 0.81 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.81
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 12:01 AM
- Moonset
- 12:42 PM
- In sign
- ♈︎ Aries
Warm wind sweeps the tallgrass
Lewis at a glance
- Today vs. normal: 17°F above the seasonal normal for this latitude
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jul 6–10
- Planting window: Sow fall broccoli and cabbage indoors for transplant in 4 weeks.
ZIP code: 51544
16-Day Forecast — Lewis
- Mon88°65°0%
- Tue90°69°0%
- Wed87°68°46%
- Thu86°68°68%
- Fri82°70°32%
- Sat87°66°14%
- Sun91°69°7%
- Mon98°71°3%
- Tue101°72°2%
- Wed88°65°9%
- Thu72°59°10%
- Fri78°58°19%
- Sat81°58°16%
- Sun83°59°20%
- Mon85°61°21%
- Tue87°67°23%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 6, 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 — Lewis
SPC includes Lewis in the general thunderstorm area day after tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
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 Lewis
- 51544