Waterloo, Indiana Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Waterloo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Rain51%0.13″86°71°—
- SundayJul 5Showers30%0.11″78°70°-8°
- MondayJul 6Overcast18%—80°66°+2°
- TuesdayJul 7Overcast——83°60°+3°
- WednesdayJul 8Overcast——84°63°+1°
- ThursdayJul 9Thunderstorm45%—81°65°-3°
- FridayJul 10Light Drizzle44%—78°67°-3°
AQI 36 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 47 now. With UV 3.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 14 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 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 47 now. With UV 3.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 14 around 1 PM.
- Present
- AQI 47
- UV peak
- 3.1 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 14
PM × Wind × Precip
PM2.5 at 6.3 µg/m³ (AQI 35) with a 0.93 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:37 PM
- Moonset
- 10:44 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Waterloo at a glance
- Today vs. normal: 10°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: 46793
16-Day Forecast — Waterloo
- Sat86°71°51%
- Sun78°70°30%
- Mon80°66°18%
- Tue83°60°4%
- Wed84°63°3%
- Thu81°65°45%
- Fri78°67°44%
- Sat82°63°20%
- Sun71°62°12%
- Mon70°60°12%
- Tue75°59°12%
- Wed82°62°29%
- Thu83°66°32%
- Fri79°69°26%
- Sat84°67°23%
- Sun86°68°33%
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 — Waterloo
SPC has placed Waterloo in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Waterloo
- 46793