Greencastle, Indiana Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Greencastle weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Showers37%0.35″89°72°—
- SundayJul 5Rain34%0.25″82°71°-7°
- MondayJul 6Overcast34%—83°67°+1°
- TuesdayJul 7Overcast——81°64°-2°
- WednesdayJul 8Partly Cloudy16%—82°64°+1°
- ThursdayJul 9Thunderstorm41%—84°67°+2°
- FridayJul 10Light Drizzle44%—78°69°-6°
AQI 35 (Good), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 8.0 µg/m³ (AQI 44) with a 0.85 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 33 now. With UV 2.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 11 around 1 PM.
- Present
- AQI 33
- UV peak
- 2.6 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 11
PM × Wind × Precip
PM2.5 at 8.0 µg/m³ (AQI 44) with a 0.85 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.85
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:42 PM
- Moonset
- 10:53 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Greencastle at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 46135
16-Day Forecast — Greencastle
- Sat89°73°37%
- Sun82°71°34%
- Mon83°67°34%
- Tue81°64°8%
- Wed82°64°16%
- Thu84°67°41%
- Fri78°69°44%
- Sat81°67°26%
- Sun73°60°10%
- Mon72°58°8%
- Tue75°58°10%
- Wed82°62°16%
- Thu83°65°29%
- Fri81°69°32%
- Sat84°68°26%
- Sun85°71°45%
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 — Greencastle
SPC has placed Greencastle in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Greencastle
- 46135