Greencastle, Missouri 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 4Overcast34%—85°69°—
- SundayJul 5Heavy Showers15%0.49″86°70°+1°
- MondayJul 6Light Drizzle——82°66°-4°
- TuesdayJul 7Partly Cloudy——84°63°+2°
- WednesdayJul 8Overcast10%—87°64°+3°
- ThursdayJul 9Thunderstorm32%—84°72°-3°
- FridayJul 10Light Showers32%0.02″82°67°-2°
AQI 29 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 43 now. With UV 6.6 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 27 around 1 PM.
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 43 now. With UV 6.6 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 27 around 1 PM.
- Present
- AQI 43
- UV peak
- 6.6 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 27
PM × Wind × Precip
PM2.5 at 6.5 µg/m³ (AQI 36) with a 0.77 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.77
- 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
- 11:06 PM
- Moonset
- 10:17 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Greencastle at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Greencastle
- Sat85°69°34%
- Sun86°70°15%
- Mon82°66°3%
- Tue84°63°1%
- Wed87°64°10%
- Thu84°72°32%
- Fri82°67°32%
- Sat75°61°10%
- Sun77°59°6%
- Mon79°58°6%
- Tue79°58°8%
- Wed82°57°13%
- Thu84°64°14%
- Fri81°70°13%
- Sat83°67°10%
- Sun76°60°12%
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 includes Greencastle in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- 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 Greencastle
- 63544