Unionville, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Unionville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast29%—99°76°—
- SundayJul 5Heavy Rain88%0.40″95°71°-4°
- MondayJul 6Thunderstorm88%0.46″77°64°-18°
- TuesdayJul 7Light Drizzle73%0.01″68°58°-9°
- WednesdayJul 8Clear14%—82°55°+14°
- ThursdayJul 9Light Drizzle26%—89°63°+7°
- FridayJul 10Drizzle32%—90°68°+1°
AQI 57 (Moderate), driven by PM2.5. AQI up 6 over the last 6 hours (gradual rise). PM2.5 at 14.4 µg/m³ (AQI 61) with a 0.91 fine-to-coarse ratio and 6 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 6 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 46 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 29 around 1 PM.
- Present
- AQI 46
- UV peak
- 4.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 29
PM × Wind × Precip
PM2.5 at 14.4 µg/m³ (AQI 61) with a 0.91 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- 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
- 10:56 PM
- Moonset
- 10:06 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Unionville at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Unionville
- Sat99°76°29%
- Sun95°71°88%
- Mon77°64°88%
- Tue68°58°73%
- Wed82°55°14%
- Thu89°63°26%
- Fri90°68°32%
- Sat82°70°31%
- Sun72°65°32%
- Mon71°64°13%
- Tue81°62°15%
- Wed88°66°24%
- Thu91°71°23%
- Fri92°73°34%
- Sat78°69°39%
- Sun85°68°35%
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 — Unionville
SPC has placed Unionville in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight Risk
- 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 Unionville
- 19348
- 19375