Unionville, Pennsylvania Weather
Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →
Unionville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——70°56°—
- TuesdayJun 16Overcast——75°52°+5°
- WednesdayJun 17Light Showers49%0.03″79°56°+4°
- ThursdayJun 18Heavy Showers86%0.82″82°58°+3°
- FridayJun 19Thunderstorm15%—72°55°-10°
- SaturdayJun 20Light Drizzle11%—73°50°+1°
- SundayJun 21Drizzle27%0.25″60°55°-13°
AQI 30 (Good), driven by PM2.5. AQI down 10 over the last 6 hours (gradual decline). PM2.5 at 8.1 µg/m³ (AQI 45) with a 0.96 fine-to-coarse ratio and 3 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.
What's driving it
PM × Wind × Precip
PM2.5 at 8.1 µg/m³ (AQI 45) with a 0.96 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.96
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:49 AM
- Moonset
- 9:09 PM
- In sign
- ♊︎ Gemini
Solstice approaches — longest light
Unionville at a glance
- Today vs. normal: 18°F below the seasonal normal for this latitude
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Unionville
- Mon70°56°3%
- Tue75°52°7%
- Wed79°56°49%
- Thu82°58°86%
- Fri72°55°15%
- Sat73°50°11%
- Sun60°55°27%
- Mon73°54°36%
- Tue73°49°33%
- Wed84°54°19%
- Thu84°59°21%
- Fri80°58°36%
- Sat81°55°40%
- Sun79°59°42%
- Mon95°72°35%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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 Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3MRGLMarginal Risk
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 Unionville
- 15066
- 15074