Mechanicsville, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Mechanicsville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain34%0.15″96°72°—
- SundayJul 5Heavy Rain95%0.80″89°71°-7°
- MondayJul 6Thunderstorm95%0.32″74°62°-15°
- TuesdayJul 7Light Drizzle61%0.01″73°57°-1°
- WednesdayJul 8Mostly Clear19%—83°55°+10°
- ThursdayJul 9Light Drizzle37%—85°60°+2°
- FridayJul 10Light Drizzle37%—83°66°-2°
AQI 56 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.8 µg/m³ (AQI 54) with a 0.94 fine-to-coarse ratio and 5 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
Ozone × UV × Sky
Ozone at AQI 39 now. With UV 1.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 9 around 1 PM.
- Present
- AQI 39
- UV peak
- 1.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 9
PM × Wind × Precip
PM2.5 at 10.8 µg/m³ (AQI 54) with a 0.94 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- 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
- 10:59 PM
- Moonset
- 10:07 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Mechanicsville at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Mechanicsville
- Sat96°72°34%
- Sun89°71°95%
- Mon74°62°95%
- Tue73°57°61%
- Wed83°55°19%
- Thu85°60°37%
- Fri83°66°37%
- Sat82°68°28%
- Sun71°64°28%
- Mon69°63°18%
- Tue80°61°19%
- Wed83°62°30%
- Thu92°68°29%
- Fri91°71°36%
- Sat81°69°36%
- Sun87°65°39%
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 — Mechanicsville
SPC has placed Mechanicsville in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal 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 Mechanicsville
- 17901