Mechanicsville, Maryland Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Mechanicsville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain40%0.21″101°77°—
- SundayJul 5Light Drizzle25%0.02″98°74°-3°
- MondayJul 6Light Drizzle75%—89°74°-9°
- TuesdayJul 7Showers75%—80°72°-9°
- WednesdayJul 8Drizzle37%—82°69°+2°
- ThursdayJul 9Overcast13%—97°68°+15°
- FridayJul 10Light Drizzle34%0.04″100°72°+3°
AQI 85 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM scrubbed by 2 hours of recent rain — PM2.5 down to 10.1 µg/m³, PM10 to 10.7 µg/m³.
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 41 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 around 1 PM.
- Present
- AQI 41
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 7
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 10.1 µg/m³, PM10 to 10.7 µg/m³.
- PM2.5/PM10
- 0.94
- Wind
- breezy
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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
- 11:23 PM
- Moonset
- 11:17 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Mechanicsville at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: April 7 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 20659
16-Day Forecast — Mechanicsville
- Sat101°77°40%
- Sun98°74°25%
- Mon89°74°75%
- Tue80°72°75%
- Wed82°69°37%
- Thu97°68°13%
- Fri100°72°34%
- Sat82°70°39%
- Sun78°67°30%
- Mon85°61°24%
- Tue89°62°15%
- Wed93°66°41%
- Thu90°64°43%
- Fri91°68°43%
- Sat92°71°39%
- Sun92°69°37%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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
- TOMORROWSLGTSlight Risk
- DAY 3MRGLMarginal Risk
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
- 20659