Grantsville, Maryland Weather
Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →
Grantsville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Drizzle20%0.06″65°54°—
- TuesdayJun 16Overcast——68°48°+3°
- WednesdayJun 17Light Drizzle——75°55°+7°
- ThursdayJun 18T-storm w/ Hail74%0.41″76°62°+1°
- FridayJun 19Drizzle57%0.04″70°53°-6°
- SaturdayJun 20Overcast——68°48°-2°
- SundayJun 21Heavy Drizzle25%0.14″61°51°-7°
AQI 35 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 32 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 5 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 32 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 5 around 1 PM.
- Present
- AQI 32
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 4.9 µg/m³, PM10 at 5.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.96
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 9:01 PM
- In sign
- ♊︎ Gemini
Solstice approaches — longest light
Grantsville at a glance
- Today vs. normal: 21°F below the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Grantsville
- Mon65°54°20%
- Tue68°48°1%
- Wed75°55°7%
- Thu76°62°74%
- Fri70°53°57%
- Sat68°48°6%
- Sun61°51°25%
- Mon72°54°43%
- Tue74°49°40%
- Wed77°52°24%
- Thu77°60°30%
- Fri79°59°35%
- Sat80°55°23%
- Sun77°58°39%
- Mon90°68°32%
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 — Grantsville
SPC has placed Grantsville in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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 Grantsville
- 21536