Riva, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Riva weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Showers41%0.09″102°79°—
- SundayJul 5Heavy Drizzle44%0.08″95°76°-7°
- MondayJul 6Light Drizzle75%—85°74°-10°
- TuesdayJul 7Thunderstorm75%0.13″88°70°+3°
- WednesdayJul 8Light Showers38%0.58″80°70°-8°
- ThursdayJul 9Overcast11%—93°67°+13°
- FridayJul 10Light Drizzle39%0.02″96°71°+3°
AQI 168 (Unhealthy), driven by Ozone. AQI up 110 in the last 6 hours — air quality is degrading. Ozone at AQI 122. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
LIMIT OUTDOORS Limit prolonged outdoor exertion. Sensitive groups should avoid outdoor exertion. Consider rescheduling outdoor activities until AQI improves.
What's driving it
Ozone × UV × Sky
Ozone at AQI 122. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
- Present
- AQI 122
- UV peak
- 0.1 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 15
PM × Wind × Precip
PM2.5 at 10.5 µg/m³, PM10 at 11.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.93
- Wind
- light
- Recent rain
- 1h 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:58 PM
- Moonset
- 10:11 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Riva at a glance
- Today vs. normal: 20°F above the seasonal normal for this latitude
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 21140
16-Day Forecast — Riva
- Sat102°79°41%
- Sun95°76°44%
- Mon85°74°75%
- Tue88°70°75%
- Wed80°70°38%
- Thu93°67°11%
- Fri96°71°39%
- Sat94°69°34%
- Sun83°68°21%
- Mon80°68°18%
- Tue89°66°18%
- Wed93°68°40%
- Thu94°69°42%
- Fri94°72°35%
- Sat95°70°35%
- Sun94°70°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 — Riva
SPC has placed Riva in the Enhanced Risk category for severe thunderstorms today.
- TODAYENHEnhanced Risk
- TOMORROWSLGTSlight Risk
- DAY 3TSTMGeneral Thunderstorms
Numerous severe storms likely. Tornadoes, large hail, and damaging wind gusts possible across the area. Track NWS warnings if storms develop.
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 Riva
- 21035
- 21037
- 21140