Hillsboro, Maryland Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Hillsboro weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Drizzle28%0.05″100°78°—
- SundayJul 5Overcast27%—97°76°-3°
- MondayJul 6T-storm w/ Hail74%—89°72°-8°
- TuesdayJul 7Drizzle70%—78°71°-11°
- WednesdayJul 8Overcast35%—82°68°+4°
- ThursdayJul 9Overcast——93°66°+11°
- FridayJul 10Drizzle35%0.09″97°73°+4°
AQI 124 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 28 in the last 6 hours — air quality is degrading. Ozone at AQI 81. Overcast through the UV peak window (cloud cover ~81%) — afternoon ozone should stay flat.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 81. Overcast through the UV peak window (cloud cover ~81%) — afternoon ozone should stay flat.
- Present
- AQI 81
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 11.7 µg/m³, PM10 at 12.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- Wind
- breezy
- 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
- 11:20 PM
- Moonset
- 11:13 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Hillsboro at a glance
- Today vs. normal: 5°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: 21641
16-Day Forecast — Hillsboro
- Sat100°78°28%
- Sun97°76°27%
- Mon89°72°74%
- Tue78°71°70%
- Wed82°68°35%
- Thu93°66°9%
- Fri97°73°35%
- Sat84°68°35%
- Sun79°67°23%
- Mon86°61°17%
- Tue89°63°16%
- Wed91°66°34%
- Thu89°65°35%
- Fri91°68°32%
- Sat89°71°35%
- Sun93°70°43%
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 — Hillsboro
SPC has placed Hillsboro in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight 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 Hillsboro
- 21641