Cambridge, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Cambridge weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast20%—101°82°—
- SundayJul 5Overcast24%—98°77°-3°
- MondayJul 6Thunderstorm73%1.1″92°72°-6°
- TuesdayJul 7Light Showers73%—87°71°-5°
- WednesdayJul 8Light Showers36%—79°69°-8°
- ThursdayJul 9Partly Cloudy——92°68°+13°
- FridayJul 10Overcast34%—99°74°+7°
AQI 131 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 76 in the last 6 hours — air quality is degrading. Ozone at AQI 142 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 142 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 142
- UV peak
- 2.1 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 142
PM × Wind × Precip
PM2.5 at 14.6 µg/m³ (AQI 61) with a 0.90 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- 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
- 10:55 PM
- Moonset
- 10:09 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Cambridge at a glance
- Today vs. normal: 27°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: 21613
16-Day Forecast — Cambridge
- Sat101°82°20%
- Sun98°77°24%
- Mon92°72°73%
- Tue87°71°73%
- Wed79°69°36%
- Thu92°68°9%
- Fri99°74°34%
- Sat93°76°34%
- Sun84°72°25%
- Mon81°68°19%
- Tue88°67°16%
- Wed93°72°41%
- Thu91°73°41%
- Fri93°73°39%
- Sat97°73°33%
- Sun94°77°45%
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 — Cambridge
SPC has placed Cambridge 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 Cambridge
- 21613