Cambridge, Pennsylvania Weather
Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →
Cambridge weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Light Drizzle43%—74°61°—
- TuesdayJun 16Overcast——75°53°+1°
- WednesdayJun 17Drizzle34%—78°60°+3°
- ThursdayJun 18Drizzle40%0.04″87°66°+9°
- FridayJun 19Light Drizzle31%0.03″75°61°-12°
- SaturdayJun 20Overcast——74°54°-1°
- SundayJun 21Overcast——75°53°+1°
AQI 39 (Good), driven by PM2.5. AQI up 5 over the last 6 hours (gradual rise). PM2.5 at 7.1 µg/m³, PM10 at 7.7 µg/m³ — typical background levels with no transport signature.
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 35 now. With UV 0.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
- Present
- AQI 35
- UV peak
- 0.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 7.1 µg/m³, PM10 at 7.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- Wind
- breezy
- 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
- 5:34 AM
- Moonset
- 8:48 PM
- In sign
- ♋︎ Cancer
Solstice approaches — longest light
Cambridge at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Cambridge
- Mon74°61°43%
- Tue75°53°0%
- Wed78°60°34%
- Thu87°66°40%
- Fri75°61°31%
- Sat74°54°6%
- Sun75°53°8%
- Mon62°57°36%
- Tue72°55°36%
- Wed67°53°12%
- Thu73°60°20%
- Fri64°60°42%
- Sat78°59°34%
- Sun83°56°30%
- Mon86°68°29%
- Tue78°68°40%
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 — Cambridge
SPC has placed Cambridge 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 Cambridge
- 19344
- 17555