Cairnbrook, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Cairnbrook weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain32%0.24″88°64°—
- SundayJul 5Drizzle82%0.04″82°67°-6°
- MondayJul 6T-storm w/ Hail87%0.05″74°63°-8°
- TuesdayJul 7Light Drizzle47%—73°59°-1°
- WednesdayJul 8Light Drizzle20%—78°54°+5°
- ThursdayJul 9Overcast47%—81°61°+3°
- FridayJul 10Light Drizzle44%—76°65°-5°
AQI 57 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 14.5 µg/m³ (AQI 61) with a 0.94 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
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 37 now. With UV 3.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 18 around 1 PM.
- Present
- AQI 37
- UV peak
- 3.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 18
PM × Wind × Precip
PM2.5 at 14.5 µg/m³ (AQI 61) with a 0.94 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- 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
- 11:09 PM
- Moonset
- 10:19 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Cairnbrook at a glance
- Today vs. normal: 74°F — typical for the season
- Last frost: April 17 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 15924
16-Day Forecast — Cairnbrook
- Sat88°64°32%
- Sun82°67°82%
- Mon74°63°87%
- Tue73°59°47%
- Wed78°54°20%
- Thu81°61°47%
- Fri76°65°44%
- Sat78°64°40%
- Sun73°62°29%
- Mon68°58°22%
- Tue67°57°17%
- Wed78°62°29%
- Thu86°66°35%
- Fri84°68°46%
- Sat77°65°43%
- Sun79°63°44%
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 — Cairnbrook
SPC has placed Cairnbrook in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal 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 Cairnbrook
- 15924