Cairnbrook, Pennsylvania Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Cairnbrook weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——72°45°—
- ThursdayJun 4Overcast——75°54°+3°
- FridayJun 5Overcast——75°55°0°
- SaturdayJun 6Overcast52%—76°56°+1°
- SundayJun 7Drizzle52%0.01″74°60°-2°
- MondayJun 8Foggy——71°55°-3°
- TuesdayJun 9Partly Cloudy12%—74°54°+3°
Ozone at AQI 44 now. AQI flat over the last 6 hours (within ±4 points). With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 11 by mid-afternoon.
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 44 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 11 by mid-afternoon.
- Present
- AQI 44
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 11
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
- 3:44 AM
- Moonset
- 1:14 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Cairnbrook at a glance
- Today vs. normal: 12°F below the seasonal normal for this latitude
- Last frost: April 17 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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.