Bryn Athyn, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Bryn Athyn weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain53%0.55″97°74°—
- SundayJul 5Heavy Rain59%0.59″90°72°-7°
- MondayJul 6Showers91%0.30″79°71°-11°
- TuesdayJul 7Light Showers88%—75°67°-4°
- WednesdayJul 8Overcast35%—80°65°+5°
- ThursdayJul 9Overcast12%—90°68°+10°
- FridayJul 10Light Drizzle40%—89°72°-1°
AQI 123 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 57 in the last 6 hours — air quality is degrading. Ozone at AQI 90. Overcast through the UV peak window (cloud cover ~97%) — 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 90. Overcast through the UV peak window (cloud cover ~97%) — afternoon ozone should stay flat.
- Present
- AQI 90
- UV peak
- 0.2 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 11
PM × Wind × Precip
PM2.5 at 7.3 µg/m³, PM10 at 7.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.99
- Wind
- light
- 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
- 10:54 PM
- Moonset
- 10:03 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Bryn Athyn at a glance
- Today vs. normal: 22°F above the seasonal normal for this latitude
- 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: 19009
16-Day Forecast — Bryn Athyn
- Sat97°74°53%
- Sun90°72°59%
- Mon79°71°91%
- Tue75°67°88%
- Wed80°65°35%
- Thu90°68°12%
- Fri89°72°40%
- Sat87°74°36%
- Sun83°70°27%
- Mon82°69°20%
- Tue87°69°19%
- Wed90°68°38%
- Thu90°71°40%
- Fri94°75°42%
- Sat92°75°35%
- Sun90°76°40%
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 — Bryn Athyn
SPC has placed Bryn Athyn 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 Bryn Athyn
- 19009
- 19006