Croydon, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Croydon weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Showers51%0.25″102°76°—
- SundayJul 5Heavy Rain91%2.3″96°72°-6°
- MondayJul 6T-storm w/ Hail91%0.43″79°66°-17°
- TuesdayJul 7Light Drizzle67%0.01″66°62°-13°
- WednesdayJul 8Overcast14%—86°58°+20°
- ThursdayJul 9Light Drizzle27%—90°67°+4°
- FridayJul 10Light Drizzle33%—94°71°+4°
AQI 61 (Moderate), driven by PM2.5. AQI up 7 over the last 6 hours (gradual rise). PM2.5 at 23.1 µg/m³ (AQI 77) with a 0.91 fine-to-coarse ratio and 4 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 during the projected peak around 6 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 46 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 29 around 1 PM.
- Present
- AQI 46
- UV peak
- 4.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 29
PM × Wind × Precip
PM2.5 at 23.1 µg/m³ (AQI 77) with a 0.91 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- Wind
- calm
- 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
- 10:53 PM
- Moonset
- 10:03 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Croydon at a glance
- Today vs. normal: 9°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: 19021
16-Day Forecast — Croydon
- Sat102°76°51%
- Sun96°72°91%
- Mon79°66°91%
- Tue66°62°67%
- Wed86°58°14%
- Thu90°67°27%
- Fri94°71°33%
- Sat83°72°34%
- Sun75°68°33%
- Mon72°67°19%
- Tue81°65°17%
- Wed91°68°22%
- Thu96°74°23%
- Fri97°78°33%
- Sat80°72°35%
- Sun89°70°36%
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 — Croydon
SPC has placed Croydon 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 Croydon
- 19021