Langhorne, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Langhorne weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain51%0.83″99°74°—
- SundayJul 5Heavy Rain59%3.9″91°71°-8°
- MondayJul 6Thunderstorm91%0.62″77°71°-14°
- TuesdayJul 7Light Showers87%0.01″75°67°-2°
- WednesdayJul 8Overcast31%—80°65°+5°
- ThursdayJul 9Overcast11%—91°68°+11°
- FridayJul 10Overcast38%—89°73°-2°
AQI 125 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 60 in the last 6 hours — air quality is degrading. Ozone at AQI 93. Overcast through the UV peak window (cloud cover ~100%) — 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 93. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 93
- UV peak
- 0.2 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 11
PM × Wind × Precip
PM2.5 at 6.5 µg/m³ (AQI 36) with a 0.97 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.97
- 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
- 10:53 PM
- Moonset
- 10:03 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Langhorne at a glance
- Today vs. normal: 26°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: 19047
16-Day Forecast — Langhorne
- Sat99°74°51%
- Sun91°71°59%
- Mon77°71°91%
- Tue75°67°87%
- Wed80°65°31%
- Thu91°68°11%
- Fri89°73°38%
- Sat88°75°36%
- Sun85°71°28%
- Mon81°69°21%
- Tue87°68°19%
- Wed91°68°38%
- Thu91°71°40%
- Fri95°75°42%
- Sat93°75°35%
- Sun90°77°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 — Langhorne
SPC has placed Langhorne 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 Langhorne
- 19047
- 19048
- 19049