Williamsport, Pennsylvania Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Williamsport weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Light Drizzle39%0.01″85°71°—
- MondayJul 6Heavy Rain71%1.4″76°68°-9°
- TuesdayJul 7Light Drizzle59%0.02″69°64°-7°
- WednesdayJul 8Light Drizzle28%—80°62°+11°
- ThursdayJul 9Overcast35%—93°62°+13°
- FridayJul 10Drizzle49%0.02″74°66°-19°
- SaturdayJul 11Overcast31%—83°57°+9°
AQI 48 (Good), driven by Ozone. AQI up 20 in the last 6 hours — air quality is degrading. Ozone at AQI 48 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
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 48 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 48
- UV peak
- 1.8 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 48
PM × Wind × Precip
PM2.5 at 4.7 µg/m³ (AQI 26) with a 0.96 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.96
- 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
- 11:26 PM
- Moonset
- 11:17 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Williamsport at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: April 23 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 17701, 17702
16-Day Forecast — Williamsport
- Sun85°71°39%
- Mon76°68°71%
- Tue69°64°59%
- Wed80°62°28%
- Thu93°62°35%
- Fri74°66°49%
- Sat83°57°31%
- Sun67°64°15%
- Mon76°62°20%
- Tue63°60°17%
- Wed71°60°18%
- Thu79°58°23%
- Fri86°58°23%
- Sat83°62°26%
- Sun86°63°29%
- Mon78°65°32%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Williamsport
SPC has placed Williamsport in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Williamsport
- 17701
- 17703
- 17705