Williamsport, Indiana Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Williamsport weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain68%1.8″89°72°—
- SundayJul 5Overcast30%—83°69°-6°
- MondayJul 6Light Drizzle16%—83°68°0°
- TuesdayJul 7Overcast——81°62°-2°
- WednesdayJul 8Clear——82°63°+1°
- ThursdayJul 9Thunderstorm43%0.06″82°68°0°
- FridayJul 10Light Drizzle43%0.01″78°70°-4°
AQI 32 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.2 µg/m³ (AQI 51) with a 0.89 fine-to-coarse ratio and 6 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.
What's driving it
Ozone × UV × Sky
Ozone at AQI 47 now. With UV 5.9 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 26 around 1 PM.
- Present
- AQI 47
- UV peak
- 5.9 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 26
PM × Wind × Precip
PM2.5 at 9.2 µg/m³ (AQI 51) with a 0.89 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.89
- 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
- 11:44 PM
- Moonset
- 10:55 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Williamsport at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 47993
16-Day Forecast — Williamsport
- Sat89°72°68%
- Sun83°69°30%
- Mon83°68°16%
- Tue81°62°5%
- Wed82°63°3%
- Thu82°68°43%
- Fri78°70°43%
- Sat83°66°16%
- Sun71°59°9%
- Mon70°58°8%
- Tue76°59°11%
- Wed81°62°24%
- Thu83°66°27%
- Fri83°69°29%
- Sat85°70°26%
- Sun84°72°39%
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 — Williamsport
SPC has placed Williamsport in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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 Williamsport
- 47993