Petersburg, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Petersburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle46%0.01″97°70°—
- SundayJul 5Overcast48%—91°72°-6°
- MondayJul 6Light Showers79%0.01″82°68°-9°
- TuesdayJul 7Showers77%—83°68°+1°
- WednesdayJul 8Drizzle20%0.01″78°65°-5°
- ThursdayJul 9Light Drizzle15%—90°62°+12°
- FridayJul 10Light Drizzle56%0.06″83°66°-7°
AQI 81 (Moderate), driven by Ozone. AQI up 27 in the last 6 hours — air quality is degrading. Ozone at AQI 88 — peak already passed at 1 PM under clear 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 88 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 88
- UV peak
- 2.4 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 88
PM × Wind × Precip
PM2.5 at 6.5 µg/m³, PM10 at 6.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.94
- Wind
- breezy
- 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
- 11:06 PM
- Moonset
- 10:15 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Petersburg at a glance
- Today vs. normal: 26°F above the seasonal normal for this latitude
- Last frost: April 19 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 16669
16-Day Forecast — Petersburg
- Sat97°70°46%
- Sun91°72°48%
- Mon82°68°79%
- Tue83°68°77%
- Wed78°65°20%
- Thu90°62°15%
- Fri83°66°56%
- Sat83°65°31%
- Sun81°60°19%
- Mon78°58°23%
- Tue82°56°21%
- Wed86°56°36%
- Thu87°57°52%
- Fri83°60°42%
- Sat91°67°52%
- Sun81°69°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 — Petersburg
SPC has placed Petersburg in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal 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 Petersburg
- 16669