Mercer, Pennsylvania Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Mercer weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Heavy Rain53%0.80″83°66°—
- MondayJul 6Drizzle34%0.03″84°66°+1°
- TuesdayJul 7Light Drizzle42%—77°63°-7°
- WednesdayJul 8Overcast——81°58°+4°
- ThursdayJul 9Thunderstorm51%0.02″83°61°+2°
- FridayJul 10Light Drizzle65%—76°65°-7°
- SaturdayJul 11Heavy Drizzle28%0.20″68°61°-8°
AQI 33 (Good), driven by Ozone. AQI up 7 over the last 6 hours (gradual rise). Ozone at AQI 60. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
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 60. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 60
- UV peak
- 6.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 26
PM × Wind × Precip
PM2.5 at 4.6 µg/m³, PM10 at 4.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.96
- Wind
- light
- 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
- 11:39 PM
- Moonset
- 11:30 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Mercer at a glance
- Today vs. normal: 11°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 code: 16137
16-Day Forecast — Mercer
- Sun83°66°53%
- Mon84°66°34%
- Tue77°63°42%
- Wed81°58°9%
- Thu83°61°51%
- Fri76°65°65%
- Sat68°61°28%
- Sun79°59°22%
- Mon83°62°14%
- Tue88°68°16%
- Wed73°57°16%
- Thu74°52°35%
- Fri79°53°30%
- Sat73°61°29%
- Sun74°66°45%
- Mon82°63°48%
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 — Mercer
SPC has placed Mercer 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 Mercer
- 16137