Lancaster, Ohio Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Lancaster weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast16%—95°72°—
- SundayJul 5Rain43%0.26″90°70°-5°
- MondayJul 6Thunderstorm43%—81°67°-9°
- TuesdayJul 7Overcast20%—79°64°-2°
- WednesdayJul 8Light Drizzle17%—85°65°+6°
- ThursdayJul 9Thunderstorm50%—83°66°-2°
- FridayJul 10Thunderstorm53%—81°70°-2°
AQI 35 (Good), driven by PM2.5. AQI down 8 over the last 6 hours (gradual decline). PM2.5 at 7.7 µg/m³ (AQI 43) with a 0.91 fine-to-coarse ratio and 3 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 during the projected peak around 8 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 42 now. With UV 4.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 24 around 1 PM.
- Present
- AQI 42
- UV peak
- 4.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 24
PM × Wind × Precip
PM2.5 at 7.7 µg/m³ (AQI 43) with a 0.91 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- 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
- 11:24 PM
- Moonset
- 10:35 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Lancaster at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 43130
16-Day Forecast — Lancaster
- Sat94°72°16%
- Sun90°70°43%
- Mon81°67°43%
- Tue79°64°20%
- Wed85°65°17%
- Thu83°66°50%
- Fri81°70°53%
- Sat85°67°43%
- Sun74°62°30%
- Mon67°55°14%
- Tue79°62°14%
- Wed83°64°26%
- Thu86°67°23%
- Fri87°69°16%
- Sat86°69°40%
- Sun86°69°32%
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 — Lancaster
SPC has placed Lancaster 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 Lancaster
- 43130