Columbia, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Columbia weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle59%—103°78°—
- SundayJul 5Light Rain86%0.06″94°74°-9°
- MondayJul 6Heavy Drizzle86%0.13″75°63°-19°
- TuesdayJul 7Light Drizzle71%0.01″70°60°-5°
- WednesdayJul 8Clear19%—83°56°+13°
- ThursdayJul 9Light Drizzle19%—88°68°+5°
- FridayJul 10Thunderstorm51%—89°69°+1°
AQI 54 (Moderate), driven by Ozone. Ozone at AQI 110 now. With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 122 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 110 now. With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 122 around 1 PM.
- Present
- AQI 110
- UV peak
- 8.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 122
PM × Wind × Precip
PM2.5 at 9.5 µg/m³, PM10 at 10.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.94
- Wind
- light
- Recent rain
- 0h 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
- 10:59 PM
- Moonset
- 10:09 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Columbia at a glance
- Today vs. normal: 24°F above the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 17512
16-Day Forecast — Columbia
- Sat103°78°59%
- Sun94°74°86%
- Mon75°63°86%
- Tue70°60°71%
- Wed83°56°19%
- Thu88°68°19%
- Fri89°69°51%
- Sat84°71°26%
- Sun74°65°27%
- Mon70°64°25%
- Tue76°64°21%
- Wed86°67°24%
- Thu92°70°32%
- Fri93°72°30%
- Sat80°72°22%
- Sun84°68°29%
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 — Columbia
SPC has placed Columbia in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight 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 Columbia
- 17512