Fairfield, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Fairfield weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast28%—101°76°—
- SundayJul 5Heavy Drizzle89%0.10″95°74°-6°
- MondayJul 6Light Showers89%0.19″78°64°-17°
- TuesdayJul 7Light Drizzle75%0.01″71°61°-7°
- WednesdayJul 8Overcast18%—85°57°+14°
- ThursdayJul 9Overcast32%—90°63°+5°
- FridayJul 10Light Drizzle38%—87°70°-3°
AQI 53 (Moderate), driven by PM2.5. AQI projected to climb to 73 over the next 6 hours. PM2.5 at 10.9 µg/m³ (AQI 54) with a 0.92 fine-to-coarse ratio and 5 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 7 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 48 now. With UV 4.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 26 around 1 PM.
- Present
- AQI 48
- UV peak
- 4.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 26
PM × Wind × Precip
PM2.5 at 10.9 µg/m³ (AQI 54) with a 0.92 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.92
- 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
- 11:02 PM
- Moonset
- 10:13 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Fairfield at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 17320
16-Day Forecast — Fairfield
- Sat100°76°28%
- Sun95°74°89%
- Mon78°64°89%
- Tue71°61°75%
- Wed85°57°18%
- Thu90°63°32%
- Fri87°70°38%
- Sat86°69°41%
- Sun76°66°26%
- Mon75°65°20%
- Tue77°65°14%
- Wed86°67°23%
- Thu93°69°21%
- Fri94°72°30%
- Sat81°70°35%
- Sun88°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 — Fairfield
SPC has placed Fairfield 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 Fairfield
- 17320