Defiance, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Defiance weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Drizzle35%0.09″95°69°—
- SundayJul 5Light Drizzle50%0.02″89°72°-6°
- MondayJul 6Thunderstorm85%—82°67°-7°
- TuesdayJul 7Light Showers74%—81°66°-1°
- WednesdayJul 8Light Drizzle19%—74°64°-7°
- ThursdayJul 9Light Drizzle14%—86°62°+12°
- FridayJul 10Light Drizzle53%0.02″81°67°-5°
AQI 74 (Moderate), driven by Ozone. AQI up 21 in the last 6 hours — air quality is degrading. Ozone at AQI 75 — 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 75 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 75
- UV peak
- 2.1 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 75
PM × Wind × Precip
PM2.5 at 6.5 µg/m³, PM10 at 7.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- 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
- 11:06 PM
- Moonset
- 10:16 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Defiance at a glance
- Today vs. normal: 23°F above the seasonal normal for this latitude
- Last frost: April 17 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 16633
16-Day Forecast — Defiance
- Sat95°69°35%
- Sun89°72°50%
- Mon82°67°85%
- Tue81°66°74%
- Wed74°64°19%
- Thu86°62°14%
- Fri81°67°53%
- Sat81°65°33%
- Sun79°60°18%
- Mon77°60°22%
- Tue78°56°19%
- Wed83°57°39%
- Thu84°58°42%
- Fri81°62°39%
- Sat87°66°39%
- Sun81°68°43%
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 — Defiance
SPC has placed Defiance 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 Defiance
- 16633
- 16679