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 4Light Drizzle20%0.01″96°69°—
- SundayJul 5Heavy Rain96%1.1″91°72°-5°
- MondayJul 6Thunderstorm86%0.40″77°65°-14°
- TuesdayJul 7Light Drizzle70%—75°62°-2°
- WednesdayJul 8Overcast17%—84°58°+9°
- ThursdayJul 9Overcast42%—89°63°+5°
- FridayJul 10Drizzle41%—85°67°-4°
AQI 56 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 12.3 µg/m³ (AQI 57) with a 0.93 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.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 3.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 21 around 1 PM.
- Present
- AQI 43
- UV peak
- 3.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 21
PM × Wind × Precip
PM2.5 at 12.3 µg/m³ (AQI 57) with a 0.93 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- 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
- 11:06 PM
- Moonset
- 10:16 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Defiance at a glance
- Today vs. normal: 9°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
- Sat96°69°20%
- Sun91°72°96%
- Mon77°65°86%
- Tue75°62°70%
- Wed84°58°17%
- Thu89°63°42%
- Fri85°67°41%
- Sat83°68°35%
- Sun78°63°30%
- Mon78°61°17%
- Tue75°64°12%
- Wed81°63°23%
- Thu92°67°21%
- Fri92°71°34%
- Sat83°70°39%
- Sun86°66°35%
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