Williamsburg, Iowa Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Williamsburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——86°68°—
- MondayJul 6Partly Cloudy——87°67°+1°
- TuesdayJul 7Overcast——82°65°-5°
- WednesdayJul 8T-storm w/ Hail38%—85°66°+3°
- ThursdayJul 9Light Showers57%0.05″77°65°-8°
- FridayJul 10Light Drizzle16%—80°66°+3°
- SaturdayJul 11Light Drizzle——74°64°-6°
AQI 38 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 4.7 µg/m³ (AQI 26) with a 0.85 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.85
- 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
- 11:28 PM
- Moonset
- 11:20 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Williamsburg at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 52361
15-Day Forecast — Williamsburg
- Sun86°68°7%
- Mon87°67°1%
- Tue82°65°2%
- Wed85°66°38%
- Thu77°65°57%
- Fri80°66°16%
- Sat74°64°6%
- Sun76°55°7%
- Mon81°59°7%
- Tue85°67°4%
- Wed85°67°16%
- Thu85°69°23%
- Fri88°73°17%
- Sat89°76°16%
- Sun83°63°16%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Williamsburg
SPC includes Williamsburg in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 Williamsburg
- 52361