Washington, Iowa Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Washington weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast18%—88°59°—
- FridayJun 5Thunderstorm61%0.84″78°67°-10°
- SaturdayJun 6Thunderstorm64%0.41″85°67°+7°
- SundayJun 7Light Showers56%—85°69°0°
- MondayJun 8Showers60%0.01″82°69°-3°
- TuesdayJun 9Thunderstorm39%—81°67°-1°
- WednesdayJun 10Thunderstorm19%—91°74°+10°
Ozone at AQI 38 now. AQI down 26 over the last 6 hours — air quality is improving sharply. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 17 by mid-afternoon.
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 38 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 17 by mid-afternoon.
- Present
- AQI 38
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 17
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:41 AM
- Moonset
- 2:05 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Washington at a glance
- Today vs. normal: 14°F below the seasonal normal for this latitude
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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 — Washington
SPC has placed Washington in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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.