Swan, Iowa Weather
Lesser ripening, greater heat. Day 89 of spring. Read this microseason across nine climate regions →
Swan weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——81°53°—
- TuesdayJun 16Overcast12%—77°62°-4°
- WednesdayJun 17T-storm w/ Hvy Hail80%—85°65°+8°
- ThursdayJun 18Overcast——73°54°-12°
- FridayJun 19Overcast——74°55°+1°
- SaturdayJun 20Showers32%0.20″76°61°+2°
- SundayJun 21Showers53%1.2″71°62°-5°
AQI 43 (Good), driven by Ozone. AQI up 9 over the last 6 hours (gradual rise). Ozone at AQI 34 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
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 34 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
- Present
- AQI 34
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 4.5 µg/m³, PM10 at 4.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.98
- 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).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 6:52 AM
- Moonset
- 10:08 PM
- In sign
- ♋︎ Cancer
Lesser ripening, greater heat
Swan at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 25 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Swan
- Mon81°53°0%
- Tue77°62°12%
- Wed85°65°80%
- Thu73°54°4%
- Fri74°55°3%
- Sat76°61°32%
- Sun71°62°53%
- Mon68°52°34%
- Tue65°54°8%
- Wed77°55°12%
- Thu84°62°15%
- Fri75°57°27%
- Sat76°61°35%
- Sun81°64°45%
- Mon76°61°52%
- Tue78°57°38%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 16, 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 — Swan
SPC has placed Swan in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3SLGTSlight Risk
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 Swan
- 50252