Siloam Springs, Arkansas Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Siloam Springs weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast21%—82°67°—
- ThursdayJun 4Overcast17%—83°65°+1°
- FridayJun 5Heavy Drizzle18%—79°67°-4°
- SaturdayJun 6Heavy Drizzle36%0.03″78°68°-1°
- SundayJun 7Showers74%—81°68°+3°
- MondayJun 8Thunderstorm52%—86°69°+5°
- TuesdayJun 9Thunderstorm25%—88°72°+2°
Ozone at AQI 42 — peak already passed at 1 PM under partly cloudy skies. AQI up 6 over the last 6 hours (gradual rise). 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 42 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 42
- UV peak
- 0.8 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 42
PM × Wind × Precip
PM2.5 at 7.0 µg/m³, PM10 at 8.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- Wind
- breezy
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:56 AM
- Moonset
- 1:30 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Siloam Springs at a glance
- Today vs. normal: 80°F — typical for the season
- Last frost: March 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 3, 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 — Siloam Springs
SPC has placed Siloam Springs in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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.