Williamstown, Kansas Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Williamstown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——84°65°—
- ThursdayJun 4Light Drizzle29%0.02″81°65°-3°
- FridayJun 5Thunderstorm33%—86°70°+5°
- SaturdayJun 6Light Showers33%—86°70°0°
- SundayJun 7Showers62%0.06″82°67°-4°
- MondayJun 8Thunderstorm54%0.03″86°68°+4°
- TuesdayJun 9Thunderstorm23%—90°73°+4°
Ozone at AQI 66. AQI up 8 over the last 6 hours (gradual rise). Overcast through the UV peak window (cloud cover ~65%) — afternoon ozone should stay flat.
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 66. Overcast through the UV peak window (cloud cover ~65%) — afternoon ozone should stay flat.
- Present
- AQI 66
- UV peak
- 7.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 32
PM × Wind × Precip
PM2.5 at 6.3 µg/m³, PM10 at 7.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:10 AM
- Moonset
- 1:24 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Williamstown at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 10 (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 — Williamstown
SPC has placed Williamstown in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- DAY 3MRGLMarginal Risk
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.