Dayton, Wyoming Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Dayton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast16%—74°52°—
- FridayJun 5Overcast——86°53°+12°
- SaturdayJun 6Overcast——96°63°+10°
- SundayJun 7Overcast75%—79°50°-17°
- MondayJun 8Overcast60%—81°46°+2°
- TuesdayJun 9Overcast19%—88°60°+7°
- WednesdayJun 10Light Drizzle47%0.04″78°56°-10°
Ozone at AQI 42 now. AQI up 7 over the last 6 hours (gradual rise). With UV 5.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 31 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 42 now. With UV 5.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 31 by mid-afternoon.
- Present
- AQI 42
- UV peak
- 5.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 31
PM × Wind × Precip
PM2.5/PM10 ratio 0.65 with 15 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.65
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 5:56 AM
- Moonset
- 2:58 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
Dayton at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: May 15 (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
Warm-season window is open
As of June 4, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
SPC Convective Outlook
Storm Prediction Center — Dayton
SPC has placed Dayton in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWNONENo severe 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.