Big Horn, Wyoming Weather
Pikas hayfeeding in granite peaks. Day 76 of spring. Read this microseason across nine climate regions →
Big Horn weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——75°51°—
- ThursdayJun 4Overcast13%—75°54°0°
- FridayJun 5Overcast——83°54°+8°
- SaturdayJun 6Drizzle11%—95°63°+12°
- SundayJun 7Drizzle63%0.03″73°56°-22°
- MondayJun 8Light Drizzle54%—78°46°+5°
- TuesdayJun 9Overcast21%—77°59°-1°
Ozone at AQI 41 — peak already passed at 1 PM under clear skies. AQI up 7 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 41 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 41
- UV peak
- 3.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 41
PM × Wind × Precip
PM2.5 at 4.7 µg/m³ (AQI 26) with a 0.75 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.75
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 5:21 AM
- Moonset
- 1:51 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Big Horn at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: May 14 (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 3, 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 — Big Horn
SPC has placed Big Horn in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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.