Mammoth, Wyoming Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Mammoth weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——71°50°—
- FridayJun 5Clear——75°47°+4°
- SaturdayJun 6Light Drizzle—0.02″76°50°+1°
- SundayJun 7Heavy Drizzle21%0.18″59°40°-17°
- MondayJun 8Overcast11%—67°37°+8°
- TuesdayJun 9Overcast28%—65°47°-2°
- WednesdayJun 10Light Drizzle49%—72°50°+7°
PM2.5/PM10 ratio 0.58 with 8 mph wind — characteristic of long-range haze transport rather than a local source. AQI down 10 over the last 6 hours (steady decline since this morning).
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 33. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5/PM10 ratio 0.58 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.58
- Wind
- light
- 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
- 6:11 AM
- Moonset
- 3:11 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Mammoth at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: May 16 (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 — Mammoth
SPC has placed Mammoth in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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.