Mammoth, Montana Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Mammoth weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Mostly Clear——81°54°—
- SundayJul 5Light Drizzle25%0.03″84°57°+3°
- MondayJul 6Showers62%0.25″72°52°-12°
- TuesdayJul 7Light Drizzle62%—77°51°+5°
- WednesdayJul 8Drizzle23%—83°56°+6°
- ThursdayJul 9Partly Cloudy23%—79°50°-4°
- FridayJul 10Clear——84°54°+5°
AQI 46 (Good), driven by Ozone. AQI up 20 in the last 6 hours — air quality is degrading. Ozone at AQI 49 — peak already passed at 1 PM under clear skies. 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 49 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 49
- UV peak
- 1.8 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 49
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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:51 PM
- Moonset
- 11:43 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Mammoth at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: May 20 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Mammoth
- Sat81°54°1%
- Sun84°58°25%
- Mon72°52°62%
- Tue77°51°62%
- Wed83°56°23%
- Thu79°50°23%
- Fri84°54°3%
- Sat94°60°3%
- Sun95°66°7%
- Mon95°67°13%
- Tue94°65°22%
- Wed97°64°20%
- Thu96°66°18%
- Fri95°62°19%
- Sat93°66°16%
- Sun89°60°18%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Mammoth
SPC has placed Mammoth in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal 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.
ZIP codes in Mammoth
- 59747
- 59721