Little Bitterroot Lake, Montana Weather
Thunderheads build by noon. Day 90 of spring. Read this microseason across nine climate regions →
Little Bitterroot Lake weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Overcast——70°50°—
- ThursdayJun 18Overcast——74°49°+4°
- FridayJun 19Overcast——77°45°+3°
- SaturdayJun 20Overcast——82°50°+5°
- SundayJun 21Overcast14%—80°49°-2°
- MondayJun 22Partly Cloudy14%—86°51°+6°
- TuesdayJun 23Partly Cloudy——85°55°-1°
AQI 48 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 39 now. With UV 3.3 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12 around 1 PM.
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 39 now. With UV 3.3 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12 around 1 PM.
- Present
- AQI 39
- UV peak
- 3.3 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 12
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
- 8:12 AM
- Moonset
- 11:53 PM
- In sign
- ♋︎ Cancer
Thunderheads build by noon
Little Bitterroot Lake at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: June 4 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Little Bitterroot Lake
- Wed70°50°3%
- Thu74°49°2%
- Fri77°45°0%
- Sat82°50°2%
- Sun80°49°14%
- Mon86°51°14%
- Tue85°55°3%
- Wed67°51°10%
- Thu68°47°8%
- Fri77°48°8%
- Sat86°51°12%
- Sun90°57°19%
- Mon87°60°18%
- Tue82°49°23%
- Wed86°50°16%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Warm-season window is open
As of June 17, 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.
ZIP codes in Little Bitterroot Lake
- 59925