Circle, Montana Weather
Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →
Circle weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——87°56°—
- SundayJul 5Overcast13%—91°62°+4°
- MondayJul 6Overcast13%—86°68°-5°
- TuesdayJul 7Heavy Showers55%0.82″73°59°-13°
- WednesdayJul 8Overcast38%—84°57°+11°
- ThursdayJul 9Overcast16%—87°68°+3°
- FridayJul 10Mostly Clear22%—81°64°-6°
AQI 41 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM2.5 at 5.5 µg/m³ (AQI 31) with a 0.83 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 5.5 µg/m³ (AQI 31) with a 0.83 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.83
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:09 PM
- Moonset
- 10:02 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Circle at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: May 31 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 59215
15-Day Forecast — Circle
- Sat87°56°7%
- Sun91°62°13%
- Mon86°68°13%
- Tue73°59°55%
- Wed84°57°38%
- Thu87°68°16%
- Fri81°64°22%
- Sat92°61°9%
- Sun84°68°9%
- Mon81°61°9%
- Tue96°63°15%
- Wed100°73°11%
- Thu93°76°13%
- Fri95°68°13%
- Sat105°77°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Circle
SPC includes Circle in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.
ZIP codes in Circle
- 59215