Troy, Montana Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Troy weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast27%—73°59°—
- FridayJun 5Overcast——69°52°-4°
- SaturdayJun 6Overcast21%—62°47°-7°
- SundayJun 7Light Drizzle11%—63°41°+1°
- MondayJun 8Light Drizzle21%—65°43°+2°
- TuesdayJun 9Overcast49%—70°45°+5°
- WednesdayJun 10Light Drizzle46%0.15″56°52°-14°
PM2.5 at 9.9 µg/m³ (AQI 52) with a 0.66 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust. AQI flat over the last 6 hours (within ±3 points).
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 40 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 18 by mid-afternoon.
- Present
- AQI 40
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 18
PM × Wind × Precip
PM2.5 at 9.9 µg/m³ (AQI 52) with a 0.66 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.66
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:47 AM
- Moonset
- 3:19 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Troy at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: June 6 (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.