Dewey, Montana Weather
Thunderheads build by noon. Day 90 of spring. Read this microseason across nine climate regions →
Dewey weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Mostly Clear——68°52°—
- ThursdayJun 18Overcast——74°47°+6°
- FridayJun 19Overcast——80°42°+6°
- SaturdayJun 20Overcast36%—77°54°-3°
- SundayJun 21Light Drizzle16%—74°47°-3°
- MondayJun 22Light Drizzle11%—74°47°0°
- TuesdayJun 23Overcast——83°51°+9°
AQI 38 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 41 now. With UV 1.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 41 now. With UV 1.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 around 1 PM.
- Present
- AQI 41
- UV peak
- 1.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 7
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
- 8:15 AM
- Moonset
- 11:34 PM
- In sign
- ♌︎ Leo
Thunderheads build by noon
Dewey at a glance
- Today vs. normal: 15°F below the seasonal normal for this latitude
- Last frost: May 21 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Dewey
- Wed68°52°1%
- Thu74°47°1%
- Fri80°42°2%
- Sat77°54°36%
- Sun74°47°16%
- Mon74°47°11%
- Tue83°51°8%
- Wed83°55°16%
- Thu84°52°13%
- Fri82°55°10%
- Sat74°51°14%
- Sun80°44°16%
- Mon81°53°16%
- Tue79°48°13%
- Wed89°51°29%
- Thu91°59°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 Dewey
- 59727