Dewey, Montana Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Dewey weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Partly Cloudy——81°47°—
- SundayJul 5Rain33%0.26″86°58°+5°
- MondayJul 6Showers77%0.43″74°53°-12°
- TuesdayJul 7Light Drizzle77%—79°52°+5°
- WednesdayJul 8Overcast38%—84°55°+5°
- ThursdayJul 9Overcast17%—80°48°-4°
- FridayJul 10Clear——86°53°+6°
AQI 45 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±4 points). Ozone at AQI 34. Overcast through the UV peak window (cloud cover ~94%) — afternoon ozone should stay flat.
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 34. Overcast through the UV peak window (cloud cover ~94%) — afternoon ozone should stay flat.
- Present
- AQI 34
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
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
- 11:55 PM
- Moonset
- 11:46 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Dewey at a glance
- Today vs. normal: 68°F — typical for the season
- Last frost: May 21 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Dewey
- Sat81°47°1%
- Sun86°58°33%
- Mon74°53°77%
- Tue79°52°77%
- Wed84°55°38%
- Thu80°48°17%
- Fri86°53°2%
- Sat95°58°2%
- Sun96°63°7%
- Mon95°63°13%
- Tue97°64°18%
- Wed96°62°25%
- Thu94°61°26%
- Fri95°62°30%
- Sat96°65°32%
- Sun94°61°19%
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 — Dewey
SPC has placed Dewey 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 Dewey
- 59727