Winston, Montana Weather
Thunderheads build by noon. Day 90 of spring. Read this microseason across nine climate regions →
Winston weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Overcast——69°51°—
- ThursdayJun 18Partly Cloudy——72°47°+3°
- FridayJun 19Overcast——72°46°0°
- SaturdayJun 20Showers30%0.01″75°54°+3°
- SundayJun 21Drizzle23%0.03″66°48°-9°
- MondayJun 22Overcast——73°48°+7°
- TuesdayJun 23Partly Cloudy——80°50°+7°
AQI 40 (Good), driven by Ozone. AQI up 5 over the last 6 hours (gradual rise). Ozone at AQI 49 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
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 49 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 49
- UV peak
- 4.9 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 49
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
- 8:07 AM
- Moonset
- 11:32 PM
- In sign
- ♌︎ Leo
Thunderheads build by noon
Winston at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: May 25 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Winston
- Wed68°51°4%
- Thu72°48°7%
- Fri72°46°1%
- Sat75°54°30%
- Sun66°48°23%
- Mon73°48°6%
- Tue80°50°3%
- Wed80°55°24%
- Thu79°53°15%
- Fri79°59°15%
- Sat83°59°12%
- Sun82°60°27%
- Mon81°57°26%
- Tue80°57°29%
- Wed86°62°19%
- Thu87°59°19%
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.
SPC Convective Outlook
Storm Prediction Center — Winston
SPC has placed Winston in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
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 Winston
- 59647