Chinook, Montana Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Chinook weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Partly Cloudy——87°52°—
- SundayJul 5Overcast——87°60°0°
- MondayJul 6Heavy Drizzle27%0.01″83°56°-4°
- TuesdayJul 7Light Drizzle66%—73°60°-10°
- WednesdayJul 8Heavy Showers46%0.37″91°57°+18°
- ThursdayJul 9Overcast46%—78°62°-13°
- FridayJul 10Clear——85°58°+7°
AQI 42 (Good), driven by Ozone. AQI up 16 in the last 6 hours — air quality is degrading. Ozone at AQI 47 — peak already passed at 1 PM under clear 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 47 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 47
- UV peak
- 1.5 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 47
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
- 11:43 PM
- Moonset
- 11:29 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Chinook at a glance
- Today vs. normal: 24°F above the seasonal normal for this latitude
- Last frost: June 7 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 59523
16-Day Forecast — Chinook
- Sat88°52°0%
- Sun87°59°6%
- Mon83°56°27%
- Tue73°60°66%
- Wed91°57°46%
- Thu78°62°46%
- Fri85°58°3%
- Sat101°62°3%
- Sun93°72°3%
- Mon99°69°6%
- Tue106°70°13%
- Wed102°74°13%
- Thu85°68°16%
- Fri93°60°13%
- Sat91°62°6%
- Sun88°61°10%
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 — Chinook
SPC includes Chinook 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 Chinook
- 59523