Roy, Montana Weather
Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →
Roy weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——86°58°—
- SundayJul 5Light Drizzle34%—87°67°+1°
- MondayJul 6Light Showers34%0.05″80°61°-7°
- TuesdayJul 7Showers53%0.13″64°59°-16°
- WednesdayJul 8Light Drizzle29%0.01″91°56°+27°
- ThursdayJul 9Overcast29%—81°65°-10°
- FridayJul 10Clear12%—81°60°0°
AQI 27 (Good), driven by PM2.5. AQI down 14 over the last 6 hours (gradual decline).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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
- 11:23 PM
- Moonset
- 10:16 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Roy at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: May 30 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 59471
15-Day Forecast — Roy
- Sat86°57°4%
- Sun87°67°34%
- Mon80°61°34%
- Tue64°59°53%
- Wed91°56°29%
- Thu81°65°29%
- Fri81°60°12%
- Sat95°61°10%
- Sun82°66°10%
- Mon85°59°13%
- Tue97°63°19%
- Wed101°72°21%
- Thu92°75°18%
- Fri100°69°19%
- Sat102°71°15%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Roy
SPC includes Roy 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 Roy
- 59471