Herron, Montana Weather
Thunderheads build by noon. Day 90 of spring. Read this microseason across nine climate regions →
Herron weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 16Light Drizzle30%—83°58°—
- WednesdayJun 17Overcast21%—62°50°-21°
- ThursdayJun 18Rain40%0.14″63°50°+1°
- FridayJun 19Overcast——72°46°+9°
- SaturdayJun 20Light Showers37%—80°54°+8°
- SundayJun 21Light Rain37%0.10″64°50°-16°
- MondayJun 22Overcast10%—74°46°+10°
AQI 38 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.5 µg/m³, PM10 at 8.8 µg/m³ — typical background levels with no transport signature.
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 37. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 37
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 7.5 µg/m³, PM10 at 8.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.85
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 7:50 AM
- Moonset
- 11:34 PM
- In sign
- ♋︎ Cancer
Thunderheads build by noon
Herron at a glance
- Today vs. normal: 8°F below the seasonal normal for this latitude
- Last frost: June 6 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Herron
- Tue83°58°30%
- Wed62°50°21%
- Thu63°50°40%
- Fri72°46°5%
- Sat80°54°37%
- Sun64°50°37%
- Mon74°46°10%
- Tue87°55°4%
- Wed91°64°18%
- Thu75°58°21%
- Fri61°54°23%
- Sat71°49°23%
- Sun74°52°24%
- Mon74°51°26%
- Tue85°54°20%
- Wed96°63°20%
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 — Herron
SPC has placed Herron in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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 Herron
- 59501