Ulm, Montana Weather
Pikas hayfeeding in granite peaks. Day 78 of spring. Read this microseason across nine climate regions →
Ulm weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast15%—77°52°—
- FridayJun 5Overcast——78°48°+1°
- SaturdayJun 6Drizzle19%—73°52°-5°
- SundayJun 7Heavy Drizzle44%0.06″60°46°-13°
- MondayJun 8Heavy Drizzle18%0.06″74°43°+14°
- TuesdayJun 9Light Drizzle45%0.06″66°50°-8°
- WednesdayJun 10Light Drizzle51%0.08″67°53°+1°
Ozone at AQI 41 now. AQI up 14 over the last 6 hours (gradual rise). With UV 0.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.
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 41 now. With UV 0.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.
- Present
- AQI 41
- UV peak
- 0.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 5.0 µg/m³, PM10 at 6.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 6:50 AM
- Moonset
- 4:17 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
Ulm at a glance
- Today vs. normal: 69°F — typical for the season
- Last frost: May 31 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Warm-season window is open
As of June 5, 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 — Ulm
SPC has placed Ulm in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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.