St. Thomas, North Dakota Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
St. Thomas weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Rain89%0.68″74°62°—
- ThursdayJun 4Foggy11%—78°58°+4°
- FridayJun 5Overcast12%—70°58°-8°
- SaturdayJun 6Overcast——83°55°+13°
- SundayJun 7Overcast50%—85°64°+2°
- MondayJun 8Heavy Drizzle56%0.01″80°63°-5°
- TuesdayJun 9Light Drizzle23%—85°58°+5°
Ozone at AQI 33 now. AQI up 5 over the last 6 hours (gradual rise). With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 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 33 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 by mid-afternoon.
- Present
- AQI 33
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 8
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
- 5:33 AM
- Moonset
- 2:02 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
St. Thomas at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: June 7 (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
Peak growing season
As of June 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 — St. Thomas
SPC has placed St. Thomas in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
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.