Mason City, Nebraska Weather
Prairie lightning bugs rise. Day 76 of spring. Read this microseason across nine climate regions →
Mason City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Thunderstorm17%—82°64°—
- ThursdayJun 4Light Drizzle33%0.04″78°62°-4°
- FridayJun 5Foggy23%—85°64°+7°
- SaturdayJun 6Overcast21%—87°63°+2°
- SundayJun 7Light Drizzle20%—82°65°-5°
- MondayJun 8Showers30%0.20″89°62°+7°
- TuesdayJun 9Thunderstorm30%0.41″89°63°0°
Ozone at AQI 50 — peak already passed at 1 PM under partly cloudy skies. AQI up 10 over the last 6 hours (gradual rise). 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 50 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 50
- UV peak
- 1.3 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 50
PM × Wind × Precip
PM2.5 at 7.6 µg/m³, PM10 at 8.9 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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:35 AM
- Moonset
- 1:32 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Mason City at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 23 (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 3, 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 — Mason City
SPC has placed Mason City in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWMRGLMarginal Risk
- DAY 3MRGLMarginal 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.