St. Marys, Kansas Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
St. Marys weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Foggy——87°64°—
- MondayJul 6Clear——90°70°+3°
- TuesdayJul 7Overcast——89°68°-1°
- WednesdayJul 8Overcast16%—103°68°+14°
- ThursdayJul 9Overcast43%—89°73°-14°
- FridayJul 10Drizzle39%—79°68°-10°
- SaturdayJul 11Overcast15%—87°66°+8°
AQI 33 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM2.5 at 12.3 µg/m³ (AQI 57) with a 0.88 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 3 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 12.3 µg/m³ (AQI 57) with a 0.88 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.88
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 11:42 PM
- Moonset
- 11:38 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
St. Marys at a glance
- Today vs. normal: 8°F below the seasonal normal for this latitude
- Last frost: April 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — St. Marys
- Sun87°64°2%
- Mon90°70°1%
- Tue89°68°2%
- Wed103°68°16%
- Thu89°73°43%
- Fri79°68°39%
- Sat87°66°15%
- Sun90°70°6%
- Mon93°71°2%
- Tue102°72°4%
- Wed96°71°5%
- Thu98°69°14%
- Fri95°70°17%
- Sat93°69°16%
- Sun98°74°16%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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. Marys
SPC includes St. Marys in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
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 St. Marys
- 66536