St. Martins, Missouri Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
St. Martins weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle24%—92°74°—
- SundayJul 5Light Drizzle25%—88°70°-4°
- MondayJul 6Overcast10%—84°68°-4°
- TuesdayJul 7Clear——85°64°+1°
- WednesdayJul 8Clear——92°66°+7°
- ThursdayJul 9Light Drizzle27%—89°71°-3°
- FridayJul 10Light Drizzle48%—89°72°0°
AQI 50 (Good), driven by PM2.5. AQI up 5 over the last 6 hours (gradual rise). PM2.5 at 9.6 µg/m³, PM10 at 12.2 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 44 now. With UV 8.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 49 around 1 PM.
- Present
- AQI 44
- UV peak
- 8.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 49
PM × Wind × Precip
PM2.5 at 9.6 µg/m³, PM10 at 12.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.79
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:02 PM
- Moonset
- 10:17 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
St. Martins at a glance
- Today vs. normal: 18°F above the seasonal normal for this latitude
- Last frost: April 8 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — St. Martins
- Sat92°74°24%
- Sun88°70°25%
- Mon84°68°10%
- Tue85°64°7%
- Wed92°66°7%
- Thu89°71°27%
- Fri89°72°48%
- Sat77°63°23%
- Sun80°60°8%
- Mon80°58°6%
- Tue79°59°9%
- Wed86°59°10%
- Thu88°63°10%
- Fri89°67°16%
- Sat78°68°16%
- Sun79°65°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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. Martins
SPC has placed St. Martins in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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. Martins
- 65109