St. Ann, Missouri Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
St. Ann weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast16%—94°78°—
- SundayJul 5Showers26%0.40″81°72°-13°
- MondayJul 6Overcast26%—90°70°+9°
- TuesdayJul 7Overcast——88°70°-2°
- WednesdayJul 8Overcast——97°71°+9°
- ThursdayJul 9Light Drizzle32%—97°78°0°
- FridayJul 10Thunderstorm46%—92°74°-5°
AQI 49 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.5 µg/m³, PM10 at 12.4 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 47. Overcast through the UV peak window (cloud cover ~71%) — afternoon ozone should stay flat.
- Present
- AQI 47
- UV peak
- 5.7 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 18
PM × Wind × Precip
PM2.5 at 11.5 µg/m³, PM10 at 12.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.93
- Wind
- light
- 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
- 10:54 PM
- Moonset
- 10:09 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
St. Ann at a glance
- Today vs. normal: 15°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. Ann
- Sat94°78°16%
- Sun81°72°26%
- Mon90°70°26%
- Tue88°70°5%
- Wed97°71°9%
- Thu97°78°32%
- Fri92°74°46%
- Sat90°76°23%
- Sun81°66°7%
- Mon80°61°7%
- Tue82°64°10%
- Wed88°68°10%
- Thu87°70°10%
- Fri82°70°9%
- Sat88°73°14%
- Sun94°76°16%
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. Ann
SPC has placed St. Ann 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. Ann
- 63074