Today
Sun, Jun 21
Thunderstorm
80°67°
- Rain chance
- 91%
- Precip
- 0.3 in
- Max wind
- 10 mph
Affton air quality
Missouri, United States · Chicago time · 38.55°, -90.33°
Current conditions · 7:00 PM local
Current conditions in Affton
79°F
Thunderstorm
Feels like 85°F
- Humidity
- 80%
- Wind
- 7 mph WSW
- Gusts
- 19 mph
- UV index
- 1.45
- Visibility
- 11.5 mi
Air quality
46
Good
US AQI · European AQI 26
Air quality in Affton is currently good, with a US AQI of 46 (European AQI 26). The dominant pollutant right now is ozone. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 5.5 µg/m³.
Pollutants
- PM2.5
- 5.5 µg/m³
- PM10
- 6 µg/m³
- Ozone (O₃)
- 64 µg/m³
- NO₂
- 3.7 µg/m³
- SO₂
- 1.2 µg/m³
- CO
- 139 µg/m³
- Dust
- 1 µg/m³
AQI computed from the CAMS air quality model via Open-Meteo. Bands follow the US EPA scale.
Right now
Conditions in Affton at the moment: thunderstorm, 26 °C. It feels warmer than it reads, more like 29 °C. Wind is from the WSW at 11 km/h, gusting to 30 km/h. Humidity stands at 80% with sea-level pressure near 1006 hPa.
At a glance
Today
80° / 67°Thunderstorm · rain likely (91%)
Tomorrow
72° / 62°Overcast
Upcoming · to Saturday
96° / 59°Highs 96°, lows 59°. The most active day looks like Saturday, when rain chances peak at 52%.
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Next 3 days
Today looks like thunderstorm; temperatures run from 20 °C up to 27 °C. Rain chance peaks at 91% with around 7.1 mm possible. Gusts may reach 49 km/h from the SSW. Expect overcast tomorrow, between 16 °C and 22 °C. Expect overcast Tuesday, between 15 °C and 28 °C.
Tomorrow
Mon, Jun 22
Overcast
72°62°
- Rain chance
- 4%
- Precip
- 0 in
- Max wind
- 9 mph
Tuesday
Tue, Jun 23
Overcast
82°59°
- Rain chance
- 3%
- Precip
- 0 in
- Max wind
- 7 mph
Next 48 hours
- 12 AM72°0%2 mph
- 1 AM70°0%4 mph
- 2 AM68°0%2 mph
- 3 AM68°0%2 mph
- 4 AM69°1%2 mph
- 5 AM68°1%3 mph
- 6 AM67°1%3 mph
- 7 AM69°1%4 mph
- 8 AM71°1%6 mph
- 9 AM74°2%8 mph
- 10 AM75°5%8 mph
- 11 AM76°14%10 mph
- 12 PM76°42%5 mph
- 1 PM75°79%10 mph
- 2 PM73°91%9 mph
- 3 PM76°69%7 mph
- 4 PM79°43%7 mph
- 5 PM80°42%10 mph
- 6 PM80°37%9 mph
- 7 PM79°29%7 mph
- 8 PM75°23%8 mph
- 9 PM74°13%4 mph
- 10 PM73°9%9 mph
- 11 PM71°6%6 mph
- 12 AM68°2%6 mph
- 1 AM65°0%8 mph
- 2 AM63°2%7 mph
- 3 AM62°0%7 mph
- 4 AM63°0%8 mph
- 5 AM62°0%9 mph
- 6 AM62°1%7 mph
- 7 AM62°1%7 mph
- 8 AM63°1%9 mph
- 9 AM64°1%5 mph
- 10 AM66°2%6 mph
- 11 AM67°2%7 mph
- 12 PM67°2%9 mph
- 1 PM69°2%8 mph
- 2 PM71°3%7 mph
- 3 PM71°3%6 mph
- 4 PM72°3%7 mph
- 5 PM69°4%3 mph
- 6 PM72°4%7 mph
- 7 PM71°4%5 mph
- 8 PM69°4%4 mph
- 9 PM67°3%4 mph
- 10 PM65°3%4 mph
- 11 PM64°3%3 mph
In depth
The weather picture for Affton opens with thunderstorm; it's 26 °C out, feeling like 29 °C. Today's forecast calls for thunderstorm, topping out near 27 °C before falling back to 20 °C overnight. Winds blow mainly from the SSW around 16 km/h, with gusts up to 49 km/h. A warming trend takes daytime highs from 22 to 35 °C over the coming week. Rain is in the picture on today, Wednesday, Thursday and beyond, with roughly 24 mm expected in total across the week. Tomorrow brings overcast with a high of 22 °C and a 4% chance of precipitation. The UV index reaches 6 today, so sun protection is sensible during the middle of the day. Sunrise comes at 05:37 and sunset at 20:28, giving 14.9 hours of daylight. Current humidity sits at 80% with pressure near 1006 hPa. Looking further out, Thursday shows thunderstorm with a high around 30 °C, while Saturday ends the week at 35 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
Sun & UV
- Sunrise
- 5:37 AM
- Sunset
- 8:28 PM
- Daylight
- 14h 52m
- Max UV
- 6.3 High
Wind
- Wind
- 7 mph
- Gusts
- 19 mph
- Direction
- WSW (253°)
Farming weather
Soil temperatures today read surface 21.3 °C, 6 cm 22.4 °C, 18 cm 22.7 °C, 54 cm 21.1 °C. Soil moisture sits at 0-1 cm at 0.32 m³/m³, 3-9 cm at 0.32 m³/m³, 27-81 cm at 0.29 m³/m³. For maize, the root-zone reading is within the ideal 0.2-0.35 m³/m³ band. Forecast rain (24 mm) roughly covers crop water demand (ET0 28 mm), so irrigation can likely be paused. A suitable spraying window opens around 06:00 on 2026-06-21, with winds at or below 15 km/h and no rain expected. Heat stress is likely for maize with highs reaching 35 °C (threshold 35 °C). Heat stress is likely for wheat with highs reaching 35 °C (threshold 32 °C). Projected growing degree days over the next week: maize 91, wheat 130.
- Topsoil moisture
- 0.237 m³/m³
- Soil temp
- 68°F
- ET₀ today
- 2.58 mm
- Spray window
- ~5:00
- Rain (next 7d)
- 0.9 in
- Wind
- 7 mph
- Humidity
- 80%
Advisory summary
No weather alert thresholds are crossed for Affton in the current forecast (derived from forecast data, not official warnings). Conditions may still change — check back for updates.
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All data for Affton
| Variable | Value |
|---|---|
| City | Affton, Missouri, United States |
| Coordinates | 38.55061, -90.33317 |
| Elevation | 188 m |
| Timezone | America/Chicago |
| Population | 20,307 |
| Observed at (local) | 7:00 PM |
| Temperature (2 m) | 79°F |
| Apparent temperature | 85°F |
| Relative humidity (2 m) | 80% |
| Dew point (2 m) | 72°F |
| Precipitation (last hour) | 0 in |
| Rain | 0 in |
| Showers | 0 in |
| Snowfall | 0 in |
| Weather code (WMO) | 95 |
| Cloud cover | 100% |
| Surface pressure | 29.1 inHg |
| Sea-level pressure | 29.7 inHg |
| Wind speed (10 m) | 7 mph |
| Wind gusts (10 m) | 19 mph |
| Wind direction (10 m) | 253° (WSW) |
| Visibility | 11.5 mi |
| UV index | 1.45 |
| Day / night | Day |
| Today max / min | 80°F / 67°F |
| Today feels-like max / min | 85°F / 70°F |
| Today precipitation sum | 0.3 in |
| Today rain sum | 0.3 in |
| Today snowfall sum | 0 in |
| Today max precip probability | 91% |
| Today max wind / gusts | 10 mph / 31 mph |
| Dominant wind direction | 196° (SSW) |
| Sunrise / sunset | 5:37 AM / 8:28 PM |
| Daylight duration | 14h 52m |
| Sunshine duration | 4h 56m |
| Max UV index | 6.3 |
| Reference evapotranspiration (ET₀) | 2.58 mm |
| Topsoil moisture (0–1 cm) | 0.237 m³/m³ |
| Surface soil temperature | 68°F |
| US AQI | 46 |
| European AQI | 26 |
| PM2.5 | 5.5 µg/m³ |
| PM10 | 6 µg/m³ |
| Ozone (O₃) | 64 µg/m³ |
| Nitrogen dioxide (NO₂) | 3.7 µg/m³ |
| Sulphur dioxide (SO₂) | 1.2 µg/m³ |
| Carbon monoxide (CO) | 139 µg/m³ |
| Dust | 1 µg/m³ |
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<iframe src="https://weathertomorrow.cloud/embed/city/us/missouri/affton" width="320" height="180" frameborder="0" title="Affton weather" loading="lazy"></iframe>Frequently asked questions
Will it rain in Affton tomorrow?
Rain is unlikely in Affton tomorrow; the precipitation chance stays around 4%.
What is the temperature in Affton today?
Today Affton sees thunderstorm with a high of 27 °C and a low of 20 °C.
How hot will it be in Affton tomorrow?
Tomorrow's high in Affton is forecast at 22 °C with overcast.
Is it windy in Affton today?
Yes, yes — gusts up to 49 km/h today.
What is the UV index in Affton today?
The UV index peaks at 6 today, which is high.
What time is sunrise and sunset in Affton today?
The sun rises at 05:37 and sets at 20:28 local time.
Is the air quality in Affton good today?
Air quality is good right now, with a US AQI reading of 46.