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Affton, United States Snapshot 2026
Where is Affton?
Affton, United States
- Continent
- Americas
- Country
- United States
- City
- Affton
- Population
- 20.3K
- Elevation
- 188 m
- Coordinates
- 38.55°, -90.33°
Affton is a city in United States with a population of approximately 20.3K. Average temperatures range from -3°C (26°F) in January to 31°C (88°F) in July. The best time to visit is May, June, August, September, October. The city sits at an elevation of 188 m above sea level.
Time in Affton right now
Open full time & time zone page 12:45 45
Monday, June 15, 2026
IANA time zone
America/Chicago
Daylight saving
DST in effect
CST / CDT
Next DST change
November 1
backward -1h
Live weather in Affton
Daylight in Affton today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 51m
Climate normals for Affton
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Fair April
Good May best
Excellent June best
Excellent July
Fair August best
Excellent September best
Excellent October best
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -3°C | 1°C / -8°C | 8days (78 mm) Wet | 5.6h Fair | 69% Muggy | 2.7 Moderate | Poor | View Details |
| February | 9°C / -2°C | 5°C / -6°C | 8days (71 mm) Wet | 7h Good | 66% Muggy | 3.7 Moderate | Poor | View Details |
| March | 15°C / 4°C | 12°C / 0°C | 12days (120 mm) Wet | 7.6h Good | 65% Muggy | 5.2 High | Fair | View Details |
| April | 19°C / 8°C | 18°C / 6°C | 11days (134 mm) Wet | 9h Good | 65% Muggy | 5.8 High | Good | View Details |
| May best | 24°C / 15°C | 25°C / 14°C | 14days (129 mm) Wet | 10h Excellent | 71% Muggy | 7.1 Very High | Excellent | View Details |
| June best | 30°C / 20°C | 33°C / 21°C | 10days (87 mm) Wet | 12h Excellent | 67% Muggy | 7.4 Very High | Excellent | View Details |
| July | 31°C / 22°C | 35°C / 25°C | 13days (107 mm) Wet | 12h Excellent | 71% Muggy | 7.5 Very High | Fair | View Details |
| August best | 30°C / 21°C | 33°C / 23°C | 10days (114 mm) Wet | 11h Excellent | 72% Muggy | 6.8 High | Excellent | View Details |
| September best | 28°C / 18°C | 29°C / 18°C | 7days (80 mm) Good | 10.2h Excellent | 68% Muggy | 5.9 High | Excellent | View Details |
| October best | 21°C / 11°C | 20°C / 9°C | 8days (84 mm) Wet | 7.9h Good | 66% Muggy | 4.3 Moderate | Good | View Details |
| November | 13°C / 4°C | 10°C / 1°C | 8days (70 mm) Wet | 6.9h Fair | 68% Muggy | 3 Moderate | Fair | View Details |
| December | 8°C / 0°C | 5°C / -4°C | 8days (64 mm) Wet | 5.7h Fair | 70% Muggy | 2.3 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 5°C / -3°C . Feb: 9°C / -2°C . Mar: 15°C / 4°C . Apr: 19°C / 8°C . May: 24°C / 15°C . Jun: 30°C / 20°C . Jul: 31°C / 22°C . Aug: 30°C / 21°C . Sep: 28°C / 18°C . Oct: 21°C / 11°C . Nov: 13°C / 4°C . Dec: 8°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 78 mm. Feb: 71 mm. Mar: 120 mm. Apr: 134 mm. May: 129 mm. Jun: 87 mm. Jul: 107 mm. Aug: 114 mm. Sep: 80 mm. Oct: 84 mm. Nov: 70 mm. Dec: 64 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 66%. Mar: 65%. Apr: 65%. May: 71%. Jun: 67%. Jul: 71%. Aug: 72%. Sep: 68%. Oct: 66%. Nov: 68%. Dec: 70%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 19 km/h . Mar: 20 km/h . Apr: 20 km/h . May: 17 km/h . Jun: 15 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 17 km/h . Nov: 17 km/h . Dec: 18 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Affton has a population of approximately 20.3K.
The best months to visit Affton are May, June, August, September, October, when temperatures are pleasant and rainfall is lower.
Affton receives approximately 1138mm of rainfall annually across 117 rainy days.
Affton is located in United States, in the Americas region.
Affton sits at an elevation of 188 m (617 ft) above sea level.