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Upper Alton, United States Snapshot 2026
Where is Upper Alton?
Upper Alton, United States
- Continent
- Americas
- Country
- United States
- City
- Upper Alton
- Population
- 29.3K
- Elevation
- 166 m
- Coordinates
- 38.91°, -90.15°
Upper Alton is a city in United States with a population of approximately 29.3K. Average temperatures range from -3°C (26°F) in January to 31°C (87°F) in July. The best time to visit is May, June, August, September, October. The city sits at an elevation of 166 m above sea level.
Time in Upper Alton right now
Open full time & time zone page 16:12 12
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 Upper Alton
Daylight in Upper Alton today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 53m
Climate normals for Upper Alton
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 | 4°C / -3°C | 0°C / -8°C | 9days (68 mm) Wet | 5.4h Fair | 69% Muggy | 2.7 Moderate | Poor | View Details |
| February | 8°C / -2°C | 5°C / -6°C | 8days (65 mm) Wet | 6.8h Fair | 67% Muggy | 3.8 Moderate | Poor | View Details |
| March | 14°C / 4°C | 11°C / 0°C | 12days (113 mm) Wet | 7.5h Good | 65% Muggy | 5.1 High | Fair | View Details |
| April | 19°C / 9°C | 18°C / 6°C | 12days (121 mm) Wet | 9h Good | 64% Muggy | 5.8 High | Good | View Details |
| May best | 24°C / 15°C | 25°C / 14°C | 12days (127 mm) Wet | 9.9h Good | 70% Muggy | 6.9 High | Excellent | View Details |
| June best | 30°C / 20°C | 32°C / 21°C | 10days (91 mm) Wet | 11.9h Excellent | 67% Muggy | 7.3 Very High | Excellent | View Details |
| July | 31°C / 22°C | 35°C / 25°C | 12days (114 mm) Wet | 11.8h Excellent | 72% Muggy | 7.3 Very High | Fair | View Details |
| August best | 29°C / 21°C | 33°C / 23°C | 10days (104 mm) Wet | 10.9h Excellent | 72% Muggy | 6.8 High | Excellent | View Details |
| September best | 27°C / 18°C | 29°C / 19°C | 7days (72 mm) Good | 10.2h Excellent | 68% Muggy | 5.8 High | Excellent | View Details |
| October best | 21°C / 12°C | 19°C / 10°C | 9days (80 mm) Wet | 7.8h Good | 66% Muggy | 4.3 Moderate | Good | View Details |
| November | 13°C / 4°C | 10°C / 1°C | 7days (70 mm) Good | 6.7h Fair | 68% Muggy | 3 Moderate | Fair | View Details |
| December | 8°C / 0°C | 4°C / -5°C | 8days (54 mm) Wet | 5.6h Fair | 71% Muggy | 2.3 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 4°C / -3°C . Feb: 8°C / -2°C . Mar: 14°C / 4°C . Apr: 19°C / 9°C . May: 24°C / 15°C . Jun: 30°C / 20°C . Jul: 31°C / 22°C . Aug: 29°C / 21°C . Sep: 27°C / 18°C . Oct: 21°C / 12°C . Nov: 13°C / 4°C . Dec: 8°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 68 mm. Feb: 65 mm. Mar: 113 mm. Apr: 121 mm. May: 127 mm. Jun: 91 mm. Jul: 114 mm. Aug: 104 mm. Sep: 72 mm. Oct: 80 mm. Nov: 70 mm. Dec: 54 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 67%. Mar: 65%. Apr: 64%. May: 70%. Jun: 67%. Jul: 72%. Aug: 72%. Sep: 68%. Oct: 66%. Nov: 68%. Dec: 71%.
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: 14 km/h . Oct: 17 km/h . Nov: 18 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 7. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Upper Alton has a population of approximately 29.3K.
The best months to visit Upper Alton are May, June, August, September, October, when temperatures are pleasant and rainfall is lower.
Upper Alton receives approximately 1079mm of rainfall annually across 116 rainy days.
Upper Alton is located in United States, in the Americas region.
Upper Alton sits at an elevation of 166 m (545 ft) above sea level.