Upper Alton weather
At 7:15 PM local time it was cloudy and 17°C (63°F). Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out. Best months for weather: Apr–Oct. Upper Alton sits 170 m (558 ft) above sea level, which keeps it cooler than the coast. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Upper Alton, Illinois, United States.
Current conditions
- Clouds
- 100%
- Chance of rain
- 2%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season Apr–OctOff season Dec–Feb
About Upper Alton weather
Is it raining in Upper Alton right now?
No. It’s cloudy and 17° right now. Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out.
What’s the weather like in Upper Alton this week?
Over the next 7 days, expect highs of 12–24° and lows of 9–18°. Rain is likely on 4 of 7 days (Monday, Tuesday, Wednesday, Thursday). The driest day looks like Monday.
Has it been raining in Upper Alton lately?
Barely. The past 7 days were mostly dry, with 0.0 mm of rain in total.
What should I pack for Upper Alton?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Upper Alton weather by month
When is the best time to visit Upper Alton?
Based on weather alone, the best time to visit Upper Alton is Apr–Oct, according to NASA's 2001–2025 climate averages. Dec–Feb tends to be the least pleasant. Average highs run from 3°C (37°F) in January to 31°C (87°F) in July.
What is the rainiest month in Upper Alton?
May is the wettest month, with about 127 mm (5.0 in) of rain on average. February is the driest, with about 60 mm (2.4 in).
What is the hottest month in Upper Alton?
July is the warmest, with average highs of 31°C (87°F) and lows of 20°C (68°F). January is the coolest, with highs of 3°C (37°F) and lows of -6°C (20°F).
Does Upper Alton have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is May at about 127 mm (5.0 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months