Mount Vernon weather
At 8:00 PM local time it was cloudy and 17°C (62°F). Light rain for 2 of the next 24 hours (under 1 mm/h, 1.3 mm total) — cloudy, but fine to be out. Best months for weather: Apr–Oct. Mount Vernon sits 158 m (518 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 Mount Vernon, Illinois, United States.
Current conditions
- Clouds
- 100%
- Chance of rain
- 4%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 2 of the next 24 hours (under 1 mm/h, 1.3 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season Apr–OctOff season Dec–Feb
About Mount Vernon weather
Is it raining in Mount Vernon right now?
No. It’s cloudy and 17° right now. Light rain for 2 of the next 24 hours (under 1 mm/h, 1.3 mm total) — cloudy, but fine to be out.
What’s the weather like in Mount Vernon this week?
Over the next 7 days, expect highs of 12–26° and lows of 11–19°. Rain is likely on 5 of 7 days (Sunday, Tuesday, Wednesday, Thursday, Friday). The driest day looks like Monday.
Has it been raining in Mount Vernon lately?
Barely. The past 7 days were mostly dry, with 0.0 mm of rain in total.
What should I pack for Mount Vernon?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Mount Vernon weather by month
When is the best time to visit Mount Vernon?
Based on weather alone, the best time to visit Mount Vernon is Apr–Oct, according to NASA's 2001–2025 climate averages. Dec–Feb tends to be the least pleasant. Average highs run from 4°C (38°F) in January to 30°C (87°F) in July.
What is the rainiest month in Mount Vernon?
May is the wettest month, with about 123 mm (4.8 in) of rain on average. February is the driest, with about 68 mm (2.7 in).
What is the hottest month in Mount Vernon?
July is the warmest, with average highs of 30°C (87°F) and lows of 20°C (69°F). January is the coolest, with highs of 4°C (38°F) and lows of -5°C (22°F).
Does Mount Vernon have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is May at about 123 mm (4.8 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