News Normal Illinois United States September 22, 2025

Weather Analysis for Normal, Illinois: September 21 - 23, 2025

As we transition into the fall season, the city of Normal, Illinois, is set to experience a variety of weather conditions over the next few days. Let’s dive into the specifics of the weather forecast, which can help residents and visitors alike plan their activities accordingly.

Saturday, September 21 - A Warm Start to the Weekend

The weather on this day is expected to be quite pleasant, with warm temperatures reaching up to 29°C (85°F) during the day from an overnight low of 17°C (63°F). Expect a significant 12 hours of sunshine as the sun rises at 6:43 AM and sets at 6:54 PM. While the day begins overcast with a humidity level near 93%, things clear up by mid-morning, revealing mostly sunny skies by noon.

Winds will be moderate, blowing from the southeast at 12 km/h (8 mph), increasing slightly in the afternoon. Notably, the UV index will reach a low level of 1, so sunscreen isn’t a top priority but still good to be mindful of during outdoor activities. Overall, this makes for an ideal day for outdoor enthusiasts or anyone looking to enjoy the sunshine.

Sunday, September 22 - Foggy Mornings Transitioning to Clouds

As we step into Sunday, the forecast shows a cooler feel with a high of 25°C (77°F) and a morning low around 18°C (65°F). Residents should prepare for foggy conditions early in the day which may reduce visibility to as low as 2 miles. However, as the day progresses, expect the fog to dissipate, leading to overcast conditions with a chance of light rain in the afternoon.

The winds will remain light, from the south-southwest, with speeds around 11 km/h (7 mph). Humidity will be high at 98%, particularly in the morning, so it may feel a bit muggier. The UV index rises slightly to 1, which again necessitates minimal exposure precautions.

Monday, September 23 - Warming Trend with Rain Showers

For the start of the week, Monday will see temperatures rise again, peaking at 28°C (83°F) and dropping to a low of 20°C (68°F) at night. Expect a mix of clouds and occasional sunshine through the day. The likelihood of rain increases in the afternoon with light showers on the horizon.

Wind speeds will be moderate again, with gusts up to 14 km/h (9 mph) from the south-southwest. With the increased humidity levels and a gusty wind, residents may feel quite warm and sticky during the day. The UV index rises to 3, indicating a moderate risk of harm from unprotected sun exposure.

Important Highlights

• Temperature: Ranging from a low of 17°C to a high of 29°C over the three days.
• Precipitation: Light rain expected on September 22 and 23, with higher chances on the 23rd.
• Humidity Levels: High humidity, particularly in the mornings, creating a sticky feel.
• Visibility: Foggy conditions may reduce visibility significantly on September 22.
• Wind Conditions: Gentle breezes making for comfortable outdoor conditions except during wet weather.

For more information about the upcoming weather trends in Normal, check out the next 5 days weather forecast or explore the hour by hour weather details. Stay tuned for more weather updates, and enjoy this lovely late summer weather while it lasts!