Decatur (IL)
Tomorrow
Tomorrow weather in Decatur
Monday, September 21st, 2026
18°
Patchy rain possible
Low 15°
The weather tomorrow in Decatur will be much colder than today, with max temperatures up to 17°.
The rain is expected to get stronger, the expected precipitation are 5 mm.
The wind tomorrow will get lighter comparing to today but still be strong and reach over 22 km/h.
18° / 15°
Temp
89%
Rain
22 km/h
Wind
93%
Humidity
Decatur Weather Pages
Decatur hourly forecast for tomorrow
Scroll right to see more weather forecasts for Decatur tomorrow
| 12:00 AM | 01:00 AM | 02:00 AM | 03:00 AM | 04:00 AM | 05:00 AM | 06:00 AM | 06:42 AM | 07:00 AM | 08:00 AM | 09:00 AM | 10:00 AM | 11:00 AM | 12:00 PM | 01:00 PM | 02:00 PM | 03:00 PM | 04:00 PM | 05:00 PM | 06:00 PM | 06:55 PM | 07:00 PM | 08:00 PM | 09:00 PM | 10:00 PM | 11:00 PM | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  |  | |  | | | |  | | | | | | | | | | | | |  | | | | | | Next |
| temperatures | 17.5° | 17.7° | 17.5° | 17.4° | 17.4° | 17° | 16.8° | Sunrise | 16.5° | 16.2° | 16.3° | 16.4° | 16.6° | 16.4° | 15.7° | 16.9° | 16.2° | 16.2° | 16.1° | 15.7° | Sunset | 15° | 14.8° | 15° | 14.9° | 14.6° | |
| Feels like | 16.8° | 16.5° | 15.8° | 16.6° | 18° | 16.4° | 15.8° | 14.9° | 15° | 15.2° | 15.1° | 16.2° | 15.2° | 13.1° | 15.4° | 15° | 15.4° | 14.9° | 13.9° | 12.9° | 13° | 13.3° | 12.9° | 12.5° | |||
| wind speed | 16 km/h | 18 km/h | 20 km/h | 16 km/h | 8 km/h | 14 km/h | 16 km/h | 18 km/h | 15 km/h | 15 km/h | 16 km/h | 12 km/h | 16 km/h | 22 km/h | 16 km/h | 14 km/h | 12 km/h | 14 km/h | 17 km/h | 17 km/h | 15 km/h | 15 km/h | 16 km/h | 16 km/h | |||
| wind degree | 49° | 56° | 65° | 54° | 73° | 71° | 65° | 62° | 50° | 50° | 60° | 50° | 48° | 79° | 82° | 66° | 55° | 57° | 39° | 46° | 53° | 57° | 63° | 64° | |||
| wind direction | NE | ENE | ENE | NE | ENE | ENE | ENE | ENE | NE | NE | ENE | NE | NE | E | E | ENE | NE | ENE | NE | NE | NE | ENE | ENE | ENE | |||
| Precipitation | 0 mm | 0 mm | 0 mm | 0.1 mm | 0.4 mm | 0.1 mm | 0.6 mm | 1.2 mm | 0.4 mm | 0.1 mm | 0.3 mm | 0.9 mm | 0.6 mm | 0.1 mm | 0 mm | 0.1 mm | 0.1 mm | 0.1 mm | 0.1 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | |||
| chance for rain | 32% | 33% | 33% | 41% | 61% | 45% | 69% | 78% | 59% | 41% | 51% | 74% | 67% | 44% | 31% | 36% | 39% | 37% | 40% | 31% | 31% | 31% | 32% | 32% | |||
| chance for snow | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |||
| humidity | 95% | 94% | 94% | 94% | 94% | 95% | 96% | 96% | 96% | 95% | 94% | 93% | 94% | 95% | 90% | 91% | 91% | 91% | 92% | 92% | 92% | 92% | 92% | 91% | |||
| dew point | 16.7° | 16.7° | 16.6° | 16.4° | 16.5° | 16.2° | 16.1° | 15.9° | 15.5° | 15.5° | 15.5° | 15.5° | 15.5° | 15° | 15.2° | 14.7° | 14.7° | 14.6° | 14.4° | 13.8° | 13.6° | 13.7° | 13.6° | 13.2° | |||
| visibility | 10 km | 9 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | |||
| cloud cover | 98% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 99% | 100% | 98% | 100% | 100% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0.4 | 0.8 | 2.2 | 2.1 | 1.2 | 1.6 | 1.2 | 0.5 | 0.2 | 0.1 | 0 | 0 | 0 | 0 | 0 |
Weather in Decatur tomorrow
The weather in Decatur tomorrow is expected to be much cooler than usual, with a forecast temperature of 18 °F, compared to an average of 27 °F for September 21st in recent years.
temperatures
18 °F
rain
5.2 mm
wind
22 km/h
UV
Low
Decatur daylight overview ☀️
Tomorrow in Decatur, The sun rises at 06:42 and sets at 18:55, giving a total daylight duration of 12 hours and 13 minutes.
Quick links
More Decatur weather pages
What to wear tomorrow in Decatur? clothing recommendations
Stay comfortably stylish - your tailored guide for tomorrow's Decatur forecast.
Long-sleeve shirt
Long pant
Closed-toe shoes
Light jacket
Umbrella
The weather tomorrow in Decatur - FAQ
What is the maximum temperature for tomorrow in Decatur?
The maximum temperature for tomorrow in Decatur is expected to be 18° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain tomorrow in Decatur? 🌧️
Yes, there is a 89% chance of rain in Decatur tomorrow. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed tomorrow in Decatur? 🌀
The wind in Decatur is expected to blow at 22 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in Decatur tomorrow?
Given the forecast of 18 °F with a 89% chance of rain, we advise checking our "What to wear tomorrow" section for recommendations. There, you will find tailored advice to help you stay comfortable and prepared for the weather conditions in Decatur tomorrow.
What is the sunrise and sunset time for Decatur tomorrow?
The sun is expected to rise at 06:42 and set at 18:55 in Decatur.
How accurate is the weather forecast Decatur tomorrow? ✅
Decatur weather forecast for tomorrow is based on the most current and sophisticated meteorological models available. While we strive for accuracy, weather conditions can change unexpectedly, so we recommend checking for updates regularly.
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