Bartlett, IL Weather & Growing Conditions
Tonight
62°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph E | 52% |
| Saturday | 76°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 88% |
| Saturday Night | 63°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NE | 80% |
| Sunday | 68°F | Showers And Thunderstorms | 10 to 15 mph NE | 80% |
| Sunday Night | 55°F | Rain Showers Likely | 15 mph ENE | 56% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 46% |
| Monday Night | 51°F | Chance Rain Showers | 10 to 15 mph ENE | 33% |
| Tuesday | 62°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 16% |
| Wednesday | 65°F | Partly Sunny | 5 to 10 mph NNE | 9% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph NNE | 3% |
| Friday | 70°F | Mostly Sunny | 5 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Bartlett, IL
Last spring frost
Apr 30
First fall frost
Oct 13
Growing season
163 days
Hardiness zone
5b
Explore more for Bartlett, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Streamwood, Il (3.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.