Bartlett, IL Weather & Growing Conditions
Overnight
59°F
Rain
Rain. Cloudy. Low around 59, with temperatures rising to around 61 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Rain | 15 mph S | 87% |
| Wednesday | 62°F | Chance Rain then Rain Showers Likely | 15 mph SSW | 59% |
| Wednesday Night | 47°F | Slight Chance Rain Showers | 15 mph SW | 20% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph WSW | 33% |
| Thursday Night | 42°F | Chance Rain Showers | 5 to 10 mph WNW | 39% |
| Friday | 51°F | Chance Rain Showers | 10 to 15 mph N | 26% |
| Friday Night | 36°F | Mostly Cloudy | 5 to 10 mph NNW | 6% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 7% |
| Saturday Night | 34°F | Partly Cloudy | 0 to 5 mph WSW | 6% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 16% |
| Sunday Night | 36°F | Mostly Clear | 5 mph WNW | 7% |
| Monday | 59°F | Sunny | 5 to 10 mph WSW | 3% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph W | 2% |
| Tuesday | 61°F | Sunny | 5 to 10 mph WNW | 1% |
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 Nov 4, 2026.