Latham, IL Weather & Growing Conditions
Overnight
70°F
Mostly Cloudy
Mostly cloudy, with a low around 70. South southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Mostly Cloudy | 6 mph SSW | 9% |
| Sunday | 84°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 12 mph NNE | 54% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 12 to 16 mph NE | 63% |
| Monday | 70°F | Showers And Thunderstorms Likely | 15 mph ENE | 37% |
| Monday Night | 56°F | Chance Rain Showers | 12 to 15 mph NE | 17% |
| Tuesday | 67°F | Chance Rain Showers | 16 mph NE | 17% |
| Tuesday Night | 52°F | Mostly Cloudy | 7 to 14 mph NNE | 5% |
| Wednesday | 69°F | Mostly Sunny | 10 to 14 mph NNE | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 6 to 13 mph NE | 0% |
| Thursday | 71°F | Mostly Sunny | 6 to 9 mph NE | 0% |
| Thursday Night | 53°F | Mostly Cloudy | 5 to 9 mph NE | 2% |
| Friday | 73°F | Partly Sunny | 5 to 9 mph NE | 2% |
| Friday Night | 51°F | Partly Cloudy | 3 to 9 mph NE | 1% |
| Saturday | 75°F | Mostly Sunny | 3 to 7 mph ENE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Latham, IL
Last spring frost
Apr 14
First fall frost
Oct 24
Growing season
192 days
Hardiness zone
6a
Explore more for Latham, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Decatur Wtp, Il (14.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.