5-day weather forecast for Altamont, Illinois
Today
57°
76°
Mostly sunny
Saturday
62°
81°
Mostly sunny
Sunday
67°
87°
Chance Thunderstorms
Monday
73°
89°
Chance Thunderstorms
Tuesday
69°
89°
Chance Thunderstorms
Click on a forecast to see the forecast trend for that day
Weather forecast accuracy for Lerna, Illinois
| MyForecast | 72.72% |
| National Weather Service | 72.29% |
| The Weather Channel | 70.20% |
| NWS Digital Forecast | 69.35% |
| Accuweather | 68.80% |
| Intellicast | 50.18% |
| The Weather Channel | 74.29% |
| Intellicast | 74.24% |
| National Weather Service | 72.63% |
| Accuweather | 69.91% |
| NWS Digital Forecast | 69.85% |
| MyForecast | 69.28% |
ForecastAdvisor Fact
9.0% of NWS Digital Forecast's high temperature forecasts for Lerna were exactly right last month.