5-day weather forecast for Altamont, Illinois
Today
54°
73°
Mostly cloudy
Saturday
59°
77°
Partly Cloudy
Sunday
60°
81°
Chance Thunderstorms
Monday
56°
80°
Chance Thunderstorms
Tuesday
55°
76°
Partly Cloudy
Click on a forecast to see the forecast trend for that day
Weather forecast accuracy for Lerna, Illinois
| National Weather Service | 78.68% |
| NWS Digital Forecast | 75.62% |
| Accuweather | 72.55% |
| The Weather Channel | 72.20% |
| Intellicast | 71.85% |
| MyForecast | 71.64% |
| 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
11.2% of NWS Digital Forecast's high temperature forecasts for Lerna were exactly right last year.