5-day weather forecast for Godfrey, Illinois
Today
65°
90°
Partly sunny
Saturday
67°
96°
Mostly sunny
Sunday
73°
96°
Mostly sunny
Monday
74°
93°
Chance Thunderstorms
Tuesday
69°
85°
Slight Chance Thunderstorms
Click on a forecast to see the forecast trend for that day
Weather changeability for Grafton, Illinois
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 7.6° | 6.6° |
| Average change in low temperature day-to-day | 6.7° | 7.1° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 57% | 52% |
| Chance of precip day after a dry day | 25% | 26% |
Weather forecast accuracy for Grafton, Illinois
| The Weather Channel | 75.62% |
| Intellicast | 75.62% |
| National Weather Service | 72.84% |
| AccuWeather | 70.68% |
| CustomWeather | 67.90% |
| Weather Underground | 66.36% |
| NWS Digital Forecast | 63.27% |
| World Weather Online | 60.49% |
| Persistence | 38.89% |
| Intellicast | 68.26% |
| The Weather Channel | 68.24% |
| National Weather Service | 66.81% |
| NWS Digital Forecast | 65.82% |
| AccuWeather | 64.62% |
| CustomWeather | 64.61% |
| Persistence | 44.44% |
ForecastAdvisor Fact
4.9% of The Weather Channel's high temperature forecasts for Grafton were exactly right last month.