Weather Forecast Accuracy Last Month (September)

Weather Forecast Accuracy Last Year (2020)

Weather Changeability for Grafton, Illinois

Average change in

Temperature

Average change in high temperature day-to-day

Last Month:

3.4°

Last Year:

6.5°

Average change in low temperature day-to-day

Last Month:

6.5°

Last Year:

6.1°

Average change in

Precipitation

Chance of dry day after a precip day

Last Month:

100%

Last Year:

56%

Chance of precip day after a dry day

Last Month:

18%

Last Year:

20%

ForecastAdvisor Fact

6.2% of Weather News's low temperature forecasts for Grafton were off by more than 10 degrees last year.

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