Weather Forecast Accuracy Last Month (December)

Weather Forecast Accuracy Last Year (2022)

Weather Changeability for Portland, Oregon

Average change in

Temperature

Average change in high temperature day-to-day

Last Month:

5.4°

Last Year:

4.8°

Average change in low temperature day-to-day

Last Month:

5.5°

Last Year:

4.1°

Average change in

Precipitation

Chance of dry day after a precip day

Last Month:

31%

Last Year:

34%

Chance of precip day after a dry day

Last Month:

40%

Last Year:

18%

ForecastAdvisor Fact

On average, Weather Underground's low temperature forecasts for Portland were off by 2.11 degrees last year.

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