Average change in
Temperature
Average change in high temperature day-to-day
Last Month:
4.5°
Last Year:
4.9°
Average change in low temperature day-to-day
Last Month:
4.7°
Last Year:
5.6°
Average change in
Precipitation
Chance of dry day after a precip day
Last Month:
47%
Last Year:
61%
Chance of precip day after a dry day
Last Month:
44%
Last Year:
24%
ForecastAdvisor Fact
0.1% of The Weather Channel's low temperature forecasts for Portsmouth were off by more than 10 degrees last year.