Average change in
Temperature
Average change in high temperature day-to-day
Last Month:
9.4°
Last Year:
7.0°
Average change in low temperature day-to-day
Last Month:
9.8°
Last Year:
7.4°
Average change in
Precipitation
Chance of dry day after a precip day
Last Month:
100%
Last Year:
66%
Chance of precip day after a dry day
Last Month:
25%
Last Year:
19%
ForecastAdvisor Fact
17.8% of Persistence's low temperature forecasts for Portsmouth were within 3 degrees of actual temperatures last month.