Portsmouth, OH Weather & Climate Normals
Portsmouth's real weather, in one number
Portsmouth, OH scores 50/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Portsmouth's hottest and coldest months
Portsmouth's hottest month is Jul, averaging 76°F; its coldest is Jan, averaging 32°F, a 44°F swing across the year, a middling gap by national standards.
Rain and snow in Portsmouth
Over a typical year, Portsmouth sees about 43.09in of precipitation a year across roughly 131 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where Portsmouth ranks
Portsmouth ranks 1755 of 4876 US cities in this dataset for comfort score, and 68 of 254 within OH. About 17,489 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from PORTSMOUTH-SCIOTOVILLE, OH US, 3.4 miles from Portsmouth, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · How the comfort score is calculated