Salem averages 19 days a year above 90°F, with December the wettest month at 6.97 in of normal rain. The hottest day on record was 117°F on Jun 28, 2021; the coldest, −12°F on Dec 8, 1972. The single biggest 24-hour rain event recorded was 3.07 in on Jan 20, 1972.
Climate and Average Weather Year Round in Salem
Year-round temperature
In Salem, the warmest months are June through September, with average daily highs between 75°F and 84°F. The coldest stretch runs December through February, with highs between 47°F and 52°F and overnight lows reaching 35°F.
Rainfall through the year
Rainfall in Salem averages 3.3 in per month over the long run. December is the wettest at 7.0 in, while July is the driest at 0.3 in.
Days at 90 °F or hotter
Salem averages 19.0 days per year at 90 °F or hotter. The hottest year on record saw 41 such days (2021); the coolest just 8 (2000).
Precipitation this year
As of May 28, Salem has received 14.1 in of precipitation this year — 30% below the long-term normal for this point in the year (20.1 in).