Rochester averages 7 days a year above 90°F, with June the wettest month at 5.35 in of normal rain. The hottest day on record was 102°F on Jul 10, 1976; the coldest, −35°F on Feb 2, 1996. The single biggest 24-hour rain event recorded was 7.47 in on Jul 11, 1981.
Climate and Average Weather Year Round in Rochester
Year-round temperature
In Rochester, the warmest months are June through September, with average daily highs between 72°F and 80°F. The coldest stretch runs December through February, with highs between 23°F and 28°F and overnight lows reaching 7°F.
Rainfall through the year
Rainfall in Rochester averages 2.9 in per month over the long run. June is the wettest at 5.3 in, while January is the driest at 1.0 in.
Days at 90 °F or hotter
Rochester averages 7.0 days per year at 90 °F or hotter. The hottest year on record saw 21 such days (2012); the coolest just 1 (1994).
Precipitation this year
As of May 28, Rochester has received 8.5 in of precipitation this year — 26% below the long-term normal for this point in the year (11.5 in).