Historical weather data, all-time temperature records, and monthly climate averages for Olean, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Olean sits right in that awkward shoulder season — average highs of 53° with lows still dipping to around 30°. There's a 55% chance of precipitation today, and while snow is unlikely, it's not impossible: the coldest low ever recorded on this date was 16° back in 2021. Just four years ago.
Olean's weather has real range — from a punishing 99° in July 2011 to a brutal -22° in January 2022, that's a 121-degree spread between extremes. The snowiest single day on record was a Christmas to remember: 23 inches fell on December 25, 1978.
Summer is short and sweet in Olean, peaking in the week of July 16-22 with average highs of 82°. Winters are cold and serious — January highs average just 31°, and the coolest week of the year barely clears 30°. If you're planning around rain, June is the wettest month, so late summer or early fall offers the most comfortable conditions.