Historical weather data, all-time temperature records, and monthly climate averages for Lancaster, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Lancaster sits in that classic late-winter limbo — historically averaging a high of 49° and a low of 32°, with a coin-flip chance of precipitation and a 16% shot at snow. The date's range tells the whole story: it's hit 77° as recently as 2023, but bottomed out at a brutal 17° back in 1975.
Lancaster plays for keeps when it comes to weather extremes — from a scorching 99° in August 1948 to a bone-cracking -20° in February 1961, that's a 119-degree swing in the historical record. The snowiest single day on the books is a staggering 33.9 inches on December 10, 1995, a storm that still defines the town's winter reputation.
Summer is Lancaster's sweet spot, with highs peaking around 81° during the week of July 9–15 before gradually cooling through fall. Winters are legitimately cold — January and February average highs hover in the low 30s, dipping to a mean of 30° in the coldest week of mid-January. If you're watching your umbrella, note that the wettest stretch is actually late December, averaging just over an inch of precipitation in the final week of the year.