Historical weather data, all-time temperature records, and monthly climate averages for Olney, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Olney typically feels like a proper spring day, with average highs around 62° and lows near 43°. The date has seen some wild swings though — as warm as 80° in 2023 and as cold as 29° back in 2016. There's about a 1-in-3 chance of rain, so keep an umbrella handy.
Olney's weather has real range — from a brutal -5° in January 1994 to a scorching 104° on July 5, 1999, a span of 109 degrees. A single day in September 2004 dumped 7.5 inches of rain, and the Blizzard of '96 dropped 24 inches of snow in one shot. This is a place that keeps you on your toes year-round.
Summer is the main event in Olney, with the hottest week of the year running July 16–22 and average highs peaking at 91° in mid-July. If you're looking to escape the heat, mid-January is the coolest stretch, with highs averaging just 40°. Rain is fairly evenly distributed, but early-to-mid July is the wettest stretch of the year.