Olean (NY) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Olean.
Climate overview of Olean
Temperatures in Olean, New York State, United States of America, vary greatly throughout the year. July is the hottest month at 26°C (79°F), while February is the coldest at -1°C (30°F).
The city has a wet climate, receiving around 1047 mm (41 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. August is the wettest month.
Olean Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Olean - and find the best time to visit.
Monthly Temperature in Olean
The climate in Olean is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 26°C (79°F) in July to a very cold -1°C (30°F) in February.
Nighttime temperatures range from 13°C (55°F) in July to -11°C (12°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Olean
Olean has a notably wet climate with abundant precipitation, recording 1047 mm (41 in) of rain/snowfall per year. The amount of precipitation varies moderately throughout the year. The wettest month, August, sees around 110 mm (4.3 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 58 mm (2.3 in) of snowfall. For more details, please visit our Olean Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Olean
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May and September
- Warmest weather: July and August
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: February, with freezing nights around -11°C (12°F).
Frequently asked questions about the climate in Olean
What is the best time to visit Olean?
May and September typically offer the most optimal weather in Olean. In contrast, January, February, March, November and December tend to have less optimal conditions. Olean has warm summers and very cold winters.
What temperatures can I expect in Olean?
Daytime highs range from -1°C (30°F) in February to 26°C (79°F) in July. Nighttime lows range from -11°C (12°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Olean get?
Annual rainfall is around 1047 mm (41 in). August is the wettest month with 110 mm (4.3 in), while February is the driest with 58 mm (2.3 in).
Olean 3-Day Forecast
Olean (NY) 3-Day Forecast
Olean on the map
Olean is highlighted - select any city to see its climate.
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