Peak score
8.4/10
Best months in Olean, United States
Best Time to Visit Olean, United States
Climate guide for Olean, United States — updated 2026
Travel window June, July, August, September Peak: June · 8.4/10 climate score
Months to avoid January, February, March, December
Olean on the map · best months to visit
Olean, United States
- Best monthsJune, July, August, September
- Avoid monthsJanuary, February, March, December
- Visit score now8/10
- Coordinates
- 42.08°, -78.43°
Quick answer
Plan your trip for June, July, August, September. Expect average highs near 24°C, lows near 15°C, and about 12 rainy days a month. Skip January, February, March, December when very cold temperatures, frequent rain sets in.
Warmest month
26°C
Coldest month
-7°C
Wettest month
15d
Travel score by month
Each score weighs temperature comfort, rain, humidity, and outdoor conditions. Higher is better.
1 Jan
1.3 Feb
1.5 Mar
4.3 Apr
6.5 May
8.4 Jun
8.4 Jul
8.4 Aug
8.1 Sep
5.6 Oct
1.8 Nov
1 Dec
Excellent (7–10) Mixed (5–6) Tough (0–4)
Month-by-Month Recommendation
Tap any month to open its full weather page. Cards highlight score, temperature, rain, and comfort.
January
1 /10
Poor
0°C / -7°C 15 rainy days Comfort Score: 1/10
February
1.3 /10
Poor
3°C / -6°C 13 rainy days Comfort Score: 1/10
March
1.5 /10
Poor
7°C / -2°C 13 rainy days Comfort Score: 1/10
April
4.3 /10
Fair
13°C / 3°C 15 rainy days Comfort Score: 4.5/10
May
6.5 /10
Good
19°C / 10°C 15 rainy days Comfort Score: 7/10
June Best
8.4 /10
Great
24°C / 14°C 13 rainy days Comfort Score: 10/10
July Best
8.4 /10
Great
26°C / 17°C 14 rainy days Comfort Score: 10/10
August Best
8.4 /10
Great
25°C / 17°C 13 rainy days Comfort Score: 10/10
September Best
8.1 /10
Great
22°C / 13°C 9 rainy days Comfort Score: 8.8/10
October
5.6 /10
Good
16°C / 8°C 12 rainy days Comfort Score: 5/10
November
1.8 /10
Poor
8°C / 1°C 13 rainy days Comfort Score: 2/10
December
1 /10
Poor
2°C / -4°C 15 rainy days Comfort Score: 1/10
Climate normals
Compare the monthly shape of temperature highs/lows and rainfall before locking in your dates.
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 0°C / -7°C . Feb: 3°C / -6°C . Mar: 7°C / -2°C . Apr: 13°C / 3°C . May: 19°C / 10°C . Jun: 24°C / 14°C . Jul: 26°C / 17°C . Aug: 25°C / 17°C . Sep: 22°C / 13°C . Oct: 16°C / 8°C . Nov: 8°C / 1°C . Dec: 2°C / -4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 87 mm. Feb: 87 mm. Mar: 90 mm. Apr: 114 mm. May: 112 mm. Jun: 103 mm. Jul: 91 mm. Aug: 101 mm. Sep: 84 mm. Oct: 104 mm. Nov: 81 mm. Dec: 85 mm.
Season by Season
Season cards explain why scores rise and fall, with a representative month picked for each.
Spring
Avg score 4.1/10Mar, Apr, May
Average highs of 13°C (55°F) with 14 rainy days per month. Climate score: 4.1/10.
This month falls at the beginning of Spring. Cold conditions dominate the month.
Weather conditions this month are less ideal compared to other times of the year. Indoor activities or shorter outings may be more comfortable.
Summer
Avg score 8.4/10Jun, Jul, Aug
Average highs of 25°C (77°F) with 13 rainy days per month. Climate score: 8.4/10.
This month falls at the beginning of Summer.
Weather conditions this month are among the best of the year, making it a popular time for outdoor activities.
Autumn
Avg score 5.2/10Sep, Oct, Nov
Average highs of 15°C (59°F) with 11 rainy days per month. Climate score: 5.2/10.
This month falls at the beginning of Autumn.
Weather conditions this month are among the best of the year, making it a popular time for outdoor activities.
Winter
Avg score 1.1/10Dec, Jan, Feb
Average highs of 2°C (36°F) with 14 rainy days per month. Climate score: 1.1/10.
This month falls at the middle of Winter. Cold conditions dominate the month.
Weather conditions this month are less ideal compared to other times of the year. Indoor activities or shorter outings may be more comfortable.
Frequently Asked Questions
The best months to visit Olean are June, July, August, September, when temperatures are comfortable and rainfall is low.
Consider avoiding January, February, March, December due to very cold temperatures, frequent rain.
Packing depends on the season. In peak months (June, July, August, September), light layers and sun protection are typical essentials.
Yes! June earns a climate score of 8.4/10 and is one of the best months to visit Olean. Warm conditions, with highs averaging 23.6°C (74°F). Rain falls on about 13 days this month.
Yes! July earns a climate score of 8.4/10 and is one of the best months to visit Olean. Warm conditions, with highs averaging 26.3°C (79°F). Rain falls on about 14 days this month.