Monthly climate averages for Olean, United States. Based on 10-year ERA5 reanalysis data.
Dfb Warm-Summer Continental
Climate OverviewOlean, United States in August has warm conditions, with highs averaging 25.1°C (77°F). Rain falls on about 13 days this month.
This month falls at the end of Summer.
Temperatures remain fairly steady throughout August, with daily highs around 25°C (77°F).
August sees fairly even rainfall, totalling about 102 mm across the month.
Expect around 11.4h of sunshine at the start of August, decreasing to 9.8h by the end.
The warmest days tend to fall around the 5th, averaging 26.2°C (79°F).
Temperatures begin dropping heading into September.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 25°C (77°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Rain usually comes in shorter passing showers rather than all-day rain.
1 of the last 5 yearly records were warmer than this month's long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 0°C / -7°C | -4°C / -12°C | 15days (87 mm) Wet | 4.5h Fair | 78% Humid | 1.9 Low | Poor | View Details |
| February | 3°C / -6°C | -2°C / -11°C | 13days (87 mm) Wet | 5.8h Fair | 75% Muggy | 3 Moderate | Poor | View Details |
| March | 7°C / -2°C | 4°C / -7°C | 13days (90 mm) Wet | 7.3h Good | 70% Muggy | 4.2 Moderate | Poor | View Details |
| April | 13°C / 3°C | 11°C / 0°C | 15days (114 mm) Wet | 8.4h Good | 70% Muggy | 4.8 Moderate | Poor | View Details |
| May | 19°C / 10°C | 18°C / 8°C | 15days (112 mm) Wet | 9.6h Good | 75% Muggy | 5.8 High | Good | View Details |
| June best | 24°C / 14°C | 24°C / 14°C | 13days (103 mm) Wet | 11.1h Excellent | 75% Muggy | 6.7 High | Excellent | View Details |
| July best | 26°C / 17°C | 28°C / 18°C | 14days (91 mm) Wet | 11.3h Excellent | 76% Humid | 6.9 High | Excellent | View Details |
| August best | 25°C / 17°C | 26°C / 17°C | 13days (101 mm) Wet | 10.4h Excellent | 77% Humid | 5.9 High | Excellent | View Details |
| September best | 22°C / 13°C | 22°C / 13°C | 9days (84 mm) Wet | 8.8h Good | 78% Humid | 5 Moderate | Excellent | View Details |
| October | 16°C / 8°C | 14°C / 5°C | 12days (104 mm) Wet | 6.9h Fair | 78% Humid | 3.4 Moderate | Fair | View Details |
| November | 8°C / 1°C | 4°C / -3°C | 13days (81 mm) Wet | 5.3h Fair | 77% Humid | 2.2 Moderate | Poor | View Details |
| December | 2°C / -4°C | -2°C / -9°C | 15days (85 mm) Wet | 3.9h Poor | 79% Humid | 1.6 Low | Poor | View Details |
Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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