Annual mean 9°C · wettest around April · prevailing wind W
Warmest
24.5 °C
Coldest
-3.1 °C
Wettest
13%
Windiest
4.7 m/s
Prevailing
W
3.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Olean over the whole year is 9°C. July is the hottest month, with highs of about 24°C; January is the coldest, with lows of about -5°C. Olean has no sharply defined rainy season: the chance of rain on a given day runs from 10% in January, the driest month, to 15% in April, the wettest. Winds in Olean are highest in March, averaging 3.9 m/s (14 km/h), and lightest in July, at 2.3 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Olean come in July, when the sky is typically 44% covered; January is the cloudiest month, at 79%.
Month by month Olean climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-3°C
-5°C
-8°C
10%
79%
3.7 m/s
0
0
2
February
-0°C
-4°C
-6°C
11%
70%
3.8 m/s
1
0
6
March
4°C
-1°C
-2°C
11%
63%
3.9 m/s
2
0
18
April
10°C
4°C
5°C
15%
62%
3.5 m/s
14
0
40
May
17°C
10°C
14°C
14%
55%
3.0 m/s
45
6
67
June
21°C
15°C
20°C
13%
48%
2.7 m/s
70
22
64
July
24°C
17°C
24°C
10%
44%
2.3 m/s
78
42
41
August
23°C
16°C
23°C
11%
49%
2.3 m/s
81
34
50
September
20°C
13°C
18°C
11%
50%
2.4 m/s
67
16
70
October
14°C
8°C
10°C
14%
58%
3.0 m/s
30
2
60
November
5°C
2°C
0°C
12%
66%
3.5 m/s
4
0
19
December
1°C
-2°C
-5°C
12%
77%
3.6 m/s
0
0
4
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Olean weather by season
Year round, Olean has days of about -3°C at their warmest in January, its coolest month, and 24°C in July, its warmest; the coolest hours of the day run from -5°C to 17°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around April and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Olean weather in winterDecember to February
High -1°CLow -3°CRain 11%
Winter in Olean has typical daily highs of about -1°C and lows of about -3°C, with a 11% chance of rain on a given day.
Olean weather in springMarch to May
High 10°CLow 4°CRain 13%
Spring in Olean has typical daily highs of about 10°C and lows of about 4°C, with a 13% chance of rain on a given day.
Olean weather in summerJune to August
High 23°CLow 16°CRain 12%
Summer in Olean has typical daily highs of about 23°C and lows of about 16°C, with a 12% chance of rain on a given day.
Olean weather in autumnSeptember to November
High 13°CLow 8°CRain 12%
Autumn in Olean has typical daily highs of about 13°C and lows of about 8°C, with a 12% chance of rain on a given day.
When is the rainy season in Olean?
Olean has no sharply defined rainy season: the chance of rain on a given day runs from 10% in January, the driest month, to 15% in April, the wettest.
What time of year is Olean windiest?
Winds in Olean are highest in March, averaging 3.9 m/s (14 km/h), and lightest in July, at 2.3 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Olean year round?
The average temperature in Olean over the whole year is 9°C. July is the hottest month, with highs of about 24°C; January is the coldest, with lows of about -5°C.