Olean climate

Olean Weather in May

NOAA 1991-2020 normals for Olean, 1.9 km from Olean

Average highs run from 64°F on May 1 to 72°F on May 31, and lows from 39°F to 48°F. Normal precipitation for the month is 3.66 in over about 15 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Olean, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
68°F
Average low
44°F
Precipitation
3.66 in
Record high
92°FMay 16, 1906
Record low
15°FMay 1, 1963
Chance of a freeze
71%
Daylight
14 h 04 min to 15 h 01 min
Cloud cover
67%
Humidity
79%
Dew point
48°F
Wind
4.7 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 164°F39°F86°F 194215°F 196348%
May 264°F39°F82°F 194215°F 196348%
May 364°F39°F82°F 201819°F 196648%
May 465°F40°F84°F 201219°F 190848%
May 565°F40°F88°F 195017°F 196648%
May 665°F41°F82°F 194320°F 196848%
May 766°F41°F83°F 193619°F 196848%
May 866°F41°F83°F 193623°F 195648%
May 966°F42°F85°F 197920°F 197748%
May 1067°F42°F87°F 201520°F 196248%
May 1167°F42°F88°F 193615°F 196348%
May 1267°F43°F84°F 201520°F 190748%
May 1368°F43°F83°F 201124°F 196748%
May 1468°F43°F85°F 201424°F 193948%
May 1568°F44°F85°F 197426°F 190248%
May 1669°F44°F92°F 190622°F 193448%
May 1769°F44°F88°F 199823°F 198348%
May 1869°F44°F85°F 190323°F 198348%
May 1969°F45°F90°F 202626°F 200948%0%
May 2070°F45°F89°F 199627°F 195648%0%
May 2170°F45°F88°F 197725°F 190648%0%
May 2270°F46°F90°F 197725°F 193548%0%
May 2370°F46°F90°F 197721°F 196748%0%
May 2471°F46°F89°F 196422°F 196348%0%
May 2571°F47°F89°F 190822°F 195648%0%
May 2671°F47°F88°F 202020°F 195648%0%
May 2771°F47°F86°F 199124°F 196947%0%
May 2872°F48°F88°F 190827°F 196147%0%
May 2972°F48°F87°F 201228°F 190647%0%
May 3072°F48°F88°F 200626°F 196147%0%
May 3172°F48°F90°F 200628°F 190747%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Olean, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 6:09 AM, sunset 8:13 PM
May 31
sunrise 5:41 AM, sunset 8:42 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00306196 (Olean), public domain. Records: NOAA GHCN-Daily, station USC00303025, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.