Olean weather in May: Olean, New York: normal highs, lows, rain and records for May
Olean in May has a normal high of 68°F and a normal low of 44°F, a daily mean of 56°F, rising from 64°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 15 days in a normal May, 3.66 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 7°C, 93 mm of precipitation in May.
- NOAA stationOlean
- Station IDUSC00306196
- Location42.07°N 78.45°W
- Elevation1,420 ft (433 m)
- From the center1 miles
- Population13,614
- Jan 32° 13°
- Feb 34° 15°
- Mar 43° 21°
- Apr 57° 32°
- May 68° 44°
- Jun 76° 53°
- Jul 80° 57°
- Aug 79° 55°
- Sep 73° 49°
- Oct 60° 38°
- Nov 47° 29°
- Dec 37° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Olean in May?
The normal high is 68°F and the normal low 44°F, for a daily mean of 56.0°F. May is 11.5°F warmer than April and 8.2°F cooler than June. May is the 5th warmest month of the year in Olean and the 5th wettest. Across the month the normal high rises 8°F, from 64°F on May 1 to 72°F on May 31. From one year to the next May's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Mays in three average between 53°F and 59°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 48%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 64°F | 39°F | 48% | 28% |
| May 8 | 66°F | 41°F | 48% | 28% |
| May 15 | 68°F | 44°F | 48% | 28% |
| May 22 | 70°F | 46°F | 48% | 27% |
| May 31 | 72°F | 48°F | 47% | 27% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 64°F | 39°F | 48% | 28% | 14 h |
| May 2 | 64°F | 39°F | 48% | 28% | 14 h |
| May 3 | 64°F | 39°F | 48% | 28% | 14 h 10 min |
| May 4 | 65°F | 40°F | 48% | 28% | 14 h 10 min |
| May 5 | 65°F | 40°F | 48% | 28% | 14 h 10 min |
| May 6 | 65°F | 41°F | 48% | 28% | 14 h 10 min |
| May 7 | 66°F | 41°F | 48% | 28% | 14 h 10 min |
| May 8 | 66°F | 41°F | 48% | 28% | 14 h 20 min |
| May 9 | 66°F | 42°F | 48% | 28% | 14 h 20 min |
| May 10 | 67°F | 42°F | 48% | 28% | 14 h 20 min |
| May 11 | 67°F | 42°F | 48% | 28% | 14 h 20 min |
| May 12 | 67°F | 43°F | 48% | 28% | 14 h 30 min |
| May 13 | 68°F | 43°F | 48% | 28% | 14 h 30 min |
| May 14 | 68°F | 43°F | 48% | 28% | 14 h 30 min |
| May 15 | 68°F | 44°F | 48% | 28% | 14 h 30 min |
| May 16 | 69°F | 44°F | 48% | 28% | 14 h 30 min |
| May 17 | 69°F | 44°F | 48% | 28% | 14 h 40 min |
| May 18 | 69°F | 44°F | 48% | 28% | 14 h 40 min |
| May 19 | 69°F | 45°F | 48% | 27% | 14 h 40 min |
| May 20 | 70°F | 45°F | 48% | 27% | 14 h 40 min |
| May 21 | 70°F | 45°F | 48% | 27% | 14 h 40 min |
| May 22 | 70°F | 46°F | 48% | 27% | 14 h 50 min |
| May 23 | 70°F | 46°F | 48% | 27% | 14 h 50 min |
| May 24 | 71°F | 46°F | 48% | 27% | 14 h 50 min |
| May 25 | 71°F | 47°F | 48% | 27% | 14 h 50 min |
| May 26 | 71°F | 47°F | 48% | 27% | 14 h 50 min |
| May 27 | 71°F | 47°F | 47% | 27% | 14 h 50 min |
| May 28 | 72°F | 48°F | 47% | 27% | 15 h |
| May 29 | 72°F | 48°F | 47% | 27% | 15 h |
| May 30 | 72°F | 48°F | 47% | 27% | 15 h |
| May 31 | 72°F | 48°F | 47% | 27% | 15 h |
- Normal high
- 68°FMay average
- Normal low
- 44°FMay average
- Precipitation
- 3.66 inmonth total
- Days with precipitation
- 150.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 14 h to 15 hMay 1 to May 31
- Days at 70°F or more
- 17
- Days at 80°F or more
- 6
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00306196; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Olean in May?
On a given May day the chance of 0.01 inch or more is 48% on average, highest around May 11 (48%). In all, 3.66 in falls on 15 days of a normal May, 1 of them with an inch or more.
In a normal May in Olean, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00306196.
What are the records for May in Olean?
The May mean against the 1991-2020 normal of 56.0°F: 2021 54.3°F (−1.7), 2022 58.0°F (+2.0), 2023 53.5°F (−2.5), 2024 60.0°F (+4.0), 2025 55.2°F (−0.8), 2026 52.6°F (−3.4). 2 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 54.3°F | −1.7°F | 2.51 in |
| 2022 | 58.0°F | +2.0°F | 3.60 in |
| 2023 | 53.5°F | −2.5°F | 1.61 in |
| 2024 | 60.0°F | +4.0°F | 2.19 in |
| 2025 | 55.2°F | −0.8°F | 6.66 in |
| 2026 | 52.6°F | −3.4°F | 3.58 in |
Source: recent months: ACIS, station USC00306196. Records and recent months use complete months only.
How does May in Olean compare across New York?
Across the 131 places PlainClimate covers in New York, May normal highs run from 60°F in Cooperstown to 74°F in Hudson; Olean's is 68°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.