Butler weather in May: Butler, Pennsylvania: normal highs, lows, rain and records for May
Butler in May has a normal high of 70°F and a normal low of 45°F, a daily mean of 57°F, rising from 66°F on the 1st to 74°F by the 31st. Measurable precipitation falls on 15 days in a normal May, 3.80 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 21°C and low of 7°C, 97 mm of precipitation in May.
- NOAA stationButler (2 mi SW)
- Station IDUSC00361139
- Location40.84°N 79.92°W
- Elevation1,000 ft (305 m)
- From the center2 miles
- Population13,010
- Jan 34° 17°
- Feb 37° 18°
- Mar 46° 25°
- Apr 60° 35°
- May 70° 45°
- Jun 78° 54°
- Jul 82° 58°
- Aug 81° 57°
- Sep 74° 50°
- Oct 62° 39°
- Nov 50° 30°
- Dec 39° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Butler in May?
The normal high is 70°F and the normal low 45°F, for a daily mean of 57.4°F. May is 10.1°F warmer than April and 8.7°F cooler than June. May is the 5th warmest month of the year in Butler and the 5th wettest. Across the month the normal high rises 8°F, from 66°F on May 1 to 74°F on May 31. From one year to the next May's mean temperature typically moves about 3.7°F either way (NOAA's standard deviation), so roughly two Mays in three average between 54°F and 61°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 50%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 66°F | 40°F | 50% | 27% |
| May 8 | 68°F | 42°F | 49% | 27% |
| May 15 | 70°F | 44°F | 49% | 27% |
| May 22 | 72°F | 47°F | 47% | 26% |
| May 31 | 74°F | 50°F | 46% | 26% |
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 | 66°F | 40°F | 50% | 27% | 14 h |
| May 2 | 66°F | 40°F | 50% | 27% | 14 h |
| May 3 | 67°F | 40°F | 50% | 27% | 14 h |
| May 4 | 67°F | 41°F | 50% | 27% | 14 h |
| May 5 | 67°F | 41°F | 49% | 27% | 14 h |
| May 6 | 68°F | 41°F | 49% | 27% | 14 h 10 min |
| May 7 | 68°F | 42°F | 49% | 27% | 14 h 10 min |
| May 8 | 68°F | 42°F | 49% | 27% | 14 h 10 min |
| May 9 | 68°F | 42°F | 49% | 27% | 14 h 10 min |
| May 10 | 69°F | 43°F | 49% | 27% | 14 h 20 min |
| May 11 | 69°F | 43°F | 49% | 27% | 14 h 20 min |
| May 12 | 69°F | 43°F | 49% | 27% | 14 h 20 min |
| May 13 | 69°F | 44°F | 49% | 27% | 14 h 20 min |
| May 14 | 70°F | 44°F | 49% | 27% | 14 h 20 min |
| May 15 | 70°F | 44°F | 49% | 27% | 14 h 30 min |
| May 16 | 70°F | 45°F | 49% | 27% | 14 h 30 min |
| May 17 | 70°F | 45°F | 49% | 27% | 14 h 30 min |
| May 18 | 71°F | 46°F | 48% | 27% | 14 h 30 min |
| May 19 | 71°F | 46°F | 48% | 27% | 14 h 30 min |
| May 20 | 71°F | 46°F | 48% | 27% | 14 h 40 min |
| May 21 | 71°F | 47°F | 48% | 26% | 14 h 40 min |
| May 22 | 72°F | 47°F | 47% | 26% | 14 h 40 min |
| May 23 | 72°F | 47°F | 47% | 26% | 14 h 40 min |
| May 24 | 72°F | 48°F | 47% | 26% | 14 h 40 min |
| May 25 | 72°F | 48°F | 47% | 26% | 14 h 40 min |
| May 26 | 73°F | 48°F | 47% | 26% | 14 h 40 min |
| May 27 | 73°F | 49°F | 46% | 26% | 14 h 50 min |
| May 28 | 73°F | 49°F | 46% | 26% | 14 h 50 min |
| May 29 | 73°F | 49°F | 46% | 26% | 14 h 50 min |
| May 30 | 74°F | 50°F | 46% | 26% | 14 h 50 min |
| May 31 | 74°F | 50°F | 46% | 26% | 14 h 50 min |
- Normal high
- 70°FMay average
- Normal low
- 45°FMay average
- Precipitation
- 3.80 inmonth total
- Days with precipitation
- 150.01 inch or more
- Nights at 32°F or colder
- 2
- Daylight
- 14 h to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 18
- Days at 80°F or more
- 7
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00361139; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Butler in May?
On a given May day the chance of 0.01 inch or more is 48% on average, highest around May 1 (50%). In all, 3.80 in falls on 15 days of a normal May, 1 of them with an inch or more.
In a normal May in Butler, 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00361139.
What are the records for May in Butler?
The warmest May temperature on this station's record (since 1967) is 91°F, on May 31, 1987; the coldest is 22°F, on May 2, 1978. The wettest May brought 7.31 in (1990).
Source: records: ACIS, station USC00361139. Records and recent months use complete months only.
How does May in Butler compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, May normal highs run from 65°F in Laporte to 75°F in Phoenixville; Butler's is 70°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.