New Castle weather in May: New Castle, Pennsylvania: normal highs, lows, rain and records for May
New Castle in May has a normal high of 73°F and a normal low of 47°F, a daily mean of 60°F, rising from 69°F on the 1st to 77°F by the 31st. Measurable precipitation falls on 14 days in a normal May, 3.89 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 8°C, 99 mm of precipitation in May.
- NOAA stationNew Castle (1 mi N)
- Station IDUSC00366233
- Location41.02°N 80.36°W
- Elevation825 ft (252 m)
- Population21,332
- Jan 37° 19°
- Feb 40° 20°
- Mar 49° 27°
- Apr 63° 36°
- May 73° 47°
- Jun 82° 56°
- Jul 86° 60°
- Aug 85° 59°
- Sep 79° 52°
- Oct 66° 41°
- Nov 53° 32°
- Dec 42° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is New Castle in May?
The normal high is 73°F and the normal low 47°F, for a daily mean of 60.1°F. May is 10.7°F warmer than April and 8.7°F cooler than June. May is the 5th warmest month of the year in New Castle and the 4th wettest. Across the month the normal high rises 8°F, from 69°F on May 1 to 77°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 56°F and 64°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 | 69°F | 42°F | 48% | 28% |
| May 8 | 71°F | 44°F | 47% | 28% |
| May 15 | 73°F | 47°F | 47% | 28% |
| May 22 | 75°F | 49°F | 46% | 28% |
| May 31 | 77°F | 52°F | 45% | 28% |
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 | 69°F | 42°F | 48% | 28% | 14 h |
| May 2 | 70°F | 42°F | 48% | 28% | 14 h |
| May 3 | 70°F | 42°F | 48% | 28% | 14 h |
| May 4 | 70°F | 43°F | 48% | 28% | 14 h |
| May 5 | 71°F | 43°F | 48% | 28% | 14 h 10 min |
| May 6 | 71°F | 43°F | 47% | 28% | 14 h 10 min |
| May 7 | 71°F | 44°F | 47% | 28% | 14 h 10 min |
| May 8 | 71°F | 44°F | 47% | 28% | 14 h 10 min |
| May 9 | 72°F | 45°F | 47% | 28% | 14 h 10 min |
| May 10 | 72°F | 45°F | 47% | 28% | 14 h 20 min |
| May 11 | 72°F | 45°F | 47% | 28% | 14 h 20 min |
| May 12 | 72°F | 46°F | 47% | 28% | 14 h 20 min |
| May 13 | 73°F | 46°F | 47% | 28% | 14 h 20 min |
| May 14 | 73°F | 46°F | 47% | 28% | 14 h 20 min |
| May 15 | 73°F | 47°F | 47% | 28% | 14 h 30 min |
| May 16 | 73°F | 47°F | 47% | 28% | 14 h 30 min |
| May 17 | 74°F | 47°F | 47% | 28% | 14 h 30 min |
| May 18 | 74°F | 48°F | 47% | 28% | 14 h 30 min |
| May 19 | 74°F | 48°F | 46% | 28% | 14 h 30 min |
| May 20 | 74°F | 48°F | 46% | 28% | 14 h 40 min |
| May 21 | 75°F | 49°F | 46% | 28% | 14 h 40 min |
| May 22 | 75°F | 49°F | 46% | 28% | 14 h 40 min |
| May 23 | 75°F | 49°F | 46% | 28% | 14 h 40 min |
| May 24 | 75°F | 50°F | 46% | 28% | 14 h 40 min |
| May 25 | 76°F | 50°F | 46% | 28% | 14 h 40 min |
| May 26 | 76°F | 50°F | 46% | 28% | 14 h 50 min |
| May 27 | 76°F | 50°F | 45% | 28% | 14 h 50 min |
| May 28 | 76°F | 51°F | 45% | 28% | 14 h 50 min |
| May 29 | 77°F | 51°F | 45% | 28% | 14 h 50 min |
| May 30 | 77°F | 51°F | 45% | 28% | 14 h 50 min |
| May 31 | 77°F | 52°F | 45% | 28% | 14 h 50 min |
- Normal high
- 73°FMay average
- Normal low
- 47°FMay average
- Precipitation
- 3.89 inmonth total
- Days with precipitation
- 140.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 1
- Daylight
- 14 h to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 20
- Days at 80°F or more
- 9
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00366233; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in New Castle in May?
On a given May day the chance of 0.01 inch or more is 47% on average, highest around May 1 (48%). In all, 3.89 in falls on 14 days of a normal May, 1 of them with an inch or more.
In a normal May in New Castle, 1 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00366233.
What are the records for May in New Castle?
The warmest May temperature on this station's record (since 1894) is 95°F, on May 28, 1911; the coldest is 21°F, on May 2, 1923. The wettest May brought 9.96 in (1946); the snowiest, 1.5 inches (1963).
Source: records: ACIS, station USC00366233. Records and recent months use complete months only.
How does May in New Castle 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; New Castle's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.