Chambersburg weather in May: Chambersburg, Pennsylvania: normal highs, lows, rain and records for May
Chambersburg in May has a normal high of 73°F and a normal low of 52°F, a daily mean of 62°F, rising from 69°F on the 1st to 76°F by the 31st. Measurable precipitation falls on 12 days in a normal May, 4.13 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 105 mm of precipitation in May.
- NOAA stationChambersburg (1 mi ESE)
- Station IDUSC00361354
- Location39.94°N 77.64°W
- Elevation640 ft (195 m)
- Population23,041
- Jan 37° 23°
- Feb 41° 25°
- Mar 50° 32°
- Apr 63° 42°
- May 73° 52°
- Jun 81° 61°
- Jul 85° 65°
- Aug 83° 63°
- Sep 76° 56°
- Oct 64° 45°
- Nov 52° 35°
- Dec 41° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Chambersburg in May?
The normal high is 73°F and the normal low 52°F, for a daily mean of 62.1°F. May is 9.7°F warmer than April and 8.6°F cooler than June. May is the 5th warmest month of the year in Chambersburg and the 2nd wettest. Across the month the normal high rises 7°F, from 69°F on May 1 to 76°F on May 31. From one year to the next May's mean temperature typically moves about 3.3°F either way (NOAA's standard deviation), so roughly two Mays in three average between 59°F and 65°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 41%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 69°F | 47°F | 40% | 28% |
| May 8 | 71°F | 49°F | 41% | 28% |
| May 15 | 72°F | 51°F | 40% | 27% |
| May 22 | 74°F | 53°F | 39% | 27% |
| May 31 | 76°F | 56°F | 38% | 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 | 69°F | 47°F | 40% | 28% | 13 h 50 min |
| May 2 | 69°F | 47°F | 40% | 28% | 13 h 50 min |
| May 3 | 69°F | 47°F | 40% | 28% | 14 h |
| May 4 | 70°F | 48°F | 41% | 28% | 14 h |
| May 5 | 70°F | 48°F | 41% | 28% | 14 h |
| May 6 | 70°F | 48°F | 41% | 28% | 14 h |
| May 7 | 70°F | 49°F | 41% | 28% | 14 h |
| May 8 | 71°F | 49°F | 41% | 28% | 14 h 10 min |
| May 9 | 71°F | 49°F | 41% | 28% | 14 h 10 min |
| May 10 | 71°F | 50°F | 41% | 28% | 14 h 10 min |
| May 11 | 71°F | 50°F | 40% | 28% | 14 h 10 min |
| May 12 | 72°F | 50°F | 40% | 28% | 14 h 20 min |
| May 13 | 72°F | 51°F | 40% | 27% | 14 h 20 min |
| May 14 | 72°F | 51°F | 40% | 27% | 14 h 20 min |
| May 15 | 72°F | 51°F | 40% | 27% | 14 h 20 min |
| May 16 | 73°F | 52°F | 40% | 27% | 14 h 20 min |
| May 17 | 73°F | 52°F | 40% | 27% | 14 h 20 min |
| May 18 | 73°F | 52°F | 40% | 27% | 14 h 30 min |
| May 19 | 73°F | 53°F | 40% | 27% | 14 h 30 min |
| May 20 | 74°F | 53°F | 40% | 27% | 14 h 30 min |
| May 21 | 74°F | 53°F | 39% | 27% | 14 h 30 min |
| May 22 | 74°F | 53°F | 39% | 27% | 14 h 30 min |
| May 23 | 74°F | 54°F | 39% | 26% | 14 h 40 min |
| May 24 | 75°F | 54°F | 39% | 26% | 14 h 40 min |
| May 25 | 75°F | 54°F | 39% | 26% | 14 h 40 min |
| May 26 | 75°F | 55°F | 39% | 26% | 14 h 40 min |
| May 27 | 75°F | 55°F | 39% | 26% | 14 h 40 min |
| May 28 | 76°F | 55°F | 39% | 26% | 14 h 40 min |
| May 29 | 76°F | 56°F | 39% | 26% | 14 h 40 min |
| May 30 | 76°F | 56°F | 38% | 26% | 14 h 50 min |
| May 31 | 76°F | 56°F | 38% | 26% | 14 h 50 min |
- Normal high
- 73°FMay average
- Normal low
- 52°FMay average
- Precipitation
- 4.13 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 50 min to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 20
- Days at 80°F or more
- 9
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00361354; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Chambersburg in May?
On a given May day the chance of 0.01 inch or more is 40% on average, highest around May 4 (41%). In all, 4.13 in falls on 12 days of a normal May, 1 of them with an inch or more.
In a normal May in Chambersburg, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00361354.
What are the records for May in Chambersburg?
The warmest May temperature on this station's record (since 1894) is 98°F, on May 15, 1944; the coldest is 25°F, on May 10, 1947. The wettest May brought 8.23 in (2003).
The May mean against the 1991-2020 normal of 62.1°F: 2021 60.1°F (−2.0), 2023 61.2°F (−0.9), 2024 66.4°F (+4.3), 2025 63.7°F (+1.6). 2 of 4 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.1°F | −2.0°F | 3.23 in |
| 2023 | 61.2°F | −0.9°F | 0.79 in |
| 2024 | 66.4°F | +4.3°F | 2.82 in |
| 2025 | 63.7°F | +1.6°F | 8.06 in |
Source: records: ACIS, station USC00361354; recent months: ACIS, station USC00361354. Records and recent months use complete months only.
How does May in Chambersburg 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; Chambersburg's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Chambersburg in April63°F by day, 42°F at night
- Chambersburg in June81°F by day, 61°F at night
- Chambersburg through the yearEvery month, frost dates, records and recent years
- Pennsylvania in MayThe statewide normal and the warmest and coolest places
- Phoenixville: Pennsylvania's warmest Maynormal high 75°F