Frederick weather in May: Frederick, Maryland: normal highs, lows, rain and records for May
Frederick in May has a normal high of 77°F and a normal low of 55°F, a daily mean of 66°F, rising from 74°F on the 1st to 81°F by the 31st. Measurable precipitation falls on 10 days in a normal May, 3.99 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 13°C, 101 mm of precipitation in May.
- NOAA stationFrederick Police Barracks
- Station IDUSC00183348
- Location39.42°N 77.44°W
- Elevation380 ft (116 m)
- From the center2 miles
- Population89,537
- Jan 43° 27°
- Feb 48° 29°
- Mar 55° 36°
- Apr 69° 45°
- May 77° 55°
- Jun 85° 63°
- Jul 89° 68°
- Aug 87° 66°
- Sep 80° 59°
- Oct 69° 47°
- Nov 56° 38°
- Dec 47° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Frederick in May?
The normal high is 77°F and the normal low 55°F, for a daily mean of 66.2°F. May is 9.5°F warmer than April and 8.0°F cooler than June. May is the 5th warmest month of the year in Frederick and the 3rd wettest. Across the month the normal high rises 7°F, from 74°F on May 1 to 81°F on May 31. From one year to the next May's mean temperature typically moves about 3.4°F either way (NOAA's standard deviation), so roughly two Mays in three average between 63°F and 70°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 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 74°F | 50°F | 33% | 22% |
| May 8 | 76°F | 53°F | 33% | 23% |
| May 15 | 77°F | 55°F | 32% | 22% |
| May 22 | 79°F | 57°F | 32% | 23% |
| May 31 | 81°F | 59°F | 32% | 23% |
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 | 74°F | 50°F | 33% | 22% | 13 h 50 min |
| May 2 | 74°F | 51°F | 33% | 23% | 13 h 50 min |
| May 3 | 75°F | 51°F | 33% | 23% | 13 h 50 min |
| May 4 | 75°F | 51°F | 33% | 23% | 14 h |
| May 5 | 75°F | 52°F | 33% | 23% | 14 h |
| May 6 | 75°F | 52°F | 33% | 23% | 14 h |
| May 7 | 76°F | 52°F | 33% | 23% | 14 h |
| May 8 | 76°F | 53°F | 33% | 23% | 14 h |
| May 9 | 76°F | 53°F | 32% | 23% | 14 h 10 min |
| May 10 | 76°F | 53°F | 32% | 23% | 14 h 10 min |
| May 11 | 76°F | 54°F | 32% | 23% | 14 h 10 min |
| May 12 | 77°F | 54°F | 32% | 23% | 14 h 10 min |
| May 13 | 77°F | 54°F | 32% | 23% | 14 h 10 min |
| May 14 | 77°F | 55°F | 32% | 23% | 14 h 20 min |
| May 15 | 77°F | 55°F | 32% | 22% | 14 h 20 min |
| May 16 | 77°F | 55°F | 32% | 23% | 14 h 20 min |
| May 17 | 78°F | 55°F | 32% | 23% | 14 h 20 min |
| May 18 | 78°F | 56°F | 32% | 23% | 14 h 20 min |
| May 19 | 78°F | 56°F | 32% | 23% | 14 h 30 min |
| May 20 | 78°F | 56°F | 32% | 22% | 14 h 30 min |
| May 21 | 78°F | 57°F | 32% | 22% | 14 h 30 min |
| May 22 | 79°F | 57°F | 32% | 23% | 14 h 30 min |
| May 23 | 79°F | 57°F | 32% | 23% | 14 h 30 min |
| May 24 | 79°F | 57°F | 32% | 23% | 14 h 30 min |
| May 25 | 79°F | 58°F | 32% | 23% | 14 h 40 min |
| May 26 | 80°F | 58°F | 32% | 23% | 14 h 40 min |
| May 27 | 80°F | 58°F | 32% | 23% | 14 h 40 min |
| May 28 | 80°F | 58°F | 32% | 23% | 14 h 40 min |
| May 29 | 80°F | 59°F | 32% | 23% | 14 h 40 min |
| May 30 | 81°F | 59°F | 32% | 23% | 14 h 40 min |
| May 31 | 81°F | 59°F | 32% | 23% | 14 h 40 min |
- Normal high
- 77°FMay average
- Normal low
- 55°FMay average
- Precipitation
- 3.99 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h 50 min to 14 h 40 minMay 1 to May 31
- Days at 70°F or more
- 25
- Days at 80°F or more
- 12
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00183348; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Frederick in May?
On a given May day the chance of 0.01 inch or more is 32% on average, highest around May 2 (33%). In all, 3.99 in falls on 10 days of a normal May, 1 of them with an inch or more.
In a normal May in Frederick, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00183348.
What are the records for May in Frederick?
The warmest May temperature on this station's record (since 1894) is 100°F, on May 23, 1925; the coldest is 24°F, on May 10, 1947. The wettest May brought 10.06 in (1989).
Source: records: ACIS, station USC00183348. Records and recent months use complete months only.
How does May in Frederick compare across Maryland?
Across the 26 places PlainClimate covers in Maryland, May normal highs run from 68°F in Frostburg to 78°F in Snow Hill; Frederick's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.