Dover weather in May: Dover, Delaware: normal highs, lows, rain and records for May
Dover in May has a normal high of 74°F and a normal low of 54°F, a daily mean of 64°F, rising from 71°F on the 1st to 78°F by the 31st. Measurable precipitation falls on 11 days in a normal May, 3.89 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 12°C, 99 mm of precipitation in May.
- NOAA stationDover
- Station IDUSC00072730
- Location39.15°N 75.51°W
- Elevation30 ft (9 m)
- Population40,191
- Jan 44° 28°
- Feb 47° 29°
- Mar 55° 35°
- Apr 66° 45°
- May 74° 54°
- Jun 83° 64°
- Jul 87° 69°
- Aug 85° 67°
- Sep 79° 61°
- Oct 69° 50°
- Nov 58° 39°
- Dec 49° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Dover in May?
The normal high is 74°F and the normal low 54°F, for a daily mean of 64.4°F. May is 8.9°F warmer than April and 8.8°F cooler than June. May is the 5th warmest month of the year in Dover and the 8th wettest. Across the month the normal high rises 7°F, from 71°F on May 1 to 78°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 61°F and 68°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 71°F | 50°F | 34% | 23% |
| May 8 | 73°F | 52°F | 34% | 22% |
| May 15 | 74°F | 54°F | 34% | 22% |
| May 22 | 76°F | 56°F | 34% | 23% |
| May 31 | 78°F | 59°F | 34% | 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 | 71°F | 50°F | 34% | 23% | 13 h 50 min |
| May 2 | 71°F | 50°F | 34% | 23% | 13 h 50 min |
| May 3 | 72°F | 51°F | 34% | 23% | 13 h 50 min |
| May 4 | 72°F | 51°F | 34% | 22% | 14 h |
| May 5 | 72°F | 51°F | 34% | 22% | 14 h |
| May 6 | 72°F | 52°F | 34% | 22% | 14 h |
| May 7 | 73°F | 52°F | 34% | 22% | 14 h |
| May 8 | 73°F | 52°F | 34% | 22% | 14 h |
| May 9 | 73°F | 52°F | 34% | 22% | 14 h 10 min |
| May 10 | 73°F | 53°F | 33% | 22% | 14 h 10 min |
| May 11 | 73°F | 53°F | 33% | 22% | 14 h 10 min |
| May 12 | 74°F | 53°F | 33% | 22% | 14 h 10 min |
| May 13 | 74°F | 54°F | 34% | 22% | 14 h 10 min |
| May 14 | 74°F | 54°F | 34% | 22% | 14 h 20 min |
| May 15 | 74°F | 54°F | 34% | 22% | 14 h 20 min |
| May 16 | 74°F | 54°F | 34% | 22% | 14 h 20 min |
| May 17 | 75°F | 55°F | 34% | 23% | 14 h 20 min |
| May 18 | 75°F | 55°F | 34% | 23% | 14 h 20 min |
| May 19 | 75°F | 55°F | 34% | 23% | 14 h 20 min |
| May 20 | 75°F | 56°F | 34% | 23% | 14 h 30 min |
| May 21 | 75°F | 56°F | 34% | 22% | 14 h 30 min |
| May 22 | 76°F | 56°F | 34% | 23% | 14 h 30 min |
| May 23 | 76°F | 56°F | 34% | 23% | 14 h 30 min |
| May 24 | 76°F | 57°F | 34% | 23% | 14 h 30 min |
| May 25 | 76°F | 57°F | 34% | 23% | 14 h 30 min |
| May 26 | 77°F | 57°F | 34% | 23% | 14 h 40 min |
| May 27 | 77°F | 58°F | 34% | 23% | 14 h 40 min |
| May 28 | 77°F | 58°F | 34% | 23% | 14 h 40 min |
| May 29 | 77°F | 58°F | 34% | 23% | 14 h 40 min |
| May 30 | 78°F | 59°F | 34% | 23% | 14 h 40 min |
| May 31 | 78°F | 59°F | 34% | 23% | 14 h 40 min |
- Normal high
- 74°FMay average
- Normal low
- 54°FMay average
- Precipitation
- 3.89 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 50 min to 14 h 40 minMay 1 to May 31
- Days at 70°F or more
- 22
- Days at 80°F or more
- 10
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00072730; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Dover in May?
On a given May day the chance of 0.01 inch or more is 34% on average, highest around May 18 (34%). In all, 3.89 in falls on 11 days of a normal May, 1 of them with an inch or more.
In a normal May in Dover, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00072730.
What are the records for May in Dover?
The warmest May temperature on this station's record (since 1893) is 98°F, on May 27, 1914; the coldest is 28°F, on May 12, 1923. The wettest May brought 12.96 in (1948).
The May mean against the 1991-2020 normal of 64.4°F: 2022 65.9°F (+1.5), 2023 62.9°F (−1.5), 2024 66.7°F (+2.3), 2025 66.2°F (+1.8), 2026 64.6°F (+0.2). 4 of 5 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 65.9°F | +1.5°F | 5.01 in |
| 2023 | 62.9°F | −1.5°F | 0.64 in |
| 2024 | 66.7°F | +2.3°F | 2.84 in |
| 2025 | 66.2°F | +1.8°F | 5.68 in |
| 2026 | 64.6°F | +0.2°F | 2.39 in |
Source: records: ACIS, station USC00072730; recent months: ACIS, station USC00072730. Records and recent months use complete months only.
How does May in Dover compare across Delaware?
Across the 6 places PlainClimate covers in Delaware, May normal highs run from 73°F in Greenwood to 76°F in Newark; Dover's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.