Baltimore weather in May: Baltimore, Maryland: normal highs, lows, rain and records for May
Baltimore in May has a normal high of 76°F and a normal low of 53°F, a daily mean of 64°F, rising from 72°F on the 1st to 80°F by the 31st. Measurable precipitation falls on 12 days in a normal May, 3.85 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 12°C, 98 mm of precipitation in May.
- NOAA stationBaltimore Wash International Airport
- Station IDUSW00093721
- Location39.17°N 76.68°W
- Elevation156 ft (48 m)
- From the center10 miles
- Population568,271
- Jan 43° 25°
- Feb 46° 27°
- Mar 55° 34°
- Apr 67° 44°
- May 76° 53°
- Jun 84° 63°
- Jul 89° 68°
- Aug 87° 66°
- Sep 80° 59°
- Oct 68° 47°
- Nov 57° 37°
- Dec 48° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Baltimore in May?
The normal high is 76°F and the normal low 53°F, for a daily mean of 64.4°F. May is 9.4°F warmer than April and 9.1°F cooler than June. May is the 5th warmest month of the year in Baltimore and the 7th wettest. Across the month the normal high rises 8°F, from 72°F on May 1 to 80°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 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 39%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 72°F | 49°F | 39% | 22% |
| May 8 | 74°F | 51°F | 39% | 23% |
| May 15 | 75°F | 53°F | 39% | 23% |
| May 22 | 77°F | 55°F | 38% | 23% |
| May 31 | 80°F | 58°F | 38% | 24% |
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 | 72°F | 49°F | 39% | 22% | 13 h 50 min |
| May 2 | 72°F | 49°F | 39% | 22% | 13 h 50 min |
| May 3 | 72°F | 49°F | 39% | 22% | 13 h 50 min |
| May 4 | 73°F | 50°F | 39% | 22% | 14 h |
| May 5 | 73°F | 50°F | 39% | 23% | 14 h |
| May 6 | 73°F | 50°F | 39% | 23% | 14 h |
| May 7 | 73°F | 51°F | 39% | 23% | 14 h |
| May 8 | 74°F | 51°F | 39% | 23% | 14 h |
| May 9 | 74°F | 51°F | 39% | 23% | 14 h 10 min |
| May 10 | 74°F | 52°F | 39% | 23% | 14 h 10 min |
| May 11 | 74°F | 52°F | 39% | 23% | 14 h 10 min |
| May 12 | 75°F | 52°F | 39% | 23% | 14 h 10 min |
| May 13 | 75°F | 52°F | 39% | 23% | 14 h 10 min |
| May 14 | 75°F | 53°F | 39% | 23% | 14 h 20 min |
| May 15 | 75°F | 53°F | 39% | 23% | 14 h 20 min |
| May 16 | 75°F | 53°F | 39% | 23% | 14 h 20 min |
| May 17 | 76°F | 54°F | 39% | 23% | 14 h 20 min |
| May 18 | 76°F | 54°F | 39% | 23% | 14 h 20 min |
| May 19 | 76°F | 54°F | 39% | 23% | 14 h 20 min |
| May 20 | 76°F | 55°F | 38% | 23% | 14 h 30 min |
| May 21 | 77°F | 55°F | 38% | 23% | 14 h 30 min |
| May 22 | 77°F | 55°F | 38% | 23% | 14 h 30 min |
| May 23 | 77°F | 55°F | 38% | 23% | 14 h 30 min |
| May 24 | 77°F | 56°F | 38% | 23% | 14 h 30 min |
| May 25 | 78°F | 56°F | 38% | 24% | 14 h 30 min |
| May 26 | 78°F | 56°F | 38% | 24% | 14 h 40 min |
| May 27 | 78°F | 57°F | 38% | 24% | 14 h 40 min |
| May 28 | 79°F | 57°F | 38% | 24% | 14 h 40 min |
| May 29 | 79°F | 57°F | 38% | 24% | 14 h 40 min |
| May 30 | 79°F | 58°F | 38% | 24% | 14 h 40 min |
| May 31 | 80°F | 58°F | 38% | 24% | 14 h 40 min |
- Normal high
- 76°FMay average
- Normal low
- 53°FMay average
- Precipitation
- 3.85 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 2
- 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
- 11
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093721; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Baltimore in May?
On a given May day the chance of 0.01 inch or more is 39% on average, highest around May 8 (39%). In all, 3.85 in falls on 12 days of a normal May, 1 of them with an inch or more.
In a normal May in Baltimore, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093721.
How humid and windy is Baltimore in May?
At 3 p.m. the normal temperature is 77°F with 50% relative humidity and a dew point of 57°F; at 6 a.m. it is 62°F with 84% humidity. The wind averages 6.4 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 62°F | 57°F | 84% | 4.5 mph | – |
| 9 a.m. | 71°F | 58°F | 64% | 7.8 mph | – |
| noon | 76°F | 57°F | 52% | 8.8 mph | – |
| 3 p.m. | 77°F | 57°F | 50% | 9.3 mph | – |
| 6 p.m. | 75°F | 58°F | 55% | 7.9 mph | – |
| 9 p.m. | 68°F | 59°F | 73% | 4.7 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093721. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Baltimore?
The warmest May temperature on Baltimore's official record (since 1872) is 98°F, on May 23, 1925; the coldest is 32°F, on May 11, 1966. The wettest May brought 8.71 in (1989).
The May mean against the 1991-2020 normal of 64.4°F: 2021 64.0°F (−0.5), 2022 66.6°F (+2.2), 2023 62.8°F (−1.6), 2024 66.5°F (+2.1), 2025 66.4°F (+2.0), 2026 63.8°F (−0.6). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.0°F | −0.5°F | 3.63 in |
| 2022 | 66.6°F | +2.2°F | 5.39 in |
| 2023 | 62.8°F | −1.6°F | 0.55 in |
| 2024 | 66.5°F | +2.1°F | 2.76 in |
| 2025 | 66.4°F | +2.0°F | 6.85 in |
| 2026 | 63.8°F | −0.6°F | 4.39 in |
Source: records: ACIS, NWS threaded record BWIthr; recent months: ACIS, station USW00093721. Records and recent months use complete months only.
How does May in Baltimore 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; Baltimore's is 76°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.