Baltimore, MD weather in August
In August, Baltimore sees highs around 87°F and lows around 66°F: warm and often humid, with some rain. There are about 10 days with rain. It is one of the warmest months in Baltimore.
- Normal high
- 87°F
- Normal low
- 66°F
- Wet days
- 10
- 4.1 in total
- Muggy days
- 17
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 88°F | 85°F |
| Normal low | 67°F | 64°F |
| Chance of a wet day | 33% | 28% |
| Sunrise / sunset | 6:06 am / 8:18 pm | 6:34 am / 7:39 pm |
| Daylight | 14.2 h | 13.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am68°Fdew point 65°F
- 9 am77°Fdew point 65°F
- Noon83°Fdew point 64°F
- 3 pm84°Fdew point 64°F
- 6 pm80°Fdew point 65°F
- 9 pm74°Fdew point 66°F
NOAA hourly normals (local standard time) from Baltimore Wash Intl Airport (9 mi away); average wind 5 mph; clear or few clouds in 45% of daytime hours, mostly cloudy or overcast in 37%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph20 of 31
- Hot dayshigh 90°F or more8 of 31
- Muggy daysdaily mean dew point 65°F or more17 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 4.1 in; a dry August brings about 2.5 in and a wet one about 4.7 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20201995: average high 90°F
- Coolest August2000: average high 82°F
- Wettest August2020: 11.8 in
- Driest August1998: 0.9 in
- Highest reading102°F (August 8, 2007)
- Lowest reading49°F (August 20, 1998)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 89°F | 87°F | 80°F |
| Normal low | 68°F | 66°F | 59°F |
| Wet days | 10 | 10 | 9 |
| Comfortable days | 1 | 2 | 11 |
| Daylight | 14.6 h | 13.7 h | 12.4 h |
Highs change by -2°F from July and -7°F into September.
Nearby alternatives in August
- Cooler: Stamford, CT203 mi · high 81°F · 11 wet days
How Baltimore ranks in August
- Normal high182nd warmest of 378 cities; 1st of 3 in Maryland
- Wet days235th driest of 378
- Comfortable days181st most of 341
What to pack for Baltimore in August
- Light, breathable clothing – highs near 87°F and about 17 muggy days
- A rain jacket or umbrella – rain on about 10 days
- A swimsuit – about 20 beach days
Heating and cooling
August has 1 heating degree days and 346 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How hot is Baltimore in August?
The normal high is 87°F and the normal low is 66°F. From 1991 to 2020 the hottest August reading was 102°F (August 8, 2007).
Does it rain a lot in Baltimore in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 4.1 in. The wettest August in 1991-2020 was in 2020 (11.8 in); the driest was in 1998 (0.9 in).
Is August a good time to visit Baltimore?
August ranks 8th of 12 months on our comfort score for Baltimore (49 out of 100). It has about 2 comfortable days and about 8 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and humidity and wind by hour: Baltimore Wash Intl Airport (USW00093721), 9.4 mi SSW of the city center, 156 ft (120 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Md Sci Ctr Baltimore (USW00093784), 0.7 mi SSE of the city center, 20 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Camp Springs Andrews AFB (USW00013705), 36 mi SSW of the city center, 282 ft (246 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Baltimore-Washington Intl Airport (724060-93721), 9.0 mi SSW of the city center, 138 ft (102 ft higher than the city). Hourly observations, 1991-2020.