Baltimore · August
Run in the morning.
Comfortable average high of 84°F, dipping to 69°F at night. Humidity averages 75% — the limiting factor on most runs. Expect 18 rain days — plan around the radar. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
84° / 69°F
Humidity
75%
Rain days
18/mo
Wind
9 mph
What August feels like in Baltimore
Sunrise
06:20
Mid-month average
Sunset
19:60
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Baltimore in August
The kit for August in Baltimore: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
August vs the surrounding months
vs July
-2° avg high
-1 rain days
Baltimore in July →
August
84°F avg high
18 rain days
Best: morning
vs September
+5° avg high
+4 rain days
Baltimore in September →
Frequently Asked Questions
What is the best time of day to run in Baltimore in August?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Baltimore in August?+
Average high 84°F, average low 69°F.
How does August compare to surrounding months in Baltimore?+
Compared to July (avg high 86°F), August is cooler. Compared to September (avg high 79°F), August is warmer.
Does it rain often in Baltimore in August?+
Expect about 18 measurable rain days in August, on average.