Frederick, MD weather in August
Expect warm, often humid weather with some rain in Frederick in August, with highs near 83°F and lows near 65°F. Rain falls on about 10 days. It is one of the warmest months in Frederick.
- Normal high
- 83°F
- Normal low
- 65°F
- Wet days
- 10
- 4.2 in total
- Muggy days
- 13
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 84°F | 81°F |
| Normal low | 66°F | 62°F |
| Chance of a wet day | 32% | 29% |
| Sunrise / sunset | 6:09 am / 8:22 pm | 6:37 am / 7:42 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 am65°Fdew point 62°F
- 9 am74°Fdew point 64°F
- Noon81°Fdew point 63°F
- 3 pm83°Fdew point 62°F
- 6 pm80°Fdew point 63°F
- 9 pm72°Fdew point 64°F
NOAA hourly normals (local standard time) from Martinsburg E Wv Rgnl Airport (31 mi away); average wind 4 mph; clear or few clouds in 57% of daytime hours, mostly cloudy or overcast in 31%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F5 of 31
- Hot dayshigh 90°F or more4 of 31
- Muggy daysdaily mean dew point 65°F or more13 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in7 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 4.2 in; a dry August brings about 3.1 in and a wet one about 5.5 in (25th and 75th percentiles). About 2 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 86°F
- Coolest August2013: average high 78°F
- Wettest August2011: 8.0 in
- Driest August2006: 0.3 in
- Highest reading98°F (August 16, 1997)
- Lowest reading46°F (August 7, 1994)
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 | 84°F | 83°F | 76°F |
| Normal low | 66°F | 65°F | 58°F |
| Wet days | 10 | 10 | 9 |
| Comfortable days | 3 | 5 | 14 |
| Daylight | 14.6 h | 13.7 h | 12.4 h |
Highs change by -1°F from July and -7°F into September.
Nearby alternatives in August
- Warmer: Washington, DC41 mi · high 88°F · 9 wet days
How Frederick ranks in August
- Normal high262nd warmest of 378 cities; 2nd of 3 in Maryland
- Wet days223rd driest of 378
- Comfortable days138th most of 341
What to pack for Frederick in August
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 3 heating degree days and 270 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Frederick in August?
The normal high is 83°F and the normal low is 65°F. From 1991 to 2020 the hottest August reading was 98°F (August 16, 1997).
Does it rain a lot in Frederick in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 4.2 in. The wettest August in 1991-2020 was in 2011 (8.0 in); the driest was in 2006 (0.3 in).
Is August a good time to visit Frederick?
August ranks 6th of 12 months on our comfort score for Frederick (55 out of 100). It has about 5 comfortable days and about 4 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Damascus 3 Ssw (USC00182336), 14 mi SE of the city center, 700 ft (417 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Frederick Police Brks (USC00183348), 1.5 mi W of the city center, 380 ft (97 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Martinsburg E Wv Rgnl Airport (USW00013734), 31 mi W of the city center, 534 ft (251 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Etrn Wv Rgnl/Shpherd Fd Airport (724177-13734), 30 mi W of the city center, 541 ft (258 ft higher than the city). Hourly observations, 1991-2020.