Frederick, MD weather in July
Frederick is warm and often humid in July, with some rain: highs average 84°F and nights drop to about 66°F. Rain falls on about 10 days. This is the peak of the warm season in Frederick.
- Normal high
- 84°F
- Normal low
- 66°F
- Wet days
- 10
- 4.5 in total
- Muggy days
- 16
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 84°F | 84°F |
| Normal low | 65°F | 66°F |
| Chance of a wet day | 33% | 32% |
| Sunrise / sunset | 5:46 am / 8:40 pm | 6:08 am / 8:23 pm |
| Daylight | 14.9 h | 14.3 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 July day
- 6 am67°Fdew point 63°F
- 9 am77°Fdew point 65°F
- Noon83°Fdew point 64°F
- 3 pm85°Fdew point 63°F
- 6 pm82°Fdew point 64°F
- 9 pm74°Fdew point 65°F
NOAA hourly normals (local standard time) from Martinsburg E Wv Rgnl Airport (31 mi away); average wind 5 mph; clear or few clouds in 58% of daytime hours, mostly cloudy or overcast in 30%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F3 of 31
- Hot dayshigh 90°F or more6 of 31
- Muggy daysdaily mean dew point 65°F or more16 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 July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 4.5 in; a dry July brings about 2.5 in and a wet one about 6.1 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How July varies from year to year
- Warmest July, 1991-20202010: average high 89°F
- Coolest July2000: average high 79°F
- Wettest July2018: 10.0 in
- Driest July1997: 1.0 in
- Highest reading100°F (July 22, 2011)
- Lowest reading49°F (July 31, 1997)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 80°F | 84°F | 83°F |
| Normal low | 62°F | 66°F | 65°F |
| Wet days | 11 | 10 | 10 |
| Comfortable days | 9 | 3 | 5 |
| Daylight | 14.9 h | 14.6 h | 13.7 h |
Highs change by +4°F from June and -1°F into August.
Nearby alternatives in July
- Warmer: Washington, DC41 mi · high 90°F · 11 wet days
How Frederick ranks in July
- Normal high245th warmest of 378 cities; 2nd of 3 in Maryland
- Wet days214th driest of 378
- Comfortable days145th most of 340
What to pack for Frederick in July
- A rain jacket or umbrella – rain on about 10 days
- Sunglasses and sunscreen – about 14.6 hours of daylight and highs near 84°F
Heating and cooling
July has 1 heating degree days and 315 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Frederick in July?
The normal high is 84°F and the normal low is 66°F. From 1991 to 2020 the hottest July reading was 100°F (July 22, 2011).
Does it rain a lot in Frederick in July?
About 10 days in July have at least 0.01 in of precipitation, and the normal total is 4.5 in. The wettest July in 1991-2020 was in 2018 (10.0 in); the driest was in 1997 (1.0 in).
Is July a good time to visit Frederick?
July ranks 7th of 12 months on our comfort score for Frederick (54 out of 100). It has about 3 comfortable days and about 6 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.