Frederick, MD Weather

The climate in this area is characterized by hot, humid summers and generally cool winters. It lies to the west of the fall line, which gives the city slightly lower temperatures compared to locales further east. According to the Köppen Climate Classification system, Frederick has a humid subtropical climate, abbreviated Cfa on climate maps.

Average Temperature
Jan
36 °F
2 °C
Feb
40 °F
5 °C
Mar
46 °F
8 °C
Apr
64 °F
18 °C
May
73 °F
23 °C
Jun
79 °F
26 °C
Jul
86 °F
30 °C
Aug
84 °F
29 °C
Sep
80 °F
27 °C
Oct
64 °F
18 °C
Nov
49 °F
10 °C
Dec
43 °F
6 °C
Humidity
Jan
71%
Feb
69%
Mar
58%
Apr
65%
May
79%
Jun
71%
Jul
75%
Aug
74%
Sep
70%
Oct
75%
Nov
64%
Dec
75%
Rain
Jan
73mm
Feb
60mm
Mar
56mm
Apr
61mm
May
86mm
Jun
102mm
Jul
119mm
Aug
118mm
Sep
23mm
Oct
71mm
Nov
47mm
Dec
68mm
Clouds
Jan
56%
Feb
50%
Mar
43%
Apr
51%
May
44%
Jun
37%
Jul
19%
Aug
35%
Sep
24%
Oct
49%
Nov
38%
Dec
48%
Air quality US AQI
Jan
28
Feb
30
Mar
25
Apr
25
May
26
Jun
29
Jul
32
Aug
32
Sep
26
Oct
21
Nov
25
Dec
29
Sun
Jan
2UVI
Feb
3UVI
Mar
4UVI
Apr
6UVI
May
7UVI
Jun
7UVI
Jul
9UVI
Aug
7UVI
Sep
7UVI
Oct
4UVI
Nov
2UVI
Dec
2UVI