Average temperature over 30 years |
°F |
55 |
35 |
38 |
47 |
55 |
63 |
70 |
73 |
72 |
66 |
56 |
47 |
39 |
Average high temperature over 30 years |
°F |
65 |
45 |
48 |
57 |
66 |
74 |
80 |
83 |
82 |
76 |
67 |
57 |
48 |
Average low temperature over 30 years |
°F |
45 |
26 |
28 |
36 |
44 |
52 |
59 |
62 |
62 |
56 |
45 |
37 |
30 |
Highest recorded temperature over 23 years |
°F |
98 |
75 |
78 |
82 |
89 |
89 |
98 |
98 |
98 |
95 |
87 |
82 |
80 |
Lowest recorded temperature over 23 years |
°F |
-7 |
-7 |
-2 |
5 |
24 |
33 |
39 |
48 |
46 |
33 |
23 |
1 |
-5 |
Average number of rainy days over 29 years |
days |
125 |
10 |
9 |
11 |
9 |
12 |
11 |
12 |
13 |
10 |
8 |
9 |
10 |
Average number of days above 90°F over 23 years |
days |
11 |
- |
- |
- |
- |
- |
3 |
4 |
3 |
1 |
- |
- |
- |
Average precipitation over 30 years |
in |
38.0 |
2.5 |
3.3 |
3.9 |
3.1 |
3.6 |
3.3 |
2.9 |
3.8 |
3.2 |
2.8 |
2.9 |
2.8 |
Most recorded rainfall over 23 years |
in |
49.9 |
6.3 |
5.2 |
7.7 |
6.8 |
7.3 |
7.0 |
6.7 |
8.9 |
8.3 |
8.5 |
7.1 |
4.8 |
Least recorded rainfall over 23 years |
in |
30.5 |
1.0 |
0.1 |
1.6 |
1.3 |
0.6 |
0.8 |
1.0 |
1.0 |
0.8 |
- |
0.7 |
0.1 |
Average number of days with thunderstorms over 17 years |
days |
45 |
- |
1 |
2 |
4 |
6 |
8 |
11 |
9 |
3 |
1 |
- |
- |
Average number of days with fog over 17 years |
days |
159 |
9 |
8 |
9 |
8 |
13 |
17 |
20 |
23 |
19 |
16 |
9 |
8 |
Average morning relative humidity over 29 years |
% |
90 |
85 |
83 |
85 |
85 |
92 |
94 |
95 |
97 |
97 |
94 |
88 |
85 |
Average evening relative humidity over 29 years |
% |
58 |
59 |
55 |
53 |
50 |
57 |
59 |
62 |
63 |
63 |
56 |
57 |
59 |
Average wind speed over 29 years |
mph |
7.6 |
9.5 |
9.5 |
9.4 |
8.8 |
7.1 |
6.1 |
5.9 |
5.4 |
5.7 |
6.7 |
8.2 |
8.9 |
Average snowfall over 29 years |
in |
15.6 |
4.6 |
4.6 |
3.0 |
0.7 |
- |
- |
- |
- |
- |
- |
0.7 |
2.0 |
Average number of clear days over 29 years |
days |
101 |
9 |
9 |
9 |
10 |
7 |
6 |
5 |
5 |
7 |
12 |
11 |
10 |
Heating degree days over 30 years |
days |
4246 |
908 |
731 |
546 |
288 |
112 |
8 |
- |
- |
45 |
289 |
525 |
794 |
Cooling degree days over 30 years |
days |
859 |
- |
- |
- |
6 |
62 |
167 |
270 |
242 |
96 |
16 |
- |
- |
Average possibility of sunshine over 29 years |
% |
59 |
55 |
59 |
60 |
65 |
61 |
63 |
60 |
54 |
56 |
61 |
58 |
55 |
Average number of cloudy days over 29 years |
days |
151 |
14 |
13 |
14 |
12 |
14 |
12 |
12 |
12 |
12 |
11 |
12 |
14 |
Average number of partly cloudy days over 29 years |
days |
113 |
8 |
6 |
8 |
8 |
10 |
12 |
14 |
14 |
11 |
8 |
7 |
7 |
Average number of days below 45°F over 23 years |
days |
173 |
29 |
26 |
26 |
15 |
5 |
- |
- |
- |
2 |
15 |
25 |
29 |
Average number of days above 75°F over 23 years |
days |
144 |
- |
- |
2 |
8 |
20 |
26 |
30 |
29 |
20 |
9 |
1 |
- |