| Record high, °C |
10 |
9 |
10 |
10 |
11 |
10 |
10 |
8 |
8 |
7 |
8 |
8 |
11 |
| Average high, °C |
20 |
21 |
22 |
24 |
25 |
23 |
22 |
18 |
16 |
13 |
14 |
16 |
20 |
| Average temperature, °C |
14 |
15 |
17 |
19 |
20 |
19 |
17 |
13 |
10 |
7 |
8 |
10 |
14 |
| Average low, °C |
6 |
8 |
10 |
12 |
13 |
12 |
11 |
7 |
3 |
0 |
0 |
2 |
7 |
| Record low, °C |
-1 |
0 |
0 |
0 |
2 |
2 |
0 |
0 |
-2 |
-2 |
-3 |
-2 |
-3 |
| Rain, days |
1 |
2 |
2 |
2 |
2 |
2 |
2 |
1 |
1 |
1 |
0 |
1 |
14 |
| Fog, days |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
7 |
| Thunderstorms, days |
1 |
1 |
2 |
2 |
2 |
2 |
1 |
1 |
0 |
0 |
0 |
0 |
11 |
| Average precipitation, mm. |
31 |
66 |
86 |
95 |
116 |
101 |
97 |
60 |
25 |
16 |
11 |
20 |
723 |
| Relative humidity, % |
49 |
54 |
57 |
57 |
60 |
64 |
65 |
65 |
59 |
59 |
55 |
49 |
58 |
| Relative humidity morning, % |
23 |
25 |
27 |
26 |
26 |
27 |
26 |
27 |
24 |
20 |
20 |
20 |
24 |
| Relative humidity evening, % |
10 |
12 |
13 |
14 |
14 |
15 |
15 |
14 |
11 |
10 |
10 |
10 |
12 |
| Wind speed, km/h |
14 |
14 |
14 |
13 |
12 |
10 |
9 |
9 |
9 |
10 |
11 |
12 |
11 |
| Day Length, of hours |
12 |
13 |
14 |
15 |
14 |
14 |
13 |
13 |
11 |
11 |
11 |
12 |
13 |
| Dew point, °C |
3 |
6 |
8 |
10 |
12 |
12 |
11 |
7 |
2 |
-0 |
-1 |
-1 |
69 |
| Growing degree-day, °C |
109 |
162 |
207 |
266 |
304 |
248 |
224 |
103 |
16 |
0 |
0 |
8 |
1646 |
| Solar radiation, global, Mj/m2 |
20 |
22 |
24 |
25 |
25 |
23 |
20 |
17 |
15 |
13 |
14 |
17 |
20 |