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Weather Averages for
Altona, IL
Latitude: 41°10'N,
Longitude: 90°3'W,
Elevation: 262.1 m,
Distance: 4.22 km
Average temperature
over 30 years |
°C |
9 |
-7 |
-4 |
2 |
9 |
15 |
21 |
23 |
22 |
17 |
11 |
3 |
-4 |
Average high temperature
over 30 years |
°C |
15 |
-2 |
0 |
7 |
15 |
22 |
27 |
29 |
28 |
24 |
17 |
8 |
0 |
Average low temperature
over 30 years |
°C |
3 |
-12 |
-9 |
-3 |
3 |
9 |
15 |
17 |
15 |
11 |
5 |
-1 |
-8 |
Highest recorded temperature
over 110 years |
°C |
43 |
19 |
21 |
30 |
33 |
40 |
40 |
43 |
40 |
38 |
34 |
28 |
20 |
Lowest recorded temperature
over 110 years |
°C |
-33 |
-30 |
-33 |
-24 |
-12 |
-4 |
1 |
6 |
3 |
-5 |
-12 |
-21 |
-32 |
Average number of days above 27°C
over 30 years |
days |
25 |
- |
- |
- |
0.1 |
0.8 |
4.9 |
9.4 |
7 |
2.8 |
0.1 |
- |
- |
Average precipitation
over 30 years |
cm |
95.0 |
3.8 |
3.0 |
7.1 |
10.4 |
9.9 |
10.7 |
10.7 |
9.9 |
10.4 |
7.1 |
6.6 |
5.8 |
Average number of days below -1.5°C
over 30 years |
days |
131 |
28 |
24 |
21 |
7.8 |
0.6 |
- |
- |
- |
0.3 |
4.8 |
18 |
26 |
Average number of days below -17.5°C
over 30 years |
days |
13 |
5.8 |
3.7 |
0.3 |
- |
- |
- |
- |
- |
- |
- |
0.1 |
2.9 |
Average snowfall
over 30 years |
cm |
74.7 |
20.1 |
16.8 |
11.9 |
4.6 |
- |
- |
- |
- |
- |
0.8 |
5.3 |
16.5 |
Most rain reported in a day
over 110 years |
cm |
23.4 |
6.6 |
5.3 |
6.6 |
7.6 |
7.6 |
10.9 |
15.5 |
23.4 |
9.1 |
9.7 |
7.9 |
6.9 |
Most rain reported in a month
over 110 years |
cm |
132.3 |
13.0 |
9.4 |
14.7 |
23.1 |
23.6 |
27.7 |
31.8 |
31.8 |
29.0 |
33.0 |
20.1 |
13.2 |
Least rain reported in a month
over 110 years |
cm |
49.3 |
0.3 |
- |
0.5 |
1.8 |
1.3 |
1.0 |
0.8 |
1.8 |
0.8 |
0.3 |
- |
0.3 |
Heating degree days
over 30 years |
days |
6572 |
1392 |
1120 |
876 |
460 |
182 |
23 |
5 |
11 |
106 |
396 |
765 |
1236 |
Cooling degree days
over 30 years |
days |
889 |
- |
- |
1 |
9 |
60 |
189 |
296 |
225 |
95 |
14 |
- |
- |
Most snow reported in a month
over 110 years |
cm |
131.1 |
85.1 |
56.1 |
54.4 |
36.8 |
- |
- |
- |
- |
3.8 |
15.5 |
22.9 |
45.7 |
Check weather averages for nearby locations (some locations might offer more data):
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