Aalst monthly weather forecast

Monthly weather forecast for Aalst. ℃ Average temperatures % Humidity, precipitation ️ Sunrise and sunset ️ Wind direction and speed

31 August 2026, Monday
+16°C / +20°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+17°C
8.3
93%
1009
01:00
+17°C
17.3
85%
1009
02:00
+18°C
10.8
87%
1009
03:00
+16°C
12.6
92%
1008
04:00
+16°C
18.7
91%
1008
05:00
+16°C
18.7
92%
1008
06:00
+16°C
19.8
92%
1008
07:00
+16°C
23.4
89%
1008
08:00
+17°C
22.3
83%
1008
09:00
+16°C
24.8
88%
1008
10:00
+16°C
25.9
88%
1008
11:00
+18°C
28.4
82%
1008
12:00
+17°C
24.8
89%
1009
13:00
+18°C
28.8
84%
1009
14:00
+18°C
24.1
88%
1010
15:00
+17°C
18
92%
1010
16:00
+20°C
24.1
74%
1011
17:00
+19°C
20.9
87%
1011
18:00
+19°C
20.5
81%
1012
19:00
+19°C
18.4
81%
1013
20:00
+19°C
12.6
83%
1013
21:00
+17°C
15.5
91%
1014
22:00
+17°C
17.3
91%
1015
23:00
+17°C
15.5
92%
1016
01 September 2026, Tuesday
+14°C / +21°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+16°C
15.5
93%
1016
01:00
+16°C
15.1
95%
1016
02:00
+16°C
14.4
95%
1016
03:00
+16°C
13.3
96%
1016
04:00
+15°C
12.2
96%
1016
05:00
+16°C
10.1
95%
1017
06:00
+16°C
8.6
96%
1017
07:00
+15°C
10.8
97%
1017
08:00
+15°C
10.1
95%
1018
09:00
+17°C
11.5
90%
1018
10:00
+17°C
13.7
86%
1018
11:00
+19°C
13.7
77%
1019
12:00
+19°C
11.5
71%
1019
13:00
+20°C
11.9
66%
1019
14:00
+19°C
10.4
65%
1020
15:00
+20°C
9.4
60%
1019
16:00
+21°C
10.1
57%
1019
17:00
+21°C
11.2
56%
1019
18:00
+21°C
10.1
55%
1019
19:00
+20°C
10.8
58%
1019
20:00
+19°C
7.9
66%
1019
21:00
+16°C
6.1
70%
1020
22:00
+15°C
6.1
77%
1020
23:00
+14°C
7.6
81%
1020
02 September 2026, Wednesday
+12°C / +21°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+14°C
7.6
84%
1020
01:00
+13°C
7.2
86%
1020
02:00
+14°C
7.6
87%
1020
03:00
+14°C
9
87%
1019
04:00
+13°C
9
87%
1019
05:00
+13°C
9.4
90%
1019
06:00
+12°C
9.7
92%
1019
07:00
+12°C
10.8
92%
1019
08:00
+13°C
11.5
88%
1020
09:00
+14°C
11.9
84%
1020
10:00
+16°C
11.5
82%
1020
11:00
+17°C
7.6
78%
1020
12:00
+18°C
9
74%
1020
13:00
+19°C
10.8
69%
1020
14:00
+20°C
13
62%
1020
15:00
+21°C
13.3
60%
1020
16:00
+21°C
16.6
59%
1020
17:00
+20°C
14.8
62%
1020
18:00
+19°C
11.9
66%
1020
19:00
+19°C
9.3
71%
1020
20:00
+18°C
9.3
76%
1019
21:00
+17°C
10.6
79%
1020
22:00
+17°C
12.4
80%
1020
23:00
+17°C
13.6
79%
1020
03 September 2026, Thursday
+16°C / +22°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+17°C
13.9
76%
1020
01:00
+17°C
14.2
77%
1020
02:00
+17°C
15.2
78%
1019
03:00
+16°C
15.3
81%
1019
04:00
+16°C
15.3
82%
1019
05:00
+17°C
16.3
79%
1019
06:00
+17°C
17.2
77%
1018
07:00
+17°C
18.3
78%
1018
08:00
+17°C
19.1
79%
1018
09:00
+18°C
18.5
79%
1019
10:00
+18°C
18.3
80%
1019
11:00
+19°C
15.5
79%
1019
12:00
+20°C
22.8
78%
1018
13:00
+21°C
23.4
78%
1018
14:00
+21°C
21.6
80%
1018
15:00
+21°C
18.3
85%
1018
16:00
+21°C
16.3
84%
1018
17:00
+22°C
22.6
80%
1018
18:00
+22°C
19.9
81%
1018
19:00
+22°C
17.6
81%
1018
20:00
+21°C
16.5
82%
1018
21:00
+20°C
15.7
84%
1018
22:00
+20°C
15.4
87%
1019
23:00
+19°C
15.5
89%
1019
04 September 2026, Friday
+18°C / +24°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+19°C
15.7
90%
1018
01:00
+19°C
16.3
90%
1018
02:00
+19°C
16.7
90%
1018
03:00
+19°C
17
90%
1017
04:00
+19°C
17.3
91%
1017
05:00
+19°C
17.6
92%
1016
06:00
+19°C
17.8
92%
1016
07:00
+18°C
17.8
92%
1016
08:00
+19°C
18.4
91%
1016
09:00
+19°C
19.5
87%
1016
10:00
+21°C
21.2
82%
1016
11:00
+22°C
22.4
78%
1016
12:00
+22°C
22.4
74%
1015
13:00
+23°C
21.8
71%
1015
14:00
+23°C
21.3
69%
1015
15:00
+24°C
21.4
69%
1015
16:00
+24°C
21.7
70%
1014
17:00
+23°C
21.3
71%
1014
18:00
+23°C
19.7
73%
1014
19:00
+22°C
17.4
75%
1014
20:00
+22°C
15.5
78%
1015
21:00
+21°C
14.9
80%
1015
22:00
+20°C
15.1
82%
1015
23:00
+20°C
14.9
85%
1016
05 September 2026, Saturday
+17°C / +22°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+20°C
14
87%
1016
01:00
+19°C
13.1
90%
1016
02:00
+19°C
12.2
92%
1016
03:00
+19°C
11.3
94%
1016
04:00
+19°C
10.3
95%
1017
05:00
+19°C
9.5
94%
1017
06:00
+18°C
8.7
93%
1017
07:00
+18°C
7.8
90%
1018
08:00
+18°C
7.2
86%
1019
09:00
+18°C
7.4
81%
1019
10:00
+19°C
7.7
74%
1020
11:00
+19°C
8.1
69%
1021
12:00
+20°C
7.9
65%
1021
13:00
+21°C
7.4
62%
1021
14:00
+22°C
7
60%
1021
15:00
+22°C
6.9
58%
1021
16:00
+22°C
6.6
57%
1021
17:00
+22°C
6
58%
1021
18:00
+22°C
4.8
63%
1021
19:00
+21°C
3.6
70%
1021
20:00
+20°C
2.9
76%
1021
21:00
+19°C
3.9
79%
1021
22:00
+18°C
5.7
80%
1021
23:00
+17°C
7.2
81%
1022
06 September 2026, Sunday
+14°C / +28°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+17°C
6.3
83%
1021
01:00
+16°C
7.6
85%
1021
02:00
+16°C
8.5
86%
1020
03:00
+15°C
8.8
87%
1020
04:00
+15°C
8.9
89%
1020
05:00
+15°C
8.8
91%
1019
06:00
+14°C
8.4
92%
1019
07:00
+15°C
7.9
92%
1018
08:00
+15°C
7.6
90%
1018
09:00
+17°C
7.2
85%
1017
10:00
+19°C
7
78%
1017
11:00
+21°C
7.1
71%
1016
12:00
+24°C
7.3
65%
1016
13:00
+26°C
7.8
61%
1015
14:00
+27°C
8.3
59%
1015
15:00
+28°C
8.6
59%
1015
16:00
+28°C
9
60%
1014
17:00
+27°C
9.1
63%
1014
18:00
+27°C
9.4
65%
1013
19:00
+26°C
9.8
68%
1013
20:00
+25°C
10.2
71%
1013
21:00
+24°C
10.6
72%
1013
22:00
+23°C
11.1
73%
1013
23:00
+22°C
11.6
73%
1014
07 September 2026, Monday
+16°C / +24°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+21°C
12
74%
1014
01:00
+20°C
12.3
74%
1015
02:00
+19°C
12.6
76%
1015
03:00
+19°C
12.4
79%
1015
04:00
+18°C
12
83%
1015
05:00
+17°C
11.3
87%
1015
06:00
+17°C
10.7
92%
1015
07:00
+16°C
10.4
95%
1015
08:00
+17°C
10.1
96%
1015
09:00
+17°C
10.1
94%
1016
10:00
+18°C
10.3
88%
1016
11:00
+20°C
10.7
82%
1016
12:00
+21°C
11.2
76%
1016
13:00
+22°C
11.4
72%
1016
14:00
+23°C
11.2
70%
1016
15:00
+24°C
10.5
69%
1016
16:00
+24°C
9.2
69%
1016
17:00
+23°C
7.8
71%
1016
18:00
+23°C
6.4
72%
1015
19:00
+23°C
5.1
74%
1015
20:00
+22°C
4.3
76%
1015
21:00
+21°C
4
79%
1015
22:00
+21°C
3.8
82%
1015
23:00
+20°C
4
86%
1015
08 September 2026, Tuesday
+16°C / +26°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+19°C
4.1
90%
1015
01:00
+18°C
4.4
93%
1015
02:00
+17°C
4.6
96%
1015
03:00
+17°C
4.8
97%
1014
04:00
+16°C
5.4
99%
1014
05:00
+16°C
5.9
99%
1014
06:00
+16°C
6.6
99%
1013
07:00
+16°C
7.3
98%
1013
08:00
+16°C
7.7
95%
1012
09:00
+17°C
8
90%
1012
10:00
+19°C
8.3
84%
1011
11:00
+21°C
8.5
77%
1011
12:00
+23°C
8.6
72%
1010
13:00
+25°C
8.7
67%
1010
14:00
+26°C
8.8
65%
1010
15:00
+26°C
8.9
64%
1009
16:00
+25°C
9.3
65%
1009
17:00
+24°C
9.8
67%
1009
18:00
+23°C
10.5
69%
1008
19:00
+22°C
11.1
71%
1008
20:00
+21°C
11.6
73%
1008
21:00
+21°C
11.7
74%
1008
22:00
+20°C
11.8
76%
1008
23:00
+20°C
11.8
76%
1008
09 September 2026, Wednesday
+16°C / +19°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+19°C
12
78%
1008
01:00
+19°C
12.4
78%
1007
02:00
+19°C
13
79%
1007
03:00
+19°C
13.9
81%
1007
04:00
+18°C
14.9
82%
1007
05:00
+18°C
16
84%
1006
06:00
+18°C
17
85%
1006
07:00
+18°C
17.6
85%
1006
08:00
+19°C
17.9
84%
1006
09:00
+19°C
17.5
81%
1006
10:00
+19°C
16.7
76%
1006
11:00
+19°C
15.5
71%
1006
12:00
+19°C
14.6
67%
1007
13:00
+19°C
13.7
63%
1007
14:00
+19°C
13.1
61%
1007
15:00
+19°C
13.1
60%
1007
16:00
+19°C
13.2
61%
1007
17:00
+18°C
13.5
62%
1007
18:00
+18°C
13.9
64%
1006
19:00
+18°C
14.2
66%
1006
20:00
+17°C
14.3
68%
1006
21:00
+17°C
14.1
71%
1006
22:00
+16°C
13.8
75%
1006
23:00
+16°C
13.5
79%
1006
10 September 2026, Thursday
+14°C / +18°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+15°C
13.2
84%
1006
01:00
+15°C
12.8
88%
1007
02:00
+15°C
12.6
91%
1007
03:00
+14°C
12.2
93%
1007
04:00
+14°C
12.2
93%
1007
05:00
+14°C
11.8
93%
1007
06:00
+14°C
11.5
92%
1007
07:00
+14°C
11.2
91%
1007
08:00
+15°C
10.6
89%
1007
09:00
+15°C
9.9
86%
1007
10:00
+16°C
9.1
83%
1007
11:00
+16°C
8.3
80%
1008
12:00
+17°C
7.7
77%
1008
13:00
+18°C
7.1
74%
1008
14:00
+18°C
6.6
73%
1008
15:00
+18°C
5.8
73%
1008
16:00
+18°C
4.8
73%
1008
17:00
+18°C
3.6
74%
1008
18:00
+18°C
2.6
75%
1008
19:00
+17°C
1.5
77%
1008
20:00
+17°C
1
79%
1008
21:00
+16°C
0.6
81%
1008
22:00
+16°C
0.5
84%
1008
23:00
+15°C
0.4
87%
1009
11 September 2026, Friday
+12°C / +18°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+14°C
0.6
91%
1009
01:00
+13°C
1
94%
1009
02:00
+13°C
1.8
96%
1009
03:00
+13°C
2.8
97%
1009
04:00
+12°C
4
98%
1009
05:00
+12°C
5.5
99%
1009
06:00
+12°C
6.9
99%
1009
07:00
+13°C
8.4
97%
1009
08:00
+13°C
9.6
95%
1009
09:00
+14°C
10.9
91%
1009
10:00
+14°C
12.3
86%
1009
11:00
+15°C
13.6
80%
1009
12:00
+16°C
14.8
75%
1009
13:00
+17°C
15.6
71%
1009
14:00
+18°C
15.9
68%
1009
15:00
+18°C
15.5
66%
1009
16:00
+18°C
14.6
65%
1009
17:00
+18°C
13.5
65%
1009
18:00
+18°C
12.5
65%
1009
19:00
+17°C
11.5
66%
1009
20:00
+17°C
10.9
67%
1010
21:00
+16°C
10.6
69%
1010
22:00
+16°C
10.3
72%
1011
23:00
+15°C
10.1
76%
1011
12 September 2026, Saturday
+11°C / +18°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+15°C
9.9
81%
1012
01:00
+14°C
9.4
85%
1013
02:00
+13°C
9
88%
1013
03:00
+13°C
8.2
91%
1014
04:00
+12°C
6.9
94%
1014
05:00
+12°C
5.6
97%
1014
06:00
+11°C
4.5
98%
1014
07:00
+11°C
3.7
99%
1014
08:00
+11°C
3.1
96%
1015
09:00
+12°C
2.9
90%
1015
10:00
+13°C
3.3
82%
1015
11:00
+15°C
4.6
73%
1016
12:00
+16°C
6.3
65%
1016
13:00
+17°C
7.8
60%
1016
14:00
+18°C
8.6
56%
1016
15:00
+18°C
8.7
56%
1017
16:00
+18°C
8.5
56%
1017
17:00
+18°C
8.1
58%
1016
18:00
+17°C
8
60%
1016
19:00
+17°C
7.8
63%
1016
20:00
+16°C
7.9
65%
1016
21:00
+16°C
8.1
68%
1017
22:00
+15°C
8.4
71%
1017
23:00
+14°C
8.9
75%
1017
13 September 2026, Sunday
+10°C / +19°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+13°C
9.7
79%
1017
01:00
+13°C
10.3
82%
1018
02:00
+12°C
10.9
85%
1018
03:00
+12°C
11.1
88%
1018
04:00
+11°C
11.1
90%
1018
05:00
+11°C
11
93%
1018
06:00
+10°C
10.7
94%
1018
07:00
+10°C
10.7
93%
1018
08:00
+11°C
11.1
90%
1018
09:00
+12°C
11.9
85%
1018
10:00
+13°C
13
76%
1018
11:00
+15°C
14.4
67%
1018
12:00
+17°C
15.9
60%
1017
13:00
+18°C
17.2
54%
1017
14:00
+19°C
18
50%
1017
15:00
+19°C
18.2
49%
1017
16:00
+19°C
17.9
48%
1016
17:00
+19°C
17.5
49%
1016
18:00
+18°C
17
50%
1015
19:00
+17°C
16.7
51%
1015
20:00
+17°C
16.8
54%
1014
21:00
+16°C
17.5
58%
1014
22:00
+16°C
18.6
63%
1013
23:00
+15°C
20
70%
1013


Climate Characteristics of Aalst

General Overview

Aalst enjoys a temperate oceanic climate (Cfb per the Köppen classification), typical of central Belgium. The city's weather is influenced by its relative proximity to the North Sea, resulting in mild temperatures throughout the year and precipitation spread fairly evenly across seasons. Cloud cover is high and rain can occur at any time, keeping the agricultural surroundings of the city green and fertile.

Summer Season and Warm Months

Summer in Aalst is pleasant and very comfortable. Average daytime temperatures range between 22°C and 23°C (72-73°F), making it an ideal time for walking tours in the historic city center. Although days are mostly sunny, short summer showers are a common sight, and occasionally short heatwaves strike the area, pushing temperatures above 30°C (86°F).

Winter Season and Precipitation

Winter in Aalst is cool, grey, and humid. Daytime temperatures range around 6°C (43°F), with nighttime lows near 1°C (34°F). Snow is not very common and usually melts quickly, while rain and fog are central features of the season. Westerly winds from the ocean can increase the wind chill on clear days.

Transition Seasons and Special Phenomena

The transition seasons in Aalst are characterized by frequent weather changes. Spring brings gradual warming but is very volatile, while autumn features a decrease in sunshine hours and beautiful foliage along the banks of the Dender River. February is sometimes known for particularly stormy weather, coinciding with the famous Aalst Carnival.

 

Weather in Aalst by Month

January

The coldest month. Temperatures around 6°C (43°F) during the day and 1°C (34°F) at night. Most days are cloudy and rainy.

February

The weather remains cold with a daytime average of 7°C (45°F). Strong winds and rain are possible, but days are starting to lengthen.

March

Spring arrives with daytime temperatures of about 11°C (52°F). Volatile weather – sunny moments alongside cold rain showers.

April

Temperatures climb to 15°C (59°F). Blossoms are seen throughout the city and the atmosphere becomes more pleasant.

May

A very pleasant month with an average temperature of 19°C (66°F). Days are long and bright, and nature is at peak bloom.

June

Summer begins with an average of 21°C (70°F) during the day. Daylight hours are very long and evenings are pleasant.

July

The warmest month (average 23°C/73°F daytime). Comfortable weather that usually does not become oppressive.

August

Similar to July with 23°C (73°F) during the day. Brief afternoon thunderstorms may occur.

September

Temperatures drop to an average of 20°C (68°F). The air is very pleasant and foliage begins to appear.

October

Autumn is felt with 15°C (59°F) during the day. A wetter and cooler month, but the city is beautiful in its autumnal hues.

November

A grey and cool month with 10°C (50°F) during the day. Sunshine hours decrease significantly and rain is frequent.

December

Winter returns with 6°C (43°F) during the day. Christmas markets and lights add warmth to the short, humid days.

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