Aalst weather in April

In April, Aalst sees average daytime highs of 14°C and overnight lows near 6°C, with 48 mm of rain across 11.9 wet days and about 13.5 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 16°C by the end. The sky is clear or mostly clear about 20% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 36 min at the start of April to 14 h 24 min by month's end. Set against the rest of the year, April is Aalst's 4th-clearest and 7th-windiest month. For the whole year in context, see Aalst's year-round climate.

Daytime high
14°
7th warmest
Overnight low
6th coldest
Rainfall
48 mm
11.9 wet days
Daylight
13 h 36 min
5:57 AM – 7:31 PM
Cloud cover
67%
4th clearest
Wind
13 km/h
7th windiest
Solar energy
4.34 kWh/m²
Travel score
3.9
out of 10

Aalst is city in East Flanders, Belgium.

Density
992/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 16°C by the end.

A typical April day in Aalst reaches about 14°C in the afternoon and slips back to 6°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 20°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1125
2125
3135
4135
5135
6135
7135
8135
9135
10135
11135
12145
13145
14146
15146
16146
17146
18156
19156
20156
21156
22157
23157
24167
25167
26167
27167
28167
29168
30168

How April really feels in Aalst

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Aalst weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6211.918.20.5
Feb / 54111.39.70.8
Mar10° / 5311.20.811.52.4
Apr14° / 4811.9013.53.9
May18° / 6011.9015.35.3
Jun20° / 12°6311.1016.26.0
Jul23° / 14°7012.3015.86.3
Aug22° / 14°7412014.36.3
Sep19° / 12°5510.9012.45.8
Oct15° / 5811.2010.44.2
Nov10° / 6211.70.38.72.0
Dec / 7112.81.17.80.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33565
43466
53466
63367
73466
83466
93367
103367
113466
123466
133565
143565
153565
163565
173565
183466
193466
203466
213466
223466
233367
243367
253367
263367
273268
283268
293268
303169

Chance of precipitation in April

Any precipitation

Aalst gets around 48 mm of rain over 11.9 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
338
438
538
639
739
839
939
1039
1139
1238
1338
1438
1537
1637
1738
1838
1938
2039
2139
2240
2340
2440
2541
2641
2741
2841
2941
3041

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
24991
25991
26991
27991
28991
29991
30982

Wind in April

Winds average 13 km/h in April.

Across April, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 36 min at the start of April to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 108 minutes over April. Sunrise moves from 6:31 AM to 5:29 AM, and sunset from 7:06 PM to 7:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:317:06
212.66:297:08
312.76:277:09
412.86:247:11
512.86:227:13
612.96:207:14
713.06:177:16
813.06:157:17
913.16:137:19
1013.26:117:21
1113.26:087:22
1213.36:067:24
1313.46:047:26
1413.46:027:27
1513.56:007:29
1613.65:577:31
1713.65:557:32
1813.75:537:34
1913.75:517:36
2013.85:497:37
2113.95:477:39
2213.95:457:41
2314.05:437:42
2414.15:417:44
2514.15:387:46
2614.25:367:47
2714.25:347:49
2814.35:337:51
2914.45:317:52
3014.45:297:54

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.34 kWh/m².

For context, solar energy here swings from a low near 0.64 kWh/m² to a high of 5.34 kWh/m² in June across the year — April's 4.34 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.7Moderate
33.8Moderate
43.8Moderate
53.9Moderate
63.9Moderate
74.0Moderate
84.0Bright
94.1Bright
104.1Bright
114.2Bright
124.2Bright
134.3Bright
144.3Bright
154.4Bright
164.4Bright
174.5Bright
184.5Bright
194.5Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in April

Is April a good time to visit Aalst?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.9
Sightseeing
7th-best month of the year
0.1
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Aalst.

What to pack for Aalst in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Aalst sees daytime highs around 14°C and nights near 6°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Aalst in April

The nearest coast averages about 9°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 67 km away) is warmest in August at about 19°C and coldest in February near 6°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan6Bracing
Feb6Bracing
Mar6Bracing
Apr9Bracing
May12Bracing
Jun16Cool
Jul18Cool
Aug19Cool
Sep18Cool
Oct15Bracing
Nov11Bracing
Dec8Bracing

UV index in Aalst in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aalst peaks around June 23 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 23UV 6Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Aalst in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Aalst is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1317 µg/m³Dec 1511 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar17Moderate
Apr17Moderate
May16Moderate
Jun15Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct12Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Aalst?

Aalst sits at 50.9°N, 4.0°E, 12 m above sea level, in Belgium. The nearest listed city is Haaltert, 4.0 km away.

Topography around Aalst

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Aalst.

Within 3 km, the terrain around Aalst has only modest variations in elevation — a maximum elevation change of 34 m around an average of 16 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 116 m; within 80 km, significant variations in elevation — a maximum elevation change of 406 m.

The land around Aalst is covered by artificial surfaces (39%), trees (30%) and grassland (22%) within 3 km, grassland (35%), trees (24%) and cropland (24%) within 16 km, and cropland (37%), grassland (23%) and trees (22%) within 80 km.

3 km
34 m
16 km
116 m
80 km
406 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Haaltert 4.0 km · Lede 5.0 km · Denderleeuw 6.0 km · Lebbeke 10 km · Dendermonde 11 km · Herzele 12 km · Asse 12 km · Ninove 12 km

Belgium travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 81% of US
price level, 2025
GDP per capita
$60,750
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
5.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 608
Religion
Roman Catholic 57%nonbeliever/agnostic 20%atheist 9%Muslim 7%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Aalst (50.936°, 4.0355°, elevation 12 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).