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Weather in Aalst
East Flanders, 15 m · continuously updated
Melle (16 km) · 9 °C · KMI/IRM 14:00
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Temperature · last 4 and next 28 hours
Aalst weather: the next 24 hours
Updated hourly.
Aalst 15-day forecast
Two-week trend.
Sun and golden hours
Sunrise –, golden light until –
Sunset –, golden light from –
–
Air quality
European index, modelled by Copernicus (CAMS).
UV index
Daily maximum — protection advised from 3.
Freezing level
Snow settles about 300 m below it.
Around Aalst
Neighbouring towns, as the crow flies.
Official weather warnings
No active warning for East Flanders.
Updated 15 Nov 13:48.
Is there an active weather warning for Aalst?
No active warning for East Flanders.
Latest RMI observation near Aalst
Measured at Melle, 16 km from Aalst: situation as of 15 November 2026, 14:00. Melle is the nearest weather station of the RMI/KMI (Royal Meteorological Institute of Belgium), one of the country's 28 synoptic stations. These are measured values, not a forecast; this page is refreshed three times a day, hence the time shown.
| Situation as of | 15 November 2026, 14:00 |
|---|---|
| Temperature | 8.7 °C |
| Wind | 18 km/h S |
| Gusts | 34 km/h |
| Rain, last hour | 0.0 mm |
| Humidity | 91 % |
| Pressure | 1003 hPa |
Observations from the 28 RMI stations
Source: RMI/KMI (Royal Meteorological Institute of Belgium), open observation data, Creative Commons Attribution 4.0 (CC BY 4.0) licence. The RMI is not liable for any damage resulting from the use of these data. Raw, unvalidated data shown as published, with wind converted from m/s to km/h. Data: opendata.meteo.be · CC BY 4.0
The observed climate near Aalst
The weather station nearest to Aalst, Uccle located 104 m above sea level, is 27 km away; its records cover 1795–2025. In November, the mean temperature there is 7.3 °C over 1991–2020, 1.0 °C more than over 1961–1990 (6.3 °C), with about – mm of rain. The warmest month ever measured is July 2006 (23.5 °C), the coldest February 1956 (−6.2 °C). See the full series of Uccle
Today in Aalst
- No washing outside today: rain, or a risk of rain, covers the hours when it could dry. How it is calculated
- Terrace and barbecue between 18:00 and 23:00: rain likely (1 mm, up to 92 % chance). Have some shelter or a plan B ready. How it is calculated
- Best time to air the house: tomorrow, around 13:00. The outdoor dew point drops to 3.6 °C; once warmed to 20 °C, that air holds only 34 % humidity, against 50 % in a typical home: opening the windows dries the house. How it is calculated
- Garden: 23.5 mm of rain expected within 48 h, against a need of 1.1 mm. No need to water, the rain will do it. How it is calculated
Calculated from Open-Meteo forecasts of 2026-11-15 14:48 (local time): model values, not measurements. All of today's advice
7-day forecast for Aalst
Today (Sunday 15 Nov) in Aalst: heavy drizzle, 2 to 10 °C, precipitation 3.1 mm (92 %), wind up to 25 km/h. Tomorrow: rain, 4 to 9 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Today | heavy drizzle | 2 °C | 10 °C | 3.1 mm | 25 km/h |
| Tomorrow | rain | 4 °C | 9 °C | 4.2 mm | 27 km/h |
| Tue 17 Nov | rain | 4 °C | 14 °C | 19.5 mm | 37 km/h |
| Wed 18 Nov | light drizzle | 8 °C | 12 °C | 2.3 mm | 25 km/h |
| Thu 19 Nov | heavy drizzle | 8 °C | 10 °C | 13.4 mm | 22 km/h |
| Fri 20 Nov | showers | 3 °C | 8 °C | 12.7 mm | 17 km/h |
| Sat 21 Nov | overcast | 1 °C | 10 °C | 0.0 mm | 12 km/h |
Tomorrow's weather in Aalst
Tomorrow, Monday 16 Nov, in Aalst: rain, from 4 to 9 °C, 4.2 mm of precipitation (probability 59 %), wind up to 27 km/h.
| Hour | Weather | Temp. | Precip. | Chance | Wind |
|---|---|---|---|---|---|
| 00:00 |  light drizzle | 9 °C | 0.1 mm | 47 % | 17 km/h |
| 03:00 | light drizzle | 9 °C | 0.1 mm | 54 % | 20 km/h |
| 06:00 | light drizzle | 8 °C | 0.2 mm | 54 % | 20 km/h |
| 09:00 |  overcast | 8 °C | 0.0 mm | 35 % | 23 km/h |
| 12:00 |  partly cloudy | 8 °C | 0.0 mm | 23 % | 24 km/h |
| 15:00 | overcast | 7 °C | 0.0 mm | 11 % | 19 km/h |
| 18:00 | overcast | 5 °C | 0.0 mm | 11 % | 15 km/h |
| 21:00 | overcast | 4 °C | 0.0 mm | 25 % | 8 km/h |
Frequently asked questions
Will it rain tomorrow in Aalst?
Yes: 4.2 mm expected, probability 59 %.
How warm will it be tomorrow in Aalst?
Between 4 and 9 °C.
The weekend
Today, Sunday, in Aalst: heavy drizzle, 2 to 10 °C. Next weekend: Saturday overcast, 1 to 10 °C, Sunday showers, 4 to 9 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Today | heavy drizzle | 2 °C | 10 °C | 3.1 mm | 25 km/h |
| Sat 21 Nov | overcast | 1 °C | 10 °C | 0.0 mm | 12 km/h |
| Sun 22 Nov |  showers | 4 °C | 9 °C | 8.8 mm | 23 km/h |
Hour by hour
The next 48 hours in Aalst, hour by hour: temperature from 4 to 14 °C, 23.5 mm of rain expected.
| Hour | Weather | Temp. | Precip. | Chance | Wind |
|---|---|---|---|---|---|
| 14:00 | overcast | 8 °C | 0.0 mm | 16 % | 24 km/h |
| 15:00 | overcast | 9 °C | 0.0 mm | 36 % | 24 km/h |
| 16:00 | drizzle | 9 °C | 0.8 mm | 55 % | 25 km/h |
| 17:00 | heavy drizzle | 9 °C | 1.2 mm | 71 % | 17 km/h |
| 18:00 | heavy drizzle | 10 °C | 1.0 mm | 85 % | 20 km/h |
| 19:00 | overcast | 10 °C | 0.0 mm | 92 % | 18 km/h |
| 20:00 | overcast | 10 °C | 0.0 mm | 87 % | 18 km/h |
| 21:00 | overcast | 10 °C | 0.0 mm | 74 % | 18 km/h |
| 22:00 | overcast | 10 °C | 0.0 mm | 63 % | 19 km/h |
| 23:00 | overcast | 10 °C | 0.0 mm | 54 % | 17 km/h |
| 00:00 | light drizzle | 9 °C | 0.1 mm | 47 % | 17 km/h |
| 01:00 | light drizzle | 9 °C | 0.1 mm | 43 % | 18 km/h |
| 02:00 | light drizzle | 9 °C | 0.1 mm | 47 % | 17 km/h |
| 03:00 | light drizzle | 9 °C | 0.1 mm | 54 % | 20 km/h |
| 04:00 | rain | 9 °C | 3.2 mm | 59 % | 24 km/h |
| 05:00 | light drizzle | 9 °C | 0.3 mm | 58 % | 27 km/h |
| 06:00 | light drizzle | 8 °C | 0.2 mm | 54 % | 20 km/h |
| 07:00 | light drizzle | 8 °C | 0.1 mm | 49 % | 24 km/h |
| 08:00 | overcast | 8 °C | 0.0 mm | 43 % | 23 km/h |
| 09:00 | overcast | 8 °C | 0.0 mm | 35 % | 23 km/h |
| 10:00 | overcast | 7 °C | 0.0 mm | 29 % | 23 km/h |
| 11:00 | overcast | 7 °C | 0.0 mm | 25 % | 22 km/h |
| 12:00 | partly cloudy | 8 °C | 0.0 mm | 23 % | 24 km/h |
| 13:00 | overcast | 8 °C | 0.0 mm | 20 % | 23 km/h |
| 14:00 |  sunny | 8 °C | 0.0 mm | 16 % | 21 km/h |
| 15:00 | overcast | 7 °C | 0.0 mm | 11 % | 19 km/h |
| 16:00 | sunny | 7 °C | 0.0 mm | 8 % | 16 km/h |
| 17:00 | overcast | 6 °C | 0.0 mm | 8 % | 14 km/h |
| 18:00 | overcast | 5 °C | 0.0 mm | 11 % | 15 km/h |
| 19:00 | overcast | 4 °C | 0.0 mm | 14 % | 11 km/h |
| 20:00 | overcast | 4 °C | 0.0 mm | 19 % | 8 km/h |
| 21:00 | overcast | 4 °C | 0.0 mm | 25 % | 8 km/h |
| 22:00 | overcast | 4 °C | 0.0 mm | 31 % | 7 km/h |
| 23:00 | overcast | 5 °C | 0.0 mm | 36 % | 7 km/h |
| 00:00 | drizzle | 4 °C | 0.6 mm | 40 % | 9 km/h |
| 01:00 | light rain | 5 °C | 1.5 mm | 45 % | 9 km/h |
| 02:00 | light rain | 5 °C | 2.3 mm | 49 % | 14 km/h |
| 03:00 | light rain | 5 °C | 1.4 mm | 53 % | 20 km/h |
| 04:00 | rain | 5 °C | 2.6 mm | 59 % | 20 km/h |
| 05:00 | light rain | 5 °C | 2.0 mm | 69 % | 25 km/h |
| 06:00 | rain | 5 °C | 3.0 mm | 80 % | 20 km/h |
| 07:00 | light rain | 6 °C | 1.5 mm | 88 % | 18 km/h |
| 08:00 | drizzle | 6 °C | 0.5 mm | 91 % | 13 km/h |
| 09:00 | light drizzle | 6 °C | 0.2 mm | 91 % | 8 km/h |
| 10:00 | overcast | 7 °C | 0.0 mm | 90 % | 4 km/h |
| 11:00 | overcast | 11 °C | 0.0 mm | 89 % | 17 km/h |
| 12:00 | light drizzle | 13 °C | 0.4 mm | 88 % | 23 km/h |
| 13:00 | light drizzle | 14 °C | 0.3 mm | 86 % | 28 km/h |
Location of Aalst
Aalst lies at 15 m, 5 m below the average of the 55 places we cover in the province of East Flanders (20 m). That makes it the 22nd highest of the 55. The main town, Ghent, lies 26 km to the north-west. The nearest places we cover are Erpe-Mere (5 km to the west), Denderleeuw (6 km to the south), Affligem (6 km to the south-east) and Haaltert (7 km to the south-west). With about 86,445 inhabitants according to GeoNames, Aalst is the 3rd largest of the 52 places we cover in the province of East Flanders. Of the places of interest on this site, the nearest are Atomium (sight, 22 km to the east) and Boom, Tomorrowland (circuit or festival, 29 km to the north-east).
Today is close to the November normal (10.5 °C).
Climate of Aalst: 1991–2020 normals
In Aalst, July is typically the warmest month (up to 23.8 °C on average), while January is the coldest at 2.0 °C. August sees the most rain, with around 92 mm.
By season (average highs, 1991–2020 normals): winter 7.2 °C and 224 mm of rain, spring 15.3 °C and 161 mm, summer 23.0 °C and 241 mm, autumn 15.4 °C and 212 mm. The wettest season is summer (29 % of the annual total), the driest spring (19 %).
| Max T (°C) | Min T (°C) | Rainfall (mm) | Rainy days | |
|---|---|---|---|---|
| January | 6.7 | 2.0 | 75 | 14 |
| February | 7.8 | 2.0 | 62 | 12 |
| March | 11.5 | 4.1 | 55 | 12 |
| April | 15.5 | 6.5 | 48 | 12 |
| May | 18.9 | 9.9 | 59 | 12 |
| June | 21.7 | 12.9 | 70 | 12 |
| July | 23.8 | 14.9 | 79 | 13 |
| August | 23.5 | 14.5 | 92 | 14 |
| September | 20.1 | 11.7 | 68 | 12 |
| October | 15.5 | 8.6 | 71 | 12 |
| November | 10.5 | 5.1 | 73 | 13 |
| December | 7.1 | 2.5 | 86 | 14 |
Compared with Ghent, the main town 26 km to the north-west, highs in the warmest month are 1.0 °C higher here, and the year brings 52 mm more precipitation. In no month does the average low fall below 0 °C; in 4 months the average high exceeds 20 °C (June, July, August and September).
The nearest neighbouring places, Denderleeuw, Lede and Lebbeke, have almost identical normals. Among the 55 places we cover in the province of East Flanders whose normals come from the ERA5 reanalysis, Aalst ranks 2nd for summer warmth and 3rd for annual precipitation. The warmest summers are in Ninove and the coolest in Sint-Laureins; the wettest year is in Ninove and the driest in Maldegem, Eeklo and Sint-Laureins.
What is the warmest month in Aalst?
The warmest month in Aalst is typically July, averaging 23.8 °C (1991–2020 normal). The coldest is January, at 2.0 °C.
How many rainy days does Aalst get per year?
Aalst sees about 150 rainy days a year, adding up to roughly 838 mm of rainfall (1991–2020 normals).
How big is the gap between summer and winter in Aalst?
Between July and January, the temperature gap in Aalst runs to about 21.8 °C, based on the 1991–2020 normals.