Grimbergen Weather in September

Thinking of visiting Grimbergen in September? Expect pleasant temperatures reaching 21°C (70°F) during the day, dropping to 11°C (52°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Grimbergen in September

Records from the past 30 years suggest around 16 days of rain, with 61 mm (2.4 in) average for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Grimbergen in September

If you're visiting Grimbergen in September, expect perfect temperatures with highs of 21°C (70°F) and overnight lows of 11°C (52°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Grimbergen in September

The month experiences a moderate amount of sunlight, with 142 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Grimbergen in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Grimbergen.

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For a detailed overview over the year and the best time to visit Belgium, check out our Grimbergen's climate page.

Grimbergen Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 52%  

Precipitation 61 mm (2.4 in)  

Rainy days 16 days  

Humidity 77% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 142 hours *  

Percentage Sunshine *  

* Data from: Brussels, Belgium (8 KM, 5 Miles).

What to Wear in Grimbergen in September

For Grimbergen in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Grimbergen in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

10/10

Walking

10/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Belgium, check out our Grimbergen's climate page.

More climate data for Grimbergen

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Grimbergen climate overview or explore weather in Belgium.