BrusselsBelgium · Europe · September

September climate

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September in Brussels

Belgium · Europe

Mild days with cool nights.

Good overall

Early to mid

Daytime high

68°F

Lows around 53°F

Rain

Several rainy days

Sun

5 h/day

Air feel

Comfortable

When to visit

Month-by-month fit

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Temperature

Pleasant by day, brisk at night.

68°Ftypical September high

Typical range

Precipitation

Several rainy days, mostly brief and on-and-off. About 11 wet days, the lowest monthly average.

37%wet-day frequency

AmountWet-day chance

Sunshine

Sunshine is limited, with cloud often dominating.

4.8 hSeptember sunshine

Heat & humidity by month

ComfortableSeptember

Easy airWarm airHot airHumid air

Hourly temperature pattern

In September, afternoons feel about 63° and nights feel near 51°.

FreezingVery coldColdCoolComfortableNight hours

Clear sky

Mostly cloudy skies this month.

38%September Clear sky

Clear skyCloud

Wind pattern

Calm winds are typical in September.

8 mphSeptember Light breeze

More detailIncludes daypart comfort

Typical September day

September late afternoons are around 67°F, easing to about 63°F in early evening.

Avg temp Typical range

Morning58°F

Rain12%

Cloud62%

Humid airLow

Sun intensityLow

Best window

Midday65°F

Rain20%

Cloud67%

Humid airLow

Sun intensityModerate

Late afternoon67°F

Rain20%

Cloud68%

Humid airLow

Sun intensityModerate

Early evening63°F

Rain16%

Cloud64%

Humid airLow

Sun intensityMinimal

Data table

View month-by-month numbers

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	43	35	2.6	12	1.6	87
Feb	46	36	2.4	12	2.7	83
Mar	52	38	2.2	12	3.4	78
Apr	58	42	1.8	11	4.9	72
May	65	49	2.6	12	6.1	74
Jun	71	54	2.7	11	6.2	74
Jul	73	57	2.8	12	6.0	74
Aug	73	57	2.9	13	5.9	76
Sep	68	53	2.2	11	4.8	79
Oct	60	48	2.5	12	3.7	84
Nov	50	41	2.6	13	2.2	88
Dec	44	37	2.8	13	1.4	88

Similar climates

Want a side-by-side climate view? Compare Brussels with Paris.

Climate data notePlanning guidance, not a forecast

Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.

Sunshine: source type is not yet identified at metric level.

Local microclimates can vary by beach, neighborhood, trail, or elevation.

Last updated: Aug 28, 2026

Data & methodology

Month

High°F

Low°F

Rainin

Wet days

Sunh

Humidity%

Jan

2.6

1.6

Feb

2.4

2.7

Mar

2.2

3.4

Apr

1.8

4.9

May

2.6

6.1

Jun

2.7

6.2

Jul

2.8

6.0

Aug

2.9

5.9

Sep

2.2

4.8

Oct

2.5

3.7

Nov

2.6

2.2

Dec

2.8

1.4

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	43	35	2.6	12	1.6	87
Feb	46	36	2.4	12	2.7	83
Mar	52	38	2.2	12	3.4	78
Apr	58	42	1.8	11	4.9	72
May	65	49	2.6	12	6.1	74
Jun	71	54	2.7	11	6.2	74
Jul	73	57	2.8	12	6.0	74
Aug	73	57	2.9	13	5.9	76
Sep	68	53	2.2	11	4.8	79
Oct	60	48	2.5	12	3.7	84
Nov	50	41	2.6	13	2.2	88
Dec	44	37	2.8	13	1.4	88

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	43	35	2.6	12	1.6	87
Feb	46	36	2.4	12	2.7	83
Mar	52	38	2.2	12	3.4	78
Apr	58	42	1.8	11	4.9	72
May	65	49	2.6	12	6.1	74
Jun	71	54	2.7	11	6.2	74
Jul	73	57	2.8	12	6.0	74
Aug	73	57	2.9	13	5.9	76
Sep	68	53	2.2	11	4.8	79
Oct	60	48	2.5	12	3.7	84
Nov	50	41	2.6	13	2.2	88
Dec	44	37	2.8	13	1.4	88

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	43	35	2.6	12	1.6	87
Feb	46	36	2.4	12	2.7	83
Mar	52	38	2.2	12	3.4	78
Apr	58	42	1.8	11	4.9	72
May	65	49	2.6	12	6.1	74
Jun	71	54	2.7	11	6.2	74
Jul	73	57	2.8	12	6.0	74
Aug	73	57	2.9	13	5.9	76
Sep	68	53	2.2	11	4.8	79
Oct	60	48	2.5	12	3.7	84
Nov	50	41	2.6	13	2.2	88
Dec	44	37	2.8	13	1.4	88

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	43	35	2.6	12	1.6	87
Feb	46	36	2.4	12	2.7	83
Mar	52	38	2.2	12	3.4	78
Apr	58	42	1.8	11	4.9	72
May	65	49	2.6	12	6.1	74
Jun	71	54	2.7	11	6.2	74
Jul	73	57	2.8	12	6.0	74
Aug	73	57	2.9	13	5.9	76
Sep	68	53	2.2	11	4.8	79
Oct	60	48	2.5	12	3.7	84
Nov	50	41	2.6	13	2.2	88
Dec	44	37	2.8	13	1.4	88

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	43	35	2.6	12	1.6	87
Feb	46	36	2.4	12	2.7	83
Mar	52	38	2.2	12	3.4	78
Apr	58	42	1.8	11	4.9	72
May	65	49	2.6	12	6.1	74
Jun	71	54	2.7	11	6.2	74
Jul	73	57	2.8	12	6.0	74
Aug	73	57	2.9	13	5.9	76
Sep	68	53	2.2	11	4.8	79
Oct	60	48	2.5	12	3.7	84
Nov	50	41	2.6	13	2.2	88
Dec	44	37	2.8	13	1.4	88

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	43	35	2.6	12	1.6	87
Feb	46	36	2.4	12	2.7	83
Mar	52	38	2.2	12	3.4	78
Apr	58	42	1.8	11	4.9	72
May	65	49	2.6	12	6.1	74
Jun	71	54	2.7	11	6.2	74
Jul	73	57	2.8	12	6.0	74
Aug	73	57	2.9	13	5.9	76
Sep	68	53	2.2	11	4.8	79
Oct	60	48	2.5	12	3.7	84
Nov	50	41	2.6	13	2.2	88
Dec	44	37	2.8	13	1.4	88