South London weather in September 2025

The temperatures in South London in September are usually low and can range between 12°C and 20°C.

You can expect about 3 to 8 days of rain in South London during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in South London in September 2025.

If you’re planning to visit South London in the near future, we highly recommend that you review the 14 day weather forecast for South London before you arrive.

Temperatures

20° / 12°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

9.0

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 21° /14°	2 22° /15°	3 23° /15°	4 21° /15°	5 21° /14°	6 23° /15°
7 24° /15°	8 23° /15°	9 21° /16°	10 22° /15°	11 20° /14°	12 21° /13°	13 20° /14°
14 24° /14°	15 22° /14°	16 21° /15°	17 20° /13°	18 20° /13°	19 21° /14°	20 20° /14°
21 22° /13°	22 21° /14°	23 19° /13°	24 19° /13°	25 18° /13°	26 18° /12°	27 16° /11°
28 17° /10°	29 17° /12°	30 17° /11°

Explore the weather in South London in other months

South London annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	7° / 3°	7	20	4	67 mm	Awful	South London in January
February	8° / 3°	8	16	5	64 mm	Awful	South London in February
March	11° / 4°	5	24	2	52 mm	Bad	South London in March
April	14° / 6°	4	25	1	43 mm	Good	South London in April
May	17° / 9°	5	27	0	59 mm	Good	South London in May
June	20° / 12°	4	26	0	76 mm	Good	South London in June
July	22° / 14°	5	26	0	65 mm	Good	South London in July
August	22° / 14°	5	26	0	72 mm	Good	South London in August
September	20° / 12°	3	27	0	44 mm	Good	South London in September
October	15° / 10°	6	25	0	73 mm	Good	South London in October
November	11° / 6°	6	23	0	65 mm	Ok	South London in November
December	8° / 4°	7	21	3	76 mm	Awful	South London in December

Temperatures in South London in September

Rain in South London in September

Weather in South London in September - FAQ

What is the average temperature in South London in September?

The average temperature in South London in September is 12/20° C.

What is the chance of rain in South London in September?

On average, there are 3 rainy days in South London during September.

Weather wise, is September a good time to visit South London?

The weather in South London in September is good.

Can it snow in South London in September?

On average, there are 0 snowy days in South London in September.

More about the weather in South London