Weather and climate in Croydon, England, United Kingdom: monthly averages and best time for stargazing

Best for stargazingDec, Jan, NovMost clear, dark hours

Warmest monthJulyAverage high 23°C

Coolest monthFebruaryAverage low 1°C

Wettest monthOctober74 mm on average

What the weather is like in Croydon

The warmest month in Croydon is July, with average highs of 23°C. The coolest is February, when nights average 1°C. About 709 mm of rain and snow falls in a typical year, most in October and least in April.

Skies are clearest in September (65% average cloud cover) and cloudiest in January (76%). Combining cloud with the length of truly dark nights, December, January, November offer the most clear, dark hours for stargazing.

Clear, dark hours per night

2.8 Jan

2.5 Feb

2.2 Mar

2.0 Apr

0.7 May

0.0 Jun

0.0 Jul

1.5 Aug

2.6 Sep

2.6 Oct

2.7 Nov

2.9 Dec

Hours of full astronomical darkness in mid-month, multiplied by the average share of clear sky. A rough guide to how much good observing time a typical night offers.

Monthly averages

Month	High	Low	Precipitation	Cloud cover	Humidity	Wind	Dark hours
January	7°C	1°C	65 mm	76%	93%	14 km/h	11.6 h
February	7°C	1°C	54 mm	75%	90%	14 km/h	10.2 h
March	10°C	2°C	50 mm	73%	86%	13 km/h	8.4 h
April	14°C	4°C	42 mm	66%	81%	11 km/h	5.8 h
May	17°C	7°C	55 mm	68%	79%	11 km/h	2.3 h
June	20°C	11°C	56 mm	69%	78%	11 km/h	0.0 h
July	23°C	13°C	60 mm	66%	76%	11 km/h	0.0 h
August	22°C	12°C	66 mm	67%	78%	11 km/h	4.7 h
September	19°C	10°C	44 mm	65%	81%	11 km/h	7.5 h
October	15°C	7°C	74 mm	73%	87%	12 km/h	9.6 h
November	10°C	4°C	74 mm	76%	92%	12 km/h	11.2 h
December	7°C	2°C	71 mm	76%	94%	13 km/h	12.0 h

Climate averages: NASA POWER, 2001–2025, for the grid area around 51.50, 0.00 (about 50 km across). High and low temperatures are estimated from the monthly mean and the average daily range. Hills, coasts and cities can differ from the area average. Aurora outlook for Croydon · Sources and methods.