Climate averages 1991–2020

Purley weather
in July.

A mild, moderately wet month: the warmest and the joint 7th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 21.1°C Daytime mean, July

Average low 13.1°C Night-time mean, July

Rainfall 61 mm 11 days with ≥1 mm

Daylight 16 h Sunrise to sunset, per day

July is a mild month in Purley: daytime highs average 21.1°C and nights cool to about 13.1°C. By daytime temperature it is the warmest month of the year.

Expect about 61 mm of rain on roughly 11 days, which makes July a moderately wet month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 06 min on an average July day.

The nearest other city in this atlas is Croydon (5 km away). In July its highs average 21.3°C, about as warm as Purley, with 56 mm of rain.

Among the 143 cities listed in the United Kingdom, Purley ranks joint 30th of 143 for the warmest July highs and joint 61st of 143 for the driest July (rainfall, lowest first). The mean July high of those 143 cities is 20.0°C; Purley is 1.2°C warmer than that mean.

From July to August, average highs fall by 0.3°C to 20.8°C, and monthly rainfall rises from 61 mm to 70 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Purley climate table

1991–2020

Monthly climate averages for Purley, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	7.1°C2.1°C	2.1°C	60	11.4	8.48 h
February	7.6°C1.9°C	1.9°C	50	9.5	9.910 h
March	10.0°C3.1°C	3.1°C	45	10.3	11.812 h
April	13.0°C4.8°C	4.8°C	53	11.3	13.814 h
May	16.1°C7.9°C	7.9°C	57	10.3	15.616 h
June	19.0°C10.9°C	10.9°C	61	10.4	16.517 h
July, selected	21.1°C13.1°C	13.1°C	61	11.1	16.116 h
August	20.8°C13.1°C	13.1°C	70	10.4	14.615 h
September	18.1°C10.9°C	10.9°C	51	9.2	12.713 h
October	14.2°C8.2°C	8.2°C	63	10.7	10.711 h
November	10.1°C4.8°C	4.8°C	66	11.6	9.09 h
December	7.4°C2.6°C	2.6°C	65	11.4	8.08 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Purley

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Purley) is explained once on the Purley year overview and on the Sources, method and limits page.