London Weather

London weather varies by season. The warm gulf stream waters keep the island warm in the winter and cool in the summer. A month by month table of average temperature and rainfall appears below.

Temperatures are measured in Celsius. A conversion table is given below. A rough conversion method for Celsius to Fahrenheit can be calculated using Renk's rule: double the Celsius temperature and subtract 10% and then add 32.

Example: 17 C = 34 - 3.4 + 32 = 62.6 F

Celsius to Fahrenheit Conversion Chart

°C	°F	°C	°F	°C	°F	°C	°F
50	122.0	27	80.6	4	39.2	-19	-2.2
49	120.2	26	78.8	3	37.4	-20	-4.0
48	118.4	25	77.0	2	35.6	-21	-5.8
47	116.6	24	75.2	1	33.8	-22	-7.6
46	114.8	23	73.4	0	32.0	-23	-9.4
45	113.0	22	71.6	-1	30.2	-24	-11.2
44	111.2	21	69.8	-2	28.4	-25	-13.0
43	109.4	20	68.0	-3	26.6	-26	-14.8
42	107.6	19	66.2	-4	24.8	-27	-16.6
41	105.8	18	64.4	-5	23.0	-28	-18.4
40	104.0	17	62.6	-6	21.2	-29	-20.2
39	102.2	16	60.8	-7	19.4	-30	-22.0
38	100.4	15	59.0	-8	17.6	-31	-23.8
37	98.6	14	57.2	-9	15.8	-32	-25.6
36	96.8	13	55.4	-10	14.0	-33	-27.4
35	95.0	12	53.6	-11	12.2	-34	-29.2
34	93.2	11	51.8	-12	10.4	-35	-31.0
33	91.4	10	50.0	-13	8.6	-36	-32.8
32	89.6	9	48.2	-14	6.8	-37	-34.6
31	87.8	8	46.4	-15	5.0	-38	-36.4
30	86.0	7	44.6	-16	3.2	-39	-38.2
29	84.2	6	42.8	-17	1.4	-40	-40.0
28	82.4	5	41.0	-18	-0.4

For greater accuracy use formula below:

To convert from Celsius to Fahrenheit:
°F =(9/5)°C+32

To convert from Fahrenheit to Celsius:
°C=(5/9) x (°F-32)

°C = temperature in degrees Celsius
°F = temperature in degrees Fahrenheit

Fall

Month	Temp F	Temp C	Rainy Days	Rain fall
Sept.	59	15.0	7.9	1.9
Oct.	52	11.1	8.3	2.2
Nov.	46	7.8	9.3	2.5

Winter

Month	Temp F	Temp C	Rainy Days	Rain fall
Dec.	42	5.6	9.4	1.9
Jan.	40	4.4	10.7	2.1
Feb.	40	4.4	7.2	1.6

Spring

Month	Temp F	Temp C	Rainy Days	Rain fall
Mar.	44	6.7	9.4	1.5
Apr.	49	9.4	9.3	1.5
May	55	12.8	8.8	1.8

Summer

Month	Temp F	Temp C	Rainy Days	Rain fall
Jun.	61	16.1	7.4	1.8
Jul.	64	17.8	6.9	2.2
Aug.	64	17.8	7.7	2.3

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