Annual mean 11°C · wettest around December · prevailing wind SW
Warmest
21.6 °C
Coldest
6.1 °C
Wettest
24%
Windiest
5.5 m/s
Prevailing
SW
4.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Lewes over the whole year is 11°C. July is the hottest month, with highs of about 21°C; January is the coldest, with lows of about 4°C. Lewes has no sharply defined rainy season: the chance of rain on a given day runs from 12% in July, the driest month, to 23% in December, the wettest. Winds in Lewes are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 3.3 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in Lewes come in August, when the sky is typically 52% covered; December is the cloudiest month, at 71%.
Month by month Lewes climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
7°C
4°C
2°C
20%
68%
3.9 m/s
0
0
15
February
8°C
5°C
3°C
19%
66%
4.3 m/s
0
0
25
March
10°C
5°C
5°C
18%
63%
4.0 m/s
2
0
39
April
13°C
6°C
9°C
12%
54%
3.6 m/s
11
0
61
May
16°C
10°C
13°C
13%
53%
3.5 m/s
37
1
81
June
19°C
14°C
17°C
12%
53%
3.5 m/s
65
8
79
July
21°C
16°C
19°C
12%
53%
3.5 m/s
78
13
73
August
21°C
15°C
19°C
12%
52%
3.4 m/s
78
11
75
September
19°C
13°C
16°C
15%
55%
3.3 m/s
62
6
80
October
15°C
11°C
12°C
20%
60%
3.5 m/s
25
0
81
November
10°C
7°C
6°C
20%
65%
3.7 m/s
2
0
49
December
8°C
6°C
4°C
23%
71%
4.0 m/s
0
0
28
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Lewes weather by season
Year round, Lewes has days of about 7°C at their warmest in January, its coolest month, and 21°C in July, its warmest; the coolest hours of the day run from 4°C to 16°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Lewes weather in winterDecember to February
High 8°CLow 5°CRain 21%
Winter in Lewes has typical daily highs of about 8°C and lows of about 5°C, with a 21% chance of rain on a given day.
Lewes weather in springMarch to May
High 13°CLow 7°CRain 14%
Spring in Lewes has typical daily highs of about 13°C and lows of about 7°C, with a 14% chance of rain on a given day.
Lewes weather in summerJune to August
High 20°CLow 15°CRain 12%
Summer in Lewes has typical daily highs of about 20°C and lows of about 15°C, with a 12% chance of rain on a given day.
Lewes weather in autumnSeptember to November
High 15°CLow 10°CRain 18%
Autumn in Lewes has typical daily highs of about 15°C and lows of about 10°C, with a 18% chance of rain on a given day.
When is the rainy season in Lewes?
Lewes has no sharply defined rainy season: the chance of rain on a given day runs from 12% in July, the driest month, to 23% in December, the wettest.
What time of year is Lewes windiest?
Winds in Lewes are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 3.3 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in Lewes year round?
The average temperature in Lewes over the whole year is 11°C. July is the hottest month, with highs of about 21°C; January is the coldest, with lows of about 4°C.