Annual mean 12°C · wettest around January · prevailing wind W
Warmest
20.7 °C
Coldest
8.2 °C
Wettest
28%
Windiest
6.9 m/s
Prevailing
W
5.6 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 Lannion over the whole year is 12°C. August is the hottest month, with highs of about 20°C; January is the coldest, with lows of about 7°C. The rainy (wet) season in Lannion runs from October to March, peaking in January with a 23% chance of rain on a given day. The dry season is April to September; July is the driest month, at 8%. Winds in Lannion are highest in February, averaging 5.8 m/s (21 km/h), and lightest in June, at 4.0 m/s (14 km/h). The prevailing wind is from the W. The clearest skies in Lannion come in May, when the sky is typically 73% covered; December is the cloudiest month, at 85%.
Month by month Lannion 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
9°C
7°C
4°C
23%
85%
5.4 m/s
0
0
24
February
10°C
7°C
4°C
19%
81%
5.8 m/s
1
0
34
March
11°C
7°C
6°C
17%
80%
5.5 m/s
2
0
45
April
13°C
8°C
9°C
10%
73%
4.5 m/s
11
0
65
May
16°C
11°C
12°C
10%
73%
4.4 m/s
30
0
83
June
18°C
14°C
16°C
11%
78%
4.0 m/s
59
4
83
July
20°C
15°C
18°C
8%
75%
4.1 m/s
80
6
82
August
20°C
16°C
18°C
9%
75%
4.1 m/s
82
7
80
September
19°C
14°C
16°C
11%
78%
4.2 m/s
65
4
82
October
16°C
12°C
12°C
17%
77%
4.5 m/s
31
1
80
November
12°C
10°C
8°C
23%
83%
5.2 m/s
4
0
57
December
10°C
8°C
5°C
23%
85%
5.6 m/s
0
0
38
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 Lannion weather by season
Year round, Lannion has days of about 9°C at their warmest in January, its coolest month, and 20°C in August, its warmest; the coolest hours of the day run from 7°C to 16°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around January 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.
Lannion weather in winterDecember to February
High 10°CLow 7°CRain 22%
Winter in Lannion has typical daily highs of about 10°C and lows of about 7°C, with a 22% chance of rain on a given day.
Lannion weather in springMarch to May
High 13°CLow 9°CRain 12%
Spring in Lannion has typical daily highs of about 13°C and lows of about 9°C, with a 12% chance of rain on a given day.
Lannion weather in summerJune to August
High 19°CLow 15°CRain 9%
Summer in Lannion has typical daily highs of about 19°C and lows of about 15°C, with a 9% chance of rain on a given day.
Lannion weather in autumnSeptember to November
High 16°CLow 12°CRain 17%
Autumn in Lannion has typical daily highs of about 16°C and lows of about 12°C, with a 17% chance of rain on a given day.
When is the rainy season in Lannion?
The rainy (wet) season in Lannion runs from October to March, peaking in January with a 23% chance of rain on a given day. The dry season is April to September; July is the driest month, at 8%.
What time of year is Lannion windiest?
Winds in Lannion are highest in February, averaging 5.8 m/s (21 km/h), and lightest in June, at 4.0 m/s (14 km/h). The prevailing wind is from the W.
What is the average temperature in Lannion year round?
The average temperature in Lannion over the whole year is 12°C. August is the hottest month, with highs of about 20°C; January is the coldest, with lows of about 7°C.