Annual mean 12°C · wettest around November · prevailing wind SW
Warmest
19.2 °C
Coldest
8.1 °C
Wettest
44%
Windiest
7.8 m/s
Prevailing
SW
6.4 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 Helston over the whole year is 12°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about 7°C. Helston has no sharply defined rainy season: the chance of rain on a given day runs from 18% in May, the driest month, to 35% in November, the wettest. Winds in Helston are highest in February, averaging 6.7 m/s (24 km/h), and lightest in July, at 4.7 m/s (17 km/h). The prevailing wind is from the SW. The clearest skies in Helston come in May, when the sky is typically 55% covered; December is the cloudiest month, at 73%.
Month by month Helston 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
8°C
7°C
3°C
32%
69%
6.0 m/s
0
0
17
February
9°C
7°C
3°C
31%
67%
6.7 m/s
0
0
21
March
10°C
7°C
4°C
31%
65%
6.2 m/s
0
0
27
April
12°C
8°C
6°C
21%
56%
5.6 m/s
3
0
45
May
14°C
11°C
10°C
18%
55%
5.0 m/s
15
0
71
June
17°C
13°C
13°C
21%
60%
4.9 m/s
38
1
80
July
19°C
15°C
16°C
20%
60%
4.7 m/s
60
3
82
August
18°C
15°C
16°C
19%
61%
4.8 m/s
60
2
82
September
17°C
13°C
14°C
25%
61%
5.1 m/s
39
1
78
October
14°C
12°C
10°C
30%
65%
5.6 m/s
11
0
69
November
11°C
9°C
6°C
35%
69%
6.1 m/s
1
0
41
December
9°C
8°C
4°C
35%
73%
6.5 m/s
0
0
27
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 Helston weather by season
Year round, Helston has days of about 8°C at their warmest in January, its coolest month, and 19°C in July, its warmest; the coolest hours of the day run from 7°C to 15°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around November and least likely around May. 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.
Helston weather in winterDecember to February
High 9°CLow 7°CRain 33%
Winter in Helston has typical daily highs of about 9°C and lows of about 7°C, with a 33% chance of rain on a given day.
Helston weather in springMarch to May
High 12°CLow 8°CRain 23%
Spring in Helston has typical daily highs of about 12°C and lows of about 8°C, with a 23% chance of rain on a given day.
Helston weather in summerJune to August
High 18°CLow 14°CRain 20%
Summer in Helston has typical daily highs of about 18°C and lows of about 14°C, with a 20% chance of rain on a given day.
Helston weather in autumnSeptember to November
High 14°CLow 11°CRain 30%
Autumn in Helston has typical daily highs of about 14°C and lows of about 11°C, with a 30% chance of rain on a given day.
When is the rainy season in Helston?
Helston has no sharply defined rainy season: the chance of rain on a given day runs from 18% in May, the driest month, to 35% in November, the wettest.
What time of year is Helston windiest?
Winds in Helston are highest in February, averaging 6.7 m/s (24 km/h), and lightest in July, at 4.7 m/s (17 km/h). The prevailing wind is from the SW.
What is the average temperature in Helston year round?
The average temperature in Helston over the whole year is 12°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about 7°C.