Annual mean 10°C · wettest around November · prevailing wind SW
Warmest
21.5 °C
Coldest
5.5 °C
Wettest
38%
Windiest
4.5 m/s
Prevailing
SW
3.5 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 Mount Vernon over the whole year is 10°C. August is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 3°C. Mount Vernon has no sharply defined rainy season: the chance of rain on a given day runs from 24% in July, the driest month, to 38% in November, the wettest. Winds in Mount Vernon are highest in January, averaging 3.1 m/s (11 km/h), and lightest in August, at 2.2 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in Mount Vernon come in July, when the sky is typically 35% covered; December is the cloudiest month, at 74%.
Month by month Mount Vernon 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
3°C
36%
70%
3.1 m/s
0
0
20
February
6°C
3°C
2°C
36%
73%
3.0 m/s
0
0
19
March
9°C
5°C
5°C
34%
65%
3.1 m/s
1
0
36
April
12°C
7°C
8°C
32%
57%
3.1 m/s
7
0
62
May
15°C
10°C
13°C
29%
52%
2.6 m/s
33
1
85
June
18°C
12°C
16°C
28%
51%
2.5 m/s
60
4
86
July
21°C
13°C
19°C
24%
35%
2.4 m/s
87
10
80
August
21°C
14°C
20°C
25%
39%
2.2 m/s
87
14
76
September
18°C
12°C
16°C
28%
53%
2.2 m/s
67
4
85
October
13°C
8°C
10°C
34%
64%
2.5 m/s
17
0
74
November
9°C
6°C
6°C
38%
70%
3.0 m/s
1
0
40
December
6°C
4°C
3°C
37%
74%
2.9 m/s
0
0
20
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 Mount Vernon weather by season
Year round, Mount Vernon has days of about 6°C at their warmest in February, its coolest month, and 21°C in August, its warmest; the coolest hours of the day run from 3°C to 14°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around November 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.
Mount Vernon weather in winterDecember to February
High 6°CLow 4°CRain 36%
Winter in Mount Vernon has typical daily highs of about 6°C and lows of about 4°C, with a 36% chance of rain on a given day.
Mount Vernon weather in springMarch to May
High 12°CLow 7°CRain 32%
Spring in Mount Vernon has typical daily highs of about 12°C and lows of about 7°C, with a 32% chance of rain on a given day.
Mount Vernon weather in summerJune to August
High 20°CLow 13°CRain 26%
Summer in Mount Vernon has typical daily highs of about 20°C and lows of about 13°C, with a 26% chance of rain on a given day.
Mount Vernon weather in autumnSeptember to November
High 13°CLow 9°CRain 33%
Autumn in Mount Vernon has typical daily highs of about 13°C and lows of about 9°C, with a 33% chance of rain on a given day.
When is the rainy season in Mount Vernon?
Mount Vernon has no sharply defined rainy season: the chance of rain on a given day runs from 24% in July, the driest month, to 38% in November, the wettest.
What time of year is Mount Vernon windiest?
Winds in Mount Vernon are highest in January, averaging 3.1 m/s (11 km/h), and lightest in August, at 2.2 m/s (8 km/h). The prevailing wind is from the SW.
What is the average temperature in Mount Vernon year round?
The average temperature in Mount Vernon over the whole year is 10°C. August is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 3°C.