Annual mean 12°C · wettest around December · prevailing wind SW
Warmest
27.8 °C
Coldest
-0.5 °C
Wettest
47%
Windiest
5.1 m/s
Prevailing
SW
4.0 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 12°C. July is the hottest month, with highs of about 27°C; January 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 42% in August, the driest month, to 46% in December, the wettest. Winds in Mount Vernon are highest in March, averaging 3.7 m/s (13 km/h), and lightest in August, at 1.9 m/s (7 km/h). The prevailing wind is from the SW. The clearest skies in Mount Vernon come in July, when the sky is typically 33% covered; January is the cloudiest month, at 67%.
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
0°C
-3°C
-5°C
45%
67%
3.5 m/s
1
0
6
February
4°C
-1°C
-2°C
45%
56%
3.5 m/s
2
0
14
March
9°C
2°C
4°C
45%
50%
3.7 m/s
9
0
32
April
14°C
7°C
10°C
45%
47%
3.5 m/s
31
2
55
May
21°C
13°C
18°C
45%
45%
2.8 m/s
59
20
57
June
25°C
18°C
25°C
43%
35%
2.6 m/s
61
44
34
July
27°C
20°C
28°C
43%
33%
2.0 m/s
39
66
11
August
27°C
18°C
27°C
42%
35%
1.9 m/s
48
58
19
September
24°C
15°C
23°C
43%
35%
2.0 m/s
63
40
43
October
18°C
9°C
15°C
46%
43%
2.6 m/s
44
10
63
November
9°C
3°C
4°C
46%
48%
3.1 m/s
10
0
35
December
3°C
-0°C
-2°C
46%
61%
3.3 m/s
0
0
13
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 0°C at their warmest in January, its coolest month, and 27°C in July, its warmest; the coolest hours of the day run from -3°C to 20°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around December and least likely around August. 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 2°CLow -2°CRain 45%
Winter in Mount Vernon has typical daily highs of about 2°C and lows of about -2°C, with a 45% chance of rain on a given day.
Mount Vernon weather in springMarch to May
High 15°CLow 8°CRain 45%
Spring in Mount Vernon has typical daily highs of about 15°C and lows of about 8°C, with a 45% chance of rain on a given day.
Mount Vernon weather in summerJune to August
High 26°CLow 19°CRain 42%
Summer in Mount Vernon has typical daily highs of about 26°C and lows of about 19°C, with a 42% chance of rain on a given day.
Mount Vernon weather in autumnSeptember to November
High 17°CLow 9°CRain 45%
Autumn in Mount Vernon has typical daily highs of about 17°C and lows of about 9°C, with a 45% 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 42% in August, the driest month, to 46% in December, the wettest.
What time of year is Mount Vernon windiest?
Winds in Mount Vernon are highest in March, averaging 3.7 m/s (13 km/h), and lightest in August, at 1.9 m/s (7 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 12°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -3°C.