Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January is a frosty winter month in Mount Vernon, Washington, with an average temperature varying between 37°F (2.8°C) and 44.2°F (6.8°C). In January, the average high-temperature is essentially the same as in December - a frosty 44.2°F (6.8°C). Weather in January »
Weather in February
The last month of the winter, February, is also a frosty month in Mount Vernon, Washington, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 44.6°F (7°C). In Mount Vernon, the average high-temperature in February is almost the same as in January - a still frosty 44.6°F (7°C). Weather in February »
Weather in March
March, the first month of the spring in Mount Vernon, is still a chilly month, with temperature in the range of an average low of 38.8°F (3.8°C) and an average high of 48.2°F (9°C). In March, the average high-temperature is relatively the same as in February - a still chilly 48.2°F (9°C). Weather in March »
Weather in April
April is a cool spring month in Mount Vernon, Washington, with an average temperature fluctuating between 41.9°F (5.5°C) and 53.1°F (11.7°C). In Mount Vernon, the average high-temperature in April is almost the same as in March - a fresh 53.1°F (11.7°C). Weather in April »
Weather in May
May, the last month of the spring in Mount Vernon, is a moderate month, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 60.3°F (15.7°C). In Mount Vernon, the average high-temperature in May marginally rises from a fresh 53.1°F (11.7°C) in April to a mild 60.3°F (15.7°C). Weather in May »
Weather in June
June, the first month of the summer in Mount Vernon, is a comfortable month, with an average temperature varying between 63.9°F (17.7°C) and 49.3°F (9.6°C). In June, the average high-temperature is almost the same as in May - a comfortable 63.9°F (17.7°C). Weather in June »
Weather in July
July in Mount Vernon, Washington, is a pleasant summer month, with an average temperature ranging between max 68.4°F (20.2°C) and min 52.7°F (11.5°C). The warmest months are July and August, with an average high-temperature of 68.4°F (20.2°C). Weather in July »
Weather in August
August, the last month of the summer in Mount Vernon, is also an agreeable month, with an average temperature fluctuating between 54.1°F (12.3°C) and 68.4°F (20.2°C). July and August, with an average high-temperature of 68.4°F (20.2°C), are the warmest months. Weather in August »
Weather in September
September, the first month of the autumn in Mount Vernon, is also an enjoyable month, with an average temperature fluctuating between 51.4°F (10.8°C) and 64°F (17.8°C). In Mount Vernon, the average high-temperature in September is almost the same as in August - a comfortable 64°F (17.8°C). Weather in September »
Weather in October
October, the same as September, in Mount Vernon, Washington, is another mild autumn month, with an average temperature varying between 55.8°F (13.2°C) and 46.2°F (7.9°C). In Mount Vernon, Washington, the average high-temperature in October slightly decreases from a comfortable 64°F (17.8°C) in September to a moderate 55.8°F (13.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Mount Vernon, is also a frosty month, with an average temperature varying between 41.2°F (5.1°C) and 47.8°F (8.8°C). In November, the average high-temperature slightly decreases from a moderate 55.8°F (13.2°C) in October to a frosty 47.8°F (8.8°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Mount Vernon, Washington, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 42.6°F (5.9°C). The coldest month is December, with an average high-temperature of 42.6°F (5.9°C) and an average low-temperature of 36.3°F (2.4°C). Weather in December »
[Resources]FAQ
What is the most humid month in Mount Vernon?
January and February, with an average relative humidity of 83%, are most humid months.
How many days does it rain in Mount Vernon?
In Mount Vernon, during the entire year, the rain falls for 185.2 days and collects up to 34.72" (882mm) of precipitation.
When does it snow in Mount Vernon?
January through April, November and December are months with snowfall.
How much does it snow in Mount Vernon?
In Mount Vernon, Washington, during the entire year, snow falls for 9.9 days and aggregates up to 7.91" (201mm) of snow.
What is the month with the lowest UV index in Mount Vernon?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the snowiest month in Mount Vernon?
The month with the most snowfall in Mount Vernon is February, when snow falls for 3.6 days and typically aggregates up to 3.54" (90mm) of snow.
When is Daylight Saving Time (DST) in Mount Vernon?
On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from PDT to PST.
When it does not snow in Mount Vernon?
May through October are months without snowfall in Mount Vernon, Washington.
When are the longest days in Mount Vernon?
With an average of 16h and 2min of daylight, June has the longest days of the year in Mount Vernon, Washington.
What is the warmest month in Mount Vernon?
July and August, with an average high-temperature of 68.4°F (20.2°C), are warmest months.
What is the least humid month in Mount Vernon?
July is the least humid month in Mount Vernon, Washington, with an average relative humidity of 75%.
What is the driest month in Mount Vernon?
The month with the least rainfall in Mount Vernon is July, when the rain falls for 7.9 days and typically collects 0.63" (16mm) of precipitation.
What are the months with the most sunshine in Mount Vernon?
July and August, with an average of 10.4h of sunshine, are months with the most sunshine in Mount Vernon, Washington.
When is the highest UV index in Mount Vernon?
July is the month with the highest UV index in Mount Vernon, with an average maximum UV index of 5.
What is the rainiest month in Mount Vernon?
The month with the most rainfall in Mount Vernon, Washington, is November, when the rain falls for 20.7 days and typically aggregates up to 4.96" (126mm) of precipitation.
What is the coldest month in Mount Vernon?
With an average high-temperature of 42.6°F (5.9°C) and an average low-temperature of 36.3°F (2.4°C), December is the coldest month in Mount Vernon.
What is the month with the shortest days in Mount Vernon?
The month with the shortest days in Mount Vernon is December, with an average of 8h and 23min of daylight.
What is the month with the least sunshine in Mount Vernon?
December has the least sunshine of the year in Mount Vernon, with an average of 3.9h of sunshine.
Average temperature
Mount Vernon, WA
The warmest months (with the highest average high temperature) are July and August (68.4°F).
The month with the lowest average high temperature is December (42.6°F).
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is February (36.1°F).
Average pressure
Mount Vernon, WA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.04"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
30.02"Hg
- Average pressure in July:
30.04"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed
Mount Vernon, WA
- Average wind speed in January:
7mph - Average wind speed in February:
6.6mph - Average wind speed in March:
6.8mph - Average wind speed in April:
6mph - Average wind speed in May:
4.6mph - Average wind speed in June:
4.4mph
- Average wind speed in July:
3.9mph - Average wind speed in August:
3.7mph - Average wind speed in September:
4.5mph - Average wind speed in October:
6mph - Average wind speed in November:
7.5mph - Average wind speed in December:
7.2mph
The windiest month (with the highest average wind speed) is November (7.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity
Mount Vernon, WA
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is July (75%).
Average rainfall
Mount Vernon, WA
- Average rainfall in January:
4.13" - Average rainfall in February:
3.62" - Average rainfall in March:
3.74" - Average rainfall in April:
2.91" - Average rainfall in May:
2.2" - Average rainfall in June:
1.54"
- Average rainfall in July:
0.63" - Average rainfall in August:
0.98" - Average rainfall in September:
2.24" - Average rainfall in October:
3.7" - Average rainfall in November:
4.96" - Average rainfall in December:
4.06"
The wettest month (with the highest rainfall) is November (4.96").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days
Mount Vernon, WA
- Average rainfall days in January:
18.3 days - Average rainfall days in February:
16.3 days - Average rainfall days in March:
20.8 days - Average rainfall days in April:
19.2 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
12.4 days
- Average rainfall days in July:
7.9 days - Average rainfall days in August:
7.2 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
17 days - Average rainfall days in November:
20.7 days - Average rainfall days in December:
19.5 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (7.2 days).
Average snowfall
Mount Vernon, WA
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Mount Vernon, WA
- Average snowfall days in January:
2.2 days - Average snowfall days in February:
3.6 days - Average snowfall days in March:
1.9 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
1.5 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Mount Vernon, WA
- Average daylight in January:
8h and 52min - Average daylight in February:
10h and 14min - Average daylight in March:
11h and 57min - Average daylight in April:
13h and 43min - Average daylight in May:
15h and 15min - Average daylight in June:
16h and 2min
- Average daylight in July:
15h and 38min - Average daylight in August:
14h and 16min - Average daylight in September:
12h and 34min - Average daylight in October:
10h and 47min - Average daylight in November:
9h and 13min - Average daylight in December:
8h and 23min
The month with the longest days is June (Average daylight: 16h and 2min).
The month with the shortest days is December (Average daylight: 8h and 23min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 6min - Average sunshine in March:
5h and 42min - Average sunshine in April:
7h and 42min - Average sunshine in May:
9h and 0min - Average sunshine in June:
9h and 12min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 24min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 24min - Average sunshine in November:
4h and 18min - Average sunshine in December:
3h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days
Mount Vernon, WA
- Average sunshine days in January:
11 days - Average sunshine days in February:
9.2 days - Average sunshine days in March:
8.6 days - Average sunshine days in April:
8.9 days - Average sunshine days in May:
15.1 days - Average sunshine days in June:
15 days
- Average sunshine days in July:
21.6 days - Average sunshine days in August:
22.3 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
12.6 days - Average sunshine days in November:
8.1 days - Average sunshine days in December:
9.9 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is November (8.1 days).
Average UV index
Mount Vernon, WA
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Mount Vernon, WA
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility
Mount Vernon, WA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
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