Climate and monthly weather forecastArlington, WA
Climate and monthly weather forecast
Weather in January
January in Arlington, Washington, is a chilly winter month, with an average temperature varying between 43.3°F (6.3°C) and 34.7°F (1.5°C). Arlington's average high-temperature in January is a chilly 43.3°F (6.3°C), indicating a subtle variation from December. Weather in January »Weather in February
February, the last month of the winter in Arlington, is also a frosty month, with an average temperature fluctuating between 33.8°F (1°C) and 44.2°F (6.8°C). The commencement of February notes an average high-temperature of a still chilly 44.2°F (6.8°C), exhibiting little difference from the previous month. Weather in February »Weather in March
The first month of the spring, March, is still a chilly month in Arlington, Washington, with an average temperature varying between 48.4°F (9.1°C) and 36.3°F (2.4°C). Upon the beginning of March, Arlington's high-temperatures register at a still frosty 48.4°F (9.1°C), closely mirroring the preceding month. Weather in March »Weather in April
April is a fresh spring month in Arlington, Washington, with an average temperature fluctuating between 39.4°F (4.1°C) and 53.6°F (12°C). As March transitions into April, Arlington records an average high-temperature of a cool 53.6°F (12°C), showing a gentle shift from the preceding month. Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Arlington, Washington, with an average temperature varying between 61.3°F (16.3°C) and 43.7°F (6.5°C). The onset of May introduces a subtle rise in the average high-temperature, nudging from a cool 53.6°F (12°C) in April to a comfortable 61.3°F (16.3°C). Weather in May »Weather in June
June, the first month of the summer in Arlington, is still a comfortable month, with an average temperature ranging between max 66°F (18.9°C) and min 47.1°F (8.4°C). In June, Arlington experiences a minor shift in meteorological conditions with average high-temperatures marked at a still refreshing 66°F (18.9°C), closely mirroring the climate in May. Weather in June »Weather in July
July is an agreeable summer month in Arlington, Washington, with temperature in the range of an average high of 72°F (22.2°C) and an average low of 50.5°F (10.3°C). July's arrival brings a slight change in high-temperatures, adjusting from a refreshing 66°F (18.9°C) in June to an agreeable 72°F (22.2°C). Weather in July »Weather in August
August, the last month of the summer in Arlington, is another pleasant month, with an average temperature ranging between max 72.3°F (22.4°C) and min 51.6°F (10.9°C). Temperature readings reach their annual highs in August, averaging 72.3°F (22.4°C) and a minimum average of 51.6°F (10.9°C). Weather in August »Weather in September
The first month of the autumn, September, is still a refreshing month in Arlington, Washington, with an average temperature ranging between min 49.1°F (9.5°C) and max 66.2°F (19°C). The shift from August to September coincides with a small decrease in the average high-temperature, down to a comfortable 66.2°F (19°C) from a pleasant 72.3°F (22.4°C). Weather in September »Weather in October
October, the same as September, in Arlington, Washington, is another mild autumn month, with temperature in the range of an average high of 56.3°F (13.5°C) and an average low of 43.3°F (6.3°C). Arlington's October weather features a mild decline in high-temperatures, reducing from an enjoyable 66.2°F (19°C) in September to a moderate 56.3°F (13.5°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Arlington, Washington, with an average temperature fluctuating between 38.5°F (3.6°C) and 46.9°F (8.3°C). November brings a decrease in the average high-temperature, shifting from a refreshing 56.3°F (13.5°C) in October to a frosty 46.9°F (8.3°C). Weather in November »Weather in December
December, the first month of the winter in Arlington, is also a wintry month, with temperature in the range of an average high of 41.7°F (5.4°C) and an average low of 34°F (1.1°C). Arlington, Washington, notes the coldest temperatures in December, with a high average of 41.7°F (5.4°C) and a low of 34°F (1.1°C). Weather in December »Updated: Jul 6, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, February, November and December, with an average relative humidity of 85%, are most humid months.
In Arlington, during the entire year, the rain falls for 188.6 days and collects up to 34.92" (887mm) of precipitation.
Months with snowfall are January through April, November and December.
In Arlington, during the entire year, snow falls for 11.6 days and aggregates up to 9.61" (244mm) of snow.
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.
February is the month with the most snowfall. Snow falls for 4.3 days and accumulates 4.45" (113mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
May through October are months without snowfall.
June has the longest days of the year in Arlington, with an average of 16h and 0min of daylight.
With an average relative humidity of 73%, July is the least humid month.
The month with the least rainfall is July, when the rain falls for 8 days and typically collects 0.51" (13mm) of precipitation.
July is the month with the highest UV index in Arlington, Washington, with an average maximum UV index of 5.
August is the month that records the highest temperatures, with averages ranging from a high of 72.3°F (22.4°C) to a low of 51.6°F (10.9°C).
With an average of 10.7h of sunshine, August has the most sunshine of the year.
The month with the most rainfall is November, when the rain falls for 20.2 days and typically aggregates up to 4.92" (125mm) of precipitation.
December, noted for its average high-temperature of 41.7°F (5.4°C) and an average low-temperature of 34°F (1.1°C), is considered the coldest month.
The month with the shortest days is December, with an average of 8h and 24min of daylight.
The month with the least sunshine is December, with an average of 4.1h of sunshine.
Average temperature
Arlington, WA
The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is December (41.7°F).
The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is February (33.8°F).
Average pressure
Arlington, 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:
30.01"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30"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:
30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed
Arlington, WA
- Average wind speed in January:
5.6mph - Average wind speed in February:
5mph - Average wind speed in March:
5.5mph - Average wind speed in April:
4.7mph - Average wind speed in May:
3.9mph - Average wind speed in June:
3.7mph
- Average wind speed in July:
3.4mph - Average wind speed in August:
3.3mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.7mph - Average wind speed in November:
5.6mph - Average wind speed in December:
5.3mph
The windiest months (with the highest average wind speed) are January and November (5.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity
Arlington, WA
The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is July (73%).
Average rainfall
Arlington, WA
- Average rainfall in January:
4.69" - Average rainfall in February:
3.66" - Average rainfall in March:
3.78" - Average rainfall in April:
2.95" - Average rainfall in May:
2.05" - Average rainfall in June:
1.38"
- Average rainfall in July:
0.51" - Average rainfall in August:
0.59" - Average rainfall in September:
2.05" - Average rainfall in October:
3.82" - Average rainfall in November:
4.92" - Average rainfall in December:
4.53"
The wettest month (with the highest rainfall) is November (4.92").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days
Arlington, WA
- Average rainfall days in January:
18.1 days - Average rainfall days in February:
16.9 days - Average rainfall days in March:
20.9 days - Average rainfall days in April:
19 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
14.1 days
- Average rainfall days in July:
8 days - Average rainfall days in August:
6.9 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
17.3 days - Average rainfall days in November:
20.2 days - Average rainfall days in December:
19.4 days
The month with the highest number of rainy days is March (20.9 days).
The month with the least rainy days is August (6.9 days).
Average snowfall
Arlington, WA
The month with the highest snowfall is February (4.45").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Arlington, WA
- Average snowfall days in January:
2.3 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
2.1 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:
0.7 days - Average snowfall days in December:
2 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Arlington, WA
- Average daylight in January:
8h and 54min - Average daylight in February:
10h and 18min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 12min - Average daylight in June:
16h and 0min
- Average daylight in July:
15h and 36min - Average daylight in August:
14h and 18min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 12min - Average daylight in December:
8h and 24min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
4h and 12min - Average sunshine in February:
4h and 24min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 54min - Average sunshine in May:
9h and 6min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 42min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 24min - Average sunshine in November:
4h and 30min - Average sunshine in December:
4h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days
Arlington, WA
- Average sunshine days in January:
10.4 days - Average sunshine days in February:
8.3 days - Average sunshine days in March:
8.1 days - Average sunshine days in April:
8.4 days - Average sunshine days in May:
14.1 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
20.6 days - Average sunshine days in August:
22 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
12.4 days - Average sunshine days in November:
9 days - Average sunshine days in December:
9.5 days
The month with the most sunshine days is August (22 days).
The month with the least sunshine days is March (8.1 days).
Average UV index
Arlington, WA
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
Arlington, WA
The month with the most cloud cover is December (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility
Arlington, WA
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).
