Walla Walla
Washington, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Walla Walla, WA

The small city of Walla Walla in Washington, from the sky, rays of the sun on some of the tall buildings, and a far view of a vast hilly layout
The small city of Walla Walla in Washington, from the sky, rays of the sun on some of the tall buildings, and a far view of a vast hilly layout
January, like December, in Walla Walla, Washington, is a wintry winter month, with average temperature fluctuating between 38.8°F (3.8°C) and 28°F (-2.2°C). In Walla Walla, the average high-temperature is practically the same as in December - a still cold 38.8°F (3.8°C). Weather in January »

February, the last month of the winter, in Walla Walla, is also a wintry month, with average temperature varying between 30.6°F (-0.8°C) and 42.3°F (5.7°C). In Walla Walla, Washington, the average high-temperature in February is practically the same as in January - a still cold 42.3°F (5.7°C). Weather in February »

The first month of the spring, March, is a frosty month in Walla Walla, Washington, with average temperature fluctuating between 35.2°F (1.8°C) and 49.5°F (9.7°C). In Walla Walla, Washington, the average high-temperature slightly increases, from a cold 42.3°F (5.7°C) in February, to a chilly 49.5°F (9.7°C). Weather in March »

April is a mild spring month in Walla Walla, Washington, with average temperature fluctuating between 56.8°F (13.8°C) and 39°F (3.9°C). In Walla Walla, the average high-temperature slightly increases, from a chilly 49.5°F (9.7°C) in March, to a mild 56.8°F (13.8°C). Weather in April »

The last month of the spring, May, is a comfortable month in Walla Walla, Washington, with average temperature fluctuating between 45.5°F (7.5°C) and 66.2°F (19°C). In May, the average high-temperature rises, from a mild 56.8°F (13.8°C) in April, to an enjoyable 66.2°F (19°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Walla Walla, Washington, with temperature in the range of an average high of 73.6°F (23.1°C) and an average low of 51.3°F (10.7°C). In June, the average high-temperature marginally rises, from a comfortable 66.2°F (19°C) in May, to a moderately hot 73.6°F (23.1°C). Weather in June »

July, like June, in Walla Walla, Washington, is a moderately hot summer month, with average temperature fluctuating between 84.7°F (29.3°C) and 59.2°F (15.1°C). The warmest month is July, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 59.2°F (15.1°C). The average heat index is appraised at 84°F (28.9°C). Weather in July »

August, the last month of the summer, in Walla Walla, is another warm month, with temperature in the range of an average high of 84.6°F (29.2°C) and an average low of 60.8°F (16°C). In August, the average high-temperature is essentially the same as in July - a still warm 84.6°F (29.2°C). Weather in August »

September, the first month of the autumn, in Walla Walla, is also a moderately hot month, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 53.6°F (12°C). In September, the average high-temperature drops, from a warm 84.6°F (29.2°C) in August, to a still moderately hot 74.3°F (23.5°C). Weather in September »

October, like September, is another mild autumn month in Walla Walla, Washington, with average temperature ranging between min 44.1°F (6.7°C) and max 59.9°F (15.5°C). In October, the average high-temperature significantly decreases, from a moderately hot 74.3°F (23.5°C) in September, to a moderate 59.9°F (15.5°C). Weather in October »

The last month of the autumn, November, is also a frosty month in Walla Walla, Washington, with temperature in the range of an average high of 46.9°F (8.3°C) and an average low of 34.9°F (1.6°C). In Walla Walla, the average high-temperature drops, from a mild 59.9°F (15.5°C) in October, to a frosty 46.9°F (8.3°C). Weather in November »

December, the first month of the winter, in Walla Walla, is also a wintry month, with average temperature ranging between max 37.4°F (3°C) and min 27°F (-2.8°C). December is the coldest month, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 27°F (-2.8°C). Weather in December »

What is the most humid month in Walla Walla?

The most humid month in Walla Walla is January, with an average relative humidity of 81%.

How many days does it rain in Walla Walla?

Throughout the year, in Walla Walla, there are 141.7 rainfall days, and 15.12" (384mm) of precipitation is accumulated.

When does it snow in Walla Walla?

Months with snowfall in Walla Walla are January through April, September, November and December.

How many days does it snow in Walla Walla?

In Walla Walla, Washington, during the entire year, snow falls for 21.1 days, and aggregates up to 9.09" (231mm) of snow.

What is the month with the least sunshine in Walla Walla?

The month with the least sunshine is January, with an average of 5.3h of sunshine.

What are the months with the lowest UV index in Walla Walla?

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 Walla Walla?

February is the month with the most snowfall in Walla Walla. Snow falls for 6.1 days and accumulates 2.91" (74mm) of snow.

What is the rainiest month in Walla Walla?

The month with the most rainfall is March when the rain falls for 17.4 days and typically aggregates up to 2.01" (51mm) of precipitation.

When it does not snow in Walla Walla?

In Walla Walla snow does not fall in May through August and October.

When are the longest days in Walla Walla?

With an average of 15.7h of daylight, June has the longest days of the year in Walla Walla.

What is the warmest month in Walla Walla?

With an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 59.2°F (15.1°C), July is the warmest month in Walla Walla, Washington.

What is the driest month in Walla Walla?

The month with the least rainfall in Walla Walla, Washington, is July when the rain falls for 4.9 days and typically collects 0.35" (9mm) of precipitation.

What is the month with the highest UV index in Walla Walla?

July is the month with the highest UV index in Walla Walla, with an average maximum UV index of 7.

What is the least humid month in Walla Walla?

The least humid month in Walla Walla, Washington, is August, with an average relative humidity of 39%.

What month has the most sunshine in Walla Walla?

August has the most sunshine of the year in Walla Walla, with an average of 12.1h of sunshine.

What is the coldest month in Walla Walla?

December is the coldest month, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 27°F (-2.8°C).

What is the month with the shortest days in Walla Walla?

December has the shortest days of the year in Walla Walla, Washington, with an average of 8.7h of daylight.
Average temperature - Walla Walla, WA
Average rainfall - Walla Walla, WA
Average rainfall days - Walla Walla, WA

The month with the highest number of rainy days is March (17.4 days).
The month with the lowest number of rainy days is July (4.9 days).

Average snowfall - Walla Walla, WA
Average snowfall days - Walla Walla, WA

Months with the highest number of snowfall days are February and December (6.1 days).
Months with the lowest number of snowfall days are May, June, July and August (0 days).

Average daylight / Average sunshine - Walla Walla, WA
Average UV index - Walla Walla, WA