Climate and monthly weather forecast
Richland, WA

Weather in January

January, the same as December, is a wintry winter month in Richland, Washington, with an average temperature fluctuating between 38.8°F (3.8°C) and 28.8°F (-1.8°C). In January, the average high-temperature is relatively the same as in December - a still cold 38.8°F (3.8°C). Weather in January »

Weather in February

The last month of the winter, February, is a chilly month in Richland, Washington, with an average temperature fluctuating between 32.5°F (0.3°C) and 44.4°F (6.9°C). In February, the average high-temperature marginally rises from a wintry 38.8°F (3.8°C) in January to a frosty 44.4°F (6.9°C). Weather in February »

Weather in March

March, the first month of the spring in Richland, is a fresh month, with an average temperature varying between 37.9°F (3.3°C) and 54.7°F (12.6°C). In Richland, the average high-temperature in March rises from a frosty 44.4°F (6.9°C) in February to a cool 54.7°F (12.6°C). Weather in March »

Weather in April

April is a comfortable spring month in Richland, Washington, with an average temperature varying between 43.2°F (6.2°C) and 63.3°F (17.4°C). In April, the average high-temperature marginally rises from a cool 54.7°F (12.6°C) in March to an enjoyable 63.3°F (17.4°C). Weather in April »

Weather in May

May, the last month of the spring in Richland, is a pleasant month, with an average temperature fluctuating between 50.7°F (10.4°C) and 73°F (22.8°C). In Richland, the average high-temperature in May increases from a comfortable 63.3°F (17.4°C) in April to a pleasant 73°F (22.8°C). Weather in May »

Weather in June

June, the first month of the summer in Richland, is a moderately hot month, with an average temperature fluctuating between 56.7°F (13.7°C) and 80.2°F (26.8°C). In June, the average high-temperature slightly increases from an agreeable 73°F (22.8°C) in May to a warm 80.2°F (26.8°C). Weather in June »

Weather in July

July in Richland, Washington, is a tropical summer month, with an average temperature ranging between min 62.8°F (17.1°C) and max 90.1°F (32.3°C). With an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 62.8°F (17.1°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Richland, Washington, with an average temperature ranging between max 89.4°F (31.9°C) and min 64.2°F (17.9°C). In Richland, Washington, the average high-temperature in August is relatively the same as in July - a still hot 89.4°F (31.9°C). Weather in August »

Weather in September

September, the first month of the autumn in Richland, is also a moderately hot month, with an average temperature fluctuating between 78.6°F (25.9°C) and 57°F (13.9°C). In September, the average high-temperature drops from a tropical 89.4°F (31.9°C) in August to a warm 78.6°F (25.9°C). Weather in September »

Weather in October

October, like September, in Richland, Washington, is another enjoyable autumn month, with temperature in the range of an average high of 62.4°F (16.9°C) and an average low of 46.6°F (8.1°C). In October, the average high-temperature plummets from a warm 78.6°F (25.9°C) in September to a comfortable 62.4°F (16.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Richland, is also a frosty month, with temperature in the range of an average high of 48.7°F (9.3°C) and an average low of 36.3°F (2.4°C). In November, the average high-temperature decreases from a comfortable 62.4°F (16.9°C) in October to a chilly 48.7°F (9.3°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Richland, Washington, with an average temperature fluctuating between 38.1°F (3.4°C) and 27.5°F (-2.5°C). With an average high-temperature of 38.1°F (3.4°C) and an average low-temperature of 27.5°F (-2.5°C), December is the coldest month. Weather in December »
[Resources]

FAQ

What is the most humid month in Richland?

With an average relative humidity of 81%, January is the most humid month in Richland.

How many days does it rain in Richland?

Throughout the year, there are 100.2 rainfall days, and 7.05" (179mm) of precipitation is accumulated.

When does it snow in Richland?

Months with snowfall in Richland, Washington, are January through March, November and December.

How many days does it snow in Richland?

In Richland, Washington, during the entire year, snow falls for 10.4 days and aggregates up to 5.35" (136mm) of snow.

What is the month with the least sunshine in Richland?

With an average of 5.4h of sunshine, January has the least sunshine of the year in Richland, Washington.

When is the lowest UV index in Richland?

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 Richland?

February is the month with the most snowfall. Snow falls for 2.9 days and accumulates 2.2" (56mm) of snow.

When is Daylight Saving Time (DST) in Richland?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Richland, Washington, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow in Richland?

April through October are months without snowfall.

When are the longest days in Richland?

With an average of 15h and 44min of daylight, June has the longest days of the year in Richland.

What is the warmest month in Richland?

With an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 62.8°F (17.1°C), July is the warmest month.

What is the least humid month in Richland?

The least humid month in Richland, Washington, is July, with an average relative humidity of 35%.

What is the driest month in Richland?

July and September are months with the least rain in Richland, Washington, when the rain falls for 3.5 days and typically aggregates up to 0.2" (5mm) of rain.

What month has the most sunshine in Richland?

The month with the most sunshine is July, with an average of 12.1h of sunshine.

When is the highest UV index in Richland?

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

What is the coldest month in Richland?

December is the coldest month in Richland, Washington, with an average high-temperature of 38.1°F (3.4°C) and an average low-temperature of 27.5°F (-2.5°C).

What is the rainiest month in Richland?

The month with the most rainfall is December, when the rain falls for 10.3 days and typically aggregates up to 0.94" (24mm) of precipitation.

What is the month with the shortest days in Richland?

December has the shortest days of the year, with an average of 8h and 41min of daylight.

Average temperature
Richland, WA

Average temperature - Richland, WA

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (38.1°F).

The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (27.5°F).

[Resources]

Average pressure
Richland, WA

Average pressure - Richland, WA

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).

[Resources]

Average wind speed
Richland, WA

Average wind speed - Richland, WA

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5.6mph).

[Resources]

Average rainfall
Richland, WA

Average rainfall - Richland, WA

The wettest month (with the highest rainfall) is December (0.94").
The driest months (with the least rainfall) are July and September (0.2").

[Resources]

Average rainfall days
Richland, WA

Average rainfall days - Richland, WA

The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is July (3.5 days).

[Resources]

Average snowfall
Richland, WA

Average snowfall - Richland, WA

The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days
Richland, WA

Average snowfall days - Richland, WA

The month with the highest number of snowfall days is December (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

[Resources]

Average daylight / Average sunshine
Richland, WA

Average daylight / Average sunshine - Richland, WA

The month with the longest days is June (Average daylight: 15h and 44min).
The month with the shortest days is December (Average daylight: 8h and 41min).

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

[Resources]

Average sunshine days
Richland, WA

Average sunshine days - Richland, WA

The month with the most sunshine days is July (25.7 days).
The months with the least sunshine days are February and March (15.3 days).

[Resources]

Average UV index
Richland, WA

Average UV index - Richland, WA

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

[Resources]

Average visibility
Richland, WA

Average visibility - Richland, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location