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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, like December, in West Richland, Washington, is a wintry winter month, with an average temperature fluctuating between 28.8°F (-1.8°C) and 38.8°F (3.8°C). The average high-temperature is a still icy 38.8°F (3.8°C) in January, hardly different from the 38.1°F (3.4°C) recorded in December. Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in West Richland, Washington, with an average temperature fluctuating between 44.4°F (6.9°C) and 32.5°F (0.3°C). The start of February signals a slight increase in the average high-temperature, moving 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
The first month of the spring, March, is a fresh month in West Richland, Washington, with temperature in the range of an average high of 54.7°F (12.6°C) and an average low of 37.9°F (3.3°C). The rise of average high-temperatures is seen in March, with an increase from a chilly 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 an enjoyable spring month in West Richland, Washington, with an average temperature fluctuating between 63.3°F (17.4°C) and 43.2°F (6.2°C). The arrival of April brings a soft temperature shift, with the average high-temperature nudging 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 West Richland, is a pleasant month, with an average temperature ranging between min 50.7°F (10.4°C) and max 73°F (22.8°C). West Richland's May weather shows an increase in high-temperatures, moving from April's refreshing 63.3°F (17.4°C) to an agreeable 73°F (22.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in West Richland, Washington, with an average temperature fluctuating between 80.2°F (26.8°C) and 56.7°F (13.7°C). The average high-temperature mildly increases in June, edging from a pleasant 73°F (22.8°C) in May to a moderately hot 80.2°F (26.8°C). Weather in June »
Weather in July
July is a hot summer month in West Richland, Washington, with an average temperature fluctuating between 90.1°F (32.3°C) and 62.8°F (17.1°C). The warmest temperatures occur during July, when averages reach a peak of 90.1°F (32.3°C) and a low of 62.8°F (17.1°C). Weather in July »
Weather in August
August, the last month of the summer in West Richland, is also a hot month, with temperature in the range of an average high of 89.4°F (31.9°C) and an average low of 64.2°F (17.9°C). As August unfolds, the average high-temperature reaches a still tropical 89.4°F (31.9°C), hinting at a slight fluctuation from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in West Richland, is also a moderately hot month, with an average temperature varying between 57°F (13.9°C) and 78.6°F (25.9°C). September brings a decrease in the average high-temperature, falling from August's hot 89.4°F (31.9°C) to a warm 78.6°F (25.9°C). Weather in September »
Weather in October
October, like September, in West Richland, Washington, is another refreshing 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). West Richland sees a considerable decrease in average high-temperatures during October, falling from a moderately hot 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 West Richland, is also a frosty month, with an average temperature varying between 36.3°F (2.4°C) and 48.7°F (9.3°C). The shift from October to November involves a decrease in the average high-temperature, dropping from a comfortable 62.4°F (16.9°C) to a chilly 48.7°F (9.3°C). Weather in November »
Weather in December
December, the first month of the winter in West Richland, is also a wintry month, with an average temperature ranging between min 27.5°F (-2.5°C) and max 38.1°F (3.4°C). West Richland's coldest weather arrives in December, when temperatures average a high of 38.1°F (3.4°C) and a low of 27.5°F (-2.5°C). Weather in December »
Updated: Jul 23, 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
What is the most humid month?
The most humid month is January, with an average relative humidity of 81%.
How many days does it rain?
In West Richland, during the entire year, the rain falls for 100.2 days and collects up to 7.05" (179mm) of precipitation.
When does it snow?
January through March, November and December are months with snowfall.
How much does it snow?
In West Richland, 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?
January has the least sunshine of the year, with an average of 5.4h of sunshine.
What is the month with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
When does it snow the most?
The month with the most snowfall is February, when snow falls for 2.9 days and typically aggregates up to 2.2" (56mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in West Richland, 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.
When it does not snow?
April through October are months without snowfall in West Richland.
When are the longest days?
The month with the longest days is June, with an average of 15h and 42min of daylight.
What time of the year is the hottest in West Richland?
July, on average, is the warmest month, registering a high temperature of 90.1°F (32.3°C) and a low of 62.8°F (17.1°C).
What is the least humid month in West Richland?
The least humid month is July, with an average relative humidity of 35%.
What is the driest month?
July and September are months with the least rain when the rain falls for 3.5 days and typically aggregates up to 0.2" (5mm) of rain.
What month has the most sunshine?
July has the most sunshine of the year, with an average of 12.1h of sunshine.
What is the month with the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 7.
What part of the year is the coldest?
December, with an average high of 38.1°F (3.4°C) and a low of 27.5°F (-2.5°C), signifies the coldest month of the year.
What is the rainiest month?
December is the month with the most rainfall. Rain falls for 10.3 days and accumulates 0.94" (24mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 42min of daylight.
Average temperature
West 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).
Average pressure
West Richland, WA
- Average pressure in January:
30.18"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.16"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed
West Richland, WA
- Average wind speed in January:
6mph - Average wind speed in February:
6.7mph - Average wind speed in March:
8mph - Average wind speed in April:
8.3mph - Average wind speed in May:
7.3mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
6.6mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.5mph - Average wind speed in December:
5.6mph
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).
Average humidity
West Richland, WA
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is July (35%).
Average rainfall
West Richland, WA
- Average rainfall in January:
0.91" - Average rainfall in February:
0.79" - Average rainfall in March:
0.87" - Average rainfall in April:
0.51" - Average rainfall in May:
0.67" - Average rainfall in June:
0.47"
The wettest month (with the highest rainfall) is December (0.94").
The driest months (with the least rainfall) are July and September (0.2").
Average rainfall days
West Richland, WA
- Average rainfall days in January:
10.9 days - Average rainfall days in February:
9 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
9.9 days - Average rainfall days in May:
8.8 days - Average rainfall days in June:
6.6 days
- Average rainfall days in July:
3.5 days - Average rainfall days in August:
4.3 days - Average rainfall days in September:
4 days - Average rainfall days in October:
10 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
10.3 days
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).
Average snowfall
West 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").
Average snowfall days
West Richland, WA
- Average snowfall days in January:
2.5 days - Average snowfall days in February:
2.9 days - Average snowfall days in March:
0.8 days - Average snowfall days in April:
0 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:
0.9 days - Average snowfall days in December:
3.3 days
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).
Average daylight / Average sunshine
West Richland, WA
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 2min - Average daylight in December:
8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
5h and 2min - Average sunshine in February:
5h and 5min - Average sunshine in March:
7h and 5min - Average sunshine in April:
10h and 1min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 3min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 5min - Average sunshine in October:
6h and 5min - Average sunshine in November:
6h and 2min - Average sunshine in December:
5h and 4min
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).
Average sunshine days
West Richland, WA
- Average sunshine days in January:
16.2 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
17 days - Average sunshine days in May:
19.8 days - Average sunshine days in June:
22.3 days
- Average sunshine days in July:
25.7 days - Average sunshine days in August:
24.1 days - Average sunshine days in September:
24.2 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
16.6 days - Average sunshine days in December:
16.6 days
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).
Average UV index
West 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).
Average cloud cover
West Richland, WA
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility
West 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).
West Richland, Washington, USA
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