Climate and monthly weather forecastClayton, WA
Climate and monthly weather forecast
Weather in January
January in Clayton, Washington, is a wintry winter month, with an average temperature varying between 32.4°F (0.2°C) and 21.2°F (-6°C). Welcoming January, Clayton notes an average high-temperature of an icy 32.4°F (0.2°C), nearly consistent with December's 31.3°F (-0.4°C). Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Clayton, Washington, with an average temperature fluctuating between 35.1°F (1.7°C) and 21.6°F (-5.8°C). The onset of February notes an average high-temperature of a still cold 35.1°F (1.7°C), subtly shifted from January's 32.4°F (0.2°C). Weather in February »Weather in March
March, the first month of the spring in Clayton, is a chilly month, with an average temperature fluctuating between 44.8°F (7.1°C) and 28.9°F (-1.7°C). With the onset of March, Clayton's average high-temperature experiences a rise, moving from February's icy 35.1°F (1.7°C) to a chilly 44.8°F (7.1°C). Weather in March »Weather in April
April in Clayton, Washington, is a fresh spring month, with temperature in the range of an average low of 33.6°F (0.9°C) and an average high of 54.7°F (12.6°C). The start of April is characterized by an increase in the average high-temperature, transitioning from a frosty 44.8°F (7.1°C) in March to a cool 54.7°F (12.6°C). Weather in April »Weather in May
May, the last month of the spring in Clayton, is a comfortable month, with an average temperature varying between 65.8°F (18.8°C) and 41.4°F (5.2°C). May brings a temperature increase, with average high-temperatures moving from April's fresh 54.7°F (12.6°C) to a refreshing 65.8°F (18.8°C). Weather in May »Weather in June
June, the first month of the summer in Clayton, is an agreeable month, with an average temperature ranging between max 71.8°F (22.1°C) and min 46°F (7.8°C). Clayton in June experiences a slight uptick in the average high-temperature, adjusting from May's comfortable 65.8°F (18.8°C) to a pleasant 71.8°F (22.1°C). Weather in June »Weather in July
July is a warm summer month in Clayton, Washington, with an average temperature ranging between max 83.5°F (28.6°C) and min 52.5°F (11.4°C). July sees a rise in the average high-temperature, climbing from an agreeable 71.8°F (22.1°C) in June to a moderately hot 83.5°F (28.6°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Clayton, Washington, with an average temperature fluctuating between 54.3°F (12.4°C) and 84°F (28.9°C). August, with its average high-temperature of 84°F (28.9°C) and an average low-temperature of 54.3°F (12.4°C), holds the record as the warmest month. For most parts of August, the heat index is computed to be 84.2°F (29°C). Weather in August »Weather in September
September, the first month of the autumn in Clayton, is still a pleasant month, with an average temperature fluctuating between 46.6°F (8.1°C) and 72.7°F (22.6°C). As August transitions into September, Clayton sees a drop in the average high-temperature, transitioning from a warm 84°F (28.9°C) to a pleasant 72.7°F (22.6°C). Weather in September »Weather in October
October, the same as September, in Clayton, Washington, is a moderate autumn month, with temperature in the range of an average high of 55.8°F (13.2°C) and an average low of 36.7°F (2.6°C). As October sets, the average high-temperature displays a significant decrease, moving down from an agreeable 72.7°F (22.6°C) in September to a moderate 55.8°F (13.2°C). Weather in October »Weather in November
The last month of the autumn, November, is another cold month in Clayton, Washington, with an average temperature ranging between min 28.2°F (-2.1°C) and max 40.5°F (4.7°C). The arrival of November signals a clear decrease in the average high-temperature, falling from a mild 55.8°F (13.2°C) in October to an icy 40.5°F (4.7°C). Weather in November »Weather in December
The first month of the winter, December, is still a freezing cold month in Clayton, Washington, with an average temperature ranging between min 20.3°F (-6.5°C) and max 31.3°F (-0.4°C). The month of December sees the lowest average temperatures, reaching 31.3°F (-0.4°C) at the peak and 20.3°F (-6.5°C) at the low. Weather in December »Updated: Jul 30, 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
With an average relative humidity of 92%, January is the most humid month.
The month with the most rainfall is January, when the rain falls for 8.8 days and typically aggregates up to 2.4" (61mm) of precipitation.
In Clayton, during the entire year, the rain falls for 124.9 days and collects up to 17.44" (443mm) of precipitation.
Months with snowfall are January through May, September through December.
The month with the most snowfall is January, when snow falls for 16 days and typically aggregates up to 13.23" (336mm) of snow.
Throughout the year, there are 69.2 snowfall days, and 42.99" (1092mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 3.4h of sunshine.
February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Clayton, 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.
In Clayton, snow does not fall in June through August.
The month with the longest days is June, with an average of 16h and 0min of daylight.
The month with the highest UV index is July, with an average maximum UV index of 6.
Clayton experiences its average highest temperatures in August, reaching a peak of 84°F (28.9°C) and a minimum of 54.3°F (12.4°C).
The least humid month is August, with an average relative humidity of 43%.
The month with the least rainfall in Clayton, Washington, is August, when the rain falls for 5.1 days and typically collects 0.31" (8mm) of precipitation.
The month with the most sunshine is August, with an average of 12h of sunshine.
In Clayton, December is the coldest month, with temperatures averaging a high of 31.3°F (-0.4°C) and a low of 20.3°F (-6.5°C).
December has the shortest days of the year, with an average of 8h and 30min of daylight.
Average temperature
Clayton, WA
The warmest month (with the highest average high temperature) is August (84°F).
The month with the lowest average high temperature is December (31.3°F).
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure
Clayton, WA
- Average pressure in January:
30.19"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.17"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed
Clayton, WA
- Average wind speed in January:
4.1mph - Average wind speed in February:
4.4mph - Average wind speed in March:
5.2mph - Average wind speed in April:
5.6mph - Average wind speed in May:
5.2mph - Average wind speed in June:
5mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.7mph - Average wind speed in September:
4.7mph - Average wind speed in October:
4.5mph - Average wind speed in November:
4.5mph - Average wind speed in December:
4mph
The windiest month (with the highest average wind speed) is April (5.6mph).
The calmest month (with the lowest average wind speed) is December (4mph).
Average humidity
Clayton, WA
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (43%).
Average rainfall
Clayton, WA
- Average rainfall in January:
2.4" - Average rainfall in February:
1.54" - Average rainfall in March:
2.09" - Average rainfall in April:
1.42" - Average rainfall in May:
1.69" - Average rainfall in June:
1.26"
- Average rainfall in July:
0.39" - Average rainfall in August:
0.31" - Average rainfall in September:
0.63" - Average rainfall in October:
1.65" - Average rainfall in November:
1.77" - Average rainfall in December:
2.28"
The wettest month (with the highest rainfall) is January (2.4").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days
Clayton, WA
- Average rainfall days in January:
8.8 days - Average rainfall days in February:
8.2 days - Average rainfall days in March:
16.2 days - Average rainfall days in April:
15.4 days - Average rainfall days in May:
12.8 days - Average rainfall days in June:
11.5 days
- Average rainfall days in July:
5.3 days - Average rainfall days in August:
5.1 days - Average rainfall days in September:
7 days - Average rainfall days in October:
12.3 days - Average rainfall days in November:
13.1 days - Average rainfall days in December:
9.2 days
The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is August (5.1 days).
Average snowfall
Clayton, WA
- Average snowfall in January:
13.23" - Average snowfall in February:
8.62" - Average snowfall in March:
4.88" - Average snowfall in April:
1.02" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (13.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Clayton, WA
- Average snowfall days in January:
16 days - Average snowfall days in February:
14.4 days - Average snowfall days in March:
8.9 days - Average snowfall days in April:
2.8 days - Average snowfall days in May:
0.2 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:
0.2 days - Average snowfall days in October:
1 days - Average snowfall days in November:
8.8 days - Average snowfall days in December:
16.9 days
The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Clayton, 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 12min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 18min - Average daylight in December:
8h and 30min
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 30min).
- Average sunshine in January:
3h and 24min - Average sunshine in February:
3h and 42min - Average sunshine in March:
5h and 48min - Average sunshine in April:
8h and 54min - Average sunshine in May:
10h and 12min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 6min - Average sunshine in October:
6h and 12min - Average sunshine in November:
4h and 36min - Average sunshine in December:
3h and 30min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days
Clayton, WA
- Average sunshine days in January:
11.6 days - Average sunshine days in February:
10.4 days - Average sunshine days in March:
9.7 days - Average sunshine days in April:
12.1 days - Average sunshine days in May:
16.4 days - Average sunshine days in June:
16.9 days
- Average sunshine days in July:
24.2 days - Average sunshine days in August:
23.8 days - Average sunshine days in September:
21.3 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
10.5 days - Average sunshine days in December:
11.5 days
The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is March (9.7 days).
Average UV index
Clayton, WA
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover
Clayton, WA
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility
Clayton, WA
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
