August weather forecast
Waterville, WA

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Weather in August

August, the last month of the summer in Waterville, is another warm month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 55.8°F (13.2°C).

Temperature

The average high-temperature during August is a still moderately hot 81.9°F (27.7°C), almost matching the conditions of the preceding month. Waterville anticipates a stark contrast in temperature during August nights, with an average low of 55.8°F (13.2°C).

Heat index

The heat index for August is estimated at 82.4°F (28°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.
One should consider that heat index numbers are for shaded settings and light wind. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

The months with the lowest humidity are July and August, with an average relative humidity of 43%.

Rainfall

In Waterville, during August, the rain falls for 3.8 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, in Waterville, there are 99.9 rainfall days, and 10.47" (266mm) of precipitation is accumulated.

Snowfall

May through August are months without snowfall in Waterville.

Daylight

The average length of the day in August is 14h and 13min.
On the first day of August in Waterville, sunrise is at 5:38 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:42 pm PDT.

Sunshine

July and August, with an average of 12h of sunshine, are months with the most sunshine.

UV index

The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: In August, the maximum UV index of 5 translates into these guidelines:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

What is the temperature in August in Waterville?

During August, Waterville experiences an average high-temperature of 81.9°F (27.7°C) and a low-temperature of 55.8°F (13.2°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 82.4°F (28°C).

What are the least humid months in Waterville?

July and August, with an average relative humidity of 43%, are the least humid months in Waterville, Washington.

What is the average humidity in August in Waterville?

In Waterville, the average relative humidity in August is 43%.

How many days does it rain in August in Waterville?

In August, the rain falls for 3.8 days. Throughout August, 0.28" (7mm) of precipitation is accumulated.

When it does not snow in Waterville?

In Waterville, Washington, snow does not fall in May through August.

Does it snow in Waterville in August?

In Waterville, in August, it doesn't snow. In September, it regularly snows.

What is the average length of the day in August in Waterville?

In Waterville, the average day length in August is 14h and 13min.

What time are sunrise and sunset in August in Waterville?

On the first day of August, sunrise is at 5:38 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:42 pm PDT.

What is the month with the most sunshine in Waterville?

The months with the most sunshine in Waterville are July and August, with an average of 12h of sunshine.

How long on average sun shines in August in Waterville?

The average sunshine duration in August in Waterville, Washington, is 12h.

How high is the UV index in August in Waterville?

In August, the average daily maximum UV index in Waterville, Washington, is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Waterville, WA

Average temperature in August - Waterville, WA
  • Average high temperature in August: 81.9°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is December (30.2°F).

  • Average low temperature in August: 55.8°F

The month with the highest average low temperature is August (55.8°F).
The coldest months (with the lowest average low temperature) are January and December (19°F).

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Average pressure in August
Waterville, WA

Average pressure in August - Waterville, WA
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).

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Average wind speed in August
Waterville, WA

Average wind speed in August - Waterville, WA
  • Average wind speed in August: 5.8mph

The windiest month (with the highest average wind speed) is June (6.1mph).
The calmest months (with the lowest average wind speed) are January and December (3.5mph).

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Average humidity in August
Waterville, WA

Average humidity in August - Waterville, WA
  • Average humidity in August: 43%

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are July and August (43%).

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Average rainfall in August
Waterville, WA

Average rainfall in August - Waterville, WA
  • Average rainfall in August: 0.28"

The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in August
Waterville, WA

Average rainfall days in August - Waterville, WA
  • Average rainfall days in August: 3.8 days

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (3.8 days).

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Average snowfall in August
Waterville, WA

Average snowfall in August - Waterville, WA
  • Average snowfall in August: 0"

The month with the highest snowfall is December (9.06").
The months with the least snowfall are May, June, July and August (0").

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Average snowfall days in August
Waterville, WA

Average snowfall days in August - Waterville, WA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are May, June, July and August (0 days).

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Average daylight in August /
Average sunshine in August
Waterville, WA

Average daylight in August / Average sunshine in August - Waterville, WA
  • Average daylight in August: 14h and 1min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in August: 12h and 0min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in August
Waterville, WA

Average sunshine days in August - Waterville, WA
  • Average sunshine days in August: 24.8 days

The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (13.2 days).

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Average UV index in August
Waterville, WA

Average UV index in August - Waterville, WA
  • Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in August
Waterville, WA

Average cloud cover in August - Waterville, WA
  • Average cloud cover in August: 12

The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 12).

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Average visibility in August
Waterville, WA

Average visibility in August - Waterville, WA
  • Average visibility in August: 6mi

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).

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Waterville, Washington, USA

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