August weather forecast
Prosser, WA

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Weather in August

August, the last month of the summer in Prosser, is another tropical month, with an average temperature varying between 63.1°F (17.3°C) and 87.4°F (30.8°C).

Temperature

The arrival of August sees a recorded average high-temperature of a still tropical 87.4°F (30.8°C), showing little divergence from the previous month's conditions. Despite a significant daily temperature range, Prosser's temperature falls to a steady low-temperature average of 63.1°F (17.3°C) in August.

Humidity

The months with the lowest humidity are July and August, with an average relative humidity of 37%.

Rainfall

In Prosser, Washington, in August, during 4.2 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Prosser, during the entire year, the rain falls for 97.8 days and collects up to 7.44" (189mm) of precipitation.

Snowfall

April through August and October are months without snowfall in Prosser.

Daylight

In Prosser, the average length of the day in August is 14h and 6min.
On the first day of the month, sunrise is at 5:42 am and sunset at 8:28 pm. On the last day of August, sunrise is at 6:19 am and sunset at 7:38 pm PDT.

Sunshine

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

UV index

In August, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 6 in August transforms into this advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in Prosser in August?

The average high-temperature, in August, in Prosser, is 87.4°F (30.8°C), while the average low-temperature is 63.1°F (17.3°C).

What is the least humid month in Prosser?

July and August, with an average relative humidity of 37%, are the least humid months in Prosser.

What is the average humidity in August in Prosser?

In August, the average relative humidity in Prosser, Washington, is 37%.

How much does it rain in Prosser in August?

In Prosser, in August, it is raining for 4.2 days, with typically 0.31" (8mm) of accumulated precipitation.

When it does not snow in Prosser?

April through August and October are months without snowfall in Prosser.

Does it snow in Prosser in August?

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

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

The average day length in August in Prosser, Washington, is 14h and 6min.

When are sunrise and sunset in August in Prosser?

In August, on the first day of the month, sunrise is at 5:42 am and sunset at 8:28 pm. On the last day of the month, in Prosser, sunrise is at 6:19 am and sunset at 7:38 pm PDT.

What is the month with the most sunshine in Prosser?

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

How long on average sun shines in August in Prosser?

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

What is the UV index intensity in August in Prosser?

In August, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
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
Prosser, WA

Average temperature in August - Prosser, WA
  • Average high temperature in August: 87.4°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (37.2°F).

  • Average low temperature in August: 63.1°F

The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (27°F).

Average pressure in August
Prosser, WA

Average pressure in August - Prosser, WA
  • Average pressure in August: 29.91"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 in August
Prosser, WA

Average wind speed in August - Prosser, WA
  • Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is December (5.6mph).

Average humidity in August
Prosser, WA

Average humidity in August - Prosser, WA
  • Average humidity in August: 37%

The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (37%).

Average rainfall in August
Prosser, WA

Average rainfall in August - Prosser, WA
  • Average rainfall in August: 0.31"

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

Average rainfall days in August
Prosser, WA

Average rainfall days in August - Prosser, WA
  • Average rainfall days in August: 4.2 days

The month with the highest number of rainy days is March (11.8 days).
The month with the least rainy days is July (3.6 days).

Average snowfall in August
Prosser, WA

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

The month with the highest snowfall is February (2.01").
The months with the least snowfall are April, May, June, July, August and October (0").

Average snowfall days in August
Prosser, WA

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

The month with the highest number of snowfall days is December (4.6 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).

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

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

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 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: 5h and 12min).

Average sunshine days in August
Prosser, WA

Average sunshine days in August - Prosser, WA
  • Average sunshine days in August: 24.2 days

The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is February (15.5 days).

Average UV index in August
Prosser, WA

Average UV index in August - Prosser, WA
  • Average UV index in August: 6

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 in August
Prosser, WA

Average cloud cover in August - Prosser, WA
  • Average cloud cover in August: 10

The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 9).

Average visibility in August
Prosser, WA

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

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).

Prosser, Washington, USA

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