August weather forecast
Hamilton, WA

Share

Weather in August

August, the last month of the summer in Hamilton, is also an agreeable month, with an average temperature fluctuating between 50.5°F (10.3°C) and 70.7°F (21.5°C).

Temperature

As Hamilton, Washington, welcomes August, the average high-temperature records at a still pleasant 70.7°F (21.5°C), marking an insignificant deviation from the prior month. Hamilton, during the month of August, experiences an average low-temperature of 50.5°F (10.3°C).

Humidity

In Hamilton, the average relative humidity in August is 76%.

Rainfall

In August, in Hamilton, the rain falls for 9.4 days. Throughout August, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 203.2 rainfall days, and 49.72" (1263mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Hamilton.

Daylight

In Hamilton, the average length of the day in August is 14h and 17min.
On the first day of the month, sunrise is at 5:43 am and sunset at 8:44 pm. On the last day of August, in Hamilton, Washington, sunrise is at 6:25 am and sunset at 7:50 pm PDT.

Sunshine

August has the most sunshine of the year, with an average of 10.3h of sunshine.

UV index

In August, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 4 in August leads to these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Hamilton in August?

August temperatures vary between a high-temperature of 70.7°F (21.5°C) and a low-temperature of 50.5°F (10.3°C).

What is the average humidity in August in Hamilton?

The average relative humidity in August in Hamilton is 76%.

How many days does it rain in August in Hamilton?

In Hamilton, Washington, during August, the rain falls for 9.4 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When it does not snow in Hamilton?

In Hamilton, Washington, snow does not fall in May through October.

How many hours of daylight does Hamilton have in August?

In Hamilton, the average day length in August is 14h and 17min.

When is the sunrise / sunset in August in Hamilton?

In August, on the first day of the month, sunrise is at 5:43 am and sunset at 8:44 pm. On the last day of the month, in Hamilton, sunrise is at 6:25 am and sunset at 7:50 pm PDT.

What month has the most sunshine in Hamilton?

The month with the most sunshine is August, with an average of 10.3h of sunshine.

How long on average sun shines in August in Hamilton?

The average sunshine duration in August in Hamilton is 10.3h.

What is the UV index reading in August in Hamilton?

The average daily maximum UV index in August is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health 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
Hamilton, WA

Average temperature in August - Hamilton, WA
  • Average high temperature in August: 70.7°F

The warmest month (with the highest average high temperature) is July (70.9°F).
The month with the lowest average high temperature is December (40.5°F).

  • Average low temperature in August: 50.5°F

The month with the highest average low temperature is August (50.5°F).
The coldest months (with the lowest average low temperature) are February and December (32.5°F).

Average pressure in August
Hamilton, WA

Average pressure in August - Hamilton, WA
  • Average pressure in August: 30"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed in August
Hamilton, WA

Average wind speed in August - Hamilton, WA
  • Average wind speed in August: 3.3mph

The windiest month (with the highest average wind speed) is November (5.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

Average humidity in August
Hamilton, WA

Average humidity in August - Hamilton, WA
  • Average humidity in August: 76%

The months with the highest relative humidity are January, February and March (86%).
The month with the lowest relative humidity is July (75%).

Average rainfall in August
Hamilton, WA

Average rainfall in August - Hamilton, WA
  • Average rainfall in August: 1.14"

The wettest month (with the highest rainfall) is November (7.09").
The driest month (with the least rainfall) is July (0.98").

Average rainfall days in August
Hamilton, WA

Average rainfall days in August - Hamilton, WA
  • Average rainfall days in August: 9.4 days

The month with the highest number of rainy days is March (22.1 days).
The month with the least rainy days is August (9.4 days).

Average snowfall in August
Hamilton, WA

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

The month with the highest snowfall is February (4.96").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Hamilton, WA

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

The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in August / Average sunshine in August - Hamilton, WA
  • Average daylight in August: 14h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).

Average sunshine days in August
Hamilton, WA

Average sunshine days in August - Hamilton, WA
  • Average sunshine days in August: 19.2 days

The month with the most sunshine days is August (19.2 days).
The month with the least sunshine days is March (7.3 days).

Average UV index in August
Hamilton, WA

Average UV index in August - Hamilton, WA
  • Average UV index in August: 4

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in August
Hamilton, WA

Average cloud cover in August - Hamilton, WA
  • Average cloud cover in August: 28

The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in August
Hamilton, WA

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

The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).

Hamilton, Washington, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location