August weather forecast
Grand Lake, CO

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Weather in August

August, the last month of the summer in Grand Lake, is another pleasant month, with an average temperature varying between 70.7°F (21.5°C) and 40.8°F (4.9°C).

Temperature

With the onset of August, Grand Lake's average high-temperature clocks in at a still agreeable 70.7°F (21.5°C), showing a minor fluctuation from the previous month. Grand Lake's August nights cool down significantly from the day's heat, to an average low-temperature of 40.8°F (4.9°C).

Humidity

The average relative humidity in August in Grand Lake, Colorado, is 52%.

Rainfall

In Grand Lake, during August, the rain falls for 9.2 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Grand Lake, Colorado, during the entire year, the rain falls for 82.5 days and collects up to 8.19" (208mm) of precipitation.

Snowfall

In Grand Lake, snow does not fall in July and August.

Daylight

The average length of the day in August is 13h and 43min.
On the first day of the month, sunrise is at 6:01 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:30 am and sunset at 7:36 pm MDT.

Sunshine

August has the most sunshine of the year in Grand Lake, with an average of 11.8h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 4 in August converts into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

What is the average August temperature in Grand Lake?

In August, in Grand Lake, the average high-temperature is 70.7°F (21.5°C), and the average low-temperature is 40.8°F (4.9°C).

What is the average humidity in August in Grand Lake?

In August, the average relative humidity is 52%.

How much does it rain in Grand Lake in August?

In August, the rain falls for 9.2 days. Throughout August, 0.55" (14mm) of precipitation is accumulated.

When it does not snow in Grand Lake?

July and August are months without snowfall in Grand Lake.

Does it snow in Grand Lake in August?

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

What is the average length of the day in August in Grand Lake?

In August, the average day length in Grand Lake is 13h and 43min.

What time are sunrise and sunset in August in Grand Lake?

On the first day of August in Grand Lake, Colorado, sunrise is at 6:01 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:36 pm MDT.

What month has the most sunshine in Grand Lake?

August has the most sunshine of the year, with an average of 11.8h of sunshine.

How many hours of sunshine does Grand Lake have in August?

In Grand Lake, Colorado, the average sunshine duration in August is 11.8h.

What are the months with the highest UV index in Grand Lake?

June through August, with an average maximum UV index of 4, are months with the highest UV index in Grand Lake.

What is the UV index intensity in August in Grand Lake?

The average daily maximum UV index in August in Grand Lake is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe 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
Grand Lake, CO

Average temperature in August - Grand Lake, CO
  • Average high temperature in August: 70.7°F

The warmest month (with the highest average high temperature) is July (72.1°F).
The month with the lowest average high temperature is December (23.4°F).

  • Average low temperature in August: 40.8°F

The month with the highest average low temperature is July (42.6°F).
The coldest month (with the lowest average low temperature) is January (2.5°F).

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Average pressure in August
Grand Lake, CO

Average pressure in August - Grand Lake, CO
  • Average pressure in August: 30.03"Hg

The month with the highest atmospheric pressure is January (30.2"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.93"Hg).

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Average wind speed in August
Grand Lake, CO

Average wind speed in August - Grand Lake, CO
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is June (7mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).

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Average humidity in August
Grand Lake, CO

Average humidity in August - Grand Lake, CO
  • Average humidity in August: 52%

The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is June (49%).

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Average rainfall in August
Grand Lake, CO

Average rainfall in August - Grand Lake, CO
  • Average rainfall in August: 0.55"

The wettest month (with the highest rainfall) is July (1.06").
The driest months (with the least rainfall) are September, November and December (0.39").

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Average rainfall days in August
Grand Lake, CO

Average rainfall days in August - Grand Lake, CO
  • Average rainfall days in August: 9.2 days

The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (3.3 days).

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Average snowfall in August
Grand Lake, CO

Average snowfall in August - Grand Lake, CO
  • Average snowfall in August: 0"

The month with the highest snowfall is April (6.81").
The months with the least snowfall are July and August (0").

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Average snowfall days in August
Grand Lake, CO

Average snowfall days in August - Grand Lake, CO
  • Average snowfall days in August: 0.1 days

The month with the highest number of snowfall days is February (13.8 days).
The months with the least snowfall days are July and August (0.1 days).

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Average daylight in August /
Average sunshine in August
Grand Lake, CO

Average daylight in August / Average sunshine in August - Grand Lake, CO
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 11h and 5min

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

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Average sunshine days in August
Grand Lake, CO

Average sunshine days in August - Grand Lake, CO
  • Average sunshine days in August: 17 days

The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is July (13.1 days).

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Average UV index in August
Grand Lake, CO

Average UV index in August - Grand Lake, CO
  • Average UV index in August: 4

The months with the highest UV index are June, July and August (UV index 4).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in August
Grand Lake, CO

Average cloud cover in August - Grand Lake, CO
  • Average cloud cover in August: 16

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 15).

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Average visibility in August
Grand Lake, CO

Average visibility in August - Grand Lake, CO
  • Average visibility in August: 6mi

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

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Grand Lake, Colorado, USA

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