August weather forecast
Jefferson, CO

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Weather in August

The last month of the summer, August, is also an enjoyable month in Jefferson, Colorado, with an average temperature ranging between max 63.7°F (17.6°C) and min 37.9°F (3.3°C).

Temperature

August ushers in an average high-temperature of a still enjoyable 63.7°F (17.6°C), aligning closely with the preceding month. In August, Jefferson experiences a significant drop from daily zeniths to an average nighttime temperature of 37.9°F (3.3°C).

Humidity

The average relative humidity in August in Jefferson is 61%.

Rainfall

In August, in Jefferson, the rain falls for 17.8 days. Throughout August, 2.2" (56mm) of precipitation is accumulated. In Jefferson, during the entire year, the rain falls for 110.4 days and collects up to 24.09" (612mm) of precipitation.

Snowfall

Months with snowfall in Jefferson are January through December. In August, in Jefferson, it is snowing for 2.2 days. Throughout August, 0.47" (12mm) of snow is accumulated. In Jefferson, during the entire year, snow falls for 158 days and aggregates up to 118.82" (3018mm) of snow.

Daylight

In August, the average length of the day is 13h and 40min.
On the first day of August in Jefferson, sunrise is at 6:03 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 7:35 pm MDT.

Sunshine

In Jefferson, Colorado, the average sunshine in August is 11h.

UV index

The months with the highest UV index in Jefferson are May through August, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In August, the maximum UV index of 3 suggests this advice:
Guard yourself - Precautionary measures against sun damage are advocated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What is the usual temperature for Jefferson in August?

Jefferson in August has an average high-temperature of 63.7°F (17.6°C) and an average low-temperature of 37.9°F (3.3°C).

What is the average humidity in August in Jefferson?

In Jefferson, the average relative humidity in August is 61%.

How many days does it rain in August in Jefferson?

In Jefferson, in August, it is raining for 17.8 days, with typically 2.2" (56mm) of accumulated precipitation.

How much does it snow in Jefferson in August?

In Jefferson, during August, snow falls for 2.2 days and regularly aggregates up to 0.47" (12mm) of snow.

How many hours of daylight does Jefferson have in August?

In August, the average day length in Jefferson, Colorado, is 13h and 40min.

When is the sunrise / sunset in August in Jefferson?

On the first day of August, sunrise is at 6:03 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 7:35 pm MDT.

How long on average sun shines in August in Jefferson?

In August, the average sunshine duration in Jefferson, Colorado, is 11h.

What is the month with the highest UV index in Jefferson?

May through August, with an average maximum UV index of 3, are months with the highest UV index.

What is the UV index reading in August in Jefferson?

In August, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Jefferson, CO

Average temperature in August - Jefferson, CO
  • Average high temperature in August: 63.7°F

The warmest month (with the highest average high temperature) is July (65.8°F).
The month with the lowest average high temperature is December (21.2°F).

  • Average low temperature in August: 37.9°F

The month with the highest average low temperature is July (40.1°F).
The coldest months (with the lowest average low temperature) are January and December (0.7°F).

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Average pressure in August
Jefferson, CO

Average pressure in August - Jefferson, CO
  • Average pressure in August: 30.06"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are April and May (29.94"Hg).

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Average wind speed in August
Jefferson, CO

Average wind speed in August - Jefferson, CO
  • Average wind speed in August: 4.8mph

The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in August
Jefferson, CO

Average humidity in August - Jefferson, CO
  • Average humidity in August: 61%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is June (54%).

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Average rainfall in August
Jefferson, CO

Average rainfall in August - Jefferson, CO
  • Average rainfall in August: 2.2"

The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is November (1.14").

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Average rainfall days in August
Jefferson, CO

Average rainfall days in August - Jefferson, CO
  • Average rainfall days in August: 17.8 days

The month with the highest number of rainy days is July (22.8 days).
The month with the least rainy days is November (2.8 days).

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Average snowfall in August
Jefferson, CO

Average snowfall in August - Jefferson, CO
  • Average snowfall in August: 0.47"

The month with the highest snowfall is May (19.69").
The month with the least snowfall is July (0.24").

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Average snowfall days in August
Jefferson, CO

Average snowfall days in August - Jefferson, CO
  • Average snowfall days in August: 2.2 days

The month with the highest number of snowfall days is April (22.8 days).
The month with the least snowfall days is July (1.3 days).

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Average daylight in August /
Average sunshine in August
Jefferson, CO

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 11h and 0min

The month with the most sunshine is June (Average sunshine: 11h and 24min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).

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Average sunshine days in August
Jefferson, CO

Average sunshine days in August - Jefferson, CO
  • Average sunshine days in August: 9 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is July (5.8 days).

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Average UV index in August
Jefferson, CO

Average UV index in August - Jefferson, CO
  • Average UV index in August: 3

The months with the highest UV index are May, June, July and August (UV index 3).
The months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in August
Jefferson, CO

Average cloud cover in August - Jefferson, CO
  • Average cloud cover in August: 25

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 19).

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Average visibility in August
Jefferson, CO

Average visibility in August - Jefferson, CO
  • Average visibility in August: 6mi

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

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Jefferson, Colorado, USA

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