June weather forecast
Jefferson, CO

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Weather in June

The first month of the summer, June, is an enjoyable month in Jefferson, Colorado, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 35.1°F (1.7°C).

Temperature

As June sets, the average high-temperature displays a significant increase, moving up from a chilly 45.5°F (7.5°C) in May to an enjoyable 61.3°F (16.3°C). Jefferson sees a major change from daytime highs, with the nighttime temperature dipping to a wintry 35.1°F (1.7°C) on average during June.

Humidity

June is the least humid month in Jefferson, with an average relative humidity of 54%.

Rainfall

In Jefferson, Colorado, during June, the rain falls for 13.3 days and regularly aggregates up to 2.17" (55mm) of precipitation. In Jefferson, during the entire year, the rain falls for 110.4 days and collects up to 24.09" (612mm) of precipitation.

Snowfall

January through December are months with snowfall. In June, it is snowing for 6.5 days. Throughout June, 4.06" (103mm) of snow is accumulated. Throughout the year, there are 158 snowfall days, and 118.82" (3018mm) of snow is accumulated.

Daylight

June has the longest days of the year in Jefferson, with an average of 14h and 54min of daylight.
On the first day of June in Jefferson, sunrise is at 5:37 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:34 pm MDT.

Sunshine

The month with the most sunshine is June, with an average of 11.4h of sunshine.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 3 in June, converts into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
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Frequently asked questions

What is the temperature in June in Jefferson?

June temperatures in Jefferson vary between a high-temperature of 61.3°F (16.3°C) and a low-temperature of 35.1°F (1.7°C).

What is the least humid month in Jefferson?

The least humid month in Jefferson is June, with an average relative humidity of 54%.

What is the average humidity in June in Jefferson?

In June, the average relative humidity in Jefferson is 54%.

How many days does it rain in June in Jefferson?

In Jefferson, Colorado, in June, it is raining for 13.3 days, with typically 2.17" (55mm) of accumulated precipitation.

How much does it snow in Jefferson in June?

In June, in Jefferson, it is snowing for 6.5 days. Throughout June, 4.06" (103mm) of snow is accumulated.

When are the longest days in Jefferson?

With an average of 14h and 54min of daylight, June has the longest days of the year in Jefferson, Colorado.

How many hours of daylight does Jefferson have in June?

In Jefferson, the average day length in June is 14h and 54min.

When is the sunrise / sunset in June in Jefferson?

In June, on the first day of the month, sunrise is at 5:37 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:34 pm MDT.

What month has the most sunshine in Jefferson?

With an average of 11.4h of sunshine, June has the most sunshine of the year in Jefferson.

How long on average sun shines in June in Jefferson?

The average sunshine duration in June in Jefferson, Colorado, is 11.4h.

When is the highest UV index in Jefferson?

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

What is the UV index intensity in June in Jefferson?

The average daily maximum UV index in June in Jefferson, Colorado, is 3. A UV Index reading of 3 to 5 represents a medium health risk 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 June
Jefferson, CO

Average temperature in June - Jefferson, CO
  • Average high temperature in June: 61.3°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 June: 35.1°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 June
Jefferson, CO

Average pressure in June - Jefferson, CO
  • Average pressure in June: 29.96"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 June
Jefferson, CO

Average wind speed in June - Jefferson, CO
  • Average wind speed in June: 6.5mph

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 June
Jefferson, CO

Average humidity in June - Jefferson, CO
  • Average humidity in June: 54%

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 June
Jefferson, CO

Average rainfall in June - Jefferson, CO
  • Average rainfall in June: 2.17"

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 June
Jefferson, CO

Average rainfall days in June - Jefferson, CO
  • Average rainfall days in June: 13.3 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 June
Jefferson, CO

Average snowfall in June - Jefferson, CO
  • Average snowfall in June: 4.06"

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 June
Jefferson, CO

Average snowfall days in June - Jefferson, CO
  • Average snowfall days in June: 6.5 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 June /
Average sunshine in June
Jefferson, CO

Average daylight in June / Average sunshine in June - Jefferson, CO
  • Average daylight in June: 14h and 5min

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 June: 11h and 2min

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 June
Jefferson, CO

Average sunshine days in June - Jefferson, CO
  • Average sunshine days in June: 10.9 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 June
Jefferson, CO

Average UV index in June - Jefferson, CO
  • Average UV index in June: 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 June
Jefferson, CO

Average cloud cover in June - Jefferson, CO
  • Average cloud cover in June: 19

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 June
Jefferson, CO

Average visibility in June - Jefferson, CO
  • Average visibility in June: 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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