June weather forecast
Boulder, WY

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Weather in June

June, being Boulder's warmest thus far, celebrates the arrival of summer, boosting high temperatures to an average of 69.6°F (20.9°C). Compared to May, on the flip side, this month displays a noticeable cutback in precipitation, observing only 0.91" (23mm). Residents can finally enjoy longer sunshine hours as the weather becomes more pleasant. June also invites outdoor activities like hiking and bird watching, as nature reveals its fuller beauty. The weather's charm lies in its warmth tempered by a moderate breeze across the town.

Temperature

The start of June in Boulder is characterized by an increase in the average high-temperature, transitioning from a moderate 56.7°F (13.7°C) in May to a pleasant 69.6°F (20.9°C). The nighttime temperature in Boulder shows a significant divergence from the daytime highs, averaging at a frosty 47.5°F (8.6°C) in June.

Humidity

The average relative humidity in June is 41%.

Rainfall

In Boulder, in June, during 9.9 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, there are 102.6 rainfall days, and 10.75" (273mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall in Boulder. June is the last month it regularly snows in Boulder. During 0.8 snowfall days, in June, Boulder aggregates 0.67" (17mm) of snow. In Boulder, during the entire year, snow falls for 86.8 days and aggregates up to 41.77" (1061mm) of snow.

Daylight

The month with the longest days in Boulder is June, with an average of 15h and 18min of daylight.
On the first day of June, sunrise is at 5:42 am and sunset at 8:50 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 9:01 pm MDT.

Sunshine

The average sunshine in June in Boulder is 11.8h.

UV index

In Boulder, the average daily maximum UV index in June is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 5 in June translates into this advice:
Undertake precautions - It is suggested to shield oneself from sunburn. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Boulder in June?

June temperatures in Boulder, Wyoming, vary between a high-temperature of 69.6°F (20.9°C) and a low-temperature of 47.5°F (8.6°C).

What is the average humidity in June in Boulder?

In Boulder, Wyoming, the average relative humidity in June is 41%.

How much does it rain in Boulder in June?

In Boulder, Wyoming, in June, during 9.9 rainfall days, 0.91" (23mm) of precipitation is typically accumulated.

What is the last month it snows in Boulder?

June is the last month it regularly snows in Boulder, Wyoming. During 0.8 snowfall days, in June, Boulder aggregates 0.67" (17mm) of snow.

When are the longest days in Boulder?

With an average of 15h and 18min of daylight, June has the longest days of the year.

What is the average length of the day in June in Boulder?

The average day length in June in Boulder is 15h and 17min.

When are sunrise and sunset in June in Boulder?

On the first day of June, sunrise is at 5:42 am and sunset at 8:50 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 9:01 pm MDT.

How long on average sun shines in June in Boulder?

In June, the average sunshine duration in Boulder, Wyoming, is 11.8h.

What is the UV index reading in June in Boulder?

In Boulder, Wyoming, the average daily maximum UV index in June is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's 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
Boulder, WY

Average temperature in June - Boulder, WY
  • Average high temperature in June: 69.6°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (23.9°F).

  • Average low temperature in June: 47.5°F

The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).

Average pressure in June
Boulder, WY

Average pressure in June - Boulder, WY
  • Average pressure in June: 29.9"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in June
Boulder, WY

Average wind speed in June - Boulder, WY
  • Average wind speed in June: 8.1mph

The windiest month (with the highest average wind speed) is June (8.1mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).

Average humidity in June
Boulder, WY

Average humidity in June - Boulder, WY
  • Average humidity in June: 41%

The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (34%).

Average rainfall in June
Boulder, WY

Average rainfall in June - Boulder, WY
  • Average rainfall in June: 0.91"

The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is August (0.51").

Average rainfall days in June
Boulder, WY

Average rainfall days in June - Boulder, WY
  • Average rainfall days in June: 9.9 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.5 days).

Average snowfall in June
Boulder, WY

Average snowfall in June - Boulder, WY
  • Average snowfall in June: 0.67"

The month with the highest snowfall is February (7.32").
The months with the least snowfall are July and August (0").

Average snowfall days in June
Boulder, WY

Average snowfall days in June - Boulder, WY
  • Average snowfall days in June: 0.8 days

The month with the highest number of snowfall days is March (15.7 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in June /
Average sunshine in June
Boulder, WY

Average daylight in June / Average sunshine in June - Boulder, WY
  • Average daylight in June: 15h and 2min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in June: 11h and 5min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 18min).

Average sunshine days in June
Boulder, WY

Average sunshine days in June - Boulder, WY
  • Average sunshine days in June: 16.4 days

The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is May (9.7 days).

Average UV index in June
Boulder, WY

Average UV index in June - Boulder, WY
  • Average UV index in June: 5

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in June
Boulder, WY

Average cloud cover in June - Boulder, WY
  • Average cloud cover in June: 16

The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 11).

Average visibility in June
Boulder, WY

Average visibility in June - Boulder, WY
  • Average visibility in June: 6mi

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

Boulder, Wyoming, USA

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