June weather forecast and climate
Roy, MT

June, the first month of the summer, in Roy, is an agreeable month, with average temperature ranging between max 68.5°F (20.3°C) and min 47.8°F (8.8°C).

Temperature

In Roy, the average high-temperature rises, from a mild 58.5°F (14.7°C) in May, to an agreeable 68.5°F (20.3°C). In Roy, in June, the average low-temperature is 47.8°F (8.8°C).

Humidity

In Roy, the average relative humidity is 62%.

Rainfall

In Roy, it is raining for 17 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, in Roy, there are 126.2 rainfall days, and 17.83" (453mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. June is the last month it regularly snows in Roy. During 0.2 snowfall days, Roy aggregates 0.04" (1mm) of snow. In Roy, during the entire year, snow falls for 83.4 days, and aggregates up to 45.51" (1156mm) of snow.

Daylight

The month with the longest days in Roy is June, with an average of 15.9h of daylight.

Sunshine

In Roy, Montana, the average sunshine in June is 11.1h.

UV index

In June, the average daily maximum UV index in Roy, Montana, is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in June in Roy?

In Roy, in June, the average high-temperature is 68.5°F (20.3°C), and the average low-temperature is 47.8°F (8.8°C).

What is the average humidity in June in Roy?

The average relative humidity in June is 62%.

How much does it rain in Roy in June?

In Roy, Montana, during June, the rain falls for 17 days and regularly aggregates up to 2.83" (72mm) of precipitation.

What is the last month it snows in Roy?

June is the last month it regularly snows in Roy. During 0.2 snowfall days, in June, Roy aggregates 0.04" (1mm) of snow.

When are the longest days in Roy?

With an average of 15.9h of daylight, June has the longest days of the year in Roy, Montana.

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

The average length of the day in June is 15.9h.

How many hours of sunshine does Roy have in June?

In June, the average sunshine in Roy is 11.1h.

How high is the UV index in June in Roy?

In June, the average daily maximum UV index in Roy is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.
Average temperature in June - Roy, MT
  • Average high temperature in June: 20.3°C

The warmest month (with the highest average high temperature) is July (26°C).
Months with the lowest average high temperature are February and December (-1.6°C).

  • Average low temperature in June: 8.8°C

The month with the highest average low temperature is August (12.5°C).
The coldest month (with the lowest average low temperature) is February (-9.3°C).

Average pressure in June - Roy, MT
  • Average pressure in June: 1010.9mbar

The month with the highest atmospheric pressure is January (1020.3mbar).
The month with the lowest atmospheric pressure is June (1010.9mbar).

Average wind speed in June - Roy, MT
  • Average wind speed in June: 13.7km/h

The windiest months (with the highest average wind speed) are January, April and October (15.9km/h).
The calmest month (with the lowest average wind speed) is August (11.9km/h).

Average humidity in June - Roy, MT
  • Average humidity in June: 62%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (47%).

Average rainfall in June - Roy, MT
  • Average rainfall in June: 72mm

The wettest month (with the highest rainfall) is May (86mm).
The driest month (with the least rainfall) is December (18mm).

Average rainfall days in June - Roy, MT
  • Average rainfall days in June: 17 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (5.4 days).

Average snowfall in June - Roy, MT
  • Average snowfall in June: 1mm

The month with the highest snowfall is April (232mm).
Months with the least snowfall are July and August (0mm).

Average snowfall days in June - Roy, MT
  • Average snowfall days in June: 0.2 days

The month with the highest number of snowfall days is February (15.2 days).
Months with the least snowfall days are July and August (0 days).

Average daylight in June / Average sunshine in June - Roy, MT
  • Average daylight in June: 15.9h

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.5h).

  • Average sunshine in June: 11.1h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5.5h).

Average sunshine days in June - Roy, MT
  • Average sunshine days in June: 9.9 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (8.3 days).

Average UV index in June - Roy, MT
  • Average UV index in June: 5

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

Average cloud cover in June - Roy, MT
  • Average cloud cover in June: 27

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).

Average visibility in June - Roy, MT
  • Average visibility in June: 10km

Months with the highest visibility are June, July, August and September (10km).
Months with the lowest visibility are January, February, March, April, May, October, November and December (9km).