March weather forecast and climate
Roy, MT

The first month of the spring, March, is a wintry month in Roy, Montana, with average temperature ranging between min 25.3°F (-3.7°C) and max 40.6°F (4.8°C).

Temperature

In March, the average high-temperature increases, from a subzero cold 29.1°F (-1.6°C) in February, to a cold 40.6°F (4.8°C). In Roy, in March, the average low-temperature is 25.3°F (-3.7°C).

Humidity

In Roy, the average relative humidity is 74%.

Rainfall

In Roy, in March, it is raining for 10.4 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, in Roy, there are 126.2 rainfall days, and 17.83" (453mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Roy are January through June, September through December. In March, it is snowing for 12.7 days. Throughout March, 5.63" (143mm) of snow is accumulated. Throughout the year, there are 83.4 snowfall days, and 45.51" (1156mm) of snow is accumulated.

Daylight

In Roy, the average length of the day is 12h.

Sunshine

The average sunshine in Roy is 7.6h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Roy. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 March in Roy?

In Roy, Montana, in March, the average high-temperature is 40.6°F (4.8°C), and the average low-temperature is 25.3°F (-3.7°C).

What is the average humidity in March in Roy?

In March, the average relative humidity in Roy is 74%.

How much does it rain in Roy in March?

In Roy, Montana, during March, the rain falls for 10.4 days and regularly aggregates up to 1.14" (29mm) of precipitation.

How many days does it snow in March in Roy?

In Roy, Montana, in March, during 12.7 snowfall days, 5.63" (143mm) of snow is typically accumulated.

How many hours of daylight does Roy have in March?

In March, the average length of the day is 12h.

How many hours of sunshine does Roy have in March?

In March, the average sunshine in Roy is 7.6h.

What is the month with the lowest UV index in Roy?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Roy.

What is the UV index reading in March in Roy?

In Roy, the average daily maximum UV index in March is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in March - Roy, MT
  • Average high temperature in March: 4.8°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 March: -3.7°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 March - Roy, MT
  • Average pressure in March: 1016.1mbar

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 March - Roy, MT
  • Average wind speed in March: 14.8km/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 March - Roy, MT
  • Average humidity in March: 74%

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

Average rainfall in March - Roy, MT
  • Average rainfall in March: 29mm

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

Average rainfall days in March - Roy, MT
  • Average rainfall days in March: 10.4 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 March - Roy, MT
  • Average snowfall in March: 143mm

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

Average snowfall days in March - Roy, MT
  • Average snowfall days in March: 12.7 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 March / Average sunshine in March - Roy, MT
  • Average daylight in March: 12h

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 March: 7.6h

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 March - Roy, MT
  • Average sunshine days in March: 10.5 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 March - Roy, MT
  • Average UV index in March: 2

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 March - Roy, MT
  • Average cloud cover in March: 41

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 March - Roy, MT
  • Average visibility in March: 9km

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).