April weather forecast and climate
Grantsdale, MT

April in Grantsdale, Montana, is a chilly spring month, with average temperature fluctuating between 25.9°F (-3.4°C) and 43.5°F (6.4°C).

Temperature

In Grantsdale, the average high-temperature marginally rises, from a cold 36°F (2.2°C) in March, to a frosty 43.5°F (6.4°C). In April, the average low-temperature is 25.9°F (-3.4°C).

Humidity

The average relative humidity in April is 79%.

Rainfall

Months with the most rainfall are February and April, with an average 2.36" (60mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Grantsdale, during April, snow falls for 10.3 days and regularly aggregates up to 5.67" (144mm) of snow. In Grantsdale, during the entire year, snow falls for 101.1 days, and aggregates up to 59.17" (1503mm) of snow.

Daylight

The average length of the day in Grantsdale is 13.6h.

Sunshine

In Grantsdale, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in Grantsdale is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in April interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Grantsdale?

In April, in Grantsdale, the average high-temperature is 43.5°F (6.4°C), and the average low-temperature is 25.9°F (-3.4°C).

What is the average humidity in April in Grantsdale?

The average relative humidity in April in Grantsdale, Montana, is 79%.

How much does it rain in Grantsdale in April?

In Grantsdale, Montana, during April, the rain falls for 18.5 days and regularly aggregates up to 2.36" (60mm) of precipitation.

What is the wettest month in Grantsdale?

The wettest months are February and April, with an average 2.36" (60mm) of rainfall.

How many days does it snow in April in Grantsdale?

In Grantsdale, during April, snow falls for 10.3 days and regularly aggregates up to 5.67" (144mm) of snow.

How many hours of daylight does Grantsdale have in April?

In Grantsdale, the average length of the day in April is 13.6h.

How many hours of sunshine does Grantsdale have in April?

In April, the average sunshine in Grantsdale is 8.9h.

What is the UV index reading in April in Grantsdale?

The average daily maximum UV index in April in Grantsdale is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in April - Grantsdale, MT
  • Average high temperature in April: 43.5°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).

  • Average low temperature in April: 25.9°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).

Average pressure in April - Grantsdale, MT
  • Average pressure in April: 30.01"

The month with the highest atmospheric pressure is January (30.21").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed in April - Grantsdale, MT
  • Average wind speed in April: 5mph

The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in April - Grantsdale, MT
  • Average humidity in April: 79%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).

Average rainfall in April - Grantsdale, MT
  • Average rainfall in April: 2.36"

The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").

Average rainfall days in April - Grantsdale, MT
  • Average rainfall days in April: 18.5 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).

Average snowfall in April - Grantsdale, MT
  • Average snowfall in April: 5.67"

The month with the highest snowfall is February (13.03").
Months with the least snowfall are June, July and August (0").

Average snowfall days in April - Grantsdale, MT
  • Average snowfall days in April: 10.3 days

The month with the highest number of snowfall days is February (19.3 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in April / Average sunshine in April - Grantsdale, MT
  • Average daylight in April: 13.6h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in April: 8.9h

Months with the most sunshine are July and August (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.4).

Average sunshine days in April - Grantsdale, MT
  • Average sunshine days in April: 6.9 days

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).

Average UV index in April - Grantsdale, MT
  • Average UV index in April: 2

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are February and December (UV index 1).

Average cloud cover in April - Grantsdale, MT
  • Average cloud cover in April: 43

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in April - Grantsdale, MT
  • Average visibility in April: 5mi

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