April weather forecast
Big Sky, MT

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Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana
Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana

Weather in April

In Big Sky, April weather further emphasizes the transition into spring. Temperatures begin to climb more noticeably now, with highs fluctuating around 40.1°F (4.5°C). However, snow remains a consistent feature, lightly dusting the city before the melting begins in earnest. This month offers a harmonious blend of winter's remnants and spring's arrival, enhancing Big Sky's natural beauty. It is not uncommon for one to enjoy a snowy morning and a sunny afternoon within the same day in April.

Temperature

The start of April in Big Sky signals a slight increase in the average high-temperature, moving from an icy 32.9°F (0.5°C) in March to a still cold 40.1°F (4.5°C). Nighttime temperature experiences an average drop to a subzero cold 22.1°F (-5.5°C) in April.

Humidity

The average relative humidity in April is 83%.

Rainfall

The wettest months in Big Sky are April and May, with an average 2.91" (74mm) of rainfall.

Snowfall

Months with snowfall are January through December. The month with the most snowfall in Big Sky is April, when snow falls for 20.5 days and typically aggregates up to 19.88" (505mm) of snow.

Daylight

In Big Sky, the average length of the day in April is 13h and 33min.
On the first day of April in Big Sky, sunrise is at 7:03 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:30 pm MDT.

Sunshine

In April, the average sunshine in Big Sky is 7.9h.

UV index

The average daily maximum UV index in April in Big Sky is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: During April, 2 as the daily maximum UV index converts into the following advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Frequently asked questions

How cold is it in Big Sky in April?

April temperatures in Big Sky, Montana, vary between a high-temperature of 40.1°F (4.5°C) and a low-temperature of 22.1°F (-5.5°C).

What is the average humidity in April in Big Sky?

In Big Sky, the average relative humidity in April is 83%.

What is the rainiest month in Big Sky?

The wettest months in Big Sky, Montana, are April and May, with an average 2.91" (74mm) of rainfall.

How many days does it rain in April in Big Sky?

In Big Sky, in April, during 9.6 rainfall days, 2.91" (74mm) of precipitation is typically accumulated.

When does it snow the most in Big Sky?

The month with the most snowfall in Big Sky, Montana, is April, when snow falls for 20.5 days and typically aggregates up to 19.88" (505mm) of snow.

How much does it snow in Big Sky in April?

In Big Sky, Montana, in April, snow falls for 20.5 days, with typically accumulated 19.88" (505mm) of snow.

How many hours of daylight does Big Sky have in April?

In Big Sky, Montana, the average day length in April is 13h and 33min.

When are sunrise and sunset in April in Big Sky?

In April, on the first day of the month, sunrise is at 7:03 am and sunset at 7:53 pm. On the last day of the month, in Big Sky, sunrise is at 6:13 am and sunset at 8:30 pm MDT.

How many hours of sunshine does Big Sky have in April?

In April, the average sunshine duration in Big Sky, Montana, is 7.9h.

How high is the UV index in April in Big Sky?

In April, the average daily maximum UV index in Big Sky is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
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 April
Big Sky, MT

Average temperature in April - Big Sky, MT
  • Average high temperature in April: 40.1°F

The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is December (22.5°F).

  • Average low temperature in April: 22.1°F

The month with the highest average low temperature is August (45.1°F).
The coldest month (with the lowest average low temperature) is December (7.9°F).

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Average pressure in April
Big Sky, MT

Average pressure in April - Big Sky, MT
  • Average pressure in April: 29.97"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in April
Big Sky, MT

Average wind speed in April - Big Sky, MT
  • Average wind speed in April: 5.7mph

The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in April
Big Sky, MT

Average humidity in April - Big Sky, MT
  • Average humidity in April: 83%

The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is August (51%).

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Average rainfall in April
Big Sky, MT

Average rainfall in April - Big Sky, MT
  • Average rainfall in April: 2.91"

The wettest months (with the highest rainfall) are April and May (2.91").
The driest month (with the least rainfall) is July (1.18").

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Average rainfall days in April
Big Sky, MT

Average rainfall days in April - Big Sky, MT
  • Average rainfall days in April: 9.6 days

The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in April
Big Sky, MT

Average snowfall in April - Big Sky, MT
  • Average snowfall in April: 19.88"

The month with the highest snowfall is April (19.88").
The month with the least snowfall is August (0.08").

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Average snowfall days in April
Big Sky, MT

Average snowfall days in April - Big Sky, MT
  • Average snowfall days in April: 20.5 days

The month with the highest number of snowfall days is March (21 days).
The month with the least snowfall days is August (0.3 days).

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Average daylight in April /
Average sunshine in April
Big Sky, MT

Average daylight in April / Average sunshine in April - Big Sky, MT
  • Average daylight in April: 13h and 3min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in April: 7h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in April
Big Sky, MT

Average sunshine days in April - Big Sky, MT
  • Average sunshine days in April: 6.6 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is May (5.7 days).

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Average UV index in April
Big Sky, MT

Average UV index in April - Big Sky, MT
  • Average UV index in April: 2

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

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Average cloud cover in April
Big Sky, MT

Average cloud cover in April - Big Sky, MT
  • Average cloud cover in April: 50

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 17).

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Average visibility in April
Big Sky, MT

Average visibility in April - Big Sky, MT
  • Average visibility in April: 4mi

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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Big Sky, Montana, USA

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