April weather forecastBig Sky, MT
April
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
As March transitions into April, a subtle temperature shift is observed, with average highs adjusting from a wintry 32.9°F (0.5°C) to a still cold 40.1°F (4.5°C). April witnesses an average low-temperature hovering around a freezing cold 22.1°F (-5.5°C).Humidity
The average relative humidity in April is 83%.Rainfall
The months with the most rainfall are April and May, with an average 2.91" (74mm) of precipitation.Snowfall
January through December are months with snowfall. The month with the most snowfall is April, when snow falls for 20.5 days and typically aggregates up to 19.88" (505mm) of snow.Daylight
The average length of the day in April is 13h and 33min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:53 pm. On the last day of April, in Big Sky, sunrise is at 6:13 am and sunset at 8:30 pm MDT.
Sunshine
In April, the average sunshine is 7.9h.UV index
In April, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: In April, the maximum UV index of 2 suggests this advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in April /
Average sunshine in April
Big Sky, MT
- Average daylight in April: 13h and 30min
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 54min
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).
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).
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).
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).
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).
