April weather forecast
Yellowstone National Park, WY

The natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background
The natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background

Weather in April

April in Yellowstone National Park, Wyoming, is a frosty spring month, with an average temperature fluctuating between 43.3°F (6.3°C) and 18°F (-7.8°C).

Temperature

In April, the average high-temperature marginally rises from a cold 36.1°F (2.3°C) in March to a chilly 43.3°F (6.3°C). In April, in Yellowstone National Park, the average low-temperature is 18°F (-7.8°C).

Rainfall

In April, in Yellowstone National Park, the rain falls for 11.6 days. Throughout April, 1.78" (45.2mm) of precipitation is accumulated. In Yellowstone National Park, during the entire year, the rain falls for 151 days and collects up to 20.9" (530.8mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In April, in Yellowstone National Park, it is snowing for 9.5 days. Throughout April, 21.4" (543.6mm) of snow is accumulated. In Yellowstone National Park, during the entire year, snow falls for 91.4 days and aggregates up to 193.7" (4920mm) of snow.

Daylight

In April, the average length of the day in Yellowstone National Park is 13h and 30min.
On the first day of April in Yellowstone National Park, sunrise is at 7:02 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:25 pm MDT.

Sunshine

In Yellowstone National Park, the average sunshine in April is 8h.

UV index

In Yellowstone National Park, Wyoming, the average daily maximum UV index in April is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In April, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

How much does it rain in Yellowstone National Park in April?

In Yellowstone National Park, in April, during 11.6 rainfall days, 1.78" (45.2mm) of precipitation is typically accumulated.

How many days does it snow in April in Yellowstone National Park?

In Yellowstone National Park, Wyoming, in April, during 9.5 snowfall days, 21.4" (543.6mm) of snow is typically accumulated.

How many hours of daylight does Yellowstone National Park have in April?

In Yellowstone National Park, Wyoming, the average day length in April is 13h and 30min.

When is the sunrise / sunset in April in Yellowstone National Park?

In April, on the first day of the month, sunrise is at 7:02 am and sunset at 7:49 pm. On the last day of the month, in Yellowstone National Park, sunrise is at 6:13 am and sunset at 8:25 pm MDT.

How many hours of sunshine does Yellowstone National Park have in April?

In Yellowstone National Park, Wyoming, the average sunshine duration in April is 8h.

What is the UV index reading in April in Yellowstone National Park?

The average daily maximum UV index in April in Yellowstone National Park, Wyoming, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.
Average rainfall days
Average snowfall days
Average sunshine
Average UV index

Average temperature in April
Yellowstone National Park, WY

Average temperature in April - Yellowstone National Park, WY
  • Average high temperature in April: 43.3°F

The warmest month (with the highest average high temperature) is July (71.6°F).
The month with the lowest average high temperature is December (24.3°F).

  • Average low temperature in April: 18°F

The month with the highest average low temperature is July (41.6°F).
The coldest months (with the lowest average low temperature) are January and February (1.2°F).

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Average rainfall in April
Yellowstone National Park, WY

Average rainfall in April - Yellowstone National Park, WY
  • Average rainfall in April: 1.8"

The wettest month (with the highest rainfall) is May (2.5").
The driest month (with the least rainfall) is October (1.2").

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Average rainfall days in April
Yellowstone National Park, WY

Average rainfall days in April - Yellowstone National Park, WY
  • Average rainfall days in April: 11.6 days

The month with the highest number of rainy days is January (16.8 days).
The month with the least rainy days is October (8.8 days).

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Average snowfall in April
Yellowstone National Park, WY

Average snowfall in April - Yellowstone National Park, WY
  • Average snowfall in April: 21.4"

The month with the highest snowfall is January (34.3").
The months with the least snowfall are July and August (0").

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Average snowfall days in April
Yellowstone National Park, WY

Average snowfall days in April - Yellowstone National Park, WY
  • Average snowfall days in April: 9.5 days

The month with the highest number of snowfall days is January (16.2 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in April /
Average sunshine in April
Yellowstone National Park, WY

Average daylight in April / Average sunshine in April - Yellowstone National Park, WY
  • Average daylight in April: 13h and 30min

The month with the longest days is June (Average daylight: 15h and 29min).
The month with the shortest days is December (Average daylight: 8h and 55min).

  • Average sunshine in April: 8h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 4h).

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Average UV index in April
Yellowstone National Park, WY

Average UV index in April - Yellowstone National Park, WY
  • Average UV index in April: 6

The month with the highest UV index is July (UV index 10).
The months with the lowest UV index are January and December (UV index 1).

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