April weather forecast and climate
Westby, MT

Weather in April

April in Westby, Montana, is a fresh spring month, with average temperature fluctuating between 50.2°F (10.1°C) and 33.6°F (0.9°C).

Temperature

In April, the average high-temperature increases considerably, from a cold 35.4°F (1.9°C) in March, to a cool 50.2°F (10.1°C). The average low-temperature, in Westby, is 33.6°F (0.9°C).

Humidity

In April, the average relative humidity in Westby is 63%.

Rainfall

In Westby, it is raining for 9.9 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, there are 93.3 rainfall days, and 12.01" (305mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Westby, snow falls for 4.8 days, with typically accumulated 1.46" (37mm) of snow. In Westby, during the entire year, snow falls for 66.5 days, and aggregates up to 19.02" (483mm) of snow.

Daylight

The average length of the day in April is 13.8h.

Sunshine

The average sunshine in Westby, Montana, is 8.4h.

UV index

In Westby, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in April in Westby?

In Westby, in April, the average high-temperature is 50.2°F (10.1°C), and the average low-temperature is 33.6°F (0.9°C).

What is the average humidity in April in Westby?

In April, the average relative humidity in Westby, Montana, is 63%.

How much does it rain in Westby in April?

In Westby, Montana, in April, it is raining for 9.9 days, with typically 1.02" (26mm) of accumulated precipitation.

How much does it snow in Westby in April?

In Westby, during April, snow falls for 4.8 days and regularly aggregates up to 1.46" (37mm) of snow.

How many hours of daylight does Westby have in April?

In April, the average length of the day in Westby is 13.8h.

How many hours of sunshine does Westby have in April?

In April, the average sunshine in Westby is 8.4h.

How high is the UV index in April in Westby?

In Westby, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in April
Westby, MT

Average temperature in April - Westby, MT
  • Average high temperature in April: 50.2°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (19.8°F).

  • Average low temperature in April: 33.6°F

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (6.3°F).

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Average pressure in April
Westby, MT

Average pressure in April - Westby, MT
  • Average pressure in April: 29.95"

The month with the highest atmospheric pressure is February (30.17").
The month with the lowest atmospheric pressure is June (29.83").

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Average wind speed in April
Westby, MT

Average wind speed in April - Westby, MT
  • Average wind speed in April: 11.1mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).

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Average humidity in April
Westby, MT

Average humidity in April - Westby, MT
  • Average humidity in April: 63%

Months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in April
Westby, MT

Average rainfall in April - Westby, MT
  • Average rainfall in April: 1.02"

The wettest month (with the highest rainfall) is June (2.17").
The driest month (with the least rainfall) is February (0.47").

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Average rainfall days in April
Westby, MT

Average rainfall days in April - Westby, MT
  • Average rainfall days in April: 9.9 days

The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.6 days).

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Average snowfall in April
Westby, MT

Average snowfall in April - Westby, MT
  • Average snowfall in April: 1.46"

The month with the highest snowfall is November (3.74").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Westby, MT

Average snowfall days in April - Westby, MT
  • Average snowfall days in April: 4.8 days

The month with the highest number of snowfall days is February (13.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
Westby, MT

Average daylight in April / Average sunshine in April - Westby, MT
  • Average daylight in April: 13.8h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in April: 8.4h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is February (Average sunshine: 3.9h).

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Average sunshine days in April
Westby, MT

Average sunshine days in April - Westby, MT
  • Average sunshine days in April: 14 days

The month with the most sunshine days is August (20.1 days).
Months with the least sunshine days are February and June (13.8 days).

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Average UV index in April
Westby, MT

Average UV index in April - Westby, MT
  • Average UV index in April: 3

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in April
Westby, MT

Average cloud cover in April - Westby, MT
  • Average cloud cover in April: 45

The month with the most cloud cover is February (Cloud cover 60).
Months with the least cloud cover are July and August (Cloud cover 19).

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Average visibility in April
Westby, MT

Average visibility in April - Westby, MT
  • Average visibility in April: 6mi

Months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February, March and December (5mi).

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