April weather forecast and climate
Lewistown, MT

Weather in April

April in Lewistown, Montana, is a chilly spring month, with average temperature fluctuating between 47.8°F (8.8°C) and 31.8°F (-0.1°C).

Temperature

In Lewistown, the average high-temperature in April slightly increases, from a cold 40.6°F (4.8°C) in March, to a chilly 47.8°F (8.8°C). In April, in Lewistown, Montana, the average low-temperature is 31.8°F (-0.1°C).

Humidity

In April, the average relative humidity in Lewistown, Montana, is 68%.

Rainfall

In Lewistown, in April, it is raining for 14.8 days, with typically 2.36" (60mm) of accumulated precipitation. In Lewistown, Montana, during the entire year, the rain falls for 126.2 days and collects up to 17.83" (453mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Lewistown. April is the month with the most snowfall. Snow falls for 10 days and accumulates 9.13" (232mm) of snow.

Daylight

The average length of the day in April is 13.7h.

Sunshine

The average sunshine in April is 9h.

UV index

Months with the lowest UV index in Lewistown are January through April, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from 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. 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 average humidity in April in Lewistown?

In Lewistown, Montana, the average relative humidity in April is 68%.

How many days does it rain in April in Lewistown?

In Lewistown, Montana, during April, the rain falls for 14.8 days and regularly aggregates up to 2.36" (60mm) of precipitation.

What is the snowiest month in Lewistown?

April is the month with the most snowfall in Lewistown. Snow falls for 10 days and accumulates 9.13" (232mm) of snow.

How much does it snow in Lewistown in April?

In April, in Lewistown, Montana, it is snowing for 10 days. Throughout April, 9.13" (232mm) of snow is accumulated.

How many hours of daylight does Lewistown have in April?

In Lewistown, Montana, the average length of the day in April is 13.7h.

How many hours of sunshine does Lewistown have in April?

In April, the average sunshine in Lewistown is 9h.

When is the lowest UV index in Lewistown?

Months with the lowest UV index in Lewistown, Montana, are January through April, October through December, with an average maximum UV index of 2.

What is the UV index reading in April in Lewistown?

In April, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV rays.

Average temperature in April
Lewistown, MT

Average temperature in April - Lewistown, MT
  • Average high temperature in April: 47.8°F

The warmest month (with the highest average high temperature) is July (78.8°F).
Months with the lowest average high temperature are February and December (29.1°F).

  • Average low temperature in April: 31.8°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).

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Average pressure in April
Lewistown, MT

Average pressure in April - Lewistown, MT
  • Average pressure in April: 29.93"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in April
Lewistown, MT

Average wind speed in April - Lewistown, MT
  • Average wind speed in April: 9.9mph

The windiest months (with the highest average wind speed) are January, April and October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

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Average humidity in April
Lewistown, MT

Average humidity in April - Lewistown, MT
  • Average humidity in April: 68%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in April
Lewistown, MT

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

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in April
Lewistown, MT

Average rainfall days in April - Lewistown, MT
  • Average rainfall days in April: 14.8 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in April
Lewistown, MT

Average snowfall in April - Lewistown, MT
  • Average snowfall in April: 9.13"

The month with the highest snowfall is April (9.13").
Months with the least snowfall are July and August (0").

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Average snowfall days in April
Lewistown, MT

Average snowfall days in April - Lewistown, MT
  • Average snowfall days in April: 10 days

The month with the highest number of snowfall days is February (15.2 days).
Months with the least snowfall days are July and August (0 days).

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

Average daylight in April / Average sunshine in April - Lewistown, MT
  • Average daylight in April: 13.7h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in April: 9h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5.5h).

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Average sunshine days in April
Lewistown, MT

Average sunshine days in April - Lewistown, MT
  • Average sunshine days in April: 8.3 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (8.3 days).

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Average UV index in April
Lewistown, MT

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

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in April
Lewistown, MT

Average cloud cover in April - Lewistown, MT
  • Average cloud cover in April: 42

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in April
Lewistown, MT

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

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

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