April weather forecast and climate
Helena, MT

The State Capital building of Montana in Helena city, set on a beautiful natural park
The State Capital building of Montana in Helena city, set on a beautiful natural park

Weather in April

April in Helena, Montana, is a chilly spring month, with average temperature varying between 47.8°F (8.8°C) and 28.8°F (-1.8°C).

Temperature

In Helena, Montana, the average high-temperature in April marginally rises, from a wintry 39.7°F (4.3°C) in March, to a frosty 47.8°F (8.8°C). In April, in Helena, the average low-temperature is 28.8°F (-1.8°C).

Humidity

In April, the average relative humidity in Helena is 69%.

Rainfall

In Helena, Montana, during 15.1 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Helena, during the entire year, the rain falls for 123.7 days and collects up to 12.4" (315mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Helena, Montana, in April, snow falls for 8.8 days, with typically accumulated 5.12" (130mm) of snow. Throughout the year, there are 80.4 snowfall days, and 34.88" (886mm) of snow is accumulated.

Daylight

The average length of the day in Helena is 13.6h.

Sunshine

In Helena, the average sunshine is 9.1h.

UV index

The average daily maximum UV index in Helena, Montana, is 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in April transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in April in Helena?

In April, the average high-temperature is 47.8°F (8.8°C), and the average low-temperature is 28.8°F (-1.8°C).

What is the average humidity in April in Helena?

The average relative humidity in April is 69%.

How many days does it rain in April in Helena?

In Helena, in April, during 15.1 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

How many days does it snow in April in Helena?

In April, in Helena, Montana, it is snowing for 8.8 days. Throughout April, 5.12" (130mm) of snow is accumulated.

What is the average length of the day in April in Helena?

In Helena, Montana, the average length of the day in April is 13.6h.

How long on average sun shines in April in Helena?

In Helena, Montana, the average sunshine in April is 9.1h.

How high is the UV index in April in Helena?

In April, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to the UV radiation.

Average temperature in April
Helena, MT

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

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (27.7°F).

  • Average low temperature in April: 28.8°F

The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is December (14.2°F).

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Average pressure in April
Helena, MT

Average pressure in April - Helena, MT
  • Average pressure in April: 29.97"

The month with the highest atmospheric pressure is January (30.18").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in April
Helena, MT

Average wind speed in April - Helena, MT
  • Average wind speed in April: 6.9mph

The windiest month (with the highest average wind speed) is November (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in April
Helena, MT

Average humidity in April - Helena, MT
  • Average humidity in April: 69%

The month with the highest relative humidity is January (85%).
Months with the lowest relative humidity are July and August (46%).

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Average rainfall in April
Helena, MT

Average rainfall in April - Helena, MT
  • Average rainfall in April: 1.5"

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.63").

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Average rainfall days in April
Helena, MT

Average rainfall days in April - Helena, MT
  • Average rainfall days in April: 15.1 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is November (7 days).

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Average snowfall in April
Helena, MT

Average snowfall in April - Helena, MT
  • Average snowfall in April: 5.12"

The month with the highest snowfall is February (6.18").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in April
Helena, MT

Average snowfall days in April - Helena, MT
  • Average snowfall days in April: 8.8 days

The month with the highest number of snowfall days is February (16.2 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
Helena, MT

Average daylight in April / Average sunshine in April - Helena, MT
  • Average daylight in April: 13.6h

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: 9.1h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 5.6h).

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Average sunshine days in April
Helena, MT

Average sunshine days in April - Helena, MT
  • Average sunshine days in April: 9.8 days

The month with the most sunshine days is July (20.5 days).
The month with the least sunshine days is April (9.8 days).

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Average UV index in April
Helena, MT

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

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
Helena, MT

Average cloud cover in April - Helena, MT
  • Average cloud cover in April: 40

The month with the most cloud cover is February (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 15).

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Average visibility in April
Helena, MT

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

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

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