March 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 March

March, the first month of the spring, in Helena, is a wintry month, with temperature in the range of an average low of 23.2°F (-4.9°C) and an average high of 39.7°F (4.3°C).

Temperature

In Helena, the average high-temperature in March increases, from a subzero cold 29.7°F (-1.3°C) in February, to a wintry 39.7°F (4.3°C). In March, the average low-temperature is 23.2°F (-4.9°C).

Humidity

In March, the average relative humidity is 78%.

Rainfall

In Helena, during March, the rain falls for 12.8 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, there are 123.7 rainfall days, and 12.4" (315mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Helena, Montana, are January through May, September through December. In Helena, during 11.7 snowfall days, 5.12" (130mm) of snow is typically accumulated. Throughout the year, there are 80.4 snowfall days, and 34.88" (886mm) of snow is accumulated.

Daylight

In Helena, the average length of the day is 12h.

Sunshine

In Helena, the average sunshine in March is 7.8h.

UV index

The average daily maximum UV index in Helena, Montana, is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation for the average person.
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 temperature in March in Helena?

In Helena, in March, the average high-temperature is 39.7°F (4.3°C), and the average low-temperature is 23.2°F (-4.9°C).

What is the average humidity in March in Helena?

The average relative humidity in March in Helena is 78%.

How much does it rain in Helena in March?

In Helena, Montana, in March, during 12.8 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

How much does it snow in Helena in March?

In March, it is snowing for 11.7 days. Throughout March, 5.12" (130mm) of snow is accumulated.

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

In March, the average length of the day in Helena is 12h.

How long on average sun shines in March in Helena?

In March, the average sunshine is 7.8h.

What is the UV index reading in March in Helena?

In March, the average daily maximum UV index in Helena is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in March
Helena, MT

Average temperature in March - Helena, MT
  • Average high temperature in March: 39.7°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 March: 23.2°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 March
Helena, MT

Average pressure in March - Helena, MT
  • Average pressure in March: 30.03"

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 March
Helena, MT

Average wind speed in March - Helena, MT
  • Average wind speed in March: 6.6mph

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 March
Helena, MT

Average humidity in March - Helena, MT
  • Average humidity in March: 78%

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 March
Helena, MT

Average rainfall in March - Helena, MT
  • Average rainfall in March: 1.1"

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 March
Helena, MT

Average rainfall days in March - Helena, MT
  • Average rainfall days in March: 12.8 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 March
Helena, MT

Average snowfall in March - Helena, MT
  • Average snowfall in March: 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 March
Helena, MT

Average snowfall days in March - Helena, MT
  • Average snowfall days in March: 11.7 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 March /
Average sunshine in March
Helena, MT

Average daylight in March / Average sunshine in March - Helena, MT
  • Average daylight in March: 12h

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 March: 7.8h

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 March
Helena, MT

Average sunshine days in March - Helena, MT
  • Average sunshine days in March: 11 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 March
Helena, MT

Average UV index in March - Helena, MT
  • Average UV index in March: 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 March
Helena, MT

Average cloud cover in March - Helena, MT
  • Average cloud cover in March: 42

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 March
Helena, MT

Average visibility in March - Helena, MT
  • Average visibility in March: 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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