March weather forecast
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

The first month of the spring, March, is a cold month in Helena, Montana, with an average temperature fluctuating between 39.7°F (4.3°C) and 23.2°F (-4.9°C).

Temperature

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

Humidity

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

Rainfall

In Helena, Montana, during March, the rain falls for 12.8 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Helena, during the entire year, the rain falls for 123.7 days and collects up to 12.4" (315mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In Helena, during 11.7 snowfall days, 5.12" (130mm) of snow is typically accumulated. In Helena, Montana, during the entire year, snow falls for 80.4 days and aggregates up to 34.88" (886mm) of snow.

Daylight

In Helena, the average length of the day in March is 11h and 57min.
On the first day of the month, sunrise is at 7:07 am and sunset at 6:13 pm MST. On the last day of March, sunrise is at 7:09 am and sunset at 7:55 pm MDT.
Note: On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time lasts until Sunday, November 5. 2023, at 2:00 am; consequently, the time zone reverts from MDT to MST.

Sunshine

The average sunshine in March is 7.8h.

UV index

In Helena, the average daily maximum UV index in March is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 in March interpret into the following advice:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 is 78%.

How many days does it rain in March in Helena?

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 Helena, in March, snow falls for 11.7 days, with typically accumulated 5.12" (130mm) of snow.

How many hours of daylight does Helena have in March?

In March, the average day length in Helena is 11h and 57min.

What time are sunrise and sunset in March in Helena?

In March, on the first day of the month, sunrise is at 7:07 am and sunset at 6:13 pm MST. On the last day of the month, in Helena, Montana, sunrise is at 7:09 am and sunset at 7:55 pm MDT.

When does Daylight Saving Time (DST) start in March in Helena?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Helena, Montana, and the time zone changes from MST to MDT. DST ends Sunday, November 5. 2023, at 2:00 am.

How many hours of sunshine does Helena have in March?

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

How high is the UV index in March in Helena?

The average daily maximum UV index in March is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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%).
The 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").
The 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).
The 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: 11h and 57min

The month with the longest days is June (Average daylight: 15h and 46min).
The month with the shortest days is December (Average daylight: 8h and 38min).

  • Average sunshine in March: 7h and 48min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).

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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).
The 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

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

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