Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
April marks a minor ascent in the average high-temperature in Helena, adjusting from March's wintry 39.7°F (4.3°C) to a chilly 47.8°F (8.8°C). During the month of April, Helena experiences a steady low-temperature average of 28.8°F (-1.8°C).Humidity
The average relative humidity in April is 69%.Rainfall
In Helena, during April, the rain falls for 15.1 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 123.7 rainfall days, and 12.4" (315mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Helena. In Helena, Montana, in April, snow falls for 8.8 days, with typically accumulated 5.12" (130mm) of snow. In Helena, during the entire year, snow falls for 80.4 days and aggregates up to 34.88" (886mm) of snow.Daylight
In Helena, Montana, the average length of the day in April is 13h and 37min.On the first day of April, sunrise is at 7:05 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:36 pm MDT.
Sunshine
In April, the average sunshine in Helena is 9.1h.UV index
In April, the average daily maximum UV index in Helena is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 2 in April translates into this advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Around midday, solar radiation is most harmful; hence, exposure should be limited. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Helena?
What is the average humidity in April in Helena?
How much does it rain in Helena in April?
How many days does it snow in April in Helena?
What is the average length of the day in April in Helena?
When is the sunrise / sunset in April in Helena?
How long on average sun shines in April in Helena?
What is the UV index reading in April in Helena?
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).
Average pressure in April
Helena, MT
- Average pressure in April: 29.97"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).
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).
Average humidity in April
Helena, MT
- Average humidity in April: 69%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (46%).
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").
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).
Average snowfall in April
Helena, MT
- Average snowfall in April: 5.12"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July and August (0").
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).
The months with the least snowfall days are July and August (0 days).
Average daylight in April /
Average sunshine in April
Helena, MT
- Average daylight in April: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in April: 9h and 1min
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).
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).
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).
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).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in April
Helena, MT
- Average visibility in April: 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).
Helena, Montana, USA
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