April weather forecastHeron, MT
April
Weather in April
April in Heron, Montana, is a frosty spring month, with an average temperature varying between 48.7°F (9.3°C) and 30.6°F (-0.8°C).Temperature
An escalation in the average high-temperature is seen with the onset of April, moving from an icy 39.2°F (4°C) in March to a chilly 48.7°F (9.3°C). Throughout April, Heron anticipates an average low-temperature of 30.6°F (-0.8°C).Humidity
The average relative humidity in April is 78%.Rainfall
In Heron, in April, during 19.3 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. In Heron, during the entire year, the rain falls for 161.9 days and collects up to 27.48" (698mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Heron, in April, snow falls for 5.2 days, with typically accumulated 1.97" (50mm) of snow. Throughout the year, there are 80.8 snowfall days, and 60" (1524mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 42min.On the first day of the month, sunrise is at 7:20 am and sunset at 8:14 pm. On the last day of April, in Heron, sunrise is at 6:25 am and sunset at 8:56 pm MDT.
Sunshine
In Heron, the average sunshine in April is 8.1h.UV index
In April, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 2 in April, converts into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Heron, MT
- Average high temperature in April: 48.7°F
The warmest month (with the highest average high temperature) is August (78.3°F).
The month with the lowest average high temperature is December (29.3°F).
- Average low temperature in April: 30.6°F
The month with the highest average low temperature is August (49.1°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).
Average pressure in April
Heron, MT
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in April
Heron, MT
- Average wind speed in April: 4.5mph
The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in April
Heron, MT
- Average humidity in April: 78%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (52%).
Average rainfall in April
Heron, MT
- Average rainfall in April: 2.52"
The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is August (0.55").
Average rainfall days in April
Heron, MT
- Average rainfall days in April: 19.3 days
The month with the highest number of rainy days is April (19.3 days).
The month with the least rainy days is August (6.9 days).
Average snowfall in April
Heron, MT
- Average snowfall in April: 1.97"
The month with the highest snowfall is January (15.87").
The months with the least snowfall are June, July and August (0").
Average snowfall days in April
Heron, MT
- Average snowfall days in April: 5.2 days
The month with the highest number of snowfall days is December (19.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Heron, MT
- Average daylight in April: 13h and 42min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in April: 8h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in April
Heron, MT
- Average sunshine days in April: 7.6 days
The month with the most sunshine days is July (20.9 days).
The month with the least sunshine days is March (7.1 days).
Average UV index in April
Heron, MT
- Average UV index in April: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in April
Heron, MT
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in April
Heron, MT
- Average visibility in April: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).
