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's arrival coincides with a marginal rise in the average high-temperature, moving from March's icy 38.7°F (3.7°C) to a chilly 46.4°F (8°C). In April, Boulder reports a consistent average low-temperature of 27°F (-2.8°C) during the nights.Humidity
In Boulder, the average relative humidity in April is 72%.Rainfall
In Boulder, in April, it is raining for 14.8 days, with typically 2.01" (51mm) of accumulated precipitation. Throughout the year, in Boulder, there are 133.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In Boulder, in April, snow falls for 12.3 days, with typically accumulated 7.8" (198mm) of snow. In Boulder, during the entire year, snow falls for 105.8 days and aggregates up to 55.12" (1400mm) of snow.Daylight
In April, the average length of the day is 13h and 36min.On the first day of April in Boulder, sunrise is at 7:06 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 8:36 pm MDT.
Sunshine
In Boulder, the average sunshine in April is 9.1h.UV index
In Boulder, Montana, the average daily maximum UV index in April is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during April leads to these advisories:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature in Boulder?
What is the average humidity in April in Boulder?
How much does it rain in Boulder in April?
How many days does it snow in April in Boulder?
How many hours of daylight does Boulder have in April?
What time are sunrise and sunset in April in Boulder?
How long on average sun shines in April in Boulder?
What is the UV index intensity in April in Boulder?
Average temperature in April
Boulder, MT
- Average high temperature in April: 46.4°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (27°F).
- Average low temperature in April: 27°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure in April
Boulder, MT
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Boulder, MT
- Average wind speed in April: 6.4mph
The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in April
Boulder, MT
- Average humidity in April: 72%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).
Average rainfall in April
Boulder, MT
- Average rainfall in April: 2.01"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").
Average rainfall days in April
Boulder, MT
- Average rainfall days in April: 14.8 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in April
Boulder, MT
- Average snowfall in April: 7.8"
The month with the highest snowfall is February (9.72").
The months with the least snowfall are July and August (0").
Average snowfall days in April
Boulder, MT
- Average snowfall days in April: 12.3 days
The month with the highest number of snowfall days is February (18 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in April /
Average sunshine in April
Boulder, MT
- Average daylight in April: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in April: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in April
Boulder, MT
- Average sunshine days in April: 8.9 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in April
Boulder, 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
Boulder, MT
- Average cloud cover in April: 42
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in April
Boulder, MT
- Average visibility in April: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Boulder, Montana, USA
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