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
A shift in the average high-temperature is noticeable in April, changing from a frosty 45.5°F (7.5°C) in March to a cool 55.2°F (12.9°C). During April, the nighttime temperature averages of 37.6°F (3.1°C).Humidity
In Custer, the average relative humidity in April is 58%.Rainfall
In Custer, in April, it is raining for 13.7 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, there are 107 rainfall days, and 12.17" (309mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In Custer, during April, snow falls for 3.8 days and regularly aggregates up to 2.4" (61mm) of snow. In Custer, during the entire year, snow falls for 48.3 days and aggregates up to 17.68" (449mm) of snow.Daylight
In April, the average length of the day is 13h and 35min.On the first day of April, sunrise is at 6:48 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:17 pm MDT.
Sunshine
In April, the average sunshine is 9.1h.UV index
The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In April, the maximum UV index of 3 transforms into these recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the average humidity in April?
How much does it rain in April?
How many days does it snow in April?
How many hours of daylight does Custer have in April?
When is the sunrise / sunset in April in Custer?
How many hours of sunshine does Custer have in April?
What is the UV index reading in April?
Average temperature in April
Custer, MT
- Average high temperature in April: 55.2°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The months with the lowest average high temperature are January and December (31.1°F).
- Average low temperature in April: 37.6°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in April
Custer, MT
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in April
Custer, MT
- Average wind speed in April: 10.2mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).
Average humidity in April
Custer, MT
- Average humidity in April: 58%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall in April
Custer, MT
- Average rainfall in April: 1.5"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days in April
Custer, MT
- Average rainfall days in April: 13.7 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is December (4.5 days).
Average snowfall in April
Custer, MT
- Average snowfall in April: 2.4"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are June, July and August (0").
Average snowfall days in April
Custer, MT
- Average snowfall days in April: 3.8 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Custer, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in April
Custer, MT
- Average sunshine days in April: 13.5 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is April (13.5 days).
Average UV index in April
Custer, MT
- Average UV index in April: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Custer, MT
- Average cloud cover in April: 41
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in April
Custer, MT
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Custer, Montana, USA
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