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 brings a temperature increase, with average high-temperatures moving from March's frosty 46.8°F (8.2°C) to a mild 59.5°F (15.3°C). Altoona, in April, observes a steady average low-temperature of 42.4°F (5.8°C).Humidity
In April, the average relative humidity in Altoona is 72%.Rainfall
In Altoona, in April, it is raining for 9.2 days, with typically 0.47" (12mm) of accumulated precipitation. In Altoona, Iowa, during the entire year, the rain falls for 79 days and collects up to 5.94" (151mm) of precipitation.Snowfall
Months with snowfall in Altoona are January through April, October through December. April is the last month it regularly snows in Altoona, Iowa. During 0.8 snowfall days, in April, Altoona aggregates 0.12" (3mm) of snow. In Altoona, during the entire year, snow falls for 22 days and aggregates up to 2.44" (62mm) of snow.Daylight
The average length of the day in April is 13h and 22min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:39 pm. On the last day of April, in Altoona, sunrise is at 6:10 am and sunset at 8:11 pm CDT.
Sunshine
In April, the average sunshine in Altoona, Iowa, is 8h.UV index
In Altoona, the average daily maximum UV index in April is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 4 in April leads to these guidelines:
Take precautions - Protection against skin and eye damage is obliged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
What is the average April temperature in Altoona?
What is the average humidity in April in Altoona?
How many days does it rain in April in Altoona?
What is the last month it snows in Altoona?
What is the average length of the day in April in Altoona?
When is the sunrise / sunset in April in Altoona?
How long on average sun shines in April in Altoona?
What is the UV index intensity in April in Altoona?
Average temperature in April
Altoona, IA
- Average high temperature in April: 59.5°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in April
Altoona, IA
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in April
Altoona, IA
- Average wind speed in April: 10.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in April
Altoona, IA
- Average humidity in April: 72%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in April
Altoona, IA
- Average rainfall in April: 0.47"
The wettest month (with the highest rainfall) is May (0.98").
The driest months (with the least rainfall) are January, February and December (0.24").
Average rainfall days in April
Altoona, IA
- Average rainfall days in April: 9.2 days
The month with the highest number of rainy days is May (11.6 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in April
Altoona, IA
- Average snowfall in April: 0.12"
The month with the highest snowfall is January (0.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Altoona, IA
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Altoona, IA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in April
Altoona, IA
- Average sunshine days in April: 18.8 days
The month with the most sunshine days is December (25.5 days).
The month with the least sunshine days is June (15.5 days).
Average UV index in April
Altoona, IA
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Altoona, IA
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility in April
Altoona, IA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Altoona, Iowa, USA
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