April weather forecast
Mercer, IA

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Weather in April

April in Mercer, Iowa, is a moderate spring month, with an average temperature fluctuating between 60.1°F (15.6°C) and 42.4°F (5.8°C).

Temperature

April's onset brings a rise in the average high-temperature, moving from a frosty 48.6°F (9.2°C) in March to a moderate 60.1°F (15.6°C). Mercer experiences a consistent average temperature of 42.4°F (5.8°C) throughout the nights in April.

Humidity

In April, the average relative humidity is 72%.

Rainfall

In Mercer, in April, it is raining for 12.3 days, with typically 1.69" (43mm) of accumulated precipitation. In Mercer, Iowa, during the entire year, the rain falls for 115.1 days and collects up to 19.21" (488mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. April is the last month it regularly snows. During 0.9 snowfall days, in April, Mercer aggregates 1.02" (26mm) of snow. Throughout the year, there are 27.6 snowfall days, and 8.15" (207mm) of snow is accumulated.

Daylight

The average length of the day in April is 13h and 20min.
On the first day of April, sunrise is at 7:00 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 8:14 pm CDT.

Sunshine

In April, the average sunshine is 8.1h.

UV index

In Mercer, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum UV index of 4 in April translates into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in April?

The average high-temperature and low-temperature during April are 60.1°F (15.6°C) and 42.4°F (5.8°C) respectively.

What is the average humidity in April?

In Mercer, the average relative humidity in April is 72%.

How much does it rain in April?

In Mercer, during April, the rain falls for 12.3 days and regularly aggregates up to 1.69" (43mm) of precipitation.

What is the last month it snows?

April is the last month it regularly snows in Mercer, Iowa. During 0.9 snowfall days, in April, Mercer aggregates 1.02" (26mm) of snow.

How many hours of daylight does Mercer have in April?

In April, the average day length is 13h and 20min.

What time are sunrise and sunset in April?

In April, on the first day of the month, sunrise is at 7:00 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 8:14 pm CDT.

How many hours of sunshine does Mercer have in April?

In Mercer, the average sunshine duration in April is 8.1h.

How high is the UV index in April?

In April, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Mercer, IA

Average temperature in April - Mercer, IA
  • Average high temperature in April: 60.1°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (29.3°F).

  • Average low temperature in April: 42.4°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16°F).

Average pressure in April
Mercer, IA

Average pressure in April - Mercer, IA
  • Average pressure in April: 29.92"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in April
Mercer, IA

Average wind speed in April - Mercer, IA
  • Average wind speed in April: 10.5mph

The windiest months (with the highest average wind speed) are March and April (10.5mph).
The calmest month (with the lowest average wind speed) is July (7mph).

Average humidity in April
Mercer, IA

Average humidity in April - Mercer, IA
  • Average humidity in April: 72%

The months with the highest relative humidity are January and June (81%).
The month with the lowest relative humidity is October (70%).

Average rainfall in April
Mercer, IA

Average rainfall in April - Mercer, IA
  • Average rainfall in April: 1.69"

The wettest month (with the highest rainfall) is June (3.74").
The driest month (with the least rainfall) is February (0.51").

Average rainfall days in April
Mercer, IA

Average rainfall days in April - Mercer, IA
  • Average rainfall days in April: 12.3 days

The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (3 days).

Average snowfall in April
Mercer, IA

Average snowfall in April - Mercer, IA
  • Average snowfall in April: 1.02"

The month with the highest snowfall is January (2.28").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in April
Mercer, IA

Average snowfall days in April - Mercer, IA
  • Average snowfall days in April: 0.9 days

The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in April /
Average sunshine in April
Mercer, IA

Average daylight in April / Average sunshine in April - Mercer, 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 18min).

  • Average sunshine in April: 8h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in April
Mercer, IA

Average sunshine days in April - Mercer, IA
  • Average sunshine days in April: 15.2 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is May (12 days).

Average UV index in April
Mercer, IA

Average UV index in April - Mercer, 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
Mercer, IA

Average cloud cover in April - Mercer, IA
  • Average cloud cover in April: 44

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and September (Cloud cover 29).

Average visibility in April
Mercer, IA

Average visibility in April - Mercer, IA
  • 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).

Mercer, Iowa, USA

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