April weather forecast
Williamstown, MO

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Weather in April

April in Williamstown, Missouri, is a comfortable spring month, with an average temperature fluctuating between 44.2°F (6.8°C) and 61.9°F (16.6°C).

Temperature

In April, the meteorological conditions change with the average high-temperature moving from a chilly 49.6°F (9.8°C) in March to a refreshing 61.9°F (16.6°C). Throughout the month of April, Williamstown witnesses an average temperature of 44.2°F (6.8°C).

Humidity

The average relative humidity in April in Williamstown is 75%.

Rainfall

In April, in Williamstown, the rain falls for 14.8 days. Throughout April, 3.15" (80mm) of precipitation is accumulated. In Williamstown, during the entire year, the rain falls for 134.4 days and collects up to 27.44" (697mm) of precipitation.

Snowfall

Months with snowfall in Williamstown are January through April, October through December. April is the last month it regularly snows. During 0.5 snowfall days, in April, Williamstown aggregates 0.67" (17mm) of snow. In Williamstown, during the entire year, snow falls for 24.7 days and aggregates up to 11.69" (297mm) of snow.

Daylight

The average length of the day in April in Williamstown is 13h and 19min.
On the first day of April, sunrise is at 6:49 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 8:01 pm CDT.

Sunshine

In Williamstown, the average sunshine in April is 8.2h.

UV index

The average daily maximum UV index in April in Williamstown is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in April interprets into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Enhance your sun protection with tightly woven, yet airy clothing. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
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Frequently asked questions

What are the temperatures in Williamstown in April?

In Williamstown, in April, the average high-temperature is 61.9°F (16.6°C), and the average low-temperature is 44.2°F (6.8°C).

What is the average humidity in April in Williamstown?

The average relative humidity in April is 75%.

How many days does it rain in April in Williamstown?

In Williamstown, in April, during 14.8 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.

What is the last month it snows in Williamstown?

April is the last month it regularly snows. During 0.5 snowfall days, in April, Williamstown aggregates 0.67" (17mm) of snow.

What is the average length of the day in April in Williamstown?

The average day length in April in Williamstown is 13h and 19min.

When is the sunrise / sunset in April in Williamstown?

In April, on the first day of the month, sunrise is at 6:49 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 8:01 pm CDT.

How many hours of sunshine does Williamstown have in April?

The average sunshine duration in April in Williamstown, Missouri, is 8.2h.

What is the UV index intensity in April in Williamstown?

The average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's 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
Williamstown, MO

Average temperature in April - Williamstown, MO
  • Average high temperature in April: 61.9°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 (31.6°F).

  • Average low temperature in April: 44.2°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in April
Williamstown, MO

Average pressure in April - Williamstown, MO
  • Average pressure in April: 29.93"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in April
Williamstown, MO

Average wind speed in April - Williamstown, MO
  • Average wind speed in April: 10.3mph

The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

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Average humidity in April
Williamstown, MO

Average humidity in April - Williamstown, MO
  • Average humidity in April: 75%

The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in April
Williamstown, MO

Average rainfall in April - Williamstown, MO
  • Average rainfall in April: 3.15"

The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is January (1.22").

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Average rainfall days in April
Williamstown, MO

Average rainfall days in April - Williamstown, MO
  • Average rainfall days in April: 14.8 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (4.7 days).

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Average snowfall in April
Williamstown, MO

Average snowfall in April - Williamstown, MO
  • Average snowfall in April: 0.67"

The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in April
Williamstown, MO

Average snowfall days in April - Williamstown, MO
  • Average snowfall days in April: 0.5 days

The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
Williamstown, MO

Average daylight in April / Average sunshine in April - Williamstown, MO
  • Average daylight in April: 13h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in April: 8h and 1min

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 18min).

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Average sunshine days in April
Williamstown, MO

Average sunshine days in April - Williamstown, MO
  • Average sunshine days in April: 13.8 days

The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index in April
Williamstown, MO

Average UV index in April - Williamstown, MO
  • Average UV index in April: 4

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in April
Williamstown, MO

Average cloud cover in April - Williamstown, MO
  • Average cloud cover in April: 43

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in April
Williamstown, MO

Average visibility in April - Williamstown, MO
  • 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).

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Williamstown, Missouri, USA

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