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
Noticing a change, the average high-temperature during April moves from March's cool 50°F (10°C) to a comfortable 61.5°F (16.4°C). Siam encounters a steady low-temperature average of 43.3°F (6.3°C) throughout the month of April.Humidity
In April, the average relative humidity in Siam is 71%.Rainfall
In Siam, during April, the rain falls for 12.4 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Siam, during the entire year, the rain falls for 114.9 days and collects up to 18.39" (467mm) of precipitation.Snowfall
Months with snowfall in Siam, Iowa, are January through April, October through December. April is the last month it regularly snows in Siam. During 1 snowfall days, in April, Siam aggregates 1.1" (28mm) of snow. Throughout the year, there are 25.2 snowfall days, and 7.4" (188mm) of snow is accumulated.Daylight
In Siam, the average length of the day in April is 13h and 19min.On the first day of April, sunrise is at 7:01 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 8:14 pm CDT.
Sunshine
The average sunshine in April in Siam is 8.3h.UV index
The average daily maximum UV index in April in Siam is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 4 in April translates into this advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the average April temperature in Siam?
What is the average humidity in April in Siam?
How many days does it rain in April in Siam?
What is the last month it snows in Siam?
How many hours of daylight does Siam have in April?
When are sunrise and sunset in April in Siam?
How many hours of sunshine does Siam have in April?
What is the UV index intensity in April in Siam?
Average temperature in April
Siam, IA
- Average high temperature in April: 61.5°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in April: 43.3°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 (17.2°F).
Average pressure in April
Siam, IA
- Average pressure in April: 29.91"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in April
Siam, IA
- Average wind speed in April: 10.2mph
The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in April
Siam, IA
- Average humidity in April: 71%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (69%).
Average rainfall in April
Siam, IA
- Average rainfall in April: 1.42"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in April
Siam, IA
- Average rainfall days in April: 12.4 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in April
Siam, IA
- Average snowfall in April: 1.1"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Siam, IA
- Average snowfall days in April: 1 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Siam, IA
- 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 18min).
- Average sunshine in April: 8h and 2min
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 36min).
Average sunshine days in April
Siam, IA
- Average sunshine days in April: 15 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in April
Siam, IA
- 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).
Average cloud cover in April
Siam, IA
- Average cloud cover in April: 42
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in April
Siam, 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).
Siam, Iowa, USA
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