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
The coming of April brings a minor shift in Waterloo's weather, with average high-temperatures adjusting from March's cool 51.6°F (10.9°C) to a moderate 57.6°F (14.2°C). An average low-temperature of 37.9°F (3.3°C) is common during the nights of April.Humidity
In Waterloo, the average relative humidity in April is 82%.Rainfall
In Waterloo, in April, during 17.8 rainfall days, 3.07" (78mm) of precipitation is typically accumulated. In Waterloo, during the entire year, the rain falls for 163.3 days and collects up to 29.92" (760mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In April, the average length of the day is 13h and 31min.On the first day of April in Waterloo, sunrise is at 6:50 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:15 pm PDT.
Sunshine
The average sunshine in April is 7.1h.UV index
The average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 3 during April translates into these guidelines:
Be vigilant - A duty to shield skin and eyes from injury exists. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Waterloo in April?
What is the average humidity in April?
How many days does it rain in April in Waterloo?
When it does not snow?
Does it snow in April?
What is the average length of the day in April?
When is the sunrise / sunset in April in Waterloo?
How many hours of sunshine does Waterloo have in April?
What is the UV index reading in April?
Average temperature in April
Waterloo, OR
- Average high temperature in April: 57.6°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.3°F).
- Average low temperature in April: 37.9°F
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in April
Waterloo, OR
- Average pressure in April: 30.07"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in April
Waterloo, OR
- Average wind speed in April: 4.7mph
The windiest months (with the highest average wind speed) are January and March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in April
Waterloo, OR
- Average humidity in April: 82%
The months with the highest relative humidity are January, February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall in April
Waterloo, OR
- Average rainfall in April: 3.07"
The wettest month (with the highest rainfall) is December (4.41").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in April
Waterloo, OR
- Average rainfall days in April: 17.8 days
The month with the highest number of rainy days is March (20.1 days).
The months with the least rainy days are July and August (3.8 days).
Average snowfall in April
Waterloo, OR
- Average snowfall in April: 0"
The month with the highest snowfall is February (2.13").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Waterloo, OR
- Average snowfall days in April: 0.2 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Waterloo, OR
- Average daylight in April: 13h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in April: 7h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in April
Waterloo, OR
- Average sunshine days in April: 10 days
The month with the most sunshine days is July (25.6 days).
The month with the least sunshine days is March (9.1 days).
Average UV index in April
Waterloo, OR
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Waterloo, OR
- Average cloud cover in April: 56
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in April
Waterloo, OR
- Average visibility in April: 5mi
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is February (4mi).
Waterloo, Oregon, USA
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