Temperatures in April
It's cool to moderate in April in Seattle with an average temperature of 16°C. Temperatures this month range from a low of 13°C to a high of 19°C. At night, you can expect temperatures between 6°C and 10°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Seattle in April. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of April
The month of April starts in Seattle with cool temperatures, averaging around 15°C during the day and nights close to 7°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-April
By mid-April, the average daytime temperature rises to around 16°C, with nights close to 8°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of April
By the end of April, the average daytime temperature in Seattle will be around 17°C, with nights close to 9°C. A shower might show up, but overall the weather will be dry and sunny.
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Water temperature
The water temperature at Seattle is 9°C this month. This is too cold to swim without protective gear.
Precipitation in April
In April, there is an average of 59 mm of precipitation, spread over 11 days. Of the total precipitation, about 0,3 cm falls as snow in April. The wind speed is around 3 Bft, mostly coming from the Southwest.
The average precipitation chance is 37% per day this month. The weather’s variable. There are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in April for Seattle. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Seattle in April |
London | ||
|---|---|---|---|
 Average Temperature |
16°C | 15°C | |
 High Temp |
19°C | 18°C | |
| Low Temp |
13°C | 12°C | |
 Total Precipitation |
59 mm | 29 mm | |
| Rainy Days |
11 days | 7 days | |
 Total Snowfall |
0,3 cm | 0 cm | |
| Snowy Days |
1 day | 0 days | |
March
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is April a good time to visit Seattle?
Looking for sun and warm weather? Then April isn’t the best time to be in Seattle. The temperature is too low this month for a warm stay.
Temperature records for Seattle in April
With 31°C, Seattle hit the highest temperature in the last 10 years in April 2016. The lowest daytime temperature in this month was 7°C in 2022. The extreme night temperatures ranged from a low of 0°C to a high of 14°C.
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Daily Temperature in April in Seattle
This chart shows the average daily temperatures, both day and night, for each day in April in Seattle, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in April in Seattle
The chart below shows the average daily precipitation in April for Seattle, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for April, you can expect around 11 days of rain in Seattle.
Daily Snowfall in April in Seattle
This chart shows the average daily snowfall in April in Seattle, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in April.
Daily UV Index in April in Seattle
This chart shows the average daily UV index in April in Seattle, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in April in Seattle Over the Years
This chart shows the average temperature in April in Seattle, measured in degrees Celsius, over the past years.
Total Precipitation in April in Seattle Over the Years
This chart shows the average precipitation in April in Seattle, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in April in Seattle per year
This chart shows the average snowfall in April in Seattle, measured in centimetres, over the past years.
Daily climate in April for Seattle
Click on a specific day in April for detailed info on the typical weather on that day in Seattle. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in April in Seattle
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Average Weather in Seattle by Month
Click on a month below to see detailed weather info for Seattle. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
