Normal weather for Mercer Island in March
It's cool in March in Mercer Island with an average temperature of 13°C. Temperatures this month range from a low of 10°C to a high of 15°C. At night, you can expect temperatures between 3°C and 8°C.
In March, there is an average of 148 mm of precipitation, spread over 18 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Mercer Island in March |
New York | ||
|---|---|---|---|
 Average Temperature |
13°C | 11°C | |
 High Temp |
15°C | 14°C | |
| Low Temp |
10°C | 6°C | |
 Total Precipitation |
148 mm | 63 mm | |
| Rainy Days |
18 days | 10 days | |
Start of March
The month of March starts in Mercer Island with cool temps, averaging around 12°C during the day and nights around 4°C. There are plenty of days with a good chance of precipitation.
With the temperature difference between day and night, it’s smart to wear layers. During the day, go for a warm jacket, sweater or hoodie, and long pants. For the evening and morning, we recommend a thick jacket, sweater, and long pants.
Mid March
By mid-March, daytime temps rise to around 14°C, with nights around 6°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
Since it cools down at night, it’s a good idea to wear layers. During the day, choose a light jacket, sweater or hoodie, and long pants. For the evening and morning, we recommend a thick jacket, sweater, and long pants.
End of March
By the end of March, the average daytime temperature in Mercer Island is around 14°C, while nighttime temps are about 7°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Because temperatures drop in the evening, wearing layers is recommended. During the day, choose a light jacket, sweater or hoodie, and long pants. For the evening and morning, we recommend a thick jacket, sweater, and long pants.
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UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is March a good time to visit Mercer Island?
Looking for sun? March isn’t a good month to be in Mercer Island. There’s too much chance of rain this month.
Temperature records for Mercer Island in March
Check out the climate of Mercer Island for all months and discover the best travel time
February
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Daily Temperature in March in Mercer Island
This chart shows the average daily high and low temperatures in March for Mercer Island, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in March in Mercer Island
The chart below shows the average daily precipitation in March for Mercer Island, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for March, you can expect about 18 days of precipitation in Mercer Island.
Daily UV Index in March in Mercer Island
This chart shows the average daily UV index in March in Mercer Island, 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 March in Mercer Island Over the Years
This chart shows the average temperature in March in Mercer Island, measured in degrees Celsius, over the past few years.
Total Precipitation in March in Mercer Island Over the Years
This chart shows the average precipitation in March in Mercer Island, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in March for Mercer Island
Click on any day in March to get detailed info about the usual weather on that day in Mercer Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in March in Mercer Island
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Average Weather in Mercer Island by Month
Click on a month below to see detailed weather info for Mercer Island. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Mercer Island for all months at once
