Temperatures in May
It's warm in May in Washington with an average temperature of 26°C. Temperatures this month range from a low of 20°C to a high of 29°C. At night, you can expect temperatures between 10°C and 19°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Washington in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Washington with warm temperatures, averaging around 24°C during the day and nights close to 13°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-May
By mid-May, the average daytime temperature rises to around 25°C, with nights close to 15°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of May
By the end of May, the average daytime temperature in Washington will be around 28°C, with nights close to 18°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers.
Precipitation in May
In May, there is an average of 117 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 32% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Washington. 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.
Washington in May |
UK | ||
|---|---|---|---|
 Average Temperature |
26°C | 18°C | |
 High Temp |
29°C | 21°C | |
| Low Temp |
20°C | 15°C | |
 Total Precipitation |
117 mm | 46 mm | |
| Rainy Days |
10 days | 8 days | |
April
UV index
The UV index is a maximum of 6 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 May a good time to visit Washington?
After some sun? Then May isn’t the best time to be in Washington. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Washington in May
With 35°C, Washington hit the highest temperature in the last 10 years in May 2022. The lowest daytime temperature in this month was 10°C in 2020. The extreme night temperatures ranged from a low of 1°C to a high of 24°C.
Check out the climate of Washington for all months and discover the best travel time
The climate of Washington is based on weather data from . Other spots, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Washington for a full picture of the climate.
Daily Temperature in May in Washington
This chart shows the average daily temperatures, both day and night, for each day in May in Washington, 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 May in Washington
The chart below shows the average daily precipitation in May for Washington, 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 May, you can expect around 10 days of rain in Washington.
Daily UV Index in May in Washington
This chart shows the average daily UV index in May in Washington, 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 May in Washington Over the Years
This chart shows the average temperature in May in Washington, measured in degrees Celsius, over the past years.
Total Precipitation in May in Washington Over the Years
This chart shows the average precipitation in May in Washington, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Washington
Click on a specific day in May for detailed info on the typical weather on that day in Washington. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Washington
Have you been to Washington in May?
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Average Weather in Washington by Month
Click on a month below to see detailed weather info for Washington. 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 Washington for all months at once
