United StatesAverage weather for Washington in May
It's warm in May in Washington with an average temperature of 29°C. Temperatures this month range from a low of 26°C to a high of 34°C. At night, you can expect temperatures between 12°C and 18°C.
Start of May
The month of May starts in Washington with hot temps, averaging around 28°C during the day and nights around 14°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers.
Mid May
By mid-May, daytime temps rise to around 29°C, with nights around 15°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
Since it cools down at night, it’s a good idea to wear layers.
End of May
By the end of May, the average daytime temperature in Washington is around 31°C, while nighttime temps are about 16°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
Because temperatures drop in the evening, wearing layers is recommended.
According to weather history, there is only 8,2 mm of precipitation in May. The wind speed is around 5 Bft, mostly coming from the South.
Washington in May |
New York | ||
|---|---|---|---|
 Average temperature |
29°C | 22°C | |
 Max. temperature |
34°C | 28°C | |
| Min. temperature |
26°C | -5°C | |
 Total precipitation |
8,2 mm | 105 mm | |
| Rainy days |
2 days | 14 days | |
April
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Washington?
Looking for great weather? May is a good time to be in Washington. The temperatures are nice, and there’s not too much rain.
Temperature records
With 40°C in 2020, Washington reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 12°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 24°C.
Check out the climate of Washington for all months and discover the best travel time
Daily Temperature in May in Washington
This chart shows the average daily high and low temperatures in May for Washington, 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 May in Washington
The chart below shows the average daily precipitation in May for Washington, 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 May, you can expect about 2 days of precipitation 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 few years.
Total precipitation in May in Washington over the years
This chart shows the average precipitation in May in Washington, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Washington
Click on any day in May to get detailed info about the usual 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
