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Washington in May: Weather, Average temperature and Climate

Discover the weather for Washington in May and if it’s a good time to travel (based on historical data).
Check flight prices to Washington on Avionero:
May

Weather in Washington in May 2024

Good Weather
Warm
☁️
Cloudy
Planning a trip to Washington in May? You are in luck! The weather is generally good, with an average maximum temperature of +75°F and approximately 4 sunny days. Just be prepared for some rain, as there are usually around 10 rainy days and 122 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flights in one click on Avionero.

Average weather

☀️
+75°F
Avg. max. temperature
+37°F
Min.
+99°F
Max.
122 mm
Total precipitation
66%
Avg. humidity
2 m/s
Avg. wind
4 ☀️
Sunny Days
17 ⛅️
Cloudy
10 🌦
Rainy
Our opinion: Washington has good weather in May.

Average temperature in Washington in May

Here are the expected maximum, average and minimum temperatures in Washington for May based on the historical data.
Last Year
Historical Data

The temperature in May is +77°F on average, with a range between a maximum of +97°F during the day and a minimum of +43°F at night.

The average maximum temperature goes up 57% by the end of the month, compared with the beginning of the month, from +66°F to +97°F.

Is Washington warm or cold in May?

Washington is typically warm in May.

Maximum temperatures go up compared to the previous month from +66°F to +75°F. The minimum temperature also goes up from +48°F to +57°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how May is compared to other months in Washington:

Climate in Washington in May

Washington weather looks like this, on average, in May and the surrounding months.
AprilMayJune
Avg. temperature
+66°F+75°F+84°F
Min. temperature
+27°F+37°F+48°F
Max. temperature
+93°F+99°F+104°F
Rainfall
94 mm122 mm117 mm
Wind
3 m/s2 m/s2 m/s
Humidity
59%66%66%
Air pressure
1014 HPa1014 HPa1014 HPa
Sunny days
543
Cloudy days
161718
Rainy days
9109
Snowy days
000

May weather is still as good as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +66°F to +75°F during the day. Prepare for more rain. Average rainfall goes from 94 mm to 122 mm. Humidity rises from 59% to 66%. Winds are calmer in comparison to April, going down from 3 m/s to 2 m/s on average. The days becoming less sunny, going from 5 sunny days in April to 4 in May.

June brings much the same weather, it remains good.

Wind

Wind speed in Washington in May based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Washington is gradually increasing during May, going from 2 m/s to 2 m/s over the course of the month.

Rain

Amount of rainfall in mm during May in Washington based on historical data.
Last Year
Historical Data
A chance of rain on a typical day in May stands at 68%, leading to total precipitation of around 217 mm. The maximum amount of rainfall per day is around 45 mm, which is moderate rain. May is a pretty wet month with over 21 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
May is one of the rainiest months in Washington, here is a comparison with other months, total mm:
Washington wettest month is July, where a typical day has a 32% chance of precipitation and 133 mm of rainfall per day. January, on the other hand, is the driest month with a mere 16% chance of precipitation and 59 mm of rainfall per day.

How was the weather last May in Washington?

This is the weather in Washington in May 2023:
1 May
☁️
+66°F
2 May
☁️
+80°F
3 May
☀️
+74°F
4 May
☁️
+76°F
5 May
☁️
+70°F
6 May
🌧️
+64°F
7 May
🌧️
+57°F
8 May
☁️
+56°F
9 May
🌧️
+70°F
10 May
🌧️
+73°F
11 May
☀️
+73°F
12 May
☁️
+73°F
13 May
🌧️
+74°F
14 May
🌧️
+71°F
15 May
☁️
+82°F
16 May
🌧️
+78°F
17 May
☀️
+83°F
18 May
☁️
+77°F
19 May
☁️
+84°F
20 May
☁️
+90°F
21 May
☁️
+93°F
22 May
☁️
+90°F
23 May
☁️
+73°F
24 May
🌧️
+68°F
25 May
☁️
+71°F
26 May
☁️
+72°F
27 May
☁️
+79°F
28 May
☁️
+78°F
29 May
☁️
+83°F
30 May
☁️
+90°F
31 May
☀️
+96°F
In May 2023 Washington had 4 sunny days, 19 cloudy days, and 8 rainy days. The average maximum temperature was +77°F, with an absolute maximum of +97°F and a minimum of +57°F. The average humidity was 73%, with a maximum of 96% and a minimum of 25%. The average wind speed was 3 m/s, with a maximum of 10 m/s and a minimum of 0 m/s.
Are you planning a trip in May?

Climate Change Over the Years

This is how Washington climate has changed over the last 43 years.

The climate in Washington in May has not changed that much over the last 43 years.

The average temperature was the lowest in 2003 (+70°F) and the highest in 1991 (+84°F). The driest year was 2007 with only 48 mm of rainfall, and the wettest year was 2003 with 498 mm.

FAQ

Frequently asked questions about the weather in Washington in May:

Is May a good time to visit Washington?

May is a really good time to go to Washington. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Washington.

Can you sunbathe in Washington in May?

May is warm in Washington. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Washington rainy in May?

Washington is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Washington in May?

Usually, it’s not very sunny in Washington in May, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in USA

Check out the weather for other cities in USA.

Monthly weather in Washington

Source of the data

For this page, we’ve looked at the typical weather in Washington, based on historical hourly weather data from January 1, 1979, to December 31, 2022.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.