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 3 sunny days. Just be prepared for some rain, as there are usually around 14 rainy days and 123 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Average weather
☀️
+75°F
Avg. max. temperature
+37°F
Min.
+99°F
Max.
123 mm
Total precipitation
66%
Avg. humidity
3 m/s
Avg. wind
3 ☀️
Sunny Days
10 ⛅️
Cloudy
14 🌦
Rainy
Our opinion: Washington has good weather in May.
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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
Going from a maximum of +86°F during the day to a minimum of +46°F during the night, the temperature in May averages around +75°F.
The average maximum temperature goes up 45% by the end of the month, compared with the beginning of the month, from +61°F to +79°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.
April
May
June
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
95 mm
123 mm
118 mm
Wind
3 m/s
3 m/s
3 m/s
Humidity
60%
66%
66%
Air pressure
1015 HPa
1015 HPa
1014 HPa
Sunny days
4
3
2
Cloudy days
10
10
9
Rainy days
13
14
13
Snowy days
0
0
0
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 95 mm to 123 mm.Humidity rises from 60% to 66%.The average wind speed doesn’t change much during May, staying around 3 m/s.The days becoming less sunny, going from 4 sunny days in April to 3 in May.
June brings much the same weather, it remains good.
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 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Washington is gradually decreasing during May, going from 5 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
Typically, there is a 52% chance of rain on an average day in May, with total rainfall of approximately 163 mm. The maximum amount of rainfall per day is around 79 mm, which is considered heavy rain.May is a pretty wet month with over 16 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 42% chance of precipitation and 135 mm of rainfall per day. February, on the other hand, is the driest month with a mere 28% chance of precipitation and 58 mm of rainfall per day.
How was the weather last May in Washington?
This is the weather in Washington in May 2023:
1 May
🌧️
+60°F
2 May
🌧️
+57°F
3 May
🌧️
+55°F
4 May
🌧️
+64°F
5 May
☁️
+68°F
6 May
☀️
+75°F
7 May
☁️
+75°F
8 May
☁️
+82°F
9 May
🌧️
+75°F
10 May
☁️
+73°F
11 May
☁️
+80°F
12 May
☁️
+87°F
13 May
☁️
+78°F
14 May
☀️
+79°F
15 May
☁️
+76°F
16 May
☁️
+80°F
17 May
🌧️
+73°F
18 May
☀️
+72°F
19 May
☁️
+74°F
20 May
☁️
+80°F
21 May
☀️
+79°F
22 May
☀️
+81°F
23 May
☁️
+76°F
24 May
☁️
+82°F
25 May
☀️
+74°F
26 May
☁️
+76°F
27 May
☁️
+78°F
28 May
☁️
+74°F
29 May
🌧️
+76°F
30 May
☁️
+76°F
31 May
☀️
+79°F
In May 2023 Washington had 7 sunny days, 17 cloudy days, and 7 rainy days. The average maximum temperature was +75°F, with an absolute maximum of +86°F and a minimum of +55°F. The average humidity was 64%, with a maximum of 100% and a minimum of 29%. 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 1996 (+64°F) and the highest in 2023 (+70°F). The driest year was 2007 with only 654 mm of rainfall, and the wettest year was 2022 with 1801 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.
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, 2023.
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.
