Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The shift into May is marked by a modest rise in the average high-temperature, moving from April's chilly 48.2°F (9°C) to a mild 56.8°F (13.8°C). Piedmont's May nights cool down to an average low-temperature of 40.5°F (4.7°C).Humidity
In Piedmont, Washington, the average relative humidity in May is 80%.Rainfall
In May, the rain falls for 13.5 days. Throughout May, 1.26" (32mm) of precipitation is accumulated. Throughout the year, there are 150.3 rainfall days, and 17.36" (441mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Piedmont.Daylight
The average length of the day in May is 15h and 13min.On the first day of May, sunrise is at 5:55 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 9:06 pm PDT.
Sunshine
The average sunshine in May is 8.6h.UV index
In May, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, a regular UV index of 3 translates into these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
Does it snow in Piedmont in May?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Piedmont have in May?
What is the UV index reading in May?
Average temperature in May
Piedmont, WA
- Average high temperature in May: 56.8°F
The warmest month (with the highest average high temperature) is August (69.1°F).
The month with the lowest average high temperature is December (39.4°F).
- Average low temperature in May: 40.5°F
The month with the highest average low temperature is August (48.6°F).
The coldest months (with the lowest average low temperature) are February and December (31.5°F).
Average pressure in May
Piedmont, WA
- Average pressure in May: 30.04"Hg
The month with the highest atmospheric pressure is July (30.07"Hg).
The month with the lowest atmospheric pressure is March (29.99"Hg).
Average wind speed in May
Piedmont, WA
- Average wind speed in May: 4.1mph
The windiest months (with the highest average wind speed) are January and November (5.2mph).
The calmest months (with the lowest average wind speed) are August and September (3.5mph).
Average humidity in May
Piedmont, WA
- Average humidity in May: 80%
The months with the highest relative humidity are January and December (89%).
The months with the lowest relative humidity are July and August (76%).
Average rainfall in May
Piedmont, WA
- Average rainfall in May: 1.26"
The wettest month (with the highest rainfall) is January (3.35").
The driest months (with the least rainfall) are July and August (0.43").
Average rainfall days in May
Piedmont, WA
- Average rainfall days in May: 13.5 days
The month with the highest number of rainy days is March (16.1 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in May
Piedmont, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Piedmont, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (7.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Piedmont, WA
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Piedmont, WA
- Average sunshine days in May: 14 days
The month with the most sunshine days is August (22.5 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in May
Piedmont, WA
- Average UV index in May: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Piedmont, WA
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Piedmont, WA
- Average visibility in May: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March and December (4mi).
Piedmont, Washington, USA
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