Olympia
Washington, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Olympia, WA

The calm Capitol Lake overlooking the Washington State Capitol building in Olympia, Washington
The calm Capitol Lake overlooking the Washington State Capitol building in Olympia, Washington
May, the last month of the spring, in Olympia, is a comfortable month, with average temperature fluctuating between 43.2°F (6.2°C) and 65.3°F (18.5°C).

Temperature

In Olympia, the average high-temperature in May slightly increases, from a moderate 58.8°F (14.9°C) in April, to a comfortable 65.3°F (18.5°C). In May, in Olympia, the average low-temperature is 43.2°F (6.2°C).

Humidity

In Olympia, the average relative humidity is 72.9%.

Rainfall

In Olympia, it is raining for 12.5 days, with typically 2.3" (59.2mm) of accumulated precipitation. Throughout the year, in Olympia, there are 162.8 rainfall days, and 50" (1270mm) of precipitation is accumulated.

Snowfall

In Olympia, during the entire year, snow aggregates up to 10.8" (274.4mm).

Daylight

The average length of the day in May is 15.1h.

Sunshine

The average sunshine is 8h.

UV index

The average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for the average person.
The daily maximum UV index of 6 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in May in Olympia?

In May, in Olympia, Washington, the average high-temperature is 65.3°F (18.5°C), and the average low-temperature is 43.2°F (6.2°C).

What is the average humidity in May in Olympia?

In Olympia, Washington, the average relative humidity in May is 72.9%.

How many days does it rain in May in Olympia?

In Olympia, Washington, during May, the rain falls for 12.5 days and regularly aggregates up to 2.3" (59.2mm) of precipitation.

What is the average length of the day in May in Olympia?

The average length of the day in May is 15.1h.

How many hours of sunshine does Olympia have in May?

In Olympia, the average sunshine in May is 8h.

What is the UV index intensity in May in Olympia?

The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.
Average temperature in May - Olympia, WA
  • Average high temperature in May: 18.5°C

The warmest month (with the highest average high temperature) is August (25.4°C).
The month with the lowest average high temperature is December (6.8°C).

  • Average low temperature in May: 6.2°C

The month with the highest average low temperature is July (10.4°C).
The coldest month (with the lowest average low temperature) is December (0.3°C).

Average humidity in May - Olympia, WA
  • Average humidity in May: 72.9%

The month with the highest relative humidity is December (89.1%).
The month with the lowest relative humidity is July (70.8%).

Average rainfall in May - Olympia, WA
  • Average rainfall in May: 59.2mm

The wettest month (with the highest rainfall) is November (219.2mm).
The driest month (with the lowest rainfall) is July (16mm).

Average rainfall days in May - Olympia, WA
  • Average rainfall days in May: 12.5 days

The month with the highest number of rainy days is November (20.1 days).
The month with the lowest number of rainy days is July (4.6 days).

Average snowfall in May - Olympia, WA
  • Average snowfall in May: 0mm

The month with the highest snowfall is February (119.4mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in May - Olympia, WA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (2.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in May / Average sunshine in May - Olympia, WA
  • Average daylight in May: 15.1h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in May: 8h

The month with most sunshine is July (Average sunshine: 10h).
Months with least sunshine are January and December (Average sunshine: 2).

Average UV index in May - Olympia, WA
  • Average UV index in May: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).