April 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
April in Olympia, Washington, is a mild spring month, with average temperature fluctuating between 57°F (13.9°C) and 37.9°F (3.3°C).

Temperature

In Olympia, the average high-temperature slightly increases, from a fresh 51.1°F (10.6°C) in March, to a moderate 57°F (13.9°C). In April, in Olympia, the average low-temperature is 37.9°F (3.3°C).

Humidity

The average relative humidity in April is 82%.

Rainfall

In Olympia, during April, the rain falls for 18.4 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Olympia, Washington, during the entire year, the rain falls for 177.4 days and collects up to 37.05" (941mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Olympia, Washington, the average length of the day is 13.7h.

Sunshine

The average sunshine in Olympia is 7h.

UV index

The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 3 in April transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Olympia?

In April, in Olympia, the average high-temperature is 57°F (13.9°C), and the average low-temperature is 37.9°F (3.3°C).

What is the average humidity in April in Olympia?

In April, the average relative humidity in Olympia, Washington, is 82%.

How many days does it rain in April in Olympia?

In Olympia, Washington, during April, the rain falls for 18.4 days and regularly aggregates up to 2.76" (70mm) of precipitation.

Does it snow in Olympia in April?

In April, it doesn't snow. March is the latest month when it typically snows.

When it does not snow in Olympia?

In Olympia, Washington, snow does not fall in April through October.

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

In April, the average length of the day is 13.7h.

How many hours of sunshine does Olympia have in April?

In Olympia, Washington, the average sunshine in April is 7h.

What is the UV index reading in April in Olympia?

In Olympia, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
Average temperature in April - Olympia, WA
  • Average high temperature in April: 13.9°C

The warmest month (with the highest average high temperature) is August (25.9°C).
The month with the lowest average high temperature is December (6.1°C).

  • Average low temperature in April: 3.3°C

The month with the highest average low temperature is August (10.3°C).
The coldest month (with the lowest average low temperature) is December (0.8°C).

Average pressure in April - Olympia, WA
  • Average pressure in April: 1017.9mbar

The month with the highest atmospheric pressure is January (1018.9mbar).
The month with the lowest atmospheric pressure is March (1016.4mbar).

Average wind speed in April - Olympia, WA
  • Average wind speed in April: 7.3km/h

The windiest months (with the highest average wind speed) are March and November (7.4km/h).
The calmest month (with the lowest average wind speed) is September (6.1km/h).

Average humidity in April - Olympia, WA
  • Average humidity in April: 82%

Months with the highest relative humidity are January, November and December (89%).
The month with the lowest relative humidity is July (71%).

Average rainfall in April - Olympia, WA
  • Average rainfall in April: 70mm

The wettest month (with the highest rainfall) is December (147mm).
The driest month (with the least rainfall) is July (10mm).

Average rainfall days in April - Olympia, WA
  • Average rainfall days in April: 18.4 days

The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is August (5.5 days).

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

The month with the highest snowfall is February (59mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in April - Olympia, WA
  • Average snowfall days in April: 0.1 days

The month with the highest number of snowfall days is February (3.3 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in April / Average sunshine in April - Olympia, WA
  • Average daylight in April: 13.7h

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

  • Average sunshine in April: 7h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is December (Average sunshine: 3.4h).

Average sunshine days in April - Olympia, WA
  • Average sunshine days in April: 9.9 days

The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is February (8.4 days).

Average UV index in April - Olympia, WA
  • Average UV index in April: 3

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in April - Olympia, WA
  • Average cloud cover in April: 58

Months with the most cloud cover are January and December (Cloud cover 65).
Months with the least cloud cover are July and August (Cloud cover 35).

Average visibility in April - Olympia, WA
  • Average visibility in April: 7km

Months with the highest visibility are June, July and August (8km).
Months with the lowest visibility are January, February, November and December (6km).