September weather forecast
Normandy Park, WA

Share

Weather in September

September, the first month of the autumn in Normandy Park, is still a pleasant month, with an average temperature fluctuating between 70.3°F (21.3°C) and 50.4°F (10.2°C).

Temperature

Normandy Park experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a moderately hot 77.7°F (25.4°C) in August to an agreeable 70.3°F (21.3°C). Normandy Park's September nights cool down to an average low-temperature of 50.4°F (10.2°C).

Humidity

The average relative humidity in September in Normandy Park is 74%.

Rainfall

In Normandy Park, during September, the rain falls for 10.5 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, in Normandy Park, there are 138.2 rainfall days, and 14.09" (358mm) of precipitation is accumulated.

Snowfall

In Normandy Park, snow does not fall in April through October.

Daylight

In September, the average length of the day is 12h and 32min.
On the first day of September in Normandy Park, sunrise is at 6:29 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:49 pm PDT.

Sunshine

In Normandy Park, the average sunshine in September is 9.2h.

UV index

In Normandy Park, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
[Resources]

Frequently asked questions

What are the temperatures in Normandy Park in September?

September temperatures vary between a high-temperature of 70.3°F (21.3°C) and a low-temperature of 50.4°F (10.2°C).

What is the average humidity in September in Normandy Park?

The average relative humidity in September is 74%.

How many days does it rain in September in Normandy Park?

In September, in Normandy Park, Washington, the rain falls for 10.5 days. Throughout September, 0.91" (23mm) of precipitation is accumulated.

When it does not snow in Normandy Park?

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

How many hours of daylight does Normandy Park have in September?

In September, the average day length in Normandy Park is 12h and 32min.

When are sunrise and sunset in September in Normandy Park?

On the first day of September, sunrise is at 6:29 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:49 pm PDT.

How long on average sun shines in September in Normandy Park?

The average sunshine duration in September is 9.2h.

What is the UV index intensity in September in Normandy Park?

In September, the average daily maximum UV index in Normandy Park is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Normandy Park, WA

Average temperature in September - Normandy Park, WA
  • Average high temperature in September: 70.3°F

The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).

  • Average low temperature in September: 50.4°F

The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).

[Resources]

Average pressure in September
Normandy Park, WA

Average pressure in September - Normandy Park, WA
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

[Resources]

Average wind speed in September
Normandy Park, WA

Average wind speed in September - Normandy Park, WA
  • Average wind speed in September: 3.9mph

The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.6mph).

[Resources]

Average humidity in September
Normandy Park, WA

Average humidity in September - Normandy Park, WA
  • Average humidity in September: 74%

The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).

[Resources]

Average rainfall in September
Normandy Park, WA

Average rainfall in September - Normandy Park, WA
  • Average rainfall in September: 0.91"

The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").

[Resources]

Average rainfall days in September
Normandy Park, WA

Average rainfall days in September - Normandy Park, WA
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).

[Resources]

Average snowfall in September
Normandy Park, WA

Average snowfall in September - Normandy Park, WA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Normandy Park, WA

Average snowfall days in September - Normandy Park, WA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Normandy Park, WA

Average daylight in September / Average sunshine in September - Normandy Park, WA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

[Resources]

Average sunshine days in September
Normandy Park, WA

Average sunshine days in September - Normandy Park, WA
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).

[Resources]

Average UV index in September
Normandy Park, WA

Average UV index in September - Normandy Park, WA
  • Average UV index in September: 4

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

[Resources]

Average cloud cover in September
Normandy Park, WA

Average cloud cover in September - Normandy Park, WA
  • Average cloud cover in September: 35

The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).

[Resources]

Average visibility in September
Normandy Park, WA

Average visibility in September - Normandy Park, WA
  • Average visibility in September: 6mi

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).

[Resources]

Normandy Park, Washington, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location