September weather forecast
Weallup Lake, WA

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Weather in September

The first month of the autumn, September, is also an enjoyable month in Weallup Lake, Washington, with an average temperature fluctuating between 67.1°F (19.5°C) and 50°F (10°C).

Temperature

A subtle change in temperatures is noted as August gives way to September, with average highs reducing from an agreeable 73°F (22.8°C) to an enjoyable 67.1°F (19.5°C). The month of September records an average low-temperature of 50°F (10°C).

Humidity

The average relative humidity in September is 77%.

Rainfall

In Weallup Lake, during September, the rain falls for 12.3 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Weallup Lake, during the entire year, the rain falls for 179.1 days and collects up to 29.57" (751mm) of precipitation.

Snowfall

In Weallup Lake, snow does not fall in May through October.

Daylight

In Weallup Lake, the average length of the day in September is 12h and 33min.
On the first day of the month, sunrise is at 6:28 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:49 pm PDT.

Sunshine

In Weallup Lake, the average sunshine in September is 9.2h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: In September, a daily UV index of 3 turns into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Weallup Lake in September?

Weallup Lake in September has an average high-temperature of 67.1°F (19.5°C) and an average low-temperature of 50°F (10°C).

What is the average humidity in September?

In Weallup Lake, the average relative humidity in September is 77%.

How many days does it rain in September?

In Weallup Lake, in September, it is raining for 12.3 days, with typically 1.77" (45mm) of accumulated precipitation.

When it does not snow?

In Weallup Lake, snow does not fall in May through October.

What is the average length of the day in September?

In September, the average day length is 12h and 33min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:49 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?

The average sunshine duration in September is 9.2h.

How high is the UV index in September?

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium hazard to health 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
Weallup Lake, WA

Average temperature in September - Weallup Lake, WA
  • Average high temperature in September: 67.1°F

The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is December (42.3°F).

  • Average low temperature in September: 50°F

The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).

Average pressure in September
Weallup Lake, WA

Average pressure in September - Weallup Lake, WA
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed in September
Weallup Lake, WA

Average wind speed in September - Weallup Lake, WA
  • Average wind speed in September: 4mph

The windiest months (with the highest average wind speed) are March and November (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

Average humidity in September
Weallup Lake, WA

Average humidity in September - Weallup Lake, WA
  • Average humidity in September: 77%

The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (73%).

Average rainfall in September
Weallup Lake, WA

Average rainfall in September - Weallup Lake, WA
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is November (4.06").
The driest month (with the least rainfall) is July (0.47").

Average rainfall days in September
Weallup Lake, WA

Average rainfall days in September - Weallup Lake, WA
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.1 days).

Average snowfall in September
Weallup Lake, WA

Average snowfall in September - Weallup Lake, WA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.68").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Weallup Lake, WA

Average snowfall days in September - Weallup Lake, WA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Weallup Lake, WA

Average daylight in September / Average sunshine in September - Weallup Lake, WA
  • Average daylight in September: 12h and 4min

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 September: 9h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).

Average sunshine days in September
Weallup Lake, WA

Average sunshine days in September - Weallup Lake, WA
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is August (23.1 days).
The months with the least sunshine days are February and November (8.6 days).

Average UV index in September
Weallup Lake, WA

Average UV index in September - Weallup Lake, WA
  • Average UV index in September: 3

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

Average cloud cover in September
Weallup Lake, WA

Average cloud cover in September - Weallup Lake, WA
  • Average cloud cover in September: 34

The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 26).

Average visibility in September
Weallup Lake, WA

Average visibility in September - Weallup Lake, WA
  • Average visibility in September: 6mi

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

Weallup Lake, Washington, USA

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