September weather forecast
Lake Goodwin, WA

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Weather in September

The first month of the autumn, September, is still a refreshing month in Lake Goodwin, Washington, with an average temperature fluctuating between 66.2°F (19°C) and 49.1°F (9.5°C).

Temperature

Lake Goodwin's progression into September involves a minor drop in the average high-temperature, slightly receding from an agreeable 72.3°F (22.4°C) in August to a comfortable 66.2°F (19°C). In Lake Goodwin, September's nights observe an average temperature dip to a frosty 49.1°F (9.5°C).

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Lake Goodwin, during September, the rain falls for 13.5 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, there are 188.6 rainfall days, and 34.92" (887mm) of precipitation is accumulated.

Snowfall

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

Daylight

In September, the average length of the day in Lake Goodwin is 12h and 34min.
On the first day of September, 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.

Sunshine

The average sunshine in September is 9.2h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 4 during September translates into the following guidance:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.

Frequently asked questions

What are the temperatures in September?

The average high-temperature, in September, in Lake Goodwin, is 66.2°F (19°C), while the average low-temperature is 49.1°F (9.5°C).

What is the average humidity in September?

The average relative humidity in September is 78%.

How many days does it rain in September?

In Lake Goodwin, in September, it is raining for 13.5 days, with typically 2.05" (52mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

What is the average length of the day in September?

The average day length in September is 12h and 34min.

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 many hours of sunshine does Lake Goodwin have in September?

In September, the average sunshine duration is 9.2h.

What is the UV index intensity in September in Lake Goodwin?

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health risk 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
Lake Goodwin, WA

Average temperature in September - Lake Goodwin, WA
  • Average high temperature in September: 66.2°F

The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is December (41.7°F).

  • Average low temperature in September: 49.1°F

The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is February (33.8°F).

Average pressure in September
Lake Goodwin, WA

Average pressure in September - Lake Goodwin, 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
Lake Goodwin, WA

Average wind speed in September - Lake Goodwin, WA
  • Average wind speed in September: 3.9mph

The windiest months (with the highest average wind speed) are January and November (5.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

Average humidity in September
Lake Goodwin, WA

Average humidity in September - Lake Goodwin, WA
  • Average humidity in September: 78%

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

Average rainfall in September
Lake Goodwin, WA

Average rainfall in September - Lake Goodwin, WA
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is November (4.92").
The driest month (with the least rainfall) is July (0.51").

Average rainfall days in September
Lake Goodwin, WA

Average rainfall days in September - Lake Goodwin, WA
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is March (20.9 days).
The month with the least rainy days is August (6.9 days).

Average snowfall in September
Lake Goodwin, WA

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

The month with the highest snowfall is February (4.45").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Lake Goodwin, WA

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

The month with the highest number of snowfall days is February (4.3 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
Lake Goodwin, WA

Average daylight in September / Average sunshine in September - Lake Goodwin, 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 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

Average sunshine days in September
Lake Goodwin, WA

Average sunshine days in September - Lake Goodwin, WA
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is August (22 days).
The month with the least sunshine days is March (8.1 days).

Average UV index in September
Lake Goodwin, WA

Average UV index in September - Lake Goodwin, WA
  • Average UV index in September: 4

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

Average cloud cover in September
Lake Goodwin, WA

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

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

Average visibility in September
Lake Goodwin, WA

Average visibility in September - Lake Goodwin, 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).

Lake Goodwin, Washington, USA

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