September weather forecast
Summer Lake, OR

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Weather in September

September, the first month of the autumn in Summer Lake, is also an agreeable month, with an average temperature varying between 69.8°F (21°C) and 45.9°F (7.7°C).

Temperature

The shift from August to September coincides with a small decrease in the average high-temperature, down to an agreeable 69.8°F (21°C) from a moderately hot 78.4°F (25.8°C). During September, Summer Lake reports a marked contrast from daily peak temperatures, with an average nighttime reading of 45.9°F (7.7°C).

Humidity

In September, the average relative humidity in Summer Lake is 53%.

Rainfall

In Summer Lake, in September, during 5.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Summer Lake, during the entire year, the rain falls for 91.4 days and collects up to 15.67" (398mm) of precipitation.

Snowfall

Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 0.75" (19mm) of snow. In Summer Lake, during the entire year, snow falls for 95 days and aggregates up to 73.15" (1858mm) of snow.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:28 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:45 pm PDT.

Sunshine

In Summer Lake, Oregon, the average sunshine in September is 11h.

UV index

In September, the average daily maximum UV index in Summer Lake is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 3 in September interprets into the following advice:
Ensure safety - Sun damage prevention is strongly urged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. To cut down UV radiation exposure by about half, sport a wide-brim hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

What is the temperature in September in Summer Lake?

An average high-temperature, in September, in Summer Lake, is 69.8°F (21°C) and the average low-temperature is 45.9°F (7.7°C).

What is the average humidity in September in Summer Lake?

The average relative humidity in September in Summer Lake, Oregon, is 53%.

How many days does it rain in September in Summer Lake?

In September, in Summer Lake, the rain falls for 5.4 days. Throughout September, 0.63" (16mm) of precipitation is accumulated.

When does it start to snow in Summer Lake?

September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 0.75" (19mm) of snow.

What is the average length of the day in September in Summer Lake?

The average day length in September is 12h and 28min.

When is the sunrise / sunset in September in Summer Lake?

In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:36 pm. On the last day of the month, in Summer Lake, Oregon, sunrise is at 7:00 am and sunset at 6:45 pm PDT.

How many hours of sunshine does Summer Lake have in September?

The average sunshine duration in September is 11h.

What is the UV index reading in September in Summer Lake?

In September, the average daily maximum UV index in Summer Lake, Oregon, is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Summer Lake, OR

Average temperature in September - Summer Lake, OR
  • Average high temperature in September: 69.8°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (34.5°F).

  • Average low temperature in September: 45.9°F

The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (23.7°F).

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Average pressure in September
Summer Lake, OR

Average pressure in September - Summer Lake, OR
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).

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Average wind speed in September
Summer Lake, OR

Average wind speed in September - Summer Lake, OR
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Summer Lake, OR

Average humidity in September - Summer Lake, OR
  • Average humidity in September: 53%

The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is July (45%).

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Average rainfall in September
Summer Lake, OR

Average rainfall in September - Summer Lake, OR
  • Average rainfall in September: 0.63"

The wettest month (with the highest rainfall) is February (2.13").
The driest month (with the least rainfall) is July (0.2").

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Average rainfall days in September
Summer Lake, OR

Average rainfall days in September - Summer Lake, OR
  • Average rainfall days in September: 5.4 days

The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is July (3.3 days).

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Average snowfall in September
Summer Lake, OR

Average snowfall in September - Summer Lake, OR
  • Average snowfall in September: 0.75"

The month with the highest snowfall is February (16.06").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Summer Lake, OR

Average snowfall days in September - Summer Lake, OR
  • Average snowfall days in September: 0.7 days

The month with the highest number of snowfall days is December (16.8 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in September /
Average sunshine in September
Summer Lake, OR

Average daylight in September / Average sunshine in September - Summer Lake, OR
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).

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Average sunshine days in September
Summer Lake, OR

Average sunshine days in September - Summer Lake, OR
  • Average sunshine days in September: 22 days

The month with the most sunshine days is July (25.1 days).
The month with the least sunshine days is March (11.1 days).

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Average UV index in September
Summer Lake, OR

Average UV index in September - Summer Lake, OR
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Summer Lake, OR

Average cloud cover in September - Summer Lake, OR
  • Average cloud cover in September: 17

The months with the most cloud cover are February and December (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 9).

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Average visibility in September
Summer Lake, OR

Average visibility in September - Summer Lake, OR
  • Average visibility in September: 6mi

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

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Summer Lake, Oregon, USA

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