September weather forecast
Blue River, OR

Weather in September

The first month of the autumn, September, is also an agreeable month in Blue River, Oregon, with average temperature varying between 72.3°F (22.4°C) and 47.3°F (8.5°C).

Temperature

In Blue River, the average high-temperature in September marginally drops, from a warm 79.5°F (26.4°C) in August, to an agreeable 72.3°F (22.4°C). In Blue River, the average low-temperature is 47.3°F (8.5°C).

Humidity

In Blue River, the average relative humidity in September is 71%.

Rainfall

In Blue River, during September, the rain falls for 9 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Blue River, Oregon, during the entire year, the rain falls for 167.6 days and collects up to 36.54" (928mm) of precipitation.

Snowfall

In Blue River snow does not fall in May through October.

Daylight

The average length of the day in September is 12.5h.

Sunshine

In September, the average sunshine is 9.5h.

UV index

In Blue River, Oregon, the average daily maximum UV index 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 the ordinary person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Blue River?

In September, the average relative humidity in Blue River is 71%.

How much does it rain in Blue River in September?

In Blue River, in September, during 9 rainfall days, 1.61" (41mm) of precipitation is typically accumulated.

When it does not snow in Blue River?

May through October are months without snowfall.

What is the average length of the day in September in Blue River?

The average length of the day in September in Blue River is 12.5h.

How long on average sun shines in September in Blue River?

The average sunshine in September in Blue River is 9.5h.

How high is the UV index in September in Blue River?

In Blue River, Oregon, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Blue River, OR

Average temperature in September - Blue River, OR
  • Average high temperature in September: 72.3°F

The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (44.4°F).

  • Average low temperature in September: 47.3°F

The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).

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Average pressure in September
Blue River, OR

Average pressure in September - Blue River, OR
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.12").
The month with the lowest atmospheric pressure is August (30").

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Average wind speed in September
Blue River, OR

Average wind speed in September - Blue River, OR
  • Average wind speed in September: 3.9mph

The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in September
Blue River, OR

Average humidity in September - Blue River, OR
  • Average humidity in September: 71%

Months with the highest relative humidity are February, March and December (86%).
The month with the lowest relative humidity is August (66%).

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Average rainfall in September
Blue River, OR

Average rainfall in September - Blue River, OR
  • Average rainfall in September: 1.61"

The wettest month (with the highest rainfall) is December (5.47").
The driest month (with the least rainfall) is July (0.24").

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Average rainfall days in September
Blue River, OR

Average rainfall days in September - Blue River, OR
  • Average rainfall days in September: 9 days

The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is July (4.1 days).

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Average snowfall in September
Blue River, OR

Average snowfall in September - Blue River, OR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.7").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Blue River, OR

Average snowfall days in September - Blue River, OR
  • Average snowfall days in September: 0 days

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

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Average daylight in September /
Average sunshine in September
Blue River, OR

Average daylight in September / Average sunshine in September - Blue River, OR
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is August (Average sunshine: 11.3h).
The month with the least sunshine is February (Average sunshine: 4.1h).

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Average sunshine days in September
Blue River, OR

Average sunshine days in September - Blue River, OR
  • Average sunshine days in September: 19.3 days

The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (8.4 days).

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Average UV index in September
Blue River, OR

Average UV index in September - Blue River, OR
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).

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Average cloud cover in September
Blue River, OR

Average cloud cover in September - Blue River, OR
  • Average cloud cover in September: 30

Months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in September
Blue River, OR

Average visibility in September - Blue River, OR
  • Average visibility in September: 5mi

The month with the highest visibility is August (6mi).
Months with the lowest visibility are February and April (4mi).

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