September weather forecast
Halfway, OR

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Weather in September

The first month of the autumn, September, is also an agreeable month in Halfway, Oregon, with an average temperature ranging between max 71.2°F (21.8°C) and min 47.3°F (8.5°C).

Temperature

September's arrival coincides with a drop in the average high-temperature, decreasing from August's warm 81.3°F (27.4°C) to a pleasant 71.2°F (21.8°C). The month of September sees a significant daily temperature drop, recording an average low-temperature of 47.3°F (8.5°C).

Humidity

In September, the average relative humidity is 47%.

Rainfall

In Halfway, in September, it is raining for 6.5 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 113.5 rainfall days, and 12.56" (319mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:11 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:30 pm PDT.

Sunshine

In Halfway, the average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.

Frequently asked questions

What is the average September temperature?

The high-temperature, in September, in Halfway, records 71.2°F (21.8°C), while the low-temperature is 47.3°F (8.5°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 80.6°F (27°C).

What is the average humidity in September?

In September, the average relative humidity is 47%.

How much does it rain in Halfway in September?

In Halfway, in September, during 6.5 rainfall days, 0.43" (11mm) of precipitation is typically accumulated.

When it does not snow?

In Halfway, snow does not fall in June through September.

Does it snow in September?

In Halfway, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

In Halfway, the average day length in September is 12h and 30min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:11 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:30 pm PDT.

How long on average sun shines in September?

In Halfway, the average sunshine duration in September is 10.7h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from 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
Halfway, OR

Average temperature in September - Halfway, OR
  • Average high temperature in September: 71.2°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (30.7°F).

  • Average low temperature in September: 47.3°F

The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).

Average pressure in September
Halfway, OR

Average pressure in September - Halfway, OR
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

Average wind speed in September
Halfway, OR

Average wind speed in September - Halfway, OR
  • Average wind speed in September: 5.4mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (5.4mph).

Average humidity in September
Halfway, OR

Average humidity in September - Halfway, OR
  • Average humidity in September: 47%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (40%).

Average rainfall in September
Halfway, OR

Average rainfall in September - Halfway, OR
  • Average rainfall in September: 0.43"

The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is August (0.31").

Average rainfall days in September
Halfway, OR

Average rainfall days in September - Halfway, OR
  • Average rainfall days in September: 6.5 days

The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is August (4.4 days).

Average snowfall in September
Halfway, OR

Average snowfall in September - Halfway, OR
  • Average snowfall in September: 0"

The month with the highest snowfall is December (10.59").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Halfway, OR

Average snowfall days in September - Halfway, OR
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is December (14.7 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in September /
Average sunshine in September
Halfway, OR

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

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

  • Average sunshine in September: 10h and 4min

The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

Average sunshine days in September
Halfway, OR

Average sunshine days in September - Halfway, OR
  • Average sunshine days in September: 21.4 days

The month with the most sunshine days is July (22.7 days).
The months with the least sunshine days are February and March (11.3 days).

Average UV index in September
Halfway, OR

Average UV index in September - Halfway, OR
  • Average UV index in September: 4

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

Average cloud cover in September
Halfway, OR

Average cloud cover in September - Halfway, OR
  • Average cloud cover in September: 15

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 9).

Average visibility in September
Halfway, OR

Average visibility in September - Halfway, OR
  • Average visibility in September: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).

Halfway, Oregon, USA

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