September weather forecast
Oldtown, ID

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Weather in September

The first month of the autumn, September, is also an agreeable month in Oldtown, Idaho, with an average temperature ranging between max 70.7°F (21.5°C) and min 43.7°F (6.5°C).

Temperature

The commencement of September involves a temperature shift, with the average high-temperature dropping from a warm 82°F (27.8°C) in August to a pleasant 70.7°F (21.5°C). During the nights in September, Oldtown records a pronounced shift from the daytime warmth, with a consistent average temperature of 43.7°F (6.5°C).

Humidity

In Oldtown, the average relative humidity in September is 59%.

Rainfall

In September, in Oldtown, the rain falls for 8.7 days. Throughout September, 0.91" (23mm) of precipitation is accumulated. Throughout the year, in Oldtown, there are 125.5 rainfall days, and 19.92" (506mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Oldtown are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.43" (11mm) of snow. Throughout the year, there are 81.4 snowfall days, and 58.11" (1476mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 34min.
On the first day of the month, sunrise is at 6:07 am and sunset at 7:28 pm. On the last day of September, in Oldtown, sunrise is at 6:47 am and sunset at 6:28 pm PDT.

Sunshine

The average sunshine in September is 10.1h.

UV index

In Oldtown, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Boost your sun resistance with garments that are densely woven yet spacious. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

What are September temperatures in Oldtown?

The high-temperature, in September, in Oldtown, is 70.7°F (21.5°C), while the low-temperature averages to 43.7°F (6.5°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is appraised at 82.4°F (28°C).

What is the average humidity in September in Oldtown?

In September, the average relative humidity in Oldtown, Idaho, is 59%.

How much does it rain in Oldtown in September?

In Oldtown, Idaho, in September, it is raining for 8.7 days, with typically 0.91" (23mm) of accumulated precipitation.

When does it start to snow in Oldtown?

September is the first month it typically snows in Oldtown. Throughout September, in the average 0.2 snowfall days, it receives 0.43" (11mm) of snow.

What is the average length of the day in September in Oldtown?

In September, the average day length is 12h and 34min.

What time are sunrise and sunset in September in Oldtown?

On the first day of September in Oldtown, Idaho, sunrise is at 6:07 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:28 pm PDT.

How long on average sun shines in September in Oldtown?

In September, the average sunshine duration is 10.1h.

What is the UV index intensity in September in Oldtown?

In September, the average daily maximum UV index in Oldtown is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
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
Oldtown, ID

Average temperature in September - Oldtown, ID
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (29.7°F).

  • Average low temperature in September: 43.7°F

The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).

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Average pressure in September
Oldtown, ID

Average pressure in September - Oldtown, ID
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.2"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in September
Oldtown, ID

Average wind speed in September - Oldtown, ID
  • Average wind speed in September: 4mph

The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).

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Average humidity in September
Oldtown, ID

Average humidity in September - Oldtown, ID
  • Average humidity in September: 59%

The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in September
Oldtown, ID

Average rainfall in September - Oldtown, ID
  • Average rainfall in September: 0.91"

The wettest month (with the highest rainfall) is January (2.64").
The driest month (with the least rainfall) is August (0.43").

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Average rainfall days in September
Oldtown, ID

Average rainfall days in September - Oldtown, ID
  • Average rainfall days in September: 8.7 days

The month with the highest number of rainy days is April (16.7 days).
The month with the least rainy days is August (5.8 days).

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Average snowfall in September
Oldtown, ID

Average snowfall in September - Oldtown, ID
  • Average snowfall in September: 0.43"

The month with the highest snowfall is January (16.26").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Oldtown, ID

Average snowfall days in September - Oldtown, ID
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is December (17.8 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Oldtown, ID

Average daylight in September / Average sunshine in September - Oldtown, ID
  • 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: 10h and 1min

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

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Average sunshine days in September
Oldtown, ID

Average sunshine days in September - Oldtown, ID
  • Average sunshine days in September: 19.7 days

The month with the most sunshine days is July (23.1 days).
The month with the least sunshine days is March (9.2 days).

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Average UV index in September
Oldtown, ID

Average UV index in September - Oldtown, ID
  • 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 February, November and December (UV index 1).

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Average cloud cover in September
Oldtown, ID

Average cloud cover in September - Oldtown, ID
  • Average cloud cover in September: 23

The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 14).

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Average visibility in September
Oldtown, ID

Average visibility in September - Oldtown, ID
  • Average visibility in September: 6mi

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).

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Oldtown, Idaho, USA

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