September weather forecast
Saint Maries, ID

Weather in September

September, the first month of the autumn in Saint Maries, is also an agreeable month, with an average temperature ranging between max 70.3°F (21.3°C) and min 43.7°F (6.5°C).

Temperature

In September, the average high-temperature decreases from a warm 80.2°F (26.8°C) in August to an agreeable 70.3°F (21.3°C). In Saint Maries, the average low-temperature is 43.7°F (6.5°C).

Humidity

The average relative humidity in September is 59%.

Rainfall

In Saint Maries, Idaho, it is raining for 7.4 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 145.2 rainfall days, and 25.12" (638mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Saint Maries, Idaho, are January through May, September through December. September is the first month it typically snows in Saint Maries. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 70.2 snowfall days, and 59.69" (1516mm) of snow is accumulated.

Daylight

The average length of the day in September is 12h and 32min.
On the first day of September in Saint Maries, sunrise is at 6:05 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:27 pm PDT.

Sunshine

In September, the average sunshine in Saint Maries is 9.7h.

UV index

In Saint Maries, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Saint Maries?

The average high-temperature, in September, in Saint Maries, Idaho, is 70.3°F (21.3°C), while the average low-temperature is 43.7°F (6.5°C).

What is the average humidity in September in Saint Maries?

The average relative humidity in September in Saint Maries is 59%.

How many days does it rain in September in Saint Maries?

In Saint Maries, in September, during 7.4 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.

When does it start to snow in Saint Maries?

September is the first month it typically snows in Saint Maries. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow.

How many hours of daylight does Saint Maries have in September?

The average day length in September in Saint Maries, Idaho, is 12h and 32min.

What time are sunrise and sunset in September in Saint Maries?

In September, on the first day of the month, sunrise is at 6:05 am and sunset at 7:26 pm. On the last day of the month, in Saint Maries, sunrise is at 6:44 am and sunset at 6:27 pm PDT.

How long on average sun shines in September in Saint Maries?

In Saint Maries, Idaho, the average sunshine duration in September is 9.7h.

What is the UV index reading in September in Saint Maries?

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Saint Maries, ID

Average temperature in September - Saint Maries, ID
  • Average high temperature in September: 70.3°F

The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (31.8°F).

  • Average low temperature in September: 43.7°F

The month with the highest average low temperature is August (50.2°F).
The coldest month (with the lowest average low temperature) is December (21.2°F).

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Average pressure in September
Saint Maries, ID

Average pressure in September - Saint Maries, ID
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).

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Average wind speed in September
Saint Maries, ID

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

The windiest month (with the highest average wind speed) is April (5mph).
The calmest months (with the lowest average wind speed) are August and September (4mph).

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Average humidity in September
Saint Maries, ID

Average humidity in September - Saint Maries, ID
  • Average humidity in September: 59%

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in September
Saint Maries, ID

Average rainfall in September - Saint Maries, ID
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is January (3.66").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days in September
Saint Maries, ID

Average rainfall days in September - Saint Maries, ID
  • Average rainfall days in September: 7.4 days

The month with the highest number of rainy days is April (18.7 days).
The month with the least rainy days is July (4.9 days).

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Average snowfall in September
Saint Maries, ID

Average snowfall in September - Saint Maries, ID
  • Average snowfall in September: 0.08"

The month with the highest snowfall is January (16.22").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Saint Maries, ID

Average snowfall days in September - Saint Maries, ID
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is December (16.3 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
Saint Maries, ID

Average daylight in September / Average sunshine in September - Saint Maries, ID
  • Average daylight in September: 12h and 32min

The month with the longest days is June (Average daylight: 15h and 53min).
The month with the shortest days is December (Average daylight: 8h and 33min).

  • Average sunshine in September: 9h and 42min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The months with the least sunshine are February and December (Average sunshine: 3h and 30min).

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Average sunshine days in September
Saint Maries, ID

Average sunshine days in September - Saint Maries, ID
  • Average sunshine days in September: 21.5 days

The month with the most sunshine days is July (25.2 days).
The month with the least sunshine days is March (7.5 days).

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Average UV index in September
Saint Maries, ID

Average UV index in September - Saint Maries, ID
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in September
Saint Maries, ID

Average cloud cover in September - Saint Maries, ID
  • Average cloud cover in September: 23

The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in September
Saint Maries, ID

Average visibility in September - Saint Maries, ID
  • Average visibility in September: 6mi

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

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