Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September indicates a shift in the average high-temperature, receding from August's moderately hot 84.7°F (29.3°C) to a still warm 73.9°F (23.3°C). Pierce's nights during September are marked by a pronounced drop from daytime temperatures, experiencing an average low of 48°F (8.9°C).Humidity
The average relative humidity in September is 53%.Rainfall
In Pierce, in September, during 7.2 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Pierce, during the entire year, the rain falls for 146.2 days and collects up to 21.65" (550mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September in Pierce, Idaho, is 12h and 32min.On the first day of September, sunrise is at 6:04 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:24 pm PDT.
Sunshine
The average sunshine in September is 9.9h.UV index
The average daily maximum UV index in September in Pierce is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Take precautions - Protection against sun damage is advised. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Pierce in September?
What is the average humidity in September in Pierce?
How much does it rain in Pierce in September?
When it does not snow in Pierce?
Does it snow in Pierce in September?
How many hours of daylight does Pierce have in September?
When are sunrise and sunset in September in Pierce?
How long on average sun shines in September in Pierce?
What is the UV index reading in September in Pierce?
Average temperature in September
Pierce, ID
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (34.2°F).
- Average low temperature in September: 48°F
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (22.8°F).
Average pressure in September
Pierce, 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 (29.93"Hg).
Average wind speed in September
Pierce, ID
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is April (4.6mph).
The calmest month (with the lowest average wind speed) is September (3.7mph).
Average humidity in September
Pierce, ID
- Average humidity in September: 53%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (46%).
Average rainfall in September
Pierce, ID
- Average rainfall in September: 0.71"
The wettest months (with the highest rainfall) are January and March (2.8").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in September
Pierce, ID
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is March (19 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in September
Pierce, ID
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Pierce, ID
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (10.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Pierce, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Pierce, ID
- Average sunshine days in September: 21.6 days
The month with the most sunshine days is July (24.7 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in September
Pierce, 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 February, November and December (UV index 1).
Average cloud cover in September
Pierce, ID
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Pierce, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Pierce, Idaho, USA
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