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
September comes with a decrease in the average high-temperature, falling from a tropical 87.6°F (30.9°C) in August to a moderately hot 77.2°F (25.1°C). September is characterized by a distinct thermal shift, with nighttime lows averaging at a cool 53.8°F (12.1°C).Humidity
In Weiser, the average relative humidity in September is 39%.Rainfall
In Weiser, during September, the rain falls for 5.7 days and regularly aggregates up to 0.51" (13mm) of precipitation. In Weiser, during the entire year, the rain falls for 115.6 days and collects up to 13.66" (347mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 7:11 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:29 pm MDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September in Weiser?
When it does not snow?
How many hours of daylight does Weiser have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Weiser have in September?
What is the UV index intensity in September?
Average temperature in September
Weiser, ID
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (32.9°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is August (60.6°F).
The coldest months (with the lowest average low temperature) are January and December (21.2°F).
Average pressure in September
Weiser, ID
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in September
Weiser, ID
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is January (3.3mph).
Average humidity in September
Weiser, ID
- Average humidity in September: 39%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (32%).
Average rainfall in September
Weiser, ID
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is March (2.05").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Weiser, ID
- Average rainfall days in September: 5.7 days
The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is August (4.5 days).
Average snowfall in September
Weiser, ID
- Average snowfall in September: 0"
The month with the highest snowfall is December (7.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Weiser, ID
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (9.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Weiser, ID
- 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: 9h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Weiser, ID
- Average sunshine days in September: 22.1 days
The month with the most sunshine days is July (23 days).
The month with the least sunshine days is March (12 days).
Average UV index in September
Weiser, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Weiser, ID
- Average cloud cover in September: 15
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Weiser, ID
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Weiser, Idaho, USA
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