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
Star's transition into September involves a shift in temperature, receding from a hot 87.4°F (30.8°C) in August to a warm 77°F (25°C). Star experiences a significant contrast between daily highs and an average nighttime temperature of 54.1°F (12.3°C) during September.Humidity
In Star, the average relative humidity in September is 37%.Rainfall
In Star, Idaho, during September, the rain falls for 6.4 days and regularly aggregates up to 0.35" (9mm) of precipitation. In Star, during the entire year, the rain falls for 118.3 days and collects up to 14.13" (359mm) of precipitation.Snowfall
May through October are months without snowfall in Star.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 7:10 am and sunset at 8:20 pm. On the last day of September, sunrise is at 7:43 am and sunset at 7:28 pm MDT.
Sunshine
The average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. 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 usual temperature for Star in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Star have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Star, ID
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is December (35.1°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in September
Star, ID
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in September
Star, ID
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are March and April (6.8mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in September
Star, ID
- Average humidity in September: 37%
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in September
Star, ID
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Star, ID
- Average rainfall days in September: 6.4 days
The month with the highest number of rainy days is March (17 days).
The month with the least rainy days is July (4 days).
Average snowfall in September
Star, ID
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Star, ID
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (8.5 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
Star, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Star, ID
- Average sunshine days in September: 21.7 days
The month with the most sunshine days is July (23.1 days).
The month with the least sunshine days is March (12.1 days).
Average UV index in September
Star, 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
Star, ID
- Average cloud cover in September: 14
The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Star, ID
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Star, Idaho, USA
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