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
Start of September brings a shift in the average high-temperature, falling from August's hot 87.4°F (30.8°C) to a warm 77°F (25°C). Star witnesses a consistent, sharp contrast from the daytime highs, with an average low-temperature of 54.1°F (12.3°C) throughout September.Humidity
In September, the average relative humidity is 37%.Rainfall
In Star, Idaho, in September, during 6.4 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. Throughout the year, in Star, there are 118.3 rainfall days, and 14.13" (359mm) of precipitation is accumulated.Snowfall
In Star, snow does not fall in May through October.Daylight
In Star, Idaho, the average length of the day in September is 12h and 29min.On the first day of September in Star, Idaho, sunrise is at 7:10 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 7:28 pm MDT.
Sunshine
In Star, the average sunshine in September is 9.5h.UV index
In Star, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What is the temperature in September in Star?
What is the average humidity in September in Star?
How much does it rain in Star in September?
When it does not snow in Star?
What is the average length of the day in September in Star?
When are sunrise and sunset in September in Star?
How long on average sun shines in September in Star?
How high is the UV index in September in Star?
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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