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 onset of September results in a decrease in the average high-temperature, receding from a warm 84.7°F (29.3°C) in August to a still moderately hot 73.9°F (23.3°C). Garden Valley records a significant temperature drop in September nights, lowering to an average of 50.4°F (10.2°C).Humidity
In Garden Valley, the average relative humidity in September is 41%.Rainfall
In Garden Valley, during September, the rain falls for 7.4 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 103.4 rainfall days, and 19.84" (504mm) of precipitation is accumulated.Snowfall
In Garden Valley, snow does not fall in July through September.Daylight
In Garden Valley, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 7:07 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:25 pm MDT.
Sunshine
In Garden Valley, Idaho, the average sunshine in September is 9.4h.UV index
In Garden Valley, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 4 transforms into the following advice:
Take precautions - Protection against sun damage is advised. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
What is the usual temperature for Garden Valley in September?
What is the average humidity in September in Garden Valley?
How much does it rain in Garden Valley in September?
When it does not snow in Garden Valley?
Does it snow in Garden Valley in September?
What is the average length of the day in September in Garden Valley?
When is the sunrise / sunset in September in Garden Valley?
How long on average sun shines in September in Garden Valley?
What is the UV index intensity in September in Garden Valley?
Average temperature in September
Garden Valley, ID
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (31.3°F).
- Average low temperature in September: 50.4°F
The month with the highest average low temperature is August (56.8°F).
The coldest month (with the lowest average low temperature) is December (19.4°F).
Average pressure in September
Garden Valley, 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
Garden Valley, ID
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).
Average humidity in September
Garden Valley, ID
- Average humidity in September: 41%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in September
Garden Valley, ID
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is March (2.83").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Garden Valley, ID
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in September
Garden Valley, ID
- Average snowfall in September: 0"
The month with the highest snowfall is January (20.59").
The months with the least snowfall are July, August and September (0").
Average snowfall days in September
Garden Valley, ID
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Garden Valley, 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: 8h and 54min).
- Average sunshine in September: 9h and 2min
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 12min).
Average sunshine days in September
Garden Valley, ID
- Average sunshine days in September: 20.6 days
The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is March (11.2 days).
Average UV index in September
Garden Valley, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Garden Valley, ID
- Average cloud cover in September: 15
The month with the most cloud cover is December (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
Garden Valley, 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 months with the lowest visibility are January, February and December (5mi).
Garden Valley, Idaho, USA
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