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 brings a decrease in the average high-temperature, falling from August's moderately hot 76.1°F (24.5°C) to an enjoyable 66.9°F (19.4°C). September nights in Cache bring a pronounced temperature shift, with averages hovering around a wintry 42.3°F (5.7°C).Humidity
The average relative humidity in September in Cache is 52%.Rainfall
In Cache, in September, during 9.5 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Cache, during the entire year, the rain falls for 110.1 days and collects up to 23.35" (593mm) of precipitation.Snowfall
January through June, September through December are months with snowfall in Cache, Idaho. September is the first month it typically snows. Throughout September, in the average 1 snowfall days, it receives 1.06" (27mm) of snow. In Cache, during the entire year, snow falls for 125.3 days and aggregates up to 120.47" (3060mm) of snow.Daylight
In Cache, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:49 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:06 pm MDT.
Sunshine
In Cache, Idaho, the average sunshine in September is 10.1h.UV index
In Cache, Idaho, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 3 translates into these guidelines:
Exercise prevention - Warding off sunburn is urged. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Stay sun-safe with clothing that is both closely woven and worn loosely. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What are September temperatures in Cache?
What is the average humidity in September in Cache?
How many days does it rain in September in Cache?
When does it start to snow in Cache?
How many hours of daylight does Cache have in September?
When is the sunrise / sunset in September in Cache?
How many hours of sunshine does Cache have in September?
How high is the UV index in September in Cache?
Average temperature in September
Cache, ID
- Average high temperature in September: 66.9°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is December (23.9°F).
- Average low temperature in September: 42.3°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in September
Cache, ID
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Cache, ID
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest months (with the lowest average wind speed) are January and December (4.6mph).
Average humidity in September
Cache, ID
- Average humidity in September: 52%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is August (45%).
Average rainfall in September
Cache, ID
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is February (2.91").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in September
Cache, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in September
Cache, ID
- Average snowfall in September: 1.06"
The month with the highest snowfall is January (24.06").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Cache, ID
- Average snowfall days in September: 1 days
The month with the highest number of snowfall days is December (21.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Cache, 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: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Cache, ID
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is July (20.6 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Cache, ID
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March and December (UV index 1).
Average cloud cover in September
Cache, ID
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in September
Cache, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Cache, Idaho, USA
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