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
As Idaho City enters September, the average high-temperature decreases from the a moderately hot 84.7°F (29.3°C) of August to a still warm 73.9°F (23.3°C). Idaho City documents a significant temperature variance in September, with the mean nighttime lows settling at a cool 50.4°F (10.2°C).Humidity
The average relative humidity in September is 41%.Rainfall
In Idaho City, in September, it is raining for 7.4 days, with typically 0.63" (16mm) of accumulated precipitation. In Idaho City, during the entire year, the rain falls for 103.4 days and collects up to 19.84" (504mm) of precipitation.Snowfall
In Idaho City, snow does not fall in July through September.Daylight
In Idaho City, Idaho, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:07 am and sunset at 8:18 pm. On the last day of September, sunrise is at 7:40 am and sunset at 7:25 pm MDT.
Sunshine
In September, the average sunshine in Idaho City is 9.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the usual temperature for Idaho City in September?
What is the average humidity in September in Idaho City?
How much does it rain in Idaho City in September?
When it does not snow in Idaho City?
Does it snow in Idaho City in September?
What is the average length of the day in September in Idaho City?
When are sunrise and sunset in September in Idaho City?
How many hours of sunshine does Idaho City have in September?
What is the UV index reading in September in Idaho City?
Average temperature in September
Idaho City, 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
Idaho City, 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
Idaho City, 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
Idaho City, 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
Idaho City, 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
Idaho City, 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
Idaho City, 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
Idaho City, 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
Idaho City, 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 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
Idaho City, 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
Idaho City, 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
Idaho City, 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
Idaho City, 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).
Idaho City, Idaho, USA
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