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
In September, the meteorological conditions alter, with the average high-temperature shifting from a tropical 90.1°F (32.3°C) in August to a warm 79.2°F (26.2°C). An average low-temperature of 57.9°F (14.4°C) is expected during September.Humidity
In Grand View, the average relative humidity in September is 32%.Rainfall
In Grand View, during September, the rain falls for 3.6 days and regularly aggregates up to 0.12" (3mm) of precipitation. In Grand View, during the entire year, the rain falls for 82.3 days and collects up to 7.44" (189mm) of precipitation.Snowfall
In Grand View, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 7:09 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:26 pm MDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September in Grand View?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day 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 in Grand View?
Average temperature in September
Grand View, ID
- Average high temperature in September: 79.2°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is December (36.9°F).
- Average low temperature in September: 57.9°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is December (25.9°F).
Average pressure in September
Grand View, ID
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Grand View, ID
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in September
Grand View, ID
- Average humidity in September: 32%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is July (25%).
Average rainfall in September
Grand View, ID
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is August (0.08").
Average rainfall days in September
Grand View, ID
- Average rainfall days in September: 3.6 days
The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is July (2 days).
Average snowfall in September
Grand View, ID
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Grand View, ID
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (7.1 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
Grand View, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in September
Grand View, ID
- Average sunshine days in September: 25.7 days
The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (14.9 days).
Average UV index in September
Grand View, ID
- Average UV index in September: 5
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
Grand View, ID
- Average cloud cover in September: 12
The month with the most cloud cover is December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in September
Grand View, 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).
Grand View, Idaho, USA
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