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
Stepping into September, Letha observes a temperature decline, with the average high falling from August's tropical 89.2°F (31.8°C) to a warm 78.1°F (25.6°C). Letha, in September, experiences a marked contrast from daytime zeniths to a steady average low-temperature of 53.4°F (11.9°C).Humidity
In September, the average relative humidity is 38%.Rainfall
In September, the rain falls for 5 days. Throughout September, 0.31" (8mm) of precipitation is accumulated. In Letha, during the entire year, the rain falls for 91.7 days and collects up to 10.28" (261mm) of precipitation.Snowfall
May through October are months without snowfall in Letha.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:10 am and sunset at 8:21 pm. On the last day of September, sunrise is at 7:44 am and sunset at 7:28 pm MDT.
Sunshine
The average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Letha in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September in Letha?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September in Letha?
Average temperature in September
Letha, ID
- Average high temperature in September: 78.1°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is December (34.9°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (22.8°F).
Average pressure in September
Letha, ID
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in September
Letha, ID
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Letha, ID
- Average humidity in September: 38%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in September
Letha, ID
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is March (1.54").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Letha, ID
- Average rainfall days in September: 5 days
The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is July (3.2 days).
Average snowfall in September
Letha, ID
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Letha, ID
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (7.5 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
Letha, 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 18min).
Average sunshine days in September
Letha, ID
- Average sunshine days in September: 23.7 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (15.3 days).
Average UV index in September
Letha, 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
Letha, ID
- Average cloud cover in September: 14
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Letha, ID
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Letha, Idaho, USA
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