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 minor decrease, with the average high-temperature reducing from a hot 88.2°F (31.2°C) in August to a moderately hot 77.2°F (25.1°C). Despite drastic daytime highs, Jerome logs an average low-temperature reading of 54°F (12.2°C) throughout September.Humidity
The average relative humidity in September is 35%.Rainfall
In Jerome, during September, the rain falls for 5.9 days and regularly aggregates up to 0.31" (8mm) of precipitation. In Jerome, during the entire year, the rain falls for 86.9 days and collects up to 8.98" (228mm) of precipitation.Snowfall
In Jerome, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 7:03 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:20 pm MDT.
Sunshine
In Jerome, the average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 4 during September leads to these advisories:
Guard yourself - An obligation to protect skin and eyes from harm exists. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Jerome have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Jerome have in September?
What is the UV index intensity in September?
Average temperature in September
Jerome, ID
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (32.9°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).
Average pressure in September
Jerome, ID
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Jerome, ID
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Jerome, ID
- Average humidity in September: 35%
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (29%).
Average rainfall in September
Jerome, ID
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Jerome, ID
- Average rainfall days in September: 5.9 days
The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is July (3.3 days).
Average snowfall in September
Jerome, ID
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.44").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Jerome, ID
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Jerome, 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 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Jerome, ID
- Average sunshine days in September: 22.3 days
The month with the most sunshine days is July (25.2 days).
The month with the least sunshine days is March (15.2 days).
Average UV index in September
Jerome, 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
Jerome, ID
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
Jerome, 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).
Jerome, Idaho, USA
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