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
With the onset of September, Richfield experiences a modest temperature adjustment, with the average high-temperature receding from a moderately hot 81.7°F (27.6°C) in August to a pleasant 70.9°F (21.6°C). Against the backdrop of high daytime temperatures, an average low-temperature of 49.1°F (9.5°C) is noted during September nights.Humidity
In September, the average relative humidity is 39%.Rainfall
In Richfield, in September, it is raining for 6.2 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, in Richfield, there are 74.4 rainfall days, and 8.03" (204mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Richfield, during the entire year, snow falls for 44.1 days and aggregates up to 29.65" (753mm) of snow.Daylight
The average length of the day in September in Richfield is 12h and 29min.On the first day of the month, sunrise is at 7:01 am and sunset at 8:10 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:18 pm MDT.
Sunshine
In September, the average sunshine in Richfield is 9.6h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 4 in September translates into these instructions:
Put precautions into practice - Guidance to elude sunburn is provided. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
How many hours of daylight does Richfield have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September in Richfield?
How high is the UV index in September?
Average temperature in September
Richfield, ID
- Average high temperature in September: 70.9°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in September: 49.1°F
The months with the highest average low temperature are July and August (55.6°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Richfield, ID
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Richfield, ID
- Average wind speed in September: 6.6mph
The windiest months (with the highest average wind speed) are April and June (7.6mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).
Average humidity in September
Richfield, ID
- Average humidity in September: 39%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (32%).
Average rainfall in September
Richfield, ID
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is February (1.02").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Richfield, ID
- Average rainfall days in September: 6.2 days
The month with the highest number of rainy days is May (12 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Richfield, ID
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (7.87").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Richfield, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Richfield, 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 months with the least sunshine are January and December (Average sunshine: 5h and 54min).
Average sunshine days in September
Richfield, ID
- Average sunshine days in September: 21.2 days
The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is May (15.6 days).
Average UV index in September
Richfield, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Richfield, ID
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Richfield, 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).
Richfield, Idaho, USA
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