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 decrease in the average high-temperature, shifting from a warm 81.7°F (27.6°C) in August to an agreeable 70.9°F (21.6°C). Richfield's average nighttime temperatures present a clear contrast to its daytime highs, measured at a chilly 49.1°F (9.5°C) in September.Humidity
The average relative humidity in September is 39%.Rainfall
In Richfield, during September, the rain falls for 6.2 days and regularly aggregates up to 0.43" (11mm) of precipitation. Throughout the year, in Richfield, there are 74.4 rainfall days, and 8.03" (204mm) of precipitation is accumulated.Snowfall
Months with snowfall in Richfield 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. Throughout the year, in Richfield, there are 44.1 snowfall days, and 29.65" (753mm) of snow is accumulated.Daylight
The average length of the day in September 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, in Richfield, sunrise is at 7:33 am and sunset at 7:18 pm MDT.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the usual temperature for Richfield in September?
What is the average humidity in September in Richfield?
How many days does it rain in September in Richfield?
When does it start to snow in Richfield?
What is the average length of the day in September in Richfield?
What time are sunrise and sunset in September in Richfield?
How long on average sun shines in September in Richfield?
What is the UV index intensity in September in Richfield?
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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