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 Parma, the beginning of September is marked by a lowered average high-temperature, shifting from August's hot 90.1°F (32.3°C) to a warm 79.5°F (26.4°C). A noticeable downturn in temperature characterizes the September nights, averaging at a mild 55.4°F (13°C).Humidity
In September, the average relative humidity is 35%.Rainfall
In Parma, during September, the rain falls for 5.3 days and regularly aggregates up to 0.31" (8mm) of precipitation. Throughout the year, there are 108.5 rainfall days, and 10.2" (259mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:12 am and sunset at 8:22 pm. On the last day of September, sunrise is at 7:45 am and sunset at 7:29 pm MDT.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. When the Sun is at its strongest around midday, find shade and limit exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Parma 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?
When is the sunrise / sunset in September?
How many hours of sunshine does Parma have in September?
What is the UV index reading in September?
Average temperature in September
Parma, ID
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (35.6°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is December (24.3°F).
Average pressure in September
Parma, 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
Parma, ID
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Parma, 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
Parma, ID
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is December (1.5").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days in September
Parma, ID
- Average rainfall days in September: 5.3 days
The month with the highest number of rainy days is March (15.4 days).
The month with the least rainy days is August (3.4 days).
Average snowfall in September
Parma, ID
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.21").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Parma, ID
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (7.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Parma, 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 4min
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 30min).
Average sunshine days in September
Parma, ID
- Average sunshine days in September: 22.9 days
The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is March (13.5 days).
Average UV index in September
Parma, 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
Parma, ID
- Average cloud cover in September: 13
The month with the most cloud cover is December (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in September
Parma, ID
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Parma, Idaho, USA
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