September weather forecast
Parma, ID

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Weather in September

The first month of the autumn, September, is still a warm month in Parma, Idaho, with an average temperature varying between 79.5°F (26.4°C) and 55.4°F (13°C).

Temperature

With September's arrival, Parma's weather changes as the average high-temperature falls from a tropical 90.1°F (32.3°C) in August to a moderately hot 79.5°F (26.4°C). September in Parma presents a pronounced difference from daytime highs, with a consistent average low-temperature of 55.4°F (13°C).

Humidity

The average relative humidity in September is 35%.

Rainfall

In Parma, in September, during 5.3 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Parma, during the entire year, the rain falls for 108.5 days and collects up to 10.2" (259mm) of precipitation.

Snowfall

In Parma, snow does not fall in May through October.

Daylight

In Parma, the average length of the day in September is 12h and 29min.
On the first day of September, sunrise is at 7:12 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:29 pm MDT.

Sunshine

In September, the average sunshine is 9.6h.

UV index

In Parma, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 5 in September translates into these instructions:
Ensure safety - Sun damage prevention is strongly urged. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Stay sun-safe with clothing that is both closely woven and worn loosely.
Updated: Feb 12, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the usual temperature for Parma in September?

In Parma, 79.5°F (26.4°C) is the average high-temperature and 55.4°F (13°C) is the average low-temperature during September.

What is the average humidity in September in Parma?

The average relative humidity in September in Parma is 35%.

How much does it rain in Parma in September?

In Parma, in September, during 5.3 rainfall days, 0.31" (8mm) of precipitation is typically accumulated.

When it does not snow in Parma?

In Parma, snow does not fall in May through October.

How many hours of daylight does Parma have in September?

In September, the average day length is 12h and 29min.

When are sunrise and sunset in September in Parma?

In September, on the first day of the month, sunrise is at 7:12 am and sunset at 8:22 pm. On the last day of the month, in Parma, sunrise is at 7:45 am and sunset at 7:29 pm MDT.

How many hours of sunshine does Parma have in September?

In Parma, Idaho, the average sunshine duration in September is 9.6h.

How high is the UV index in September in Parma?

In Parma, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Parma, ID

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / 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 - 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 - 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 - 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 - 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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