September weather forecast
Meridian, ID

The trees blossom with colorful flower petals near a high water tower in Meridian, Idaho
The trees blossom with colorful flower petals near a high water tower in Meridian, Idaho

Weather in September

September, the first month of the autumn in Meridian, is also a moderately hot month, with temperature in the range of an average high of 78.1°F (25.6°C) and an average low of 54.7°F (12.6°C).

Temperature

In September, the average high-temperature decreases from a hot 89.1°F (31.7°C) in August to a moderately hot 78.1°F (25.6°C). In September, in Meridian, Idaho, the average low-temperature is 54.7°F (12.6°C).

Humidity

In Meridian, Idaho, the average relative humidity in September is 36%.

Rainfall

In September, in Meridian, Idaho, the rain falls for 5.9 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. Throughout the year, in Meridian, Idaho, there are 112.8 rainfall days, and 12.48" (317mm) of precipitation is accumulated.

Snowfall

In Meridian, snow does not fall in April through October.

Daylight

In September, the average length of the day is 12h and 29min.
On the first day of the month, sunrise is at 7:09 am and sunset at 8:21 pm. On the last day of September, sunrise is at 7:42 am and sunset at 7:29 pm MDT.

Sunshine

The average sunshine in September in Meridian is 9.5h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Meridian?

In Meridian, Idaho, in September, the average high-temperature is 78.1°F (25.6°C), and the average low-temperature is 54.7°F (12.6°C).

What is the average humidity in September in Meridian?

In Meridian, Idaho, the average relative humidity in September is 36%.

How many days does it rain in September in Meridian?

In September, in Meridian, the rain falls for 5.9 days. Throughout September, 0.28" (7mm) of precipitation is accumulated.

When it does not snow in Meridian?

In Meridian, Idaho, snow does not fall in April through October.

What is the average length of the day in September in Meridian?

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

When are sunrise and sunset in September in Meridian?

On the first day of September in Meridian, sunrise is at 7:09 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:29 pm MDT.

How long on average sun shines in September in Meridian?

In September, the average sunshine duration is 9.5h.

How high is the UV index in September in Meridian?

The average daily maximum UV index in September in Meridian, Idaho, is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Meridian, ID

Average temperature in September - Meridian, ID
  • Average high temperature in September: 78.1°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is December (36°F).

  • Average low temperature in September: 54.7°F

The month with the highest average low temperature is August (62.2°F).
The coldest month (with the lowest average low temperature) is December (24.6°F).

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Average pressure in September
Meridian, ID

Average pressure in September - Meridian, ID
  • Average pressure in September: 29.94"Hg

The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in September
Meridian, ID

Average wind speed in September - Meridian, ID
  • Average wind speed in September: 5.5mph

The windiest months (with the highest average wind speed) are March and April (7.3mph).
The calmest month (with the lowest average wind speed) is January (5.4mph).

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Average humidity in September
Meridian, ID

Average humidity in September - Meridian, ID
  • Average humidity in September: 36%

The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (30%).

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Average rainfall in September
Meridian, ID

Average rainfall in September - Meridian, ID
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is March (1.97").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in September
Meridian, ID

Average rainfall days in September - Meridian, ID
  • Average rainfall days in September: 5.9 days

The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is July (3.2 days).

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Average snowfall in September
Meridian, ID

Average snowfall in September - Meridian, ID
  • Average snowfall in September: 0"

The month with the highest snowfall is December (4.88").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Meridian, ID

Average snowfall days in September - Meridian, ID
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Meridian, ID

Average daylight in September / Average sunshine in September - Meridian, ID
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 23min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 9h and 30min

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 42min).

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Average sunshine days in September
Meridian, ID

Average sunshine days in September - Meridian, ID
  • Average sunshine days in September: 22.7 days

The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in September
Meridian, ID

Average UV index in September - Meridian, 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).

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Average cloud cover in September
Meridian, ID

Average cloud cover in September - Meridian, ID
  • Average cloud cover in September: 14

The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 8).

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Average visibility in September
Meridian, ID

Average visibility in September - Meridian, 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).

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