September weather forecast
Meridian, ID

englishespañol中文
Share
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

Early signs of fall emerge in Meridian with the advent of September. Features of this month encompass a substantial drop in temperatures from the 80s°F down to the high 70s°F, indicative of the change of seasons. Also, September witnesses an increase in rainfall duration compared to the preceding summer months. Moving towards October, Meridian experiences cooler weather and increased precipitation. Therefore, September signals a slow and steady transition from summer to fall in Meridian.

Temperature

September in Meridian, Idaho, shows a mild decline in the average high-temperature, falling from August's hot 89.1°F (31.7°C) to a warm 78.1°F (25.6°C). Meridian in September observes a sharp transition from the daytime heat, falling to an average low of 54.7°F (12.6°C).

Humidity

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

Rainfall

In Meridian, in September, it is raining for 5.9 days, with typically 0.28" (7mm) of accumulated precipitation. Throughout the year, 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 Meridian, the average length of the day in September is 12h and 29min.
On the first day of September in Meridian, Idaho, sunrise is at 7:10 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:27 pm MDT.

Sunshine

In September, the average sunshine in Meridian is 9.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 5 translates into these guidelines:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
[Resources]

Frequently asked questions

What is the average September temperature in Meridian?

During September, Meridian experiences an average high-temperature of 78.1°F (25.6°C) and a low-temperature of 54.7°F (12.6°C).

What is the average humidity in September in Meridian?

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

How many days does it rain in September in Meridian?

In Meridian, in September, it is raining for 5.9 days, with typically 0.28" (7mm) of accumulated precipitation.

When it does not snow in Meridian?

April through October are months without snowfall in Meridian, Idaho.

How many hours of daylight does Meridian have in September?

The average day length in September in Meridian is 12h and 29min.

When is the sunrise / sunset in September in Meridian?

In September, on the first day of the month, sunrise is at 7:10 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:27 pm MDT.

How long on average sun shines in September in Meridian?

In Meridian, the average sunshine duration in September is 9.5h.

How high is the UV index in September in Meridian?

In Meridian, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
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
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).

[Resources]

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).

[Resources]

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).

[Resources]

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%).

[Resources]

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").

[Resources]

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).

[Resources]

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").

[Resources]

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).

[Resources]

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 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 3min

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).

[Resources]

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).

[Resources]

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).

[Resources]

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).

[Resources]

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).

[Resources]

Meridian, Idaho, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location