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
A moderate decline in the average high-temperature is seen during September, decreasing from a tropical 89.1°F (31.7°C) in August to a moderately hot 78.1°F (25.6°C). Nightly readings in September display a noticeable downturn from daily highs, with the average low-temperature registering a fresh 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 the month, sunrise is at 7:10 am and sunset at 8:20 pm. On the last day of September, sunrise is at 7:42 am and sunset at 7:27 pm MDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Exercise prevention - Warding off sunburn is urged. To protect against the Sun's most potent rays, avoid direct exposure around midday. 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 September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Meridian have in September?
When are sunrise and sunset in September in Meridian?
How long on average sun shines in September?
How high is the UV index in September?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Meridian, Idaho, USA
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