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
September signals a slight drop in average high-temperature, sliding from August's moderately hot 84.7°F (29.3°C) to a still warm 76.1°F (24.5°C). During the month of September, the temperature falls to an average of 55.8°F (13.2°C).Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 51%.Rainfall
In September, the rain falls for 9.5 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 108 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Merriman, during the entire year, snow falls for 47.3 days and aggregates up to 19.76" (502mm) of snow.Daylight
In Merriman, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:29 pm MDT.
Sunshine
In Merriman, the average sunshine in September is 10.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What are the least humid months?
What is the average humidity in September?
How many days does it rain in September?
When does it start to snow?
How many hours of daylight does Merriman have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Merriman have in September?
How high is the UV index in September?
Average temperature in September
Merriman, NE
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (32°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Merriman, NE
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Merriman, NE
- Average wind speed in September: 11.5mph
The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity in September
Merriman, NE
- Average humidity in September: 51%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are August and September (51%).
Average rainfall in September
Merriman, NE
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Merriman, NE
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is December (2.8 days).
Average snowfall in September
Merriman, NE
- Average snowfall in September: 0.04"
The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Merriman, NE
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Merriman, NE
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in September
Merriman, NE
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is December (21 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in September
Merriman, NE
- Average UV index in September: 4
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
Merriman, NE
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Merriman, NE
- 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).
Merriman, Nebraska, USA
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