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
With September's onset, the average high-temperature recedes from August's moderately hot 79.9°F (26.6°C) to an agreeable 70°F (21.1°C). Throughout the month of September, the nighttime temperature dips to an average of 51.4°F (10.8°C).Humidity
The average relative humidity in September is 62%.Rainfall
In Niagara, in September, it is raining for 8.3 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, there are 91.5 rainfall days, and 15.31" (389mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 34min.On the first day of the month, sunrise is at 6:50 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:12 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. 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 is the usual temperature for Niagara in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September in Niagara?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Niagara, ND
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is January (15.4°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (1.4°F).
Average pressure in September
Niagara, ND
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Niagara, ND
- Average wind speed in September: 10.1mph
The windiest month (with the highest average wind speed) is October (11mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).
Average humidity in September
Niagara, ND
- Average humidity in September: 62%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Niagara, ND
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is June (2.99").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Niagara, ND
- Average rainfall days in September: 8.3 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is February (1.2 days).
Average snowfall in September
Niagara, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Niagara, ND
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Niagara, ND
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Niagara, ND
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Niagara, ND
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in September
Niagara, ND
- Average cloud cover in September: 29
The months with the most cloud cover are January and February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Niagara, ND
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Niagara, North Dakota, USA
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