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
The beginning of September marks a decrease in the average high-temperature, transitioning from a moderately hot 80.4°F (26.9°C) in August to a pleasant 70.5°F (21.4°C). Saint Thomas temperatures generally rest at a low of 51.6°F (10.9°C) during the September nights.Humidity
The average relative humidity in September is 61%.Rainfall
In Saint Thomas, North Dakota, during September, the rain falls for 8.7 days and regularly aggregates up to 1.81" (46mm) of precipitation. In Saint Thomas, during the entire year, the rain falls for 97.8 days and collects up to 15.83" (402mm) of precipitation.Snowfall
June through September are months without snowfall in Saint Thomas.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:48 am and sunset at 8:11 pm. On the last day of September, in Saint Thomas, North Dakota, sunrise is at 7:28 am and sunset at 7:10 pm CDT.
Sunshine
In Saint Thomas, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Act with care - Obligation to protect against skin and eye damage is highlighted. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What are September temperatures in Saint Thomas?
What is the average humidity in September in Saint Thomas?
How many days does it rain in September in Saint Thomas?
When it does not snow in Saint Thomas?
Does it snow in Saint Thomas in September?
What is the average length of the day in September in Saint Thomas?
When is the sunrise / sunset in September in Saint Thomas?
How many hours of sunshine does Saint Thomas have in September?
How high is the UV index in September in Saint Thomas?
Average temperature in September
Saint Thomas, ND
- Average high temperature in September: 70.5°F
The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is January (14.7°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (0.9°F).
Average pressure in September
Saint Thomas, ND
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Saint Thomas, ND
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is October (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Saint Thomas, ND
- Average humidity in September: 61%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Saint Thomas, ND
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is June (2.8").
The driest months (with the least rainfall) are January and February (0.55").
Average rainfall days in September
Saint Thomas, ND
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (1.6 days).
Average snowfall in September
Saint Thomas, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Saint Thomas, ND
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Thomas, ND
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- 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 12min).
Average sunshine days in September
Saint Thomas, ND
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is August (19.8 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in September
Saint Thomas, ND
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in September
Saint Thomas, ND
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Saint Thomas, 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).
Saint Thomas, North Dakota, USA
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