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
Richardton's average high-temperature decreases in September, falling from a warm 81.7°F (27.6°C) in August to a pleasant 71.4°F (21.9°C). During the nights in September, Richardton experiences a consistent average temperature of 52.7°F (11.5°C).Humidity
In Richardton, North Dakota, the average relative humidity in September is 52%.Rainfall
In Richardton, North Dakota, in September, it is raining for 8.2 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, there are 90.5 rainfall days, and 13.78" (350mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Richardton.Daylight
In Richardton, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:09 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:30 pm MDT.
Sunshine
The average sunshine in September in Richardton is 9.8h.UV index
In Richardton, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Richardton in September?
What is the average humidity in September in Richardton?
How many days does it rain in September in Richardton?
When it does not snow in Richardton?
Does it snow in Richardton in September?
What is the average length of the day in September in Richardton?
When is the sunrise / sunset in September in Richardton?
How many hours of sunshine does Richardton have in September?
What is the UV index reading in September in Richardton?
Average temperature in September
Richardton, ND
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (23.5°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in September
Richardton, ND
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Richardton, ND
- Average wind speed in September: 10.5mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in September
Richardton, ND
- Average humidity in September: 52%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
Richardton, ND
- Average rainfall in September: 1.5"
The wettest months (with the highest rainfall) are May and July (1.93").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Richardton, ND
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is June (12.9 days).
The months with the least rainy days are January and February (2.3 days).
Average snowfall in September
Richardton, ND
- Average snowfall in September: 0"
The month with the highest snowfall is November (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Richardton, ND
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (11.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Richardton, ND
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 24min).
Average sunshine days in September
Richardton, ND
- Average sunshine days in September: 19.9 days
The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is April (14.4 days).
Average UV index in September
Richardton, ND
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Richardton, ND
- Average cloud cover in September: 24
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in September
Richardton, ND
- 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).
Richardton, North Dakota, USA
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