September weather forecastHarvey, ND
September
Weather in September
September brings a whiff of fall to Harvey, North Dakota. The weather becomes a blend of mildly warm afternoons and cool evenings, a shift from August's consistent warmth. The daylight hours start to reduce gradually, and humidity levels drop, leading to clearer skies. As the days grow shorter, the fall foliage begins to appear, painting Harvey in vibrant hues. Average temperatures range from 70.3°F (21.3°C) during the day, dipping to 50.9°F (10.5°C) at night, indicating autumn's approach.Temperature
As Harvey enters September, the average high-temperature decreases from the a warm 79.9°F (26.6°C) of August to an agreeable 70.3°F (21.3°C). Throughout the month of September, Harvey witnesses an average low-temperature of 50.9°F (10.5°C).Humidity
In Harvey, the average relative humidity in September is 59%.Rainfall
In September, the rain falls for 9.9 days. Throughout September, 1.73" (44mm) of precipitation is accumulated. Throughout the year, there are 105.9 rainfall days, and 17.32" (440mm) of precipitation is accumulated.Snowfall
In Harvey, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 33min.On the first day of the month, sunrise is at 6:59 am and sunset at 8:19 pm. On the last day of September, sunrise is at 7:38 am and sunset at 7:20 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index in Harvey is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harvey, ND
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (17.1°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (3°F).
Average pressure in September
Harvey, ND
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is February (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Harvey, ND
- Average wind speed in September: 10.4mph
The windiest month (with the highest average wind speed) is October (11.5mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in September
Harvey, ND
- Average humidity in September: 59%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (57%).
Average rainfall in September
Harvey, ND
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is June (3.07").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in September
Harvey, ND
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in September
Harvey, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Harvey, ND
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (16 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Harvey, ND
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Harvey, ND
- Average sunshine days in September: 18 days
The month with the most sunshine days is September (18 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Harvey, 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 December (UV index 1).
Average cloud cover in September
Harvey, ND
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Harvey, 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).
