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's arrival signals a moderate reduction in the average high-temperature, easing from 81.1°F (27.3°C) in August to a still warm 74.3°F (23.5°C). During September nights, Humboldt records an average temperature of 53.4°F (11.9°C).Humidity
In September, the average relative humidity is 70%.Rainfall
In September, in Humboldt, South Dakota, the rain falls for 11.7 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. In Humboldt, during the entire year, the rain falls for 118.3 days and collects up to 22.76" (578mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Humboldt, South Dakota, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:52 am and sunset at 8:03 pm. On the last day of September, sunrise is at 7:25 am and sunset at 7:10 pm CDT.
Sunshine
In September, the average sunshine in Humboldt is 8.7h.UV index
In September, the average daily maximum UV index in Humboldt is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Humboldt in September?
What is the average humidity in September in Humboldt?
How much does it rain in Humboldt in September?
When it does not snow in Humboldt?
Does it snow in Humboldt in September?
What is the average length of the day in September in Humboldt?
What time are sunrise and sunset in September in Humboldt?
How many hours of sunshine does Humboldt have in September?
What is the UV index intensity in September in Humboldt?
Average temperature in September
Humboldt, SD
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in September
Humboldt, SD
- Average pressure in September: 29.97"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Humboldt, SD
- Average wind speed in September: 9.5mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
Humboldt, SD
- Average humidity in September: 70%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Humboldt, SD
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is February (0.63").
Average rainfall days in September
Humboldt, SD
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is June (18.3 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in September
Humboldt, SD
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Humboldt, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Humboldt, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Humboldt, SD
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in September
Humboldt, SD
- 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 and December (UV index 1).
Average cloud cover in September
Humboldt, SD
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Humboldt, SD
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Humboldt, South Dakota, USA
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