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
Humboldt's entry into September measures an average high-temperature of a still warm 74.1°F (23.4°C), closely parallel to the preceding month. Throughout the month of September, Humboldt observes an average nighttime temperature of 54.5°F (12.5°C).Humidity
In September, the average relative humidity is 74%.Rainfall
In Humboldt, Iowa, in September, during 11.7 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, in Humboldt, Iowa, there are 130.6 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Humboldt is 12h and 29min.On the first day of September, sunrise is at 6:42 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:59 pm CDT.
Sunshine
In Humboldt, Iowa, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September in Humboldt is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Humboldt?
What is the average humidity in September in Humboldt?
How many days does it rain in September in Humboldt?
When it does not snow in Humboldt?
Does it snow in Humboldt in September?
How many hours of daylight does Humboldt have in September?
What time are sunrise and sunset in September in Humboldt?
How long on average sun shines in September in Humboldt?
What is the UV index reading in September in Humboldt?
Average temperature in September
Humboldt, IA
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
Humboldt, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Humboldt, IA
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in September
Humboldt, IA
- Average humidity in September: 74%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Humboldt, IA
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
Humboldt, IA
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Humboldt, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Humboldt, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.3 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, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Humboldt, IA
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Humboldt, IA
- 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, November and December (UV index 2).
Average cloud cover in September
Humboldt, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in September
Humboldt, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Humboldt, Iowa, USA
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