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 signals a slight drop in average high-temperature, sliding from August's 82.2°F (27.9°C) to a still moderately hot 76.8°F (24.9°C). In Northboro, the September nights cool down to an average low of 57.7°F (14.3°C).Humidity
The average relative humidity in September is 73%.Rainfall
In September, the rain falls for 12.3 days. Throughout September, 2.32" (59mm) of precipitation is accumulated. Throughout the year, in Northboro, Iowa, there are 125.6 rainfall days, and 26.14" (664mm) of precipitation is accumulated.Snowfall
In Northboro, Iowa, snow does not fall in May through September.Daylight
In Northboro, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:04 pm CDT.
Sunshine
In Northboro, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Northboro?
What is the average humidity in September in Northboro?
How much does it rain in Northboro in September?
When it does not snow in Northboro?
Does it snow in Northboro in September?
How many hours of daylight does Northboro have in September?
When are sunrise and sunset in September in Northboro?
How long on average sun shines in September in Northboro?
How high is the UV index in September in Northboro?
Average temperature in September
Northboro, IA
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Northboro, IA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Northboro, IA
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Northboro, IA
- Average humidity in September: 73%
The months with the highest relative humidity are January and July (79%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Northboro, IA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in September
Northboro, IA
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in September
Northboro, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Northboro, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Northboro, IA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Northboro, IA
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Northboro, IA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Northboro, IA
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Northboro, IA
- 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).
Northboro, Iowa, USA
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