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
As August transitions into September, Norwich sees a gentle drop in the average high-temperature, transitioning from a warm 82.2°F (27.9°C) to a still moderately hot 76.8°F (24.9°C). During September, Norwich observes a consistent average nighttime temperature of 57.7°F (14.3°C).Humidity
In September, the average relative humidity in Norwich is 73%.Rainfall
In Norwich, Iowa, in September, it is raining for 12.3 days, with typically 2.32" (59mm) of accumulated precipitation. In Norwich, Iowa, during the entire year, the rain falls for 125.6 days and collects up to 26.14" (664mm) of precipitation.Snowfall
In Norwich, Iowa, snow does not fall in May through September.Daylight
In Norwich, Iowa, the average length of the day in September is 12h and 27min.On the first day of September in Norwich, sunrise is at 6:48 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:04 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index in Norwich is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 5 translates into these guidelines:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Norwich?
What is the average humidity in September in Norwich?
How much does it rain in Norwich in September?
When it does not snow in Norwich?
Does it snow in Norwich in September?
How many hours of daylight does Norwich have in September?
When is the sunrise / sunset in September in Norwich?
How long on average sun shines in September in Norwich?
How high is the UV index in September in Norwich?
Average temperature in September
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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
Norwich, 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).
Norwich, Iowa, USA
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