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 brings a slight decrease in the average high-temperature, shifting from 80.6°F (27°C) in August to a still moderately hot 74.7°F (23.7°C). Montezuma usually reports an average low-temperature of 55.8°F (13.2°C) during the month of September.Humidity
In September, the average relative humidity is 77%.Rainfall
In Montezuma, in September, during 10.7 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, there are 117.7 rainfall days, and 15.12" (384mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Montezuma, the average length of the day in September is 12h and 28min.On the first day of September in Montezuma, sunrise is at 6:36 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:53 pm CDT.
Sunshine
In Montezuma, the average sunshine in September is 9.3h.UV index
In Montezuma, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Montezuma?
What is the average humidity in September in Montezuma?
How much does it rain in Montezuma in September?
When it does not snow in Montezuma?
Does it snow in Montezuma in September?
How many hours of daylight does Montezuma have in September?
When is the sunrise / sunset in September in Montezuma?
How many hours of sunshine does Montezuma have in September?
How high is the UV index in September in Montezuma?
Average temperature in September
Montezuma, IA
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in September
Montezuma, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Montezuma, IA
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Montezuma, IA
- Average humidity in September: 77%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Montezuma, IA
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in September
Montezuma, IA
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Montezuma, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Montezuma, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Montezuma, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Montezuma, IA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in September
Montezuma, IA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Montezuma, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in September
Montezuma, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Montezuma, Iowa, USA
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