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
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from 84.6°F (29.2°C) to a still warm 77.2°F (25.1°C). Mason City encounters a significant temperature differential, with an average low-temperature of 55.2°F (12.9°C) during September nights.Humidity
In Mason City, the average relative humidity in September is 62%.Rainfall
In September, in Mason City, the rain falls for 8.4 days. Throughout September, 0.67" (17mm) of precipitation is accumulated. In Mason City, during the entire year, the rain falls for 93.8 days and collects up to 15.75" (400mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Mason City, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 7:04 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:20 pm CDT.
Sunshine
In September, the average sunshine in Mason City, Nebraska, is 8.9h.UV index
The average daily maximum UV index in September in Mason City is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Mason City in September?
What is the average humidity in September in Mason City?
How much does it rain in Mason City in September?
When it does not snow in Mason City?
Does it snow in Mason City in September?
What is the average length of the day in September in Mason City?
When is the sunrise / sunset in September in Mason City?
How long on average sun shines in September in Mason City?
What is the UV index reading in September in Mason City?
Average temperature in September
Mason City, NE
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Mason City, NE
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Mason City, NE
- Average wind speed in September: 10.1mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in September
Mason City, NE
- Average humidity in September: 62%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is October (60%).
Average rainfall in September
Mason City, NE
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Mason City, NE
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is December (3.7 days).
Average snowfall in September
Mason City, NE
- Average snowfall in September: 0"
The months with the highest snowfall are February and December (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mason City, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mason City, NE
- 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 18min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Mason City, NE
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is October (23 days).
The month with the least sunshine days is April (14.6 days).
Average UV index in September
Mason City, NE
- 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
Mason City, NE
- Average cloud cover in September: 23
The months with the most cloud cover are January and February (Cloud cover 41).
The months with the least cloud cover are July and September (Cloud cover 23).
Average visibility in September
Mason City, NE
- 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).
Mason City, Nebraska, USA
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