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
The move into September indicates a slight reduction in the average high-temperature, down from August's 82.2°F (27.9°C) to a still warm 76.1°F (24.5°C). Altona records a consistent low-temperature of 55°F (12.8°C) during September nights.Humidity
The average relative humidity in September is 69%.Rainfall
In Altona, in September, it is raining for 11.8 days, with typically 1.65" (42mm) of accumulated precipitation. Throughout the year, there are 120.7 rainfall days, and 20.31" (516mm) of precipitation is accumulated.Snowfall
In Altona, snow does not fall in June through September.Daylight
In September, the average length of the day in Altona is 12h and 28min.On the first day of September, sunrise is at 6:54 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:10 pm CDT.
Sunshine
In Altona, Nebraska, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Altona is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, an average UV index of 5 transforms into the following instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Altona?
What is the average humidity in September in Altona?
How much does it rain in Altona in September?
When it does not snow in Altona?
Does it snow in Altona in September?
How many hours of daylight does Altona have in September?
What time are sunrise and sunset in September in Altona?
How long on average sun shines in September in Altona?
How high is the UV index in September in Altona?
Average temperature in September
Altona, NE
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Altona, NE
- Average pressure in September: 29.98"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
Altona, NE
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in September
Altona, NE
- Average humidity in September: 69%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (65%).
Average rainfall in September
Altona, NE
- Average rainfall in September: 1.65"
The wettest months (with the highest rainfall) are May and June (2.91").
The driest months (with the least rainfall) are January and February (0.67").
Average rainfall days in September
Altona, NE
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Altona, NE
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Altona, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Altona, NE
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Altona, NE
- Average sunshine days in September: 16 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Altona, NE
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Altona, NE
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Altona, 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).
Altona, Nebraska, USA
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