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 arrival of September sees a recorded average high-temperature of a warm 82.9°F (28.3°C), showing little divergence from the previous month's conditions. Altoona sees an average low-temperature of 63.7°F (17.6°C) during September.Heat index
The heat index in September is estimated at a hot 89.6°F (32°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.Heat index's context suggests values are appropriate for shady areas and slight breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold particular significance for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Humidity
The average relative humidity in September is 75%.Rainfall
In September, the rain falls for 15.5 days. Throughout September, 2.8" (71mm) of precipitation is accumulated. Throughout the year, there are 180.2 rainfall days, and 42.24" (1073mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Altoona, the average length of the day in September is 12h and 22min.On the first day of September in Altoona, sunrise is at 6:19 am and sunset at 7:10 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:30 pm CDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In Altoona, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
Is it hot in Altoona during September?
What is the average humidity in September in Altoona?
How many days does it rain in September in Altoona?
When it does not snow in Altoona?
What is the average length of the day in September in Altoona?
When is the sunrise / sunset in September in Altoona?
How long on average sun shines in September in Altoona?
What is the UV index intensity in September in Altoona?
Average temperature in September
Altoona, AL
- Average high temperature in September: 82.9°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (49.1°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (34°F).
Average pressure in September
Altoona, AL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Altoona, AL
- Average wind speed in September: 5mph
The windiest months (with the highest average wind speed) are January and February (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in September
Altoona, AL
- Average humidity in September: 75%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Altoona, AL
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is August (4.41").
The driest month (with the least rainfall) is October (2.4").
Average rainfall days in September
Altoona, AL
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is July (22.2 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in September
Altoona, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Altoona, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Altoona, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Altoona, AL
- Average sunshine days in September: 13.1 days
The months with the most sunshine days are October and November (18.5 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Altoona, AL
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Altoona, AL
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June and September (Cloud cover 32).
Average visibility in September
Altoona, AL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Altoona, Alabama, USA
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