September weather forecastAltoona, OH
September
Weather in September
September, the first month of the autumn in Altoona, is still a warm month, with temperature in the range of an average low of 57°F (13.9°C) and an average high of 77.9°F (25.5°C).Temperature
Altoona records a mild change in average high-temperature during September, easing from 84.6°F (29.2°C) in August to a still moderately hot 77.9°F (25.5°C). In the month of September, Altoona witnesses a consistent average low-temperature of 57°F (13.9°C).Humidity
The average relative humidity in September is 76%.Rainfall
In Altoona, during September, the rain falls for 12.5 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Altoona, during the entire year, the rain falls for 161.8 days and collects up to 30.83" (783mm) of precipitation.Snowfall
In Altoona, snow does not fall in May through September.Daylight
The average length of the day in September in Altoona is 12h and 26min.On the first day of the month, sunrise is at 6:59 am and sunset at 8:00 pm. On the last day of September, in Altoona, Ohio, sunrise is at 7:26 am and sunset at 7:14 pm EDT.
Sunshine
In Altoona, Ohio, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index in Altoona is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Altoona, OH
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in September
Altoona, OH
- Average pressure in September: 30.05"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Altoona, OH
- Average wind speed in September: 5.1mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Altoona, OH
- Average humidity in September: 76%
The months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Altoona, OH
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is October (1.97").
Average rainfall days in September
Altoona, OH
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in September
Altoona, OH
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.39").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Altoona, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Altoona, OH
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Altoona, OH
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Altoona, OH
- Average UV index in September: 4
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, February, November and December (UV index 2).
Average cloud cover in September
Altoona, OH
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Altoona, OH
- Average visibility in September: 5mi
The months with the highest visibility are March, April, June, October and November (6mi).
The months with the lowest visibility are January, February, May, July, August, September and December (5mi).
