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's arrival comes with a mild decrease in the average high-temperature, moving subtly from 81.5°F (27.5°C) in August to a still warm 75.2°F (24°C). The low-temperature average for Altamont during September stands at a cool 55°F (12.8°C).Humidity
In Altamont, the average relative humidity in September is 79%.Rainfall
In Altamont, during September, the rain falls for 15.1 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Altamont, Ohio, during the entire year, the rain falls for 182 days and collects up to 33.15" (842mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Altamont is 12h and 27min.On the first day of September, sunrise is at 6:50 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:05 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
In Altamont, Ohio, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What are September temperatures in Altamont?
What is the average humidity in September in Altamont?
How much does it rain in Altamont in September?
When it does not snow in Altamont?
Does it snow in Altamont in September?
How many hours of daylight does Altamont have in September?
When is the sunrise / sunset in September in Altamont?
How long on average sun shines in September in Altamont?
What is the UV index intensity in September in Altamont?
Average temperature in September
Altamont, OH
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Altamont, OH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Altamont, OH
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Altamont, OH
- Average humidity in September: 79%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in September
Altamont, OH
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is April (3.39").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in September
Altamont, OH
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in September
Altamont, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Altamont, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Altamont, OH
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Altamont, OH
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is November (15 days).
The months with the least sunshine days are January and May (8.3 days).
Average UV index in September
Altamont, OH
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Altamont, OH
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Altamont, OH
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January and February (4mi).
Altamont, Ohio, USA
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