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 brings a slight decrease in temperature, down from a moderately hot 82.2°F (27.9°C) in August to a still warm 76.3°F (24.6°C). The mean low-temperature during September nights in Calais is a fresh 55.2°F (12.9°C).Humidity
The average relative humidity in September in Calais, Ohio, is 78%.Rainfall
September is the month with the least rainfall in Calais. Rain falls for 9.7 days and accumulates 0.47" (12mm) of precipitation.Snowfall
June through September are months without snowfall in Calais.Daylight
In September, the average length of the day in Calais, Ohio, is 12h and 26min.On the first day of September in Calais, sunrise is at 6:53 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:08 pm EDT.
Sunshine
In September, the average sunshine in Calais is 8.2h.UV index
In Calais, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What are the temperatures in Calais in September?
What is the average humidity in September in Calais?
What is the driest month in Calais?
How many days does it rain in September in Calais?
When it does not snow in Calais?
Does it snow in Calais in September?
What is the average length of the day in September in Calais?
When are sunrise and sunset in September in Calais?
How long on average sun shines in September in Calais?
What is the UV index reading in September in Calais?
Average temperature in September
Calais, OH
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Calais, OH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Calais, OH
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are January and February (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Calais, OH
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in September
Calais, OH
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (1.3").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Calais, OH
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is November (5.8 days).
Average snowfall in September
Calais, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Calais, 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
Calais, 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 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Calais, OH
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in September
Calais, OH
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Calais, OH
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Calais, 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, February, March, May, June, July, August, September, October and December (5mi).
Calais, Ohio, USA
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