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
September
Weather in September
Temperature
With the start of September, Sumaco measures an average high-temperature of a still cool 12.9°C (55.2°F), not significantly differing from August's 12.2°C (54°F). Sumaco records an average nighttime low of 4.7°C (40.5°F) in September.Humidity
With an average relative humidity of 84%, September is the least humid month.Rainfall
In Sumaco, in September, it is raining for 24.2 days, with typically 93mm (3.66") of accumulated precipitation. In Sumaco, during the entire year, the rain falls for 340.3 days and collects up to 2146mm (84.49") of precipitation.Snowfall
January, March through October and December are months with snowfall in Sumaco. In September, it is snowing for 1.6 days. Throughout September, 5mm (0.2") of snow is accumulated. Throughout the year, there are 11.6 snowfall days, and 41mm (1.61") of snow is accumulated.Daylight
The average length of the day in September is 12h and 7min.On the first day of the month, sunrise is at 06:07 and sunset at 18:13. On the last day of September, sunrise is at 05:56 and sunset at 18:03 -05.
Sunshine
With an average of 7.3h of sunshine, September has the most sunshine of the year.UV index
January through April, June through October and December, with an average maximum UV index of 3, are months with the highest UV index in Sumaco. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Exercise prevention - Warding off sunburn is urged. Around midday, solar radiation is most harmful; hence, exposure should be limited. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the least humid month?
What is the average humidity in September?
How many days does it rain in September?
How many days does it snow in September?
How many hours of daylight does Sumaco have in September?
When is the sunrise / sunset in September?
What month has the most sunshine?
How long on average sun shines in September?
When is the highest UV index?
How high is the UV index in September?
Average temperature in September
Sumaco, Ecuador
- Average high temperature in September: 12.9°C
The warmest month (with the highest average high temperature) is November (13.1°C).
The month with the lowest average high temperature is July (11.3°C).
- Average low temperature in September: 4.7°C
The month with the highest average low temperature is February (6.7°C).
The coldest months (with the lowest average low temperature) are July and August (4.3°C).
Average pressure in September
Sumaco, Ecuador
- Average pressure in September: 1014.8mbar
The month with the highest atmospheric pressure is July (1015.7mbar).
The month with the lowest atmospheric pressure is November (1012.7mbar).
Average wind speed in September
Sumaco, Ecuador
- Average wind speed in September: 6.5km/h
The windiest months (with the highest average wind speed) are July and August (7.3km/h).
The calmest months (with the lowest average wind speed) are February, March and November (4.3km/h).
Average humidity in September
Sumaco, Ecuador
- Average humidity in September: 84%
The months with the highest relative humidity are March and April (92%).
The month with the lowest relative humidity is September (84%).
Average rainfall in September
Sumaco, Ecuador
- Average rainfall in September: 93mm
The wettest month (with the highest rainfall) is March (279mm).
The driest month (with the least rainfall) is August (76mm).
Average rainfall days in September
Sumaco, Ecuador
- Average rainfall days in September: 24.2 days
The month with the highest number of rainy days is March (30.4 days).
The month with the least rainy days is September (24.2 days).
Average snowfall in September
Sumaco, Ecuador
- Average snowfall in September: 5mm
The months with the highest snowfall are May, June and July (7mm).
The months with the least snowfall are February and November (0mm).
Average snowfall days in September
Sumaco, Ecuador
- Average snowfall days in September: 1.6 days
The month with the highest number of snowfall days is June (2.2 days).
The month with the least snowfall days is February (0.1 days).
Average daylight in September /
Average sunshine in September
Sumaco, Ecuador
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 6min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is September (Average sunshine: 7h and 18min).
The month with the least sunshine is April (Average sunshine: 4h and 36min).
Average sunshine days in September
Sumaco, Ecuador
- Average sunshine days in September: 3.4 days
The month with the most sunshine days is September (3.4 days).
The months with the least sunshine days are January, February and March (0.2 days).
Average UV index in September
Sumaco, Ecuador
- Average UV index in September: 3
The months with the highest UV index are January, February, March, April, June, July, August, September, October and December (UV index 3).
The months with the lowest UV index are May and November (UV index 2).
Average cloud cover in September
Sumaco, Ecuador
- Average cloud cover in September: 45
The month with the most cloud cover is April (Cloud cover 67).
The month with the least cloud cover is September (Cloud cover 45).
Average visibility in September
Sumaco, Ecuador
- Average visibility in September: 8km
The month with the highest visibility is September (8km).
The months with the lowest visibility are January, February, March, April, November and December (6km).
