September weather forecastSis, Iran
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Sis, Iran, with an average temperature ranging between min 13.8°C (56.8°F) and max 24.7°C (76.5°F).Temperature
With the arrival of September, Sis experiences a modest decline in average high-temperatures, transitioning from a warm 29.1°C (84.4°F) in August to a still moderately hot 24.7°C (76.5°F). In Sis, September nights cool down to an average of 13.8°C (56.8°F).Humidity
In September, the average relative humidity is 46%.Rainfall
In Sis, in September, during 6.7 rainfall days, 14mm (0.55") of precipitation is typically accumulated. Throughout the year, there are 120.5 rainfall days, and 352mm (13.86") of precipitation is accumulated.Snowfall
In Sis, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 05:56 and sunset at 18:56. On the last day of September, sunrise is at 06:21 and sunset at 18:11 +0330.
Sunshine
In Sis, the average sunshine in September is 10.2h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 5 in September translates into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sis, Iran
- Average high temperature in September: 24.7°C
The warmest month (with the highest average high temperature) is July (29.6°C).
The month with the lowest average high temperature is January (0.3°C).
- Average low temperature in September: 13.8°C
The month with the highest average low temperature is July (17.8°C).
The coldest month (with the lowest average low temperature) is January (-7°C).
Average pressure in September
Sis, Iran
- Average pressure in September: 1014mbar
The month with the highest atmospheric pressure is December (1022.4mbar).
The month with the lowest atmospheric pressure is July (1008.8mbar).
Average wind speed in September
Sis, Iran
- Average wind speed in September: 9.2km/h
The windiest month (with the highest average wind speed) is July (11.8km/h).
The calmest month (with the lowest average wind speed) is December (6.8km/h).
Average humidity in September
Sis, Iran
- Average humidity in September: 46%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Sis, Iran
- Average rainfall in September: 14mm
The wettest month (with the highest rainfall) is April (52mm).
The driest month (with the least rainfall) is August (11mm).
Average rainfall days in September
Sis, Iran
- Average rainfall days in September: 6.7 days
The month with the highest number of rainy days is April (17.3 days).
The month with the least rainy days is August (4.7 days).
Average snowfall in September
Sis, Iran
- Average snowfall in September: 0mm
The month with the highest snowfall is January (184mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Sis, Iran
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sis, Iran
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 10h and 12min
The month with the most sunshine is August (Average sunshine: 12h and 12min).
The months with the least sunshine are January and December (Average sunshine: 6h and 30min).
Average sunshine days in September
Sis, Iran
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is August (22.7 days).
The month with the least sunshine days is May (8.5 days).
Average UV index in September
Sis, Iran
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Sis, Iran
- Average cloud cover in September: 9
The month with the most cloud cover is January (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in September
Sis, Iran
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January, February and December (9km).
