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
The start of September involves a subtle temperature drop, shifting from a hot 33.7°C (92.7°F) in August to a warm 29.1°C (84.4°F). A dramatic downturn marks the September nights, with lows averaging at a cool 10.9°C (51.6°F).Humidity
The average relative humidity in September is 28%.Rainfall
Months with rainfall are January through May, September through December. September is the first month it rains. Throughout September, in the average 0.5 rainfall days, it receives 1mm (0.04") of precipitation. In Chalan Chulan, during the entire year, the rain falls for 64.6 days and collects up to 300mm (11.81") of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Chalan Chulan, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 05:48 and sunset at 18:39. On the last day of the month, sunrise is at 06:08 and sunset at 18:00 +0330.
Sunshine
In Chalan Chulan, the average sunshine in September is 11.3h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 5 during September translates into the following guidance:
Make use of precautions - It is urged to ward off sun damage. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
When does it start to rain?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Chalan Chulan, Iran
- Average high temperature in September: 29.1°C
The warmest month (with the highest average high temperature) is July (34.6°C).
The month with the lowest average high temperature is January (5.2°C).
- Average low temperature in September: 10.9°C
The month with the highest average low temperature is July (17°C).
The coldest month (with the lowest average low temperature) is January (-2.2°C).
Average pressure in September
Chalan Chulan, Iran
- Average pressure in September: 1011.3mbar
The month with the highest atmospheric pressure is December (1021.1mbar).
The month with the lowest atmospheric pressure is July (1004.2mbar).
Average wind speed in September
Chalan Chulan, Iran
- Average wind speed in September: 7.7km/h
The windiest month (with the highest average wind speed) is March (9.9km/h).
The calmest month (with the lowest average wind speed) is November (6.9km/h).
Average humidity in September
Chalan Chulan, Iran
- Average humidity in September: 28%
The month with the highest relative humidity is January (63%).
The month with the lowest relative humidity is July (18%).
Average rainfall in September
Chalan Chulan, Iran
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is March (59mm).
The driest months (with the least rainfall) are June, July and August (0mm).
Average rainfall days in September
Chalan Chulan, Iran
- Average rainfall days in September: 0.5 days
The month with the highest number of rainy days is March (11.2 days).
The months with the least rainy days are July and August (0.3 days).
Average snowfall in September
Chalan Chulan, Iran
- Average snowfall in September: 0mm
The month with the highest snowfall is January (117mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Chalan Chulan, Iran
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Chalan Chulan, Iran
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 11h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 54min).
Average sunshine days in September
Chalan Chulan, Iran
- Average sunshine days in September: 29.5 days
The month with the most sunshine days is July (30.8 days).
The month with the least sunshine days is February (16.7 days).
Average UV index in September
Chalan Chulan, Iran
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Chalan Chulan, Iran
- Average cloud cover in September: 3
The month with the most cloud cover is January (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 3).
Average visibility in September
Chalan Chulan, Iran
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
