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
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a hot 32°C (89.6°F) in August to a moderately hot 27.1°C (80.8°F). In September, the recorded average low-temperature in Heydar Didehban, of 12.8°C (55°F), exhibits a significant fall from the daytime highs.Humidity
The average relative humidity in September in Heydar Didehban is 29%.Rainfall
January through July, September through December are months with rainfall. September is the first month it rains in Heydar Didehban. Throughout September, in the average 1.1 rainfall days, it receives 2mm (0.08") of precipitation. In Heydar Didehban, during the entire year, the rain falls for 72.3 days and collects up to 259mm (10.2") of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 05:53 and sunset at 18:49. On the last day of the month, sunrise is at 06:16 and sunset at 18:06 +0330.
Sunshine
In September, the average sunshine in Heydar Didehban is 10.3h.UV index
In Heydar Didehban, Iran, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 5 during September leads to these advisories:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
What is the usual temperature for Heydar Didehban in September?
What is the average humidity in September in Heydar Didehban?
When does it start raining in Heydar Didehban?
When it does not snow in Heydar Didehban?
What is the average length of the day in September in Heydar Didehban?
What time are sunrise and sunset in September in Heydar Didehban?
How many hours of sunshine does Heydar Didehban have in September?
What is the UV index reading in September in Heydar Didehban?
Average temperature in September
Heydar Didehban, Iran
- Average high temperature in September: 27.1°C
The warmest month (with the highest average high temperature) is July (32.8°C).
The month with the lowest average high temperature is January (1.9°C).
- Average low temperature in September: 12.8°C
The month with the highest average low temperature is July (18°C).
The coldest month (with the lowest average low temperature) is January (-5.6°C).
Average pressure in September
Heydar Didehban, Iran
- Average pressure in September: 1012.4mbar
The month with the highest atmospheric pressure is December (1022mbar).
The month with the lowest atmospheric pressure is July (1006.2mbar).
Average wind speed in September
Heydar Didehban, Iran
- Average wind speed in September: 9.1km/h
The windiest month (with the highest average wind speed) is May (12km/h).
The calmest month (with the lowest average wind speed) is November (7.2km/h).
Average humidity in September
Heydar Didehban, Iran
- Average humidity in September: 29%
The month with the highest relative humidity is January (76%).
The months with the lowest relative humidity are July and August (24%).
Average rainfall in September
Heydar Didehban, Iran
- Average rainfall in September: 2mm
The wettest month (with the highest rainfall) is December (51mm).
The driest month (with the least rainfall) is August (0mm).
Average rainfall days in September
Heydar Didehban, Iran
- Average rainfall days in September: 1.1 days
The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (0.3 days).
Average snowfall in September
Heydar Didehban, Iran
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (225mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Heydar Didehban, Iran
- 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 May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Heydar Didehban, Iran
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 36min).
Average sunshine days in September
Heydar Didehban, Iran
- Average sunshine days in September: 28.2 days
The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (14.3 days).
Average UV index in September
Heydar Didehban, 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, March, November and December (UV index 2).
Average cloud cover in September
Heydar Didehban, Iran
- Average cloud cover in September: 3
The months with the most cloud cover are January, February and March (Cloud cover 30).
The months with the least cloud cover are August and September (Cloud cover 3).
Average visibility in September
Heydar Didehban, Iran
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January, February, March and December (9km).
Heydar Didehban, Iran
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