September weather forecastSemnan, Iran
September
Weather in September
With summer drawing to a close, September brings a palpable cooler change to Semnan, Iran. Rainfall begins to reappear slowly, albeit insignificantly, and the humidity picks up slightly. The length of daylight hours descends further, signifying the approaching autumn. However, the days remain predominantly sunny, affording residents ample sunshine. The temperatures recede gracefully this month, dropping from a hot 32.7°C (90.9°F) to a less intense 19.4°C (66.9°F), hinting at the upcoming autumn season.Temperature
Semnan, Iran, records a mild change in average high-temperature during September, easing from a very hot 36.7°C (98.1°F) in August to a hot 32.7°C (90.9°F). A significant temperature decrease to an average a comfortable 19.4°C (66.9°F) characterizes Semnan's nighttime temperatures during September.Humidity
The average relative humidity in September is 30%.Rainfall
The month with the least rainfall is September, when the rain falls for 0.8 days and typically collects 1mm (0.04") of precipitation.Snowfall
April through November are months without snowfall in Semnan.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 05:28 and sunset at 18:23. On the last day of September, sunrise is at 05:50 and sunset at 17:41 +0330.
Sunshine
In September, the average sunshine is 10.1h.Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Semnan, Iran
- Average high temperature in September: 32.7°C
The warmest month (with the highest average high temperature) is July (37.8°C).
The month with the lowest average high temperature is January (8.4°C).
- Average low temperature in September: 19.4°C
The month with the highest average low temperature is July (24.9°C).
The coldest month (with the lowest average low temperature) is January (-1°C).
Average humidity in September
Semnan, Iran
- Average humidity in September: 30%
The month with the highest relative humidity is January (63%).
The months with the lowest relative humidity are June and July (28%).
Average rainfall in September
Semnan, Iran
- Average rainfall in September: 1.4mm
The wettest month (with the highest rainfall) is March (22.7mm).
The driest month (with the least rainfall) is September (1.4mm).
Average rainfall days in September
Semnan, Iran
- Average rainfall days in September: 0.8 days
The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is September (0.8 days).
Average snowfall days in September
Semnan, Iran
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Semnan, Iran
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 10h and 6min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
