September weather forecastKaraj, Iran
September
Weather in September
September signifies the transition from the heat of summer to the profitability of autumn in Karaj. Temperatures start to cool down and the city begins to embrace milder weather. September's claim to fame in Karaj is having the least amount of precipitation, with a slim rainfall of 2mm (0.08") to its name. Owing to the gradually declining sunlight hours, extending from 12.4 hours at the start to less by month's end, Karaj prepares to bid summer goodbye. As the days grow shorter and the breeze cooler, the promise of the upcoming autumn season grows stronger.Temperature
Karaj records a mild change in average high-temperature during September, easing from 34.5°C (94.1°F) in August to a still tropical 30.4°C (86.7°F). In Karaj, a significant divergence from daytime highs is recorded, with average lows of 15.3°C (59.5°F) during September nights.Humidity
In Karaj, the average relative humidity in September is 36%.Rainfall
In September, the rain falls for 0.3 days. Throughout September, 2mm (0.08") of precipitation is accumulated. Throughout the year, there are 44.3 rainfall days, and 252mm (9.92") of precipitation is accumulated.Snowfall
In Karaj, snow does not fall in May through October.Daylight
In September, the average length of the day in Karaj is 12h and 25min.On the first day of September, sunrise is at 05:38 and sunset at 18:33. On the last day of the month, sunrise is at 06:00 and sunset at 17:51 +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
Karaj, Iran
- Average high temperature in September: 30.4°C
The warmest month (with the highest average high temperature) is July (35.2°C).
The month with the lowest average high temperature is January (6.1°C).
- Average low temperature in September: 15.3°C
The month with the highest average low temperature is August (19.1°C).
The coldest month (with the lowest average low temperature) is January (-2.5°C).
Average humidity in September
Karaj, Iran
- Average humidity in September: 36%
The month with the highest relative humidity is January (67%).
The months with the lowest relative humidity are June and August (34%).
Average rainfall in September
Karaj, Iran
- Average rainfall in September: 1.6mm
The wettest month (with the highest rainfall) is March (45.4mm).
The driest month (with the least rainfall) is August (1.2mm).
Average rainfall days in September
Karaj, Iran
- Average rainfall days in September: 0.3 days
The month with the highest number of rainy days is March (6.7 days).
The months with the least rainy days are August and September (0.3 days).
Average snowfall days in September
Karaj, Iran
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.4 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
Karaj, 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 12min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
