September weather forecastIrkutsk, Russia
September
Weather in September
As Irkutsk moves into autumn, the temperature descends to a more comfortable 14.9°C (58.8°F). September ushers in a mesmerizing array of colors with leaves turning into hues of red, orange, and gold. This beautiful transformation of the local flora paints a breathtaking vista rarely seen in the rest of the country. Cooler evenings and shorter days mark the city's landscape, signaling the end of summer. Looking ahead to October, the temperature continues to decline, characterizing the transition towards winter.Temperature
In Irkutsk, the average high-temperature in September drops from an agreeable 22.7°C (72.9°F) in August to a mild 14.9°C (58.8°F). Throughout the month of September, Irkutsk reports a steady low-temperature average of 3.7°C (38.7°F).Humidity
The average relative humidity in September in Irkutsk is 71%.Rainfall
In Irkutsk, in September, it is raining for 11.5 days, with typically 30mm (1.18") of accumulated precipitation. Throughout the year, there are 102.6 rainfall days, and 310mm (12.2") of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Irkutsk. Throughout September, in the average 1.6 snowfall days, it receives 25mm (0.98") of snow. Throughout the year, there are 96.3 snowfall days, and 621mm (24.45") of snow is accumulated.Daylight
In Irkutsk, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 06:14 and sunset at 19:50. On the last day of September, sunrise is at 07:02 and sunset at 18:42 +08.
Sunshine
In September, the average sunshine in Irkutsk is 7.8h.UV index
In Irkutsk, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 2 suggests these recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Irkutsk, Russia
- Average high temperature in September: 14.9°C
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-13.4°C).
- Average low temperature in September: 3.7°C
The month with the highest average low temperature is July (11.4°C).
The coldest month (with the lowest average low temperature) is January (-23.8°C).
Average pressure in September
Irkutsk, Russia
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is January (1033.4mbar).
The month with the lowest atmospheric pressure is July (1006.6mbar).
Average wind speed in September
Irkutsk, Russia
- Average wind speed in September: 8.2km/h
The windiest month (with the highest average wind speed) is May (9.8km/h).
The calmest month (with the lowest average wind speed) is January (5.7km/h).
Average humidity in September
Irkutsk, Russia
- Average humidity in September: 71%
The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is May (54%).
Average rainfall in September
Irkutsk, Russia
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is July (65mm).
The driest months (with the least rainfall) are January and February (7mm).
Average rainfall days in September
Irkutsk, Russia
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (2.2 days).
Average snowfall in September
Irkutsk, Russia
- Average snowfall in September: 25mm
The month with the highest snowfall is March (123mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Irkutsk, Russia
- Average snowfall days in September: 1.6 days
The month with the highest number of snowfall days is December (16.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Irkutsk, Russia
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is June (Average sunshine: 12h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).
Average sunshine days in September
Irkutsk, Russia
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (12.2 days).
Average UV index in September
Irkutsk, Russia
- Average UV index in September: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Irkutsk, Russia
- Average cloud cover in September: 37
The month with the most cloud cover is December (Cloud cover 64).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Irkutsk, Russia
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The month with the lowest visibility is January (4km).
