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
September's onset introduces a mild reduction in the average high-temperature, from a warm 24.1°C (75.4°F) in August to a refreshing 19.3°C (66.7°F). In Slănic, an average low-temperature of 8.5°C (47.3°F) is recorded during September nights.Humidity
In Slănic, Romania, the average relative humidity in September is 68%.Rainfall
September is the month with the least rainfall in Slănic. Rain falls for 11.4 days and accumulates 33mm (1.3") of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Slănic. Throughout September, in the average 0.2 snowfall days, it receives 5mm (0.2") of snow. Throughout the year, there are 81.7 snowfall days, and 1691mm (66.57") of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 06:38 and sunset at 19:53. On the last day of September, in Slănic, sunrise is at 07:13 and sunset at 18:58 EEST.
Sunshine
The average sunshine in September in Slănic is 10h.UV index
In September, the average daily maximum UV index in Slănic is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What are the temperatures in Slănic in September?
What is the average humidity in September in Slănic?
What is the driest month in Slănic?
How many days does it rain in September in Slănic?
When does it start to snow in Slănic?
How many hours of daylight does Slănic have in September?
When are sunrise and sunset in September in Slănic?
How many hours of sunshine does Slănic have in September?
How high is the UV index in September in Slănic?
Average temperature in September
Slănic, Romania
- Average high temperature in September: 19.3°C
The warmest month (with the highest average high temperature) is August (24.1°C).
The month with the lowest average high temperature is January (-0.3°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-6.7°C).
Average pressure in September
Slănic, Romania
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is December (1020.4mbar).
The month with the lowest atmospheric pressure is June (1013.5mbar).
Average wind speed in September
Slănic, Romania
- Average wind speed in September: 6.7km/h
The windiest month (with the highest average wind speed) is March (7.8km/h).
The calmest month (with the lowest average wind speed) is August (5.9km/h).
Average humidity in September
Slănic, Romania
- Average humidity in September: 68%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Slănic, Romania
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is June (132mm).
The driest month (with the least rainfall) is September (33mm).
Average rainfall days in September
Slănic, Romania
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is May (24.2 days).
The month with the least rainy days is February (7.3 days).
Average snowfall in September
Slănic, Romania
- Average snowfall in September: 5mm
The month with the highest snowfall is December (369mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Slănic, Romania
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Slănic, Romania
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 0min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Slănic, Romania
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is October (16.9 days).
The month with the least sunshine days is May (5.5 days).
Average UV index in September
Slănic, Romania
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Slănic, Romania
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Slănic, Romania
- Average visibility in September: 10km
The months with the highest visibility are August and September (10km).
The months with the lowest visibility are January and February (7km).
Slănic, Romania
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