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 sea temperature 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 advent presents an average high-temperature of a still moderate 13.9°C (57°F), indicating a slight variation from the conditions of the previous month. Throughout September, Greenock encounters an average temperature drop to a chilly 8.7°C (47.7°F).Humidity
The months with the highest humidity are January, August through December, with an average relative humidity of 89%.Rainfall
In Greenock, during September, the rain falls for 21.5 days and regularly aggregates up to 80mm (3.15") of precipitation. Throughout the year, in Greenock, there are 249.9 rainfall days, and 1079mm (42.48") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Sea temperature
In September, the average sea temperature is 14°C (57.2°F).Note: If planning to swim in 14°C (57.2°F) under 10°C (50°F), wear a protective suit. Neglecting this advice might cause immediate cold shock and troubled breathing. A splash around 13°C (55.4°F) is not much warmer.
Daylight
In September, the average length of the day in Greenock is 12h and 44min.On the first day of the month, sunrise is at 6:24 am and sunset at 8:13 pm. On the last day of September, sunrise is at 7:21 am and sunset at 6:56 pm BST.
Sunshine
In September, the average sunshine in Greenock, United Kingdom, is 4.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A typical high UV index of 3 in September suggests the following recommendations:
Be vigilant - Preventing sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
What are September temperatures in Greenock?
What is the most humid month in Greenock?
What is the average humidity in September in Greenock?
How much does it rain in Greenock in September?
When it does not snow in Greenock?
What is the sea water temperature in September in Greenock?
How many hours of daylight does Greenock have in September?
When are sunrise and sunset in September in Greenock?
How long on average sun shines in September in Greenock?
What is the UV index reading in September in Greenock?
Average temperature in September
Greenock, United Kingdom
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is July (16.3°C).
The month with the lowest average high temperature is January (5°C).
- Average low temperature in September: 8.7°C
The month with the highest average low temperature is July (9.8°C).
The coldest month (with the lowest average low temperature) is February (1.4°C).
Average pressure in September
Greenock, United Kingdom
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is May (1015.2mbar).
The month with the lowest atmospheric pressure is November (1006.6mbar).
Average wind speed in September
Greenock, United Kingdom
- Average wind speed in September: 14.5km/h
The windiest month (with the highest average wind speed) is January (19.3km/h).
The calmest months (with the lowest average wind speed) are June and July (11.9km/h).
Average humidity in September
Greenock, United Kingdom
- Average humidity in September: 89%
The months with the highest relative humidity are January, August, September, October, November and December (89%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Greenock, United Kingdom
- Average rainfall in September: 80mm
The wettest month (with the highest rainfall) is December (116mm).
The driest month (with the least rainfall) is April (48mm).
Average rainfall days in September
Greenock, United Kingdom
- Average rainfall days in September: 21.5 days
The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is February (17.8 days).
Average snowfall in September
Greenock, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (53mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Greenock, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Greenock, United Kingdom
- Average sea temperature in September: 14°C
The best month for swimming (with the highest average sea temperature) is August (14.3°C).
The coldest month (with the lowest average sea temperature) is March (7.4°C).
Average daylight in September /
Average sunshine in September
Greenock, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 30min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in September: 4h and 5min
The month with the most sunshine is June (Average sunshine: 6h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 0min).
Average sunshine days in September
Greenock, United Kingdom
- Average sunshine days in September: 6.8 days
The month with the most sunshine days is April (8.8 days).
The months with the least sunshine days are July and August (5.4 days).
Average UV index in September
Greenock, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May and June (UV index 4).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Greenock, United Kingdom
- Average cloud cover in September: 68
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is April (Cloud cover 59).
Average visibility in September
Greenock, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May and November (9km).
The months with the lowest visibility are June, July, August, September, October and December (8km).
Greenock, United Kingdom
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