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
September
Weather in September
Temperature
September begins with an average high-temperature of a fresh 12.9°C (55.2°F), reflecting close similarity to the preceding month. In Ullapool, the month of September brings a consistent average low-temperature of 8.9°C (48°F), slightly cooler than its daytime highs.Humidity
The months with the highest humidity are July through September, with an average relative humidity of 87%.Rainfall
In Ullapool, United Kingdom, in September, it is raining for 22.2 days, with typically 69mm (2.72") of accumulated precipitation. In Ullapool, during the entire year, the rain falls for 257.2 days and collects up to 876mm (34.49") of precipitation.Snowfall
June through September are months without snowfall.Sea temperature
In Ullapool, in September, the average water temperature is 13.2°C (55.8°F).Note: Swimming in 13.2°C (55.8°F) feels unbearing at 13°C (55.4°F) and can be life-risking below 10°C (50°F), causing breathing issues and cold shock, depending on a person's capacity.
Daylight
In Ullapool, the average length of the day in September is 12h and 47min.On the first day of the month, sunrise is at 6:22 am and sunset at 8:18 pm. On the last day of September, sunrise is at 7:23 am and sunset at 6:57 pm BST.
Sunshine
In Ullapool, United Kingdom, the average sunshine in September is 4.9h.UV index
In Ullapool, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Ullapool in September?
What are the most humid months in Ullapool?
What is the average humidity in September in Ullapool?
How much does it rain in Ullapool in September?
When it does not snow in Ullapool?
Does it snow in Ullapool in September?
What is the water temperature in September in Ullapool?
What is the average length of the day in September in Ullapool?
When is the sunrise / sunset in September in Ullapool?
How long on average sun shines in September in Ullapool?
What is the UV index reading in September in Ullapool?
Average temperature in September
Ullapool, United Kingdom
- Average high temperature in September: 12.9°C
The warmest month (with the highest average high temperature) is July (15°C).
The month with the lowest average high temperature is January (4.3°C).
- Average low temperature in September: 8.9°C
The month with the highest average low temperature is July (10°C).
The coldest month (with the lowest average low temperature) is February (1.6°C).
Average pressure in September
Ullapool, United Kingdom
- Average pressure in September: 1011.2mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1004.8mbar).
Average wind speed in September
Ullapool, United Kingdom
- Average wind speed in September: 17.4km/h
The windiest month (with the highest average wind speed) is January (22.7km/h).
The calmest month (with the lowest average wind speed) is June (13.1km/h).
Average humidity in September
Ullapool, United Kingdom
- Average humidity in September: 87%
The months with the highest relative humidity are July, August and September (87%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Ullapool, United Kingdom
- Average rainfall in September: 69mm
The wettest month (with the highest rainfall) is January (96mm).
The driest month (with the least rainfall) is April (43mm).
Average rainfall days in September
Ullapool, United Kingdom
- Average rainfall days in September: 22.2 days
The month with the highest number of rainy days is August (25.1 days).
The month with the least rainy days is February (18 days).
Average snowfall in September
Ullapool, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (85mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Ullapool, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Ullapool, United Kingdom
- Average sea temperature in September: 13.2°C
The best month for swimming (with the highest average sea temperature) is August (13.3°C).
The coldest month (with the lowest average sea temperature) is March (7.3°C).
Average daylight in September /
Average sunshine in September
Ullapool, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 0min).
The month with the shortest days is December (Average daylight: 6h and 36min).
- Average sunshine in September: 4h and 5min
The month with the most sunshine is June (Average sunshine: 6h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Ullapool, United Kingdom
- Average sunshine days in September: 5.8 days
The month with the most sunshine days is May (7.6 days).
The month with the least sunshine days is August (3.6 days).
Average UV index in September
Ullapool, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Ullapool, United Kingdom
- Average cloud cover in September: 68
The months with the most cloud cover are March, June and July (Cloud cover 69).
The month with the least cloud cover is April (Cloud cover 62).
Average visibility in September
Ullapool, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
