September weather forecastJohnstone, United Kingdom
September
Weather in September
September, the first month of the autumn in Johnstone, is still a refreshing month, with temperature in the range of an average high of 14.2°C (57.6°F) and an average low of 8.5°C (47.3°F).Temperature
As August turns into September, the average high-temperatures rest at a still refreshing 14.2°C (57.6°F), showing a minor variation from the prior month. Johnstone's nighttime temperature in September drops to an average of 8.5°C (47.3°F).Humidity
January, September through December, with an average relative humidity of 89%, are the most humid months in Johnstone.Rainfall
In Johnstone, United Kingdom, in September, during 22.1 rainfall days, 69mm (2.72") of precipitation is typically accumulated. Throughout the year, there are 259.2 rainfall days, and 976mm (38.43") of precipitation is accumulated.Snowfall
In Johnstone, snow does not fall in May through October.Daylight
In Johnstone, the average length of the day in September is 12h and 44min.On the first day of September in Johnstone, United Kingdom, sunrise is at 6:23 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 6:55 pm BST.
Sunshine
In September, the average sunshine is 5.6h.UV index
In September, the average daily maximum UV index in Johnstone is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Act with care - The need to guard against sun damage is communicated. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Johnstone, United Kingdom
- Average high temperature in September: 14.2°C
The warmest month (with the highest average high temperature) is July (16.7°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (10.1°C).
The coldest month (with the lowest average low temperature) is January (1.4°C).
Average pressure in September
Johnstone, United Kingdom
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.8mbar).
Average wind speed in September
Johnstone, United Kingdom
- Average wind speed in September: 14.4km/h
The windiest month (with the highest average wind speed) is January (18.9km/h).
The calmest months (with the lowest average wind speed) are June and July (12.2km/h).
Average humidity in September
Johnstone, United Kingdom
- Average humidity in September: 89%
The months with the highest relative humidity are January, September, October, November and December (89%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Johnstone, United Kingdom
- Average rainfall in September: 69mm
The wettest month (with the highest rainfall) is August (110mm).
The driest month (with the least rainfall) is April (44mm).
Average rainfall days in September
Johnstone, United Kingdom
- Average rainfall days in September: 22.1 days
The month with the highest number of rainy days is August (26.5 days).
The month with the least rainy days is February (18.3 days).
Average snowfall in September
Johnstone, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (67mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Johnstone, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Johnstone, United Kingdom
- Average daylight in September: 12h and 42min
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: 5h and 36min
The month with the most sunshine is June (Average sunshine: 7h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in September
Johnstone, United Kingdom
- Average sunshine days in September: 5.8 days
The month with the most sunshine days is April (9.2 days).
The month with the least sunshine days is August (2.8 days).
Average UV index in September
Johnstone, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June and July (UV index 4).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Johnstone, United Kingdom
- Average cloud cover in September: 64
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in September
Johnstone, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, May and November (9km).
The months with the lowest visibility are January, June, July, August, September, October and December (8km).
