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
The introduction of September notes a subtle temperature variation to a still refreshing 16.6°C (61.9°F) from August's 18.9°C (66°F). During September, the average low-temperature in Boston Spa is a chilly 9.3°C (48.7°F).Humidity
In Boston Spa, United Kingdom, the average relative humidity in September is 83%.Rainfall
In Boston Spa, in September, during 5.2 rainfall days, 9mm (0.35") of precipitation is typically accumulated. In Boston Spa, during the entire year, the rain falls for 86.4 days and collects up to 137mm (5.39") of precipitation.Snowfall
In Boston Spa, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 41min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:55 pm. On the last day of September, in Boston Spa, sunrise is at 7:06 am and sunset at 6:43 pm BST.
Sunshine
The average sunshine in September is 7.1h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Boston Spa, United Kingdom. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 4 in September translates into this advice:
Be vigilant - Suggestions to stave off sun damage are provided. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What are the temperatures in Boston Spa in September?
What is the average humidity in September in Boston Spa?
How many days does it rain in September in Boston Spa?
When it does not snow in Boston Spa?
How many hours of daylight does Boston Spa have in September?
What time are sunrise and sunset in September in Boston Spa?
How many hours of sunshine does Boston Spa have in September?
What is the month with the highest UV index in Boston Spa?
How high is the UV index in September in Boston Spa?
Average temperature in September
Boston Spa, United Kingdom
- Average high temperature in September: 16.6°C
The warmest month (with the highest average high temperature) is July (19.4°C).
The month with the lowest average high temperature is January (5.5°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is August (11.4°C).
The coldest month (with the lowest average low temperature) is January (1°C).
Average pressure in September
Boston Spa, United Kingdom
- Average pressure in September: 1015.2mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.7mbar).
Average wind speed in September
Boston Spa, United Kingdom
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is February (17.8km/h).
The calmest month (with the lowest average wind speed) is June (12.5km/h).
Average humidity in September
Boston Spa, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are January, November and December (89%).
The month with the lowest relative humidity is April (80%).
Average rainfall in September
Boston Spa, United Kingdom
- Average rainfall in September: 9mm
The wettest month (with the highest rainfall) is June (18mm).
The driest month (with the least rainfall) is April (3mm).
Average rainfall days in September
Boston Spa, United Kingdom
- Average rainfall days in September: 5.2 days
The month with the highest number of rainy days is July (11 days).
The month with the least rainy days is September (5.2 days).
Average snowfall in September
Boston Spa, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (7mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Boston Spa, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Boston Spa, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 30min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is August (Average sunshine: 7h and 30min).
The months with the least sunshine are February and November (Average sunshine: 4h and 6min).
Average sunshine days in September
Boston Spa, United Kingdom
- Average sunshine days in September: 23.2 days
The month with the most sunshine days is December (23.9 days).
The month with the least sunshine days is July (17.3 days).
Average UV index in September
Boston Spa, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Boston Spa, United Kingdom
- Average cloud cover in September: 52
The month with the most cloud cover is November (Cloud cover 61).
The month with the least cloud cover is April (Cloud cover 51).
Average visibility in September
Boston Spa, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, July, August and December (9km).
The months with the lowest visibility are June, September, October and November (8km).
Boston Spa, United Kingdom
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