September weather forecastGriffithstown, United Kingdom
September
Weather in September
September, the first month of the autumn in Griffithstown, is still a comfortable month, with an average temperature fluctuating between 16.7°C (62.1°F) and 10.3°C (50.5°F).Temperature
The arrival of September brings an average high-temperature of a still refreshing 16.7°C (62.1°F), subtly diverging from August's 18.5°C (65.3°F). During September nights, Griffithstown records an average temperature of 10.3°C (50.5°F).Humidity
In September, the average relative humidity is 85%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 31mm (1.22") of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 38min.On the first day of September, sunrise is at 6:25 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:51 pm BST.
Sunshine
In Griffithstown, the average sunshine in September is 7.2h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Griffithstown. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Griffithstown, United Kingdom
- Average high temperature in September: 16.7°C
The warmest month (with the highest average high temperature) is July (18.9°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 10.3°C
The month with the highest average low temperature is August (12.3°C).
The coldest months (with the lowest average low temperature) are January and February (2.8°C).
Average pressure in September
Griffithstown, United Kingdom
- Average pressure in September: 1016.6mbar
The months with the highest atmospheric pressure are May and September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed in September
Griffithstown, United Kingdom
- Average wind speed in September: 14.9km/h
The windiest month (with the highest average wind speed) is February (20.7km/h).
The calmest months (with the lowest average wind speed) are June and July (13.9km/h).
Average humidity in September
Griffithstown, United Kingdom
- Average humidity in September: 85%
The months with the highest relative humidity are January, November and December (88%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Griffithstown, United Kingdom
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is November (72mm).
The driest month (with the least rainfall) is September (31mm).
Average rainfall days in September
Griffithstown, United Kingdom
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is November (18.8 days).
The month with the least rainy days is February (13.3 days).
Average snowfall in September
Griffithstown, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (24mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Griffithstown, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.3 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
Griffithstown, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 12min
The month with the most sunshine is July (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 3h and 48min).
Average sunshine days in September
Griffithstown, United Kingdom
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is March (13.9 days).
The month with the least sunshine days is November (8.1 days).
Average UV index in September
Griffithstown, 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, March, November and December (UV index 2).
Average cloud cover in September
Griffithstown, United Kingdom
- Average cloud cover in September: 50
The month with the most cloud cover is November (Cloud cover 62).
The months with the least cloud cover are April and May (Cloud cover 49).
Average visibility in September
Griffithstown, 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).
