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
September
Weather in September
Temperature
The start of September sees the average high-temperature at a mild 15.6°C (60.1°F), showing little difference from August's 17.5°C (63.5°F). Johnstown Bridge, in September, witnesses an average low-temperature of 9°C (48.2°F).Humidity
In Johnstown Bridge, the average relative humidity in September is 89%.Rainfall
In Johnstown Bridge, in September, it is raining for 12.7 days, with typically 20mm (0.79") of accumulated precipitation. In Johnstown Bridge, during the entire year, the rain falls for 170.7 days and collects up to 271mm (10.67") of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 41min.On the first day of the month, sunrise is at 6:37 am and sunset at 8:16 pm. On the last day of September, in Johnstown Bridge, sunrise is at 7:28 am and sunset at 7:06 pm IST.
Sunshine
The average sunshine in September in Johnstown Bridge is 5.8h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 3 translates into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Johnstown Bridge?
What is the average humidity in September in Johnstown Bridge?
How many days does it rain in September in Johnstown Bridge?
When it does not snow in Johnstown Bridge?
How many hours of daylight does Johnstown Bridge have in September?
When are sunrise and sunset in September in Johnstown Bridge?
How many hours of sunshine does Johnstown Bridge have in September?
What is the UV index reading in September in Johnstown Bridge?
Average temperature in September
Johnstown Bridge, Ireland
- Average high temperature in September: 15.6°C
The warmest month (with the highest average high temperature) is July (17.7°C).
The month with the lowest average high temperature is January (6.9°C).
- Average low temperature in September: 9°C
The month with the highest average low temperature is July (10.8°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).
Average pressure in September
Johnstown Bridge, Ireland
- Average pressure in September: 1015.2mbar
The month with the highest atmospheric pressure is May (1015.9mbar).
The month with the lowest atmospheric pressure is November (1008.2mbar).
Average wind speed in September
Johnstown Bridge, Ireland
- Average wind speed in September: 14.7km/h
The windiest month (with the highest average wind speed) is January (20.3km/h).
The calmest months (with the lowest average wind speed) are June and July (13.3km/h).
Average humidity in September
Johnstown Bridge, Ireland
- Average humidity in September: 89%
The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are March and April (85%).
Average rainfall in September
Johnstown Bridge, Ireland
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is August (33mm).
The driest months (with the least rainfall) are January, April and October (16mm).
Average rainfall days in September
Johnstown Bridge, Ireland
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (10.6 days).
Average snowfall in September
Johnstown Bridge, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (15mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Johnstown Bridge, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Johnstown Bridge, Ireland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 5h and 5min
The month with the most sunshine is April (Average sunshine: 6h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Johnstown Bridge, Ireland
- Average sunshine days in September: 10.7 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is July (5.8 days).
Average UV index in September
Johnstown Bridge, Ireland
- Average UV index in September: 3
The months with the highest UV index are May, June and August (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
Johnstown Bridge, Ireland
- Average cloud cover in September: 60
The month with the most cloud cover is July (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in September
Johnstown Bridge, Ireland
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, October, November and December (9km).
The months with the lowest visibility are June, July, August and September (8km).
