September weather forecastBaltimore, Ireland
September
Weather in September
September in Baltimore witnesses a break from the high summer temperatures and humidity levels. The city experiences a slight drop in average daily sunshine and the days start to shorten noticeably. During this time, the wind speeds rise once again, peaking at 38.8km/h (24.1mph). Significantly, September marks the beginning of more stable and consistent temperatures which extend into October.Temperature
With the transition into September, Baltimore notes an average high-temperature of a still refreshing 15.5°C (59.9°F), closely resembling August. Nighttime temperature reflects an average dip to a still moderate 13.6°C (56.5°F) in September, subtly cooler than its daytime highs.Humidity
In Baltimore, the average relative humidity in September is 83%.Rainfall
In Baltimore, in September, it is raining for 12.7 days, with typically 32mm (1.26") of accumulated precipitation. Throughout the year, there are 184.3 rainfall days, and 512mm (20.16") of precipitation is accumulated.Snowfall
March through October are months without snowfall in Baltimore, Ireland.Daylight
The average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 6:51 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:17 pm IST.
Sunshine
The average sunshine in September in Baltimore is 6.7h.UV index
June through September, with an average maximum UV index of 4, are months with the highest UV index in Baltimore. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 suggests this advice:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Baltimore, Ireland
- Average high temperature in September: 15.5°C
The warmest month (with the highest average high temperature) is August (16.5°C).
The month with the lowest average high temperature is February (9.3°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is August (14.5°C).
The coldest month (with the lowest average low temperature) is March (7.1°C).
Average pressure in September
Baltimore, Ireland
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in September
Baltimore, Ireland
- Average wind speed in September: 26.3km/h
The windiest month (with the highest average wind speed) is December (35km/h).
The calmest month (with the lowest average wind speed) is June (23.1km/h).
Average humidity in September
Baltimore, Ireland
- Average humidity in September: 83%
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is February (78%).
Average rainfall in September
Baltimore, Ireland
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is December (73mm).
The driest month (with the least rainfall) is July (30mm).
Average rainfall days in September
Baltimore, Ireland
- Average rainfall days in September: 12.7 days
The months with the highest number of rainy days are January and December (18.5 days).
The month with the least rainy days is June (12 days).
Average snowfall in September
Baltimore, Ireland
- Average snowfall in September: 0mm
The months with the highest snowfall are January, February, November and December (1mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Baltimore, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Baltimore, Ireland
- 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: 6h and 42min
The month with the most sunshine is June (Average sunshine: 8h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Baltimore, Ireland
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is June (15.7 days).
The month with the least sunshine days is February (9 days).
Average UV index in September
Baltimore, Ireland
- Average UV index in September: 4
The months with the highest UV index are June, July, August and September (UV index 4).
The month with the lowest UV index is February (UV index 2).
Average cloud cover in September
Baltimore, Ireland
- Average cloud cover in September: 50
The months with the most cloud cover are January and December (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 48).
Average visibility in September
Baltimore, Ireland
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
